CN115494593A - Light-weight optical fiber coupling laser - Google Patents
Light-weight optical fiber coupling laser Download PDFInfo
- Publication number
- CN115494593A CN115494593A CN202211197749.0A CN202211197749A CN115494593A CN 115494593 A CN115494593 A CN 115494593A CN 202211197749 A CN202211197749 A CN 202211197749A CN 115494593 A CN115494593 A CN 115494593A
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- Prior art keywords
- lens
- reflector
- light
- wedge
- positioning block
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 21
- 230000008878 coupling Effects 0.000 title claims abstract description 12
- 238000010168 coupling process Methods 0.000 title claims abstract description 12
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 12
- 239000000835 fiber Substances 0.000 claims abstract description 20
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 13
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims description 13
- 239000011521 glass Substances 0.000 claims description 3
- 238000009434 installation Methods 0.000 description 7
- 239000004065 semiconductor Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 239000000956 alloy Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 239000007888 film coating Substances 0.000 description 2
- 238000009501 film coating Methods 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 229910000833 kovar Inorganic materials 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
- G02B6/4214—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms the intermediate optical element having redirecting reflective means, e.g. mirrors, prisms for deflecting the radiation from horizontal to down- or upward direction toward a device
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4296—Coupling light guides with opto-electronic elements coupling with sources of high radiant energy, e.g. high power lasers, high temperature light sources
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Couplings Of Light Guides (AREA)
Abstract
The invention relates to the field of high-power fiber lasers, in particular to a light-weight fiber coupling laser, which comprises an aluminum shell, wherein a lens assembling plate and a chip positioning block are arranged in the aluminum shell, the lens assembling plate and the chip positioning block are arranged in parallel, a second mounting groove is formed in the lens assembling plate, a first mounting groove is formed in the chip positioning block, the second mounting groove in the lens assembling plate and the first mounting groove in the chip positioning block are respectively in one-to-one correspondence, a wedge-shaped reflector is mounted at one end of the second mounting groove, and a slow-axis collimating lens is mounted at the opening of the second mounting groove; a laser diode and a fast axis collimating lens are arranged in the second open slot, a flat reflector is arranged on the second open slot and matched with the wedge reflector, a reflector or a total reflection function prism is arranged at one end of the lens assembling plate and matched with the flat reflector, and light reflected by the reflector or the total reflection function prism is focused by the focusing lens and then output to the optical fiber; the laser has light structure and small structure.
Description
Technical Field
The invention relates to the field of high-power optical fiber lasers, in particular to a light-weight optical fiber coupling laser.
Background
At present, semiconductor lasers are adopted as pumping sources of high-power optical fiber lasers to realize electric-optical and optical-optical conversion.
At present, a plurality of laser diodes or bars are adopted for beam shaping of a pumping laser suitable for a fiber laser, and a plurality of single-tube lasers are coupled into an optical fiber for pumping. The technical scheme used by the multi-single-tube coupling semiconductor laser comprises the following steps:
1. processing a step array on a metal base;
2. each step has a fixed height difference;
3. welding laser diodes on the stepped array in a welding mode;
4. optically shaping and rearranging the laser diodes with height difference and interval;
5. the rearranged spots are focused into the fiber.
The mode that the metal base is used for cutting and processing the ladder array with the fixed height difference is adopted, the more the number of the ladders is, the larger the total height difference is, and the larger the metal thickness of the highest point position is. The copper simple substance or the alloy with good heat conductivity has high density, and the weight of the product cannot be reduced.
Disclosure of Invention
In order to improve the power-weight ratio, the invention provides a light-weight optical fiber coupling laser, which comprises an aluminum shell, wherein a lens assembling plate and a chip positioning block are installed in the aluminum shell, the lens assembling plate and the chip positioning block are arranged in parallel, one or more second installation grooves with one ends opened and the opening ends close to the chip positioning block are arranged on the lens assembling plate, one or more first installation grooves with two ends opened are respectively arranged on the chip positioning block, the second installation grooves on the lens assembling plate and the first installation grooves on the chip positioning block are respectively in one-to-one correspondence, one ends, which are not opened, of the second installation grooves are used for installing wedge-shaped reflectors, and a slow-axis collimating lens is installed at the opening of the second installation groove and is flush with the lens assembling plate; install laser diode in the first mounting groove, and laser diode installs fast axle collimating lens near the opening of lens mounting plate one side, and every second mounting groove is gone up and is installed dull and stereotyped speculum with the wedge-shaped speculum matching, and the one end of lens mounting plate is installed speculum or total reflection function prism with dull and stereotyped speculum matching, and the light that speculum or total reflection function prism reflect exports optic fibre after passing through focusing lens focus.
