CN220894582U - Optical structure capable of increasing return loss - Google Patents
Optical structure capable of increasing return loss Download PDFInfo
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- CN220894582U CN220894582U CN202322515990.XU CN202322515990U CN220894582U CN 220894582 U CN220894582 U CN 220894582U CN 202322515990 U CN202322515990 U CN 202322515990U CN 220894582 U CN220894582 U CN 220894582U
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- return loss
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- 239000013307 optical fiber Substances 0.000 claims abstract description 44
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- 238000000576 coating method Methods 0.000 description 2
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- Optical Couplings Of Light Guides (AREA)
Abstract
The utility model discloses an optical structure capable of increasing return loss, which comprises a light-transmitting main body and a plurality of optical fibers arranged side by side, wherein a plurality of jacks arranged side by side are formed in the light-transmitting main body, the optical fibers are inserted in the jacks in a one-to-one correspondence manner, the front ends of the optical fibers are provided with inclined end faces, the inclined end faces incline at preset angles relative to the vertical faces, reflecting faces arranged in the light-transmitting main body in a way of being aligned with the inclined end faces are arranged in the light-transmitting main body, an avoidance opening is formed in the bottom of the front end of the light-transmitting main body and used for accommodating an optical communication chip, a plurality of focusing lenses in one-to-one correspondence with the optical fibers are arranged on the top wall of the avoidance opening, and the focusing lenses are positioned below the reflecting faces and reflect light signals emitted from the front ends of the optical fibers to the optical communication chip through the focusing lenses. The utility model can improve the return loss of the optical signal, reduce the error rate, and has simple structure, easy manufacture and cost saving.
Description
Technical Field
The present utility model relates to optical communication devices, and more particularly, to an optical structure capable of increasing return loss.
Background
Currently, as shown in fig. 1 and 2, a conventional optical fiber array FA structure in the market needs to compress a plurality of optical fibers by using two pieces of processed glass, then fix the optical fibers by dispensing, and grind an inclined plane to form an optical surface, thereby achieving a total reflection effect, and then couple the optical fibers to a PCBA board. Such structures have mainly the following drawbacks:
1. The return loss of the optical module is small, and a higher error rate is easy to generate, so that the situations of module packet loss, data transmission failure and the like are caused;
2. The structure has higher requirements on the reflectivity of the coating film on the surface of the chip, however, the reflectivity on the surface of the chip cannot be directