CN101976796B - Method for inhibiting amplified spontaneous radiation of large-size sheet laser neodymium glass - Google Patents
Method for inhibiting amplified spontaneous radiation of large-size sheet laser neodymium glass Download PDFInfo
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- CN101976796B CN101976796B CN2010102738197A CN201010273819A CN101976796B CN 101976796 B CN101976796 B CN 101976796B CN 2010102738197 A CN2010102738197 A CN 2010102738197A CN 201010273819 A CN201010273819 A CN 201010273819A CN 101976796 B CN101976796 B CN 101976796B
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- laser neodymium
- neodymium glass
- lath
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- 239000011521 glass Substances 0.000 title claims abstract description 290
- 229910052779 Neodymium Inorganic materials 0.000 title claims abstract description 163
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 title claims abstract description 163
- 238000000034 method Methods 0.000 title claims abstract description 40
- 230000002269 spontaneous effect Effects 0.000 title claims abstract description 24
- 230000005855 radiation Effects 0.000 title abstract 3
- 230000002401 inhibitory effect Effects 0.000 title abstract 2
- 239000000853 adhesive Substances 0.000 claims abstract description 47
- 230000001070 adhesive effect Effects 0.000 claims abstract description 47
- 230000003287 optical effect Effects 0.000 claims description 42
- 239000007822 coupling agent Substances 0.000 claims description 32
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 claims description 22
- 241000931526 Acer campestre Species 0.000 claims description 16
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical group [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims description 16
- 229910000077 silane Inorganic materials 0.000 claims description 16
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 13
- 230000002378 acidificating effect Effects 0.000 claims description 12
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 11
- 229960004643 cupric oxide Drugs 0.000 claims description 11
- 238000007493 shaping process Methods 0.000 claims description 10
- 238000007711 solidification Methods 0.000 claims description 8
- 230000008023 solidification Effects 0.000 claims description 8
- 239000002253 acid Substances 0.000 claims description 7
- 230000000295 complement effect Effects 0.000 claims description 6
- 230000005764 inhibitory process Effects 0.000 claims description 5
- 239000005365 phosphate glass Substances 0.000 claims description 5
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 claims description 4
- 150000001242 acetic acid derivatives Chemical class 0.000 claims description 4
- 150000001875 compounds Chemical class 0.000 claims description 4
- 230000008602 contraction Effects 0.000 claims description 4
- 238000007654 immersion Methods 0.000 claims description 4
- 239000000087 laser glass Substances 0.000 claims description 4
- 238000003754 machining Methods 0.000 claims description 3
- 230000010355 oscillation Effects 0.000 abstract description 15
- 230000003071 parasitic effect Effects 0.000 abstract description 14
- 238000010521 absorption reaction Methods 0.000 abstract description 4
- 238000005498 polishing Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 10
- 238000004140 cleaning Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000010949 copper Substances 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000005245 sintering Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 238000010306 acid treatment Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000012790 adhesive layer Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 239000000075 oxide glass Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
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Abstract
A method for inhibiting large-size sheet laser neodymium glass from amplifying spontaneous radiation comprises selecting absorption glass and organic adhesive matched with the sheet laser neodymium glass; and (II) processing and pasting the sheet laser neodymium glass and the absorption glass lath, and (III) precisely polishing the light passing surface of the sheet laser neodymium glass. The invention can effectively restrain the amplified spontaneous radiation and parasitic oscillation of the large-size sheet laser neodymium glass, the gain performance is close to the theoretical calculation level, and the invention has better stability and meets the use requirement of a high-power laser device.
Description
Technical field
The present invention relates to solid-state laser, particularly a kind of inhibition large-size flaky laser neodymium glass amplified spontaneous emission (Amplified Spontaneous Emission, abbreviate ASE as) method, or rather, be a kind of method that suppresses amplified spontaneous emission of large scale laser neodymium glass and parasitic oscillation.