Further, when a plurality of second mounting grooves are provided on the lens mounting plate, the distance between the wedge-shaped reflecting mirror and the slow-axis collimating lens in each second mounting groove is different.
Furthermore, the output ends of the reflector, the focusing lens and the optical fiber are positioned on the same straight line and are arranged beside the laser diode and the collimating lens in parallel.
Further, a direct current power supply loads current to the laser diode through a lead, the laser diode starts to emit light, and light beams respectively compress the divergence angles of the light beams of the fast axis and the slow axis through the fast axis collimating mirror and the slow axis collimating mirror; then the light beam passes through a wedge-shaped reflector, and the light beam is vertically deflected upwards by 90 degrees; the light beam is horizontally deflected by 90 degrees through a flat reflector and is emitted to the reflector; while reflecting the light beam from one or more flat mirrors for coupling into the optical fiber through the focusing lens.
Furthermore, a lens assembling plate is adopted when the wedge-shaped reflector and the flat reflector are fixed, and the lens assembling plate is made of kovar alloy, ceramic or other materials with the thermal expansion coefficient similar to that of glass.
Furthermore, a heat sink is arranged at one end of the laser diode electrically connected with the direct current.
Compared with the existing optical fiber coupling semiconductor laser using the step base, the invention has the advantages of more integration, light weight and more engineering application value; in addition, the wedge-shaped reflector and the flat reflector in the invention only need to be coated on the wedge-shaped surface, the appearance structure is simple, the price is low, the product cost can be reduced, and meanwhile, the comb-tooth-shaped lens assembling plate with adaptive thermal expansion is adopted to fix the lens, so that the thermal stability of the product is improved.
Drawings
FIG. 1 is a schematic diagram of a light-weight fiber-coupled laser according to the present invention;
FIG. 2 is a schematic diagram of a light-weight fiber-coupled laser planar array according to the present invention;
FIG. 3 is a schematic diagram of a light-weight fiber coupled laser retrace optical path according to the present invention;
FIG. 4 is a diagram of a light-weight fiber coupled laser according to the present invention;
FIG. 5 is a schematic view of a positioning block of a light-weight fiber-coupled laser chip according to the present invention;
wherein, 1, lead; 2. a heat sink; 3. a laser diode; 4. a fast axis collimating mirror; 5. a slow axis collimating mirror; 6. a wedge-shaped mirror; 7. a flat plate mirror; 8. a mirror; 9. a focusing lens; 10. inserting a pin; 11. an optical fiber; 12. a chip positioning block; 13. a lens assembling plate; 14. an aluminum housing.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a light-weight optical fiber coupling laser, which comprises an aluminum shell, wherein a lens assembling plate and a chip positioning block are arranged in the aluminum shell, the lens assembling plate and the chip positioning block are arranged in parallel, one or more second mounting grooves with one ends opened and the opening ends close to the chip positioning block are arranged on the lens assembling plate, one or more first mounting grooves with two ends opened are respectively arranged on the chip positioning block, the second mounting grooves on the lens assembling plate and the first mounting grooves on the chip positioning block are respectively in one-to-one correspondence, the non-opened ends of the second mounting grooves are used for mounting wedge-shaped reflectors, and a slow-axis collimating lens is mounted at the opening of the second mounting groove and is flush with the lens assembling plate; install laser diode in the first mounting groove, and laser diode installs fast axle collimating lens near the opening of lens mounting plate one side, and match with the wedge-shaped reflector on every second mounting groove and install dull and stereotyped speculum, and the speculum is installed with dull and stereotyped speculum matching in the one end of lens mounting plate, and the light of speculum reflection exports optic fibre after passing through focusing lens focus.
