CN102902025A - Light receiving subassembly - Google Patents
Light receiving subassembly Download PDFInfo
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- CN102902025A CN102902025A CN2012104280638A CN201210428063A CN102902025A CN 102902025 A CN102902025 A CN 102902025A CN 2012104280638 A CN2012104280638 A CN 2012104280638A CN 201210428063 A CN201210428063 A CN 201210428063A CN 102902025 A CN102902025 A CN 102902025A
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- optical fiber
- optical
- filling block
- light
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Abstract
The invention discloses an optical subassembly for receiving optical module signals. The light receiving subassembly comprises an optical fiber connecting sleeve for connecting optical fibers, wherein the optical fiber connecting sleeve is provided with a through hole; and a filling block made of an optical transparent material is arranged at the through hole and is matched with the through hole. According to the light receiving subassembly, the filling block made of the transparent material is arranged at the through hole of the optical fiber connecting sleeve, light passes through the filling block and is transmitted to the air, the refractive index of the filling block is close to that of an optical fiber, the reflectivity of the light back to the optical fibers through an optical interface where the filling block is contacted with the optical fiber is low, namely the optical energy returning to the optical fiber is reduced, and the optical communication quality is improved.
Description
Technical field
The present invention relates to fiber optic communication field, particularly a kind of optical module light signal receives the subcombination for optical of usefulness.
Background technology
The effect of light-receiving sub-assembly is to receive the light signal, and the light signal that will receive is converted to electric signal.The structure of light-receiving sub-assembly commonly used comprises photodiode 11, coupled lens 12 as shown in Figure 1 at present, optical fiber adapter sleeve 16, optical fiber 14 is arranged in the optical fiber adapter sleeve 16, and optical fiber adapter sleeve 16 is provided with through hole, so that the light signal can be smoothly by entering the light-receiving sub-assembly.Light signal 17 in the optical fiber 14 transfers in the air 13 through this through hole, through coupled lens 12 light signal is coupled to photodiode 11 again.Be delivered to occasion in the air 13 via optical fiber transmission at light signal 17, learnt by the equational calculating of Fresnel ' s, the optical interface 15 that 96% the luminous energy 18 of can having an appointment can penetrate optical fiber enters in the air 13, (luminous energy 19 14.4dB) is reflected back toward optical fiber 14 inside, affects the optical communication system signal quality and have approximately 4%.
Summary of the invention
The object of the invention is to overcome in the prior art existing because part optical signals is reflected back the deficiency that optical fiber affects the optical communication quality, a kind of optical module that can improve the optical communication quality is provided, and the optical module that uses this optical module.
In order to realize the foregoing invention purpose, the invention provides following technical scheme:
A kind of light-receiving sub-assembly comprises that for the optical fiber adapter sleeve that connects optical fiber be provided with through hole on the described optical fiber adapter sleeve, described through hole is provided with the filling block of being made by optically transparent material, and described filling block and described through hole are suitable.
Preferably, the optical interface that contacts with optical fiber of described filling block is protruding sphere.
Preferably, to deviate from the optical interface of optical fiber be the inclined-plane to described filling block.
Preferably, described filling block and optical fiber adapter sleeve injection moulding integrated molding.
Compared with prior art, beneficial effect of the present invention: light-receiving sub-assembly of the present invention, the through hole of optical fiber adapter sleeve is provided with the filling block of being made by optically transparent material, light is injected in the air through behind the filling block again, the refractive index of filling block is near optical fibre refractivity, the reflectivity that the optical interface that light contacts with optical fiber through filling block is reflected back optical fiber is low, namely reduce the luminous energy that is back to optical fiber, improved the optical communication quality.
Description of drawings:
Fig. 1 is the structural representation of prior art light-receiving sub-assembly.
Fig. 2 is the embodiment of the invention 1 light-receiving sub-assembly structural representation.
Fig. 3 is the embodiment of the invention 2 light-receiving sub-assembly structural representations.
Fig. 4 is the embodiment of the invention 3 light-receiving sub-assembly structural representations.
Fig. 5 is that light moves towards synoptic diagram between optical fiber, filling block and air.