Background technology
The condition that parasitic oscillation forms is Re
D β〉=1, R is the edge reflection rate in the formula, and β is a gain coefficient, D is a laser neodymium glass sheet major diameter, along with D β increases, is easy to take place parasitic oscillation and amplified spont-aneous emission (ASE), cause escape and the minimizing of inverted population Δ n, the laser neodymium glass gain is reduced.Parasitic oscillation is divided into two kinds of patterns:
The body spurious mode is sawtooth waveforms and propagates in the parallel flat laser neodymium glass;
The surface spurious mode is propagated along laser neodymium glass sheet surface, and surface absorption xenon lamp is stronger, and its β value is higher, and D β value is also bigger, and it is bigger that the parasitic oscillation possibility takes place.
Work as Re
D β〉=1, parasitic oscillation takes place.Take place between laser neodymium glass and the heat absorbing glass after the lamination, R=0.044, amplifier gain sharply descends.
1＞Re
D β＞0, convergent oscillation forms amplified spontaneous emission (ASE) loss.
Even R=0, D β 〉=3 o'clock, the ASE loss of one way becomes the main path that counter-rotating particle Δ n escapes.
The D β value of main amplifier is 2.4, and surperficial β value＞0.06 will obtain the disk amplifier of higher gain, and the method and the technology that suppress parasitic oscillation in the sheet laser neodymium glass amplifier seem very important.
The effective ways that suppress and reduce parasitic oscillation are to mix cupric oxide glass what laser neodymium glass sheet side coupling one deck can effectively absorb 1.053um fluorescence, and edge reflection is reduced near zero.
Early stage to suppress and reduce the comparatively ripe method of parasitic oscillation mainly be that technology by sintering or cast is connected to the side of laser neodymium glass with heat absorbing glass, in the hope of reaching the purpose that suppresses amplified spontaneous emission and parasitic oscillation.But shortcomings such as rate of finished products is low, cost is high, have a big risk, residual reflectance is big that this method exists have limited the application of said method on the large scale laser neodymium glass.
Summary of the invention
The objective of the invention is to guarantee the effective amplifying power of laser neodymium glass to laser energy, a kind of method that suppresses the amplified spontaneous emission of large scale laser neodymium glass is provided, to suppress amplified spontaneous emission of large-size flaky laser neodymium glass and parasitic oscillation effectively, make gain performance near the Theoretical Calculation level, satisfy the instructions for use of device of high power laser.
Technical solution of the present invention is as follows:
A kind of method that suppresses the amplified spontaneous emission of large-size flaky laser neodymium glass is characterized in that this method comprises the following steps:
(1) choose heat absorbing glass and the organic adhesive that is complementary with described sheet laser neodymium glass: the difference of the thermal coefficient of expansion of the thermal coefficient of expansion of this heat absorbing glass and described sheet laser neodymium glass is less than 2%, and described heat absorbing glass is at the refractive index n of optical maser wavelength
1Greater than the refractive index n of described sheet laser neodymium glass in optical maser wavelength
2, and n
1-n
2=0.0005～0.005; Choose organic adhesive, this organic adhesive and described sheet laser neodymium glass are in the refractive index match of optical maser wavelength, and described organic adhesive is at the refractive index n of optical maser wavelength
3, require to satisfy relational expression: n
2＜n
3＜n
1
(2) processing and the stickup of described sheet laser neodymium glass and heat absorbing glass lath: the heat absorbing glass lath that the periphery of described sheet laser neodymium glass apolegamy size is adapted also carries out optics processing, after treatment, use described organic adhesive, described heat absorbing glass lath is closely sticked on the periphery of described sheet laser neodymium glass;
(3) the logical light face of sheet laser neodymium glass carries out precise polished: the sheet laser neodymium glass of periphery all having been pasted described heat absorbing glass lath carries out the external dimensions shaping, and the logical light face of described sheet laser neodymium glass is carried out precise polished and reaches designing requirement.