In this embodiment, the light-weight fiber-coupled laser should include an aluminum housing, a laser diode chip, a heat sink, a chip positioning block, a fast axis collimator, a slow axis collimator, a wedge reflector, a flat reflector, a lens assembly plate, a reflector, a focusing mirror, an optical fiber, etc. As shown in fig. 1, light emitted by a semiconductor laser enters an optical fiber for output through a fast axis collimating mirror, a slow axis collimating mirror, a wedge-shaped reflecting mirror, a flat reflecting mirror, a reflecting mirror and a focusing lens; the chips and the heat sink are fixed through comb-tooth-shaped chip positioning blocks, and the chip positioning blocks are as shown in fig. 5, so that the chips have the same distance and all the chips are on the same plane; the comb-tooth-shaped lens assembling plate is made of a material with a thermal expansion coefficient similar to that of a lens material, and the bottom surface of the comb-tooth-shaped lens assembling plate is plated with gold and welded at the bottom of the tube shell; because the lens assembling plate and the glass lens with the same thermal expansion coefficient are adopted, the temperature adaptability of the bonding and fixing part is higher. The bottom plate of the shell is made of silicon-aluminum or aluminum with high thermal conductivity, so that the weight of the laser can be effectively reduced.
The number of semiconductor laser dies of the present invention can vary according to specific requirements, and in this embodiment, as shown in fig. 2, a structure formed by 5 chips is adopted.
The lens mounting plate of this embodiment may be made of other materials having a similar coefficient of thermal expansion to the prism material, and those skilled in the art will select materials having a similar coefficient of thermal expansion based on experience, for example, materials having a coefficient of thermal expansion not exceeding a predetermined threshold, such as ceramic or kovar materials.
As an alternative embodiment, the reflecting mirror may be replaced by a prism having a total reflection function.
As shown in fig. 3, after being collimated by the fast axis collimating mirror and the slow axis collimating mirror, light emitted by the semiconductor laser diode core is reflected and deflected upwards on the film coating surface of the wedge-shaped reflector, and deflected upwards on the film coating surface of the flat reflector in the horizontal direction, and the wedge-shaped reflectors are sequentially staggered by a certain distance so that the back-stage reflected light can pass through. Although other methods using a multi-curved prism can achieve the same effect, the lens needs to be cut and polished for more than 4 times and coated with films for 4 surfaces to achieve the deflection angle, but the wedge-shaped reflector and the flat reflector in the invention only need to be coated with films on the wedge-shaped surface once. Finally, the light beam is deflected by 90 degrees through the reflector so as to reduce the occupied area of the light path of the coupling focusing lens; the optical fiber outlet and the pins are arranged on the same side of the device, so that the device is more compact.
The direct current power supply loads current to the tube core of the laser diode through the lead, the tube core and the heat sink are fixed through the chip positioning block, the tube core starts to emit light at the moment, and light beams firstly pass through the fast axis collimating mirror and the slow axis collimating mirror to respectively compress the divergence angles of the fast axis light beams and the slow axis light beams. Then the light beam passes through a wedge-shaped reflector and is vertically deflected upwards by 90 degrees; and then horizontally deflecting the light beam by 90 degrees through a flat reflector, and emitting the light beam to the reflector. The bottom layers of the chip positioning block and the lens assembling plate are made of gold-plated materials and can be welded inside a gold-plated tube shell firstly; the wedge reflector and the flat reflector are fixed by a lens assembling plate made of a material with a thermal expansion coefficient similar to that of the lens. The reflecting mirror reflects the light beams from the plurality of flat reflecting mirrors simultaneously so as to be coupled into the optical fiber through the focusing lens.
The present embodiment provides a light-weight fiber coupled laser as shown in fig. 4, where the lens assembly plate and the chip positioning block of the laser are respectively provided with 5 second mounting grooves and 5 first mounting grooves, and as shown in the example, the light-weight fiber coupled laser includes an aluminum housing 14, and a lead 1, a laser diode die 3, a heat sink 2, a fast axis collimator 4, a slow axis collimator 5, a chip positioning block 12, a lens assembly plate 13, a wedge-shaped reflector 6, a flat plate reflector 7, a reflector 8, a focusing lens 9, a contact pin 10, and an optical fiber 11 which are mounted in the aluminum housing 14. In an example, in order to improve the optical power, 5 tube cores are selected, namely 5 second mounting grooves and 5 first mounting grooves are set, and correspondingly 5 heat sinks, 5 fast axis collimators, 5 slow axis collimators, 5 wedge-shaped reflectors and 5 flat reflectors are selected; 5 groups of cores are established ties through the gold wire lead wire, and 5 groups of wedge-shaped reflecting mirrors are arranged in a staggered manner in space, avoid light to shelter from, adjust the position of wedge-shaped reflecting mirror in every second mounting groove promptly for the position of the dull and stereotyped reflecting mirror of adaptability installation is ordered in a staggered manner, and every dull and stereotyped reflecting mirror homoenergetic reflects the light beam to the reflecting plate. When current passes through the laser diode cores which are connected in series, the laser diode cores emit laser, the divergence angle of a light beam is compressed through the fast axis collimating mirror and the slow axis collimating mirror, then the light beam is rearranged in front of the reflecting mirror through the wedge-shaped reflecting mirror and the flat reflecting mirror, the rearranged light beam is deflected by 90 degrees through the reflecting mirror to emit to the focusing lens, and the focused light beam is coupled into the optical fiber to be output.
