CN102819075A - Optical communication assembly and optical communication package module using same - Google Patents
Optical communication assembly and optical communication package module using same Download PDFInfo
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- CN102819075A CN102819075A CN2012103252382A CN201210325238A CN102819075A CN 102819075 A CN102819075 A CN 102819075A CN 2012103252382 A CN2012103252382 A CN 2012103252382A CN 201210325238 A CN201210325238 A CN 201210325238A CN 102819075 A CN102819075 A CN 102819075A
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Abstract
Provided are an optical communication assembly and an optical communication package module using the same. The optical communication assembly comprises a laser diode, an optical waveguide and an optical coupling element, wherein the laser diode is used for emitting a laser, and the optical coupling element is arranged between the laser diode and the optical waveguide and located on a light path of the laser. The optical coupling element comprises a lens body and two plano-convex lenses, wherein the lens body is provided with a light incidence surface and a light emitting surface parallel to the light incidence surface substantially, the light incidence surface and the light emitting surface are flat surfaces, and the plano-convex lenses are respectively arranged on the light incidence surface and the light emitting surface of the lens body.
Description
Technical field
The invention relates to a kind of optical module and use its package module, and particularly relevant for a kind of optical communication module and use its optical communication package module.
Background technology
Along with the progress of science and technology, develop and a kind of optical communication technique.Optical communication technique is to utilize the light behind the modulation (modulation) to carry numerical information, sees through optical fiber (optical fiber) again and comes transmission information.
Fast quite a few times of optical fiber transmission speeds than electronics, and the accuracy rate that optical fiber transmits is also than radio wave height, so optical communication technique has become the important directions in the development in science and technology.
On a kind of optical communication technique, need laser diodes be focused on the optical fiber.Adopt spherical optical coupling element to come laser focusing at present.When the radius of optical coupling element was 250 microns, it was 1980 microns that coupling efficiency is higher than 80% focal length tolerable error.The slope of the change curve of the radius of optical coupling element and focal length tolerable error approximately is 17.4.
Yet the focal length tolerable error only has 1980 microns, in manufacture process, must control the contraposition distance accurately, otherwise will produce high product fraction defective.
Summary of the invention
The present invention is relevant for a kind of optical communication module and use its optical communication package module, and it utilizes the design of optical coupling element to improve the focus error tolerance.
According to one embodiment of the invention, a kind of optical communication module is proposed.Optical communication module comprises a laser diode, an optical waveguide and an optical coupling element.Laser diode is in order to send a laser.Optical coupling element is arranged between laser diode and the optical waveguide and is positioned on the light path of laser.Optical coupling element comprises a phacoid and two plano-convex lenss.Phacoid has a light entrance face and is parallel to a light-emitting face of light entrance face in fact.Light entrance face and light-emitting face are the plane.These a little plano-convex lenss are arranged at the light entrance face and the light-emitting face of phacoid respectively.
According to one embodiment of the invention, a kind of optical communication package module is proposed.The optical communication package module comprises a bearing assembly and an optical communication module.Bearing assembly comprises a base plate, one first assembled plate, one second assembled plate and one the 3rd assembled plate.First assembled plate, second assembled plate and the 3rd assembled plate are arranged on the base plate.Second assembled plate is arranged between first assembled plate and the 3rd assembled plate.Optical communication module comprises a laser diode, an optical waveguide and an optical coupling element.Laser diode is in order to send a laser.Laser diode is arranged on first assembled plate.Optical waveguide is arranged on the 3rd assembled plate.Optical coupling element is arranged on second assembled plate and is positioned on the light path of laser.Optical coupling element comprises a phacoid and two plano-convex lenss.Phacoid has a light entrance face and is parallel to a light-emitting face of light entrance face in fact.Light entrance face and light-emitting face are the plane.These a little plano-convex lenss are arranged at the light entrance face and the light-emitting face of phacoid respectively.