Described (two) step comprises following concrete steps:
1. the side separately to the periphery of described sheet laser neodymium glass carries out optics processing, size according to the side separately of described sheet laser neodymium glass, the heat absorbing glass lath that the apolegamy size adapts, and described heat absorbing glass lath is carried out optics process;
2. described sheet laser neodymium glass and described heat absorbing glass lath are carried out optical flat after the optics processing, implement acidic materials and handle and coupling agent treatment;
3. use described organic adhesive, described heat absorbing glass lath is closely sticked on the corresponding side of described sheet laser neodymium glass;
4. the side that described sheet laser neodymium glass is not pasted the heat absorbing glass lath as yet carries out optics processing one by one, the size of not pasting the side of heat absorbing glass lath as yet according to described sheet laser neodymium glass, be equipped with the heat absorbing glass lath that size adapts, described heat absorbing glass lath is carried out optics processing;
5. described sheet laser neodymium glass and described heat absorbing glass lath are carried out optical flat after the optics processing, implement acidic materials and handle and coupling agent treatment;
6. use described organic adhesive, described heat absorbing glass lath is closely sticked on the corresponding side of described sheet laser neodymium glass
Described heat absorbing glass is the phosphate glass of doping cupric oxide, and the percentage by weight of this heat absorbing glass doping cupric oxide is 0.1%～1%.
Described organic adhesive non-volatility component in solidification process produces; Described organic adhesive cubical contraction in solidification process is lower than 7%.
Described coupling agent is silane coupler or titanate coupling agent, described coupling agent treatment is that described silane coupler or titanate coupling agent are dissolved in the acetic acid,diluted, and the optical surface that needs are handled is immersed in the acid solution of described silane coupler or titanate coupling agent and handles.
Described acidic materials are acetate, the compound concentration 0.2mol/L of this acetate, the optical flat of described neodymium glass side of immersion treatment and described heat absorbing glass lath.
The requirement on machining accuracy of the optical flat that described laser glass side and described heat absorbing glass lath are pasted mutually reaches fineness more than 2 grades or 2 grades, and evenness reaches or is better than 4 λ.
The vertical plane of the logical light face of the side of described laser neodymium glass and this laser neodymium glass has 1 °～4 ° inclination angle, and the inclination angle of opposite flank is parallel to each other.
The present invention compared with prior art, advantage is:
1, the inventive method, owing to do not need high temperature sintering and precision temperature control, so technology is simple, easy operating.
2, the inventive method, by organic adhesive is chosen, its refractive index can accurately be mated with laser neodymium glass, heat absorbing glass, guarantees to suppress the effect of ASE parasitic oscillation.
3, the inventive method is by choosing different Cu
2+The heat absorbing glass of ion concentration can effectively be controlled heat absorbing glass thermal effect and the ability that absorbs laser, reaches the balance that suppresses ASE effect and long-time steady operation.
4, the inventive method avoided the direct sintering effect of heat absorbing glass and laser glass, so additional stress is little, does not influence the optical homogeneity in the large scale neodymium glass clear aperture, is particularly suitable for suppressing the amplified spontaneous emission of large scale laser neodymium glass.
5, the inventive method, be processed into certain inclination angle by side to the sheet laser neodymium glass, filter impurity minimizing absorption source in the organic adhesive, organic adhesive be can effectively reduce and laser damage and heat damage suffered, can not come unstuck by long-time steady operation, guarantee that the neodymium glass gain coefficient does not descend.
6, technical operating procedure of the present invention is safe and reliable, and the inhibition large scale laser neodymium glass amplified spontaneous emission that is suitable for mass is used, and is easy to realize the consistency of performance between product.
Description of drawings
Fig. 1 is the sheet laser neodymium glass long side and the heat absorbing glass lath configuration schematic diagram of the embodiment of the invention 1.
Fig. 2 is that the sheet laser neodymium glass long side and the heat absorbing glass lath of the embodiment of the invention 1 pasted signal.
Fig. 3 is short side of the sheet laser neodymium glass of the embodiment of the invention 1 and heat absorbing glass lath configuration schematic diagram.
Fig. 4 is that the sheet laser neodymium glass long side and the heat absorbing glass lath of the embodiment of the invention 1 pasted schematic diagram.
Fig. 5 is the sheet laser neodymium glass overall dimension shaping of the embodiment of the invention 1 and the logical light face structural representation after precise polished.