In the description of the present invention, it is to be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "one side", "top", "inner", "outer", "front", "center", "both ends", and the like are used in the orientations and positional relationships indicated in the drawings, which are for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the present invention.
In the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," "fixed," "rotated," and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate agent, and may be used for communicating the inside of two elements or interacting relation of two elements, unless otherwise specifically defined, and the specific meaning of the terms in the present invention can be understood by those skilled in the art according to specific situations.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. A light-weight optical fiber coupling laser is characterized by comprising an aluminum shell, wherein a lens assembling plate and a chip positioning block are installed in the aluminum shell, the lens assembling plate and the chip positioning block are arranged in parallel, one or more second mounting grooves with one ends opened and the opening ends close to the chip positioning block are arranged on the lens assembling plate, one or more first mounting grooves with two ends opened are respectively arranged on the chip positioning block, the second mounting grooves on the lens assembling plate and the first mounting grooves on the chip positioning block are respectively in one-to-one correspondence, one ends, which are not opened, of the second mounting grooves are used for mounting wedge-shaped reflectors, and slow-axis collimating lenses are mounted at the openings of the second mounting grooves and are flush with the lens assembling plate; install laser diode in the first mounting groove, and laser diode installs fast axle collimating lens near the opening of lens mounting plate one side, and every second mounting groove is gone up and is installed dull and stereotyped speculum with the wedge-shaped speculum matching, and the one end of lens mounting plate is installed speculum or total reflection function prism with dull and stereotyped speculum matching, and the light that speculum or total reflection function prism reflect exports optic fibre after passing through focusing lens focus.
2. A light-weight fiber-coupled laser according to claim 1, wherein when the lens mounting plate is provided with a plurality of second mounting grooves, the distance between the wedge-shaped reflecting mirror and the slow-axis collimating lens in each second mounting groove is different.
3. A light-weight fiber-coupled laser as claimed in claim 1, wherein the output ends of the reflector, the focusing lens and the optical fiber are positioned in the same line and juxtaposed to the laser diode and the collimating lens.
4. A light-weight fiber-coupled laser as claimed in claim 1, wherein the dc power supply applies a current to the laser diode through the lead, and when the laser diode starts emitting light, the beam passes through the fast axis collimator and the slow axis collimator to compress the divergence angles of the fast axis and the slow axis, respectively; then the light beam passes through a wedge-shaped reflector and is vertically deflected upwards by 90 degrees; the light beam is horizontally deflected by 90 degrees through a flat reflector and is emitted to the reflector; while reflecting the light beam from one or more flat mirrors for coupling into the fiber through a focusing lens.
5. A light-weight fiber-coupled laser as claimed in claim 1, wherein a lens mounting plate is used for fixing the wedge reflector and the plate reflector, and the material of the lens mounting plate is a material whose thermal expansion coefficient is different from that of the glass material of the lens of the wedge reflector and the plate reflector by no more than a set threshold value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211197749.0A CN115494593B (en) | 2022-09-29 | 2022-09-29 | Light-weight optical fiber coupling laser |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211197749.0A CN115494593B (en) | 2022-09-29 | 2022-09-29 | Light-weight optical fiber coupling laser |
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| Publication Number | Publication Date |
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| CN115494593A true CN115494593A (en) | 2022-12-20 |
| CN115494593B CN115494593B (en) | 2024-07-02 |
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| CN202211197749.0A Active CN115494593B (en) | 2022-09-29 | 2022-09-29 | Light-weight optical fiber coupling laser |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117856029A (en) * | 2024-03-08 | 2024-04-09 | 度亘核芯光电技术(苏州)有限公司 | Semiconductor laser |
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2022
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117856029A (en) * | 2024-03-08 | 2024-04-09 | 度亘核芯光电技术(苏州)有限公司 | Semiconductor laser |
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| CN115494593B (en) | 2024-07-02 |
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