According to one embodiment of the invention, a kind of optical communication module is proposed.Optical communication module comprises a laser diode, an optical waveguide and an optical coupling element.Laser diode is in order to send a laser.Optical coupling element is arranged between laser diode and the optical waveguide and is positioned on the light path of laser.Optical coupling element comprises a phacoid and two plano-convex lenss.Phacoid has a length L and a focal length tolerable error Δ Z.During the length L increment Delta L of phacoid, phacoid has one and upgrades focal length tolerable error Δ Z '.The relational expression of length L, focal length tolerable error Δ Z, increment Delta L and renewal focal length tolerable error Δ Z ' is: Δ Z '=(Δ Z/L) * 250+19.1* Δ L.
For letting the foregoing of the present invention can be more obviously understandable, hereinafter is special lifts various embodiment, and conjunction with figs., elaborates as follows:
Description of drawings
Fig. 1 illustrates the synoptic diagram of optical communication module.
The optical communication module that Fig. 2 illustrates Fig. 1 is arranged at the synoptic diagram of a loading plate.
Fig. 3 illustrates the coupling efficiency of optical communication module and the change curve of focal length.
Fig. 4 illustrates the optical communication module of Fig. 3 at the length of phacoid and the change curve of focal length tolerable error.
Fig. 5 illustrates the synoptic diagram of optical communication package module.
The main element symbol description:
100,200: optical communication module
110: laser diode
120,220: optical coupling element
121,123: plano-convex lens
121a, 123a: connect face
122: phacoid
122a: light entrance face
122b: light-emitting face
130: optical waveguide
130a: receiving plane
300: bearing assembly
310: the first assembled plate
320: the second assembled plate
330: the three assembled plate
340: base plate
900: loading plate
1000: the optical communication package module
C1: predetermined point
L: length
L1: laser
R220: radius
Δ L: increment
Δ Z: focal length tolerable error
Δ Z ': upgrade the focal length tolerable error
Embodiment
Below propose embodiment and be elaborated, embodiment is only in order to as the example explanation, scope that can't limit desire protection of the present invention.In addition, the graphic omission portion of element among the embodiment is with clear demonstration technical characterstic of the present invention.
Please with reference to Fig. 1, it illustrates the synoptic diagram of optical communication module 100.Optical communication module 100 comprises a laser diode 110, an optical waveguide (optical waveguide) 130 and one optical coupling element 120.Laser diode 110 is in order to send a laser L1.Optical waveguide 130 for example is optical fiber (optical fiber), slab guide (planar waveguide) or rectangular waveguide (rectangular waveguide) in order to transmitting optical signal.Optical coupling element 120 is arranged between laser diode 110 and the optical waveguide 130 and is positioned on the light path of laser L1, is coupled to optical waveguide 130 in order to the laser L1 with laser diode 110.The material of optical coupling element 120 for example is quartz or clear plastic.
In a kind of application, can be according to the content control laser diode 110 of a digital communications sign indicating number, to penetrate one group of laser L1 behind the modulation accordingly.After the laser L1 that laser diode 110 penetrates is coupled to optical waveguide 130 through optical coupling element 120, can laser L1 be passed at a distance.Receiver at a distance then can be again with the laser L1 digital communications sign indicating number of oppositely decoding back.
As shown in Figure 1, optical coupling element 120 comprises a phacoid 122 and two plano-convex lenss 121,123.Phacoid 122 has a light entrance face 122a and is parallel to the light-emitting face 122b of light entrance face 122a in fact.Light entrance face 122a and light-emitting face 122b are the plane.These a little plano-convex lenss 121,123 are arranged at the light entrance face 122a and the light-emitting face 122b of phacoid 122 respectively.After laser L1 passes through plano-convex lens 121, phacoid 122 and plano-convex lens 123, will focus on and image in a predetermined point C1.One receiving plane 130a of optical waveguide 130 only needs can receive laser L1 smoothly corresponding to this predetermined point C1.