Mark among the figure: 1-optical fiber adapter sleeve, 2-optical fiber, 3-filling block, 4-the first optical interface, 5-the second optical interface.
Embodiment
The present invention is described in further detail below in conjunction with test example and embodiment.But this should be interpreted as that the scope of the above-mentioned theme of the present invention only limits to following embodiment, all technology that realizes based on content of the present invention all belong to scope of the present invention.
With reference to figure 5, the refractive index of establishing air is n2, n2=1, light is injected the air from optical fiber, the refractive index of optical fiber is n1, n1=1.467 then, according to Fresnel ' s equation as can be known, optical fiber to the reflectivity R=0.0358(of air corresponding to RL be-14.4dB).The filling block of being made by optically transparent material is set between air and optical fiber, light is injected this filling block from optical fiber, the refractive index of this filling block is n3, n3=1.63, at this moment, optical fiber to the reflectivity R1=0.0028(of filling block corresponding to RL be-25.5dB), R1=0.0028＜R=0.0358 is so light signal greatly reduces through the luminous energy of filling block back reflection back into optical fibers.Light is injected the air from filling block again, filling block to the reflectivity R2=0.0574(of air corresponding to RL be-12.4dB).Although enter and understand some when luminous energy behind the filling block deviates from the optical interface of optical fiber through filling block and be reflected back filling block, but because the characteristic of dispersing of light beam, the luminous energy that the optical interface that light deviates from optical fiber from filling block is reflected back optical fiber seldom can effectively reduce the luminous energy that is reflected back optical fiber so the filling block of being made by optically transparent material is set between optical fiber and air.Light-receiving sub-assembly of the present invention is exactly to utilize the filling block of being made by optical material to reach the purpose that reduces the luminous energy that is reflected back optical fiber.
The selection of optically transparent material is to be advisable greater than 90% with wave band 1260～1650nm penetrance in optical communication.More near optical fiber, optical fiber is less to the reflectivity of optically transparent material filling block in the refractive index of wavelength 1260～1650nm for optically transparent material, and light signal is lower through the luminous energy of filling block back reflection back into optical fibers, and the fiber-optic signal laser propagation effect is better.
With reference to figure 2, the light-receiving sub-assembly of enumerating in the present embodiment comprises photodiode, coupled lens, optical fiber adapter sleeve 1, be provided with through hole on the described optical fiber adapter sleeve 1, described through hole is provided with filling block 3, and described filling block 3 is made by optically transparent material, filling block 3 is suitable with described through hole, and namely filling block 3 is realized seamless filled with optical fiber adapter sleeve 1.More excellent, filling block 3 and optical fiber adapter sleeve 1 injection moulding integrated molding, saved the operation of assembling filling block 3 with optical fiber adapter sleeve 1, and avoided being back to because of the reduction luminous energy that the displacement between filling block 3 and the optical fiber adapter sleeve 1 causes the poor effect of optical fiber, in addition, filling block 3 and optical fiber adapter sleeve 1 injection moulding integrated molding are made simple.
The optical interface that filling block 3 contacts with optical fiber is the first optical interface 4, and the optical interface that described filling block 3 deviates from optical fiber is the second optical interface 5.The through hole of optical fiber adapter sleeve 1 is provided with the filling block 3 of being made by transparent material, the refractive index of filling block 3 is near the refractive index of optical fiber, can reduce the reflectivity of the first optical interface 4, simultaneously, light signal out has certain angle of divergence afterwards from optical fiber, when entering the second optical interface 5 via the first optical interface 4, the luminous energy ratio that the second optical interface 5 is reflected back optical fiber also can effectively reduce, so filling block 3 can effectively reduce the luminous energy that is back to optical fiber, improve the optical communication quality.