Fig. 6 is four hypotenuses and the heat absorbing glass lath configuration schematic diagram of the embodiment of the invention 3 octagon sheet laser neodymium glass.
Fig. 7 is four hypotenuses of the embodiment of the invention 3 octagon sheet laser neodymium glass and the structural representation after the stickup of heat absorbing glass lath.
Fig. 8 is four straight flanges and the heat absorbing glass lath configuration schematic diagram of the embodiment of the invention 3 octagon sheet laser neodymium glass.
Fig. 9 is the embodiment of the invention 3 octagon sheet laser neodymium glass overall dimension shapings and the logical light face structural representation after precise polished.
Embodiment
The invention will be further described below in conjunction with drawings and Examples, but should not limit protection scope of the present invention with this.
To polygon large-size flaky laser neodymium glass, the present invention is described below:
A kind of method that suppresses the amplified spontaneous emission of large-size flaky laser neodymium glass, this method comprises the following steps:
1. choose the heat absorbing glass that is complementary with described sheet laser neodymium glass, the difference of the thermal coefficient of expansion of the thermal coefficient of expansion of this heat absorbing glass and described sheet laser neodymium glass is less than 2%, and described heat absorbing glass is at the refractive index n of optical maser wavelength
1Greater than the refractive index n of described sheet laser neodymium glass in optical maser wavelength
2, and n
1-n
2=0.0005～0.005; Choose organic adhesive, this organic adhesive and described sheet laser neodymium glass are in the refractive index match of optical maser wavelength, and described organic adhesive is at the refractive index n of optical maser wavelength
3, require to satisfy relational expression: n
2＜n
3＜n
1
2. the side separately to the periphery of described sheet laser neodymium glass carries out optics processing, size according to the side separately of described sheet laser neodymium glass, the heat absorbing glass lath that the apolegamy size adapts, and described heat absorbing glass lath is carried out optics process;
3. described sheet laser neodymium glass and described heat absorbing glass lath are carried out optical flat after the optics processing, implement acidic materials and handle and coupling agent treatment;
4. use described organic adhesive, described heat absorbing glass lath is closely sticked on the corresponding side of described sheet laser neodymium glass;
5. the side that described sheet laser neodymium glass is not pasted the heat absorbing glass lath as yet carries out optics processing one by one, the size of not pasting the side of heat absorbing glass lath as yet according to described sheet laser neodymium glass, be equipped with the heat absorbing glass lath that size adapts, described heat absorbing glass lath is carried out optics processing;
6. described sheet laser neodymium glass and described heat absorbing glass lath are carried out optical flat after the optics processing, implement acidic materials and handle and coupling agent treatment;
7. use described organic adhesive, described heat absorbing glass lath is closely sticked on the corresponding side of described sheet laser neodymium glass;
8. the described sheet laser neodymium glass of periphery all having been pasted described heat absorbing glass lath carries out the external dimensions shaping, and the logical light face of described sheet laser neodymium glass is carried out precise polished and reaches designing requirement.
Described heat absorbing glass is the phosphate glass of doping cupric oxide, and the percentage by weight of this heat absorbing glass doping cupric oxide is 0.1%～1%.
Described organic adhesive non-volatility component in solidification process produces; Described organic adhesive cubical contraction in solidification process is lower than 7%.
Described coupling agent is silane coupler or titanate coupling agent, described coupling agent treatment is that described silane coupler or titanate coupling agent are dissolved in the acetic acid,diluted, and the optical surface that needs are handled is immersed in the acid solution of described silane coupler or titanate coupling agent and handles.
Described acidic materials are acetate, the compound concentration 0.2mol/L of this acetate, the optical flat of described neodymium glass side of immersion treatment and described heat absorbing glass lath.
The requirement on machining accuracy of the optical flat that described laser glass side and described heat absorbing glass lath are pasted mutually reaches fineness more than 2 grades or 2 grades, and evenness reaches or is better than 4 λ.
The vertical plane of the logical light face of the side of described laser neodymium glass and this laser neodymium glass has 1 °～4 ° inclination angle, and the inclination angle of opposite flank is parallel to each other.
See also Fig. 1 to Fig. 5, Fig. 1 is the sheet laser neodymium glass long side and the heat absorbing glass lath configuration schematic diagram of the embodiment of the invention 1.Fig. 2 is that the sheet laser neodymium glass long side and the heat absorbing glass lath of the embodiment of the invention 1 pasted signal.Fig. 3 is short side of the sheet laser neodymium glass of the embodiment of the invention 1 and heat absorbing glass lath configuration schematic diagram.Fig. 4 is that the sheet laser neodymium glass long side and the heat absorbing glass lath of the embodiment of the invention 1 pasted schematic diagram.Fig. 5 is the sheet laser neodymium glass overall dimension shaping of the embodiment of the invention 1 and the logical light face structural representation after precise polished.The present invention suppresses the method for large-size flaky laser neodymium glass amplified spontaneous emission, comprises the following steps:
1. choose the heat absorbing glass that is complementary with described sheet laser neodymium glass, the difference of the thermal coefficient of expansion of the thermal coefficient of expansion of this heat absorbing glass and described sheet laser neodymium glass is less than 2%, and described heat absorbing glass is at the refractive index n of optical maser wavelength
1Greater than the refractive index n of described sheet laser neodymium glass in optical maser wavelength
2, and n
1-n
2=0.0005～0.005; Choose organic adhesive, this organic adhesive and described sheet laser neodymium glass are in the refractive index match of optical maser wavelength, and described organic adhesive is at the refractive index n of optical maser wavelength
3, require to satisfy relational expression: n
2＜n
3＜n
1The laser neodymium glass of present embodiment is at the 1053nm refractive index n
2, heat absorbing glass is at the 1053nm refractive index n
1With organic adhesive at the 1053nm refractive index n
3Be complementary, for example n
1=1.535 and n
2=1.533, n so
3It is suitable matching 1.534.The thermalexpansioncoefficient that heat absorbing glass is 30 ℃-300 ℃
1Thermalexpansioncoefficient with 30 ℃-300 ℃ of laser neodymium glass
2Be complementary, for example α
2=120 * 10
-7, α so
1Match (118～122) * 10
-7Be suitable.
2. the side separately to the periphery of described sheet laser neodymium glass carries out optics processing, the long side 1.1 and the long side 1.2 of sheet laser neodymium glass 1 are carried out optics processing, optics processing reaches 2 grades of fineness requirements and reaches 4 λ evenness requirements, size according to the long side separately of described sheet laser neodymium glass, the heat absorbing glass lath that the apolegamy size adapts, and described heat absorbing glass lath is carried out optics process; Optics processing is carried out on the surface 2.3 and the surface 2.4 of two blocks of heat absorbing glass laths 2, and optics processing reaches 2 grades of fineness requirements and reaches 4 λ evenness requirements.
3. optical flat after the optics processing is carried out on the surface 2.3 of the long side 1.1 of described sheet laser neodymium glass and long side 1.2 and described heat absorbing glass lath and surface 2.4, carry out cleaning processing, and carry out acetic acid treatment and silane coupled processing.Implementing acidic materials handles and coupling agent treatment;
4. use described organic adhesive, described heat absorbing glass lath is closely sticked on the corresponding side of described sheet laser neodymium glass; As shown in Figure 2, the organic adhesive for preparing is coated on laser neodymium glass long side 1.1 and long side 1.2, heat absorbing glass surface 2.3 and surface 2.4, carries out bonding, curing.
5. as shown in Figure 3, two short sides 1.5 and 1.6 of the sheet laser neodymium glass 1 of the bonding heat absorbing glass of described two long sides are carried out optics processing, optics processing reaches 2 grades of fineness requirements and reaches 4 λ evenness requirements, corresponding, optics processing is carried out on the surface 3.7 and the surface 3.8 of heat absorbing glass lath 3, and optics processing reaches 2 grades of fineness requirements and reaches 4 λ evenness requirements.The side of described sheet laser neodymium glass not being pasted as yet the heat absorbing glass lath carries out optics processing one by one, the size of not pasting the side of heat absorbing glass lath as yet according to described sheet laser neodymium glass, be equipped with the heat absorbing glass lath that size adapts, described heat absorbing glass lath is carried out optics processing;
6. described sheet laser neodymium glass and described heat absorbing glass lath are carried out optical flat after the optics processing, implementing acidic materials handles and coupling agent treatment, the short side 1.5 of laser neodymium glass carries out cleaning with short side 1.6, heat absorbing glass surface 3.7 and surface 3.8 to be handled, and carries out acetic acid treatment and silane coupler processing;
7. as shown in Figure 4, the organic adhesive for preparing is coated on laser neodymium glass weak point side 1.5 and short side 1.6, heat absorbing glass surface 3.7 and surface 3.8, carries out bonding, curing.
8. as shown in Figure 5, the laser neodymium glass of the bonding heat absorbing glass of four side is carried out the external dimensions shaping, the logical light face of the laser neodymium glass of described bonding heat absorbing glass is carried out precise polished, see through wavefront distortion and reach or, promptly can be used as the laser amplifier material less than λ/4.
Described heat absorbing glass is the phosphate glass of doping cupric oxide, and the percentage by weight of this heat absorbing glass doping cupric oxide is 1%.
Described organic adhesive non-volatility component in solidification process produces; Described organic adhesive cubical contraction in solidification process is lower than 7%.
Described coupling agent is a silane coupler, described coupling agent treatment is that described silane coupler or titanate coupling agent are dissolved in the acetic acid,diluted, and the optical surface that needs are handled is immersed in the acid solution of described silane coupler or titanate coupling agent and handles.
Described acidic materials are acetate, the compound concentration 0.2mol/L of this acetate, the optical flat of described neodymium glass side of immersion treatment and described heat absorbing glass lath.
The vertical plane of the logical light face of the side of described laser neodymium glass and this laser neodymium glass has 1 ° of inclination angle, and the inclination angle of opposite flank is parallel to each other.
Described organic adhesive in the process that is applied to the laser neodymium glass bound edge, need to detect the refractive index after described organic adhesive solidifies, should with described laser neodymium glass refractive index match.
Embodiment 2:
The shape of present embodiment and implementation step are with embodiment 1, and difference is:
Described heat absorbing glass is the phosphate glass of doping cupric oxide, and the percentage by weight of this heat absorbing glass doping cupric oxide is 0.5%.
The overall dimension of described heat absorbing glass lath, length direction than the long 2mm of described laser neodymium glass side or more than, described heat absorbing glass Width than the wide 1mm of described laser neodymium glass thickness or more than.Handle described optical flat with acid solution, move to and carry out coupling processing in the dust free room, cleaning, dry back beamhouse operation.Described organic adhesive is handled through decompress filter, removes the tiny solid matter in the organic adhesive.Using described organic adhesive closely bonds described heat absorbing glass at described laser neodymium glass side.Control the thickness of described organic adhesive layer.
Described coupling agent is a titanate coupling agent, described coupling agent treatment is that described silane coupler or titanate coupling agent are dissolved in the acetic acid,diluted, and the optical surface that needs are handled is immersed in the acid solution of described silane coupler or titanate coupling agent and handles.
The vertical plane of the logical light face of the side of described laser neodymium glass and this laser neodymium glass has 4 ° inclination angle, and the inclination angle of opposite flank is parallel to each other.
Embodiment 3: octagon sheet laser neodymium glass suppresses the method for amplified spontaneous emission
See also Fig. 6 to Fig. 9, Fig. 6 is present embodiment 3 octagon sheet laser neodymium glass four hypotenuses and heat absorbing glass lath configuration schematic diagram.Fig. 7 is four hypotenuses of present embodiment 3 octagon sheet laser neodymium glass and the structural representation after the stickup of heat absorbing glass lath.Fig. 8 is present embodiment 3 octagon sheet laser neodymium glass four straight flanges and heat absorbing glass lath configuration schematic diagram.Fig. 9 is present embodiment 3 octagon sheet laser neodymium glass overall dimension shapings and the logical light face structural representation after precise polished.
Choose the heat absorbing glass and the organic adhesive that mate with laser neodymium glass, with embodiment 1.Described heat absorbing glass doping oxidation weight of copper percentage is 0.1%.
As shown in Figure 6, optics processing is carried out on the oblique side 4.1～oblique side 4.4 of laser neodymium glass 4, the surface 5.5～surface 5.8 of heat absorbing glass 5, the optics processing request is identical with embodiment 1, optical surface processing, bonding identical with embodiment 1.As shown in Figure 7, the organic adhesive for preparing is coated on the oblique side 4.1～oblique side 4.4 of laser neodymium glass 4, the surface 5.5～surface 5.8 of heat absorbing glass lath 5, carries out bonding, curing.As shown in Figure 8, the laser neodymium glass of the bonding heat absorbing glass in four limits, straight sided 4.9～the straight sided 4.12 of laser neodymium glass 4 is carried out optics processing, corresponding, optics processing is carried out on the surface 6.13～surface 6.16 of heat absorbing glass 6, the optics processing request is identical with embodiment 1, optical surface processing, bonding identical with embodiment 1.As shown in Figure 9, the laser neodymium glass of the bonding heat absorbing glass of side is carried out the external dimensions shaping, the logical light face of laser neodymium glass of described bonding heat absorbing glass is carried out precise polished, see through that wavefront distortion reaches or less than λ/4.
In the present embodiment, the vertical plane of the logical light face of the side of described laser neodymium glass and this laser neodymium glass has 2 ° inclination angle, and the inclination angle of opposite flank is parallel to each other.
Embodiment 4:
The structure of present embodiment and step are with embodiment 3.
Choose with the heat absorbing glass of laser neodymium glass coupling and organic adhesive with embodiment 1.Described heat absorbing glass doping oxidation weight of copper percentage is 1%.
As shown in Figure 6, optics processing is carried out on the side 4.1～side 4.4 of laser neodymium glass 4, the surface 5.5 of heat absorbing glass 5～surface 5.8, the optics processing request is identical with embodiment 1, and optical surface carries out cleaning to be handled, bonding identical with embodiment 1.As shown in Figure 7, the organic adhesive for preparing is coated on the side 4.1～side 4.4 of laser neodymium glass 4, the surface 5.5 of heat absorbing glass 5～surface 5.8, carries out bonding, curing.As shown in Figure 8, the laser neodymium glass of the bonding heat absorbing glass in four limits, side 4.9～side 4.12 to laser neodymium glass 4 carries out optics processing, corresponding, optics processing is carried out on the surface 6.13～surface 6.16 of heat absorbing glass 6, the optics processing request is identical with embodiment 1, and optical surface carries out cleaning to be handled, bonding identical with embodiment 1.As shown in Figure 9, the laser neodymium glass of the bonding heat absorbing glass of side is carried out the external dimensions shaping, the logical light face of laser neodymium glass of described bonding heat absorbing glass is carried out precise polished, see through that wavefront distortion reaches or less than λ/4.
The vertical plane of the logical light face of the side of the laser neodymium glass described in the present embodiment and this laser neodymium glass does not have the inclination angle.
Experiment shows that the inventive method can suppress amplified spontaneous emission of large-size flaky laser neodymium glass and parasitic oscillation effectively, and gain performance satisfies the instructions for use of device of high power laser near the Theoretical Calculation level.
Last illustrated be that above embodiment only is used to illustrate technical scheme of the present invention and unrestricted.Although the present invention is had been described in detail with reference to most preferred embodiment, those skilled in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not breaking away from the spirit and scope of technical solution of the present invention, it all should be encompassed in the claim scope of the present invention.