In one embodiment, this a little plano-convex lens 121,123 is protruding in two reverse directions.Plano-convex lens 121 is protruding in laser diode 110 towards the positive dirction of X axle; 123 negative directions towards the X axle of plano-convex lens are protruding in optical waveguide 130.The surface of plano-convex lens 121,123 can be hemisphere face, a certain proportion of sphere, semiellipse face, a certain proportion of elliptical area or parabola.A certain proportion of sphere for example is 30% sphere.The radius-of-curvature of two plano-convex lenss 121,123 is identical in fact.
Phacoid 122 can be a right cylinder.The area of the area of the light entrance face 122a of phacoid 122 and the face that the connects 121a of plano-convex lens 121 can be identical in fact; The area of the area of the light-emitting face 122b of phacoid 122 and the face that the connects 123a of plano-convex lens 123 can be identical in fact; The laser L1 that makes all get into plano-convex lens 121 all can get into phacoid 122, and all can continue to get into plano-convex lens 123.
In one embodiment, the phacoid 122 of optical coupling element 120 and this a little plano-convex lenss 121,123 are formed in one, with the phenomenon of avoiding phacoid 122 and plano-convex lens 121, forming reflection between 123, reflect.
Please with reference to Fig. 2, its optical communication module 100 that illustrates Fig. 1 is arranged at the synoptic diagram of a loading plate 900.One group of optical communication module 100 is arranged at 900 last times of loading plate; Can laser diode 110, optical coupling element 120 and optical waveguide 130 be arranged on the loading plate 900 along a straight line, and with the central shaft of laser diode 110, the central shaft of optical coupling element 120 and the central shaft alignment of optical waveguide 130.Thus, the laser L1 that laser diode 110 penetrates can inject optical coupling element 120 collimation, and is coupled in the optical waveguide 130.
Please with reference to Fig. 3, it illustrates the coupling efficiency of optical communication module 100 and the change curve of focal length.In one embodiment, the wavelength of the laser L1 of laser diode 110 is that (nanometer, nm), the refractive index of phacoid 120 and plano-convex lens 121,123 is 1.52 to 1550 nanometers.When the length L (being shown in Fig. 1) of phacoid 122 be 250 microns (micrometer, in the time of um), it is 2260 microns that coupling efficiency is higher than 80% focal length tolerable error Δ Z (being shown in Fig. 1); When the length L of phacoid 122 was 300 microns, it was 3150 microns that coupling efficiency is higher than 80% focal length tolerable error Δ Z; When the length L of phacoid 122 was 350 microns, it was 4110 microns that coupling efficiency is higher than 80% focal length tolerable error Δ Z; When the length L of phacoid 122 was 400 microns, it was 5130 microns that coupling efficiency is higher than 80% focal length tolerable error Δ Z.
Please with reference to Fig. 4, it illustrates the increment Delta L and the change curve that upgrade focal length tolerable error Δ Z ' of the optical communication module 100 of Fig. 3 in the length L of phacoid 122.The length L of phacoid 122 increases to the fashionable of length L and increment Delta L, and phacoid 122 has one and upgrades focal length tolerable error Δ Z ', and the relational expression (1) of length L, focal length tolerable error Δ Z, increment Delta L and renewal focal length tolerable error Δ Z ' is:
ΔZ’＝(ΔZ/L)×250+19.1*ΔL.....................(1)
That is to say that the increment Delta L of the length L of phacoid 122 gets over for a long time, upgrading focal length tolerable error Δ Z ' also can be big more.The increment Delta L of the length L of phacoid 122 approximately is 19.1 with the slope of the change curve that upgrades focal length tolerable error Δ Z '.
Compared to known spherical optical coupling element, present embodiment adopts the optical coupling element 120 with phacoid 122 can obtain bigger renewal focal length tolerable error Δ Z '.And the slope of the change curve of the phacoid 122 of present embodiment is bigger, so adopt the increment Delta L increase of the optical coupling element 120 of phacoid 122 along with the length L of phacoid 122, can increase fast and upgrade focal length tolerable error Δ Z '.
Please with reference to Fig. 5, it illustrates the synoptic diagram of optical communication package module 1000.In one embodiment, above-mentioned optical communication module 100 can see through a bearing assembly 300 and be packaged into an optical communication package module 1000.Optical communication package module 1000 comprises bearing assembly 300 and at least one optical communication module 100.In the embodiment of Fig. 7, optical communication package module 1000 is that example is done explanation with 8 optical communication modules 100.