With reference to figure 3, the light-receiving sub-assembly of enumerating in the present embodiment comprises photodiode, coupled lens, optical fiber adapter sleeve 1, be provided with through hole on the described optical fiber adapter sleeve 1, described through hole is provided with filling block 3, described filling block 3 is made by optically transparent material, filling block 3 and optical fiber adapter sleeve 1 injection moulding integrated molding, the optical interface that filling block 3 contacts with optical fiber 2 is the first optical interface 4, described the first optical interface 4 is protruding sphere, so that optical fiber 2 is that salient point contacts with salient point with contacting of the first optical interface 4, make (have air to exist in the middle of the gapped expression, can reduce transfer efficiency and increase reflectivity) very close to each other between optical fiber 2 and the filling block 3 like this, reach optical fiber 2 and filling block 3 Best link states, improve the optical signal transmission effect.
With reference to figure 4, the structure of the light-receiving sub-assembly of enumerating in the present embodiment is described with embodiment 2, and its difference is that the optical interface that described filling block deviates from optical fiber is the second optical interface 5, and described the second optical interface 5 is the inclined-plane.Light signal can further reduce the luminous energy that is reflected back optical fiber via the second optical interface 5 reflections that are the inclined-plane.
Claims (5)
1. a light-receiving sub-assembly comprises for the optical fiber adapter sleeve that connects optical fiber, is provided with through hole on the described optical fiber adapter sleeve, it is characterized in that described through hole is provided with the filling block of being made by optically transparent material, and described filling block and described through hole are suitable.
2. light-receiving sub-assembly according to claim 1 is characterized in that, the optical interface that described filling block contacts with optical fiber is protruding sphere.
3. light-receiving sub-assembly according to claim 1 and 2 is characterized in that, the optical interface that described filling block deviates from optical fiber is the inclined-plane.
4. light-receiving sub-assembly according to claim 1 and 2 is characterized in that, described filling block and optical fiber adapter sleeve injection moulding integrated molding.
5. light-receiving sub-assembly according to claim 3 is characterized in that, described filling block and optical fiber adapter sleeve injection moulding integrated molding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104280638A CN102902025A (en) | 2012-10-31 | 2012-10-31 | Light receiving subassembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104280638A CN102902025A (en) | 2012-10-31 | 2012-10-31 | Light receiving subassembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102902025A true CN102902025A (en) | 2013-01-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012104280638A Pending CN102902025A (en) | 2012-10-31 | 2012-10-31 | Light receiving subassembly |
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| CN (1) | CN102902025A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106646780A (en) * | 2016-01-11 | 2017-05-10 | 青岛光路光电科技有限公司 | Optical fiber interface assembly and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5274723A (en) * | 1991-09-25 | 1993-12-28 | Nec Corporation | Optical receptacle |
| US20010004414A1 (en) * | 1999-12-13 | 2001-06-21 | Gerhard Kuhn | Coupling configuration |
| US20030091304A1 (en) * | 2001-05-17 | 2003-05-15 | Ichiro Tonai | Optical part, optical module sleeve, optical receiving module, optical communication module, and method of making optical part |
| US20060018609A1 (en) * | 2004-07-26 | 2006-01-26 | Fuji Photo Film Co., Ltd. | Laser module with sealed package containing limited optical components |
| US20060275000A1 (en) * | 2005-03-11 | 2006-12-07 | Avision Inc. | Optical subassembly |
-
2012
- 2012-10-31 CN CN2012104280638A patent/CN102902025A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5274723A (en) * | 1991-09-25 | 1993-12-28 | Nec Corporation | Optical receptacle |
| US20010004414A1 (en) * | 1999-12-13 | 2001-06-21 | Gerhard Kuhn | Coupling configuration |
| US20030091304A1 (en) * | 2001-05-17 | 2003-05-15 | Ichiro Tonai | Optical part, optical module sleeve, optical receiving module, optical communication module, and method of making optical part |
| US20060018609A1 (en) * | 2004-07-26 | 2006-01-26 | Fuji Photo Film Co., Ltd. | Laser module with sealed package containing limited optical components |
| US20060275000A1 (en) * | 2005-03-11 | 2006-12-07 | Avision Inc. | Optical subassembly |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106646780A (en) * | 2016-01-11 | 2017-05-10 | 青岛光路光电科技有限公司 | Optical fiber interface assembly and preparation method thereof |
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Application publication date: 20130130 |