Claims (4)
1. a method that suppresses the amplified spontaneous emission of large-size flaky laser neodymium glass is characterized in that this method comprises the following steps:
(1) choose heat absorbing glass and the organic adhesive that is complementary with described sheet laser neodymium glass: the difference of the thermal coefficient of expansion of the thermal coefficient of expansion of this heat absorbing glass and described sheet laser neodymium glass is less than 2%, and described heat absorbing glass is at the refractive index n of optical maser wavelength
1Greater than the refractive index n of described sheet laser neodymium glass in optical maser wavelength
2, and n
1-n
2=0.0005～0.005; Choose organic adhesive, this organic adhesive and described sheet laser neodymium glass are in the refractive index match of optical maser wavelength, and described organic adhesive is at the refractive index n of optical maser wavelength
3, require to satisfy relational expression: n
2＜n
3＜n
1
(2) processing and the stickup of described sheet laser neodymium glass and heat absorbing glass lath: the heat absorbing glass lath that the periphery of described sheet laser neodymium glass apolegamy size is adapted also carries out optics processing, after treatment, use described organic adhesive, described heat absorbing glass lath is closely sticked on the periphery of described sheet laser neodymium glass, comprises following concrete steps:
1. the side separately to the periphery of described sheet laser neodymium glass carries out optics processing, size according to the side separately of described sheet laser neodymium glass, the heat absorbing glass lath that the apolegamy size adapts, described heat absorbing glass is the phosphate glass of doping cupric oxide, the percentage by weight of the cupric oxide that wherein mixes is 0.1%～1%, described heat absorbing glass lath is carried out optics processing, the requirement on machining accuracy of the optical flat that described laser glass side and described heat absorbing glass lath are pasted mutually reaches fineness more than 2 grades, and evenness reaches or is better than 4 λ;
2. described sheet laser neodymium glass and described heat absorbing glass lath are carried out optical flat after the optics processing, implementing acidic materials handles and coupling agent treatment, described acidic materials are acetate, the compound concentration 0.2mol/L of this acetate, the optical flat of described neodymium glass side of immersion treatment and described heat absorbing glass lath;
3. use described organic adhesive, described heat absorbing glass lath is closely sticked on the corresponding side of described sheet laser neodymium glass;
4. the side that described sheet laser neodymium glass is not pasted the heat absorbing glass lath as yet carries out optics processing one by one, the size of not pasting the side of heat absorbing glass lath as yet according to described sheet laser neodymium glass, be equipped with the heat absorbing glass lath that size adapts, described heat absorbing glass lath is carried out optics processing;
5. described sheet laser neodymium glass and described heat absorbing glass lath are carried out optical flat after the optics processing, implement acidic materials and handle and coupling agent treatment;
6. use described organic adhesive, described heat absorbing glass lath is closely sticked on the corresponding side of described sheet laser neodymium glass;
(3) the logical light face of sheet laser neodymium glass carries out precise polished: the sheet laser neodymium glass of periphery all having been pasted described heat absorbing glass lath carries out the external dimensions shaping, and the logical light face of described sheet laser neodymium glass is carried out precise polished and reaches designing requirement.
2. the method for inhibition large-size flaky laser neodymium glass according to claim 1 amplified spontaneous emission is characterized in that: described organic adhesive non-volatility component in solidification process produces; Described organic adhesive cubical contraction in solidification process is lower than 7%.
3. the method for inhibition large-size flaky laser neodymium glass according to claim 1 amplified spontaneous emission, it is characterized in that: described coupling agent is silane coupler or titanate coupling agent, described coupling agent treatment is that described silane coupler or titanate coupling agent are dissolved in the acetic acid,diluted, and the optical surface that needs are handled is immersed in the acid solution of described silane coupler or in the acid solution of titanate coupling agent and handles.
4. the method for inhibition large-size flaky laser neodymium glass according to claim 1 amplified spontaneous emission, it is characterized in that: the vertical plane of the logical light face of the side of described laser neodymium glass and this laser neodymium glass has 1 °～4 ° inclination angle, and the inclination angle of opposite flank is parallel to each other.
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| CN102768202A (en) * | 2012-07-26 | 2012-11-07 | 中国科学院上海光学精密机械研究所 | Detecting device and detecting method for residual reflection of covered edges of large-size neodymium glass with covered edges |
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