As shown in Figure 5, each laser diode 110 is arranged on first assembled plate 310, and each optical coupling element 120 is arranged on second assembled plate 320, and each optical waveguide 130 is arranged on the 3rd assembled plate 330.Each laser diode 110, each optical coupling element 120 and each optical waveguide 130 are corresponding each other.
First assembled plate 310, second assembled plate 320 and the 3rd assembled plate 330 are in fact perpendicular to base plate 340.And first assembled plate 310, second assembled plate 320 and the 3rd assembled plate 330 are parallel to each other in fact.Thus; As long as the central shaft of each laser diode 110 is perpendicular to first assembled plate 310; The central shaft of each optical coupling element 120 is perpendicular to second assembled plate 320; And the central shaft of each optical waveguide 130 then can make the central shaft of laser diode 110, the central shaft of optical coupling element 120 and the central shaft of optical waveguide 130 be parallel to each other perpendicular to the 3rd assembled plate 330, and is convenient to aim at.
In sum, though the present invention discloses as above with various embodiment, so it is not in order to limit the present invention.Have common knowledge the knowledgeable in the technical field under the present invention, do not breaking away from the spirit and scope of the present invention, when doing various changes and retouching.Therefore, protection scope of the present invention is as the criterion when looking claims person of defining.
Claims (19)
1. optical communication module comprises:
One laser diode is in order to send a laser;
One optical waveguide; And
One optical coupling element is arranged between this laser diode and this optical waveguide and is positioned on the light path of this laser, and this optical coupling element comprises:
One phacoid, this phacoid have a light entrance face and are parallel to a light-emitting face of this light entrance face in fact, and this light entrance face and this light-emitting face are the plane; And
Two plano-convex lenss are arranged at this light entrance face and this light-emitting face of this phacoid respectively.
2. optical communication module as claimed in claim 1, wherein the length of this phacoid is 250～400 microns.
3. optical communication module as claimed in claim 1, wherein those plano-convex lenss are protruding in two reverse directions.
4. optical communication module as claimed in claim 1, wherein this phacoid of this optical coupling element and those plano-convex lenss are formed in one.
5. optical communication module as claimed in claim 1, wherein the radius-of-curvature of those plano-convex lenss is identical in fact.
6. optical communication module as claimed in claim 1, wherein the refractive index of this phacoid and those plano-convex lenss is 1.52.
7. optical communication module as claimed in claim 1, wherein this phacoid is a cylindrical lens body.
8. optical communication module as claimed in claim 1, wherein this optical waveguide is one of them of an optical fiber, a slab guide and a rectangular waveguide.
9. optical communication package module comprises:
One bearing assembly comprises:
One base plate;
One first assembled plate;
One second assembled plate; And
One the 3rd assembled plate, this first assembled plate, this second assembled plate and the 3rd assembled plate are arranged on this base plate, and this second assembled plate is arranged between this first assembled plate and the 3rd assembled plate; And
One optical communication module comprises:
One laser diode, in order to send a laser, this laser diode is arranged on this first assembled plate;
One optical waveguide is arranged on the 3rd assembled plate; And
One optical coupling element is arranged on this second assembled plate and is positioned on the light path of this laser, and this optical coupling element comprises:
One phacoid, this phacoid have a light entrance face and are parallel to a light-emitting face of this light entrance face in fact, and this light entrance face and this light-emitting face are the plane; And
Two plano-convex lenss are arranged at this light entrance face and this light-emitting face of this phacoid respectively.
10. optical communication package module as claimed in claim 9, wherein this first assembled plate, this second assembled plate and the 3rd assembled plate are in fact perpendicular to this base plate.
11. optical communication package module as claimed in claim 9, wherein this first assembled plate, this second assembled plate and the 3rd assembled plate are parallel to each other in fact.
12. optical communication package module as claimed in claim 9, wherein the length of this phacoid is 250～400 microns.
13. optical communication package module as claimed in claim 9, wherein those plano-convex lenss are protruding in two reverse directions.
14. optical communication package module as claimed in claim 9, wherein this phacoid of this optical coupling element and those plano-convex lenss are formed in one.
15. optical communication package module as claimed in claim 9, wherein the radius-of-curvature of those plano-convex lenss is identical in fact.
16. optical communication package module as claimed in claim 9, wherein the refractive index of this phacoid and those plano-convex lenss is 1.52.
17. optical communication package module as claimed in claim 9, wherein this phacoid is a cylindrical lens body.
18. optical communication package module as claimed in claim 9, wherein this optical waveguide is one of them of an optical fiber, a slab guide and a rectangular waveguide.
19. an optical communication module comprises:
One laser diode is in order to send a laser;
One optical waveguide; And
One optical coupling element is arranged between this laser diode and this optical waveguide and is positioned on the light path of this laser, and this optical coupling element comprises:
Two plano-convex lenss; And
One phacoid; Have a length L and a focal length tolerable error Δ Z; During this length L increment Delta L of this phacoid, this phacoid has one and upgrades focal length tolerable error Δ Z ', and the relational expression of this length L, this focal length tolerable error Δ Z, this increment Delta L and this renewal focal length tolerable error Δ Z ' is:
ΔZ’＝(ΔZ/L)×250+19.1*ΔL。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103252382A CN102819075A (en) | 2012-09-05 | 2012-09-05 | Optical communication assembly and optical communication package module using same |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012103252382A CN102819075A (en) | 2012-09-05 | 2012-09-05 | Optical communication assembly and optical communication package module using same |
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| JPS6259912A (en) * | 1985-09-10 | 1987-03-16 | Matsushita Electric Ind Co Ltd | Large-diameter single lens |
| CN1460872A (en) * | 2002-05-15 | 2003-12-10 | 阿尔卑斯电气株式会社 | Optical transmitting and receiving device |
| CN1497280A (en) * | 2002-10-01 | 2004-05-19 | ��˹���´﹫˾ | Symmetric, double-nonspherical lens used in transmission and reflecting optical fibre component |
| US20050121687A1 (en) * | 2003-12-04 | 2005-06-09 | Nec Compound Semiconductor Devices, Ltd. | Optical semiconductor device |
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| CN101320116A (en) * | 2008-07-22 | 2008-12-10 | 福州高意通讯有限公司 | Optical fiber coupling assembly method of semiconductor laser |
| CN101794004A (en) * | 2010-03-05 | 2010-08-04 | 中国电子科技集团公司第十三研究所 | Lens coupling photocoupler |
| CN102356523A (en) * | 2009-03-18 | 2012-02-15 | 古河电气工业株式会社 | Semiconductor laser module and optical module |
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2012
- 2012-09-05 CN CN2012103252382A patent/CN102819075A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6259912A (en) * | 1985-09-10 | 1987-03-16 | Matsushita Electric Ind Co Ltd | Large-diameter single lens |
| CN1460872A (en) * | 2002-05-15 | 2003-12-10 | 阿尔卑斯电气株式会社 | Optical transmitting and receiving device |
| CN1497280A (en) * | 2002-10-01 | 2004-05-19 | ��˹���´﹫˾ | Symmetric, double-nonspherical lens used in transmission and reflecting optical fibre component |
| US20050121687A1 (en) * | 2003-12-04 | 2005-06-09 | Nec Compound Semiconductor Devices, Ltd. | Optical semiconductor device |
| CN101236282A (en) * | 2008-02-04 | 2008-08-06 | 日月光半导体制造股份有限公司 | Lens module group packaging fixture and its encapsulation method using same |
| CN101320116A (en) * | 2008-07-22 | 2008-12-10 | 福州高意通讯有限公司 | Optical fiber coupling assembly method of semiconductor laser |
| CN102356523A (en) * | 2009-03-18 | 2012-02-15 | 古河电气工业株式会社 | Semiconductor laser module and optical module |
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Application publication date: 20121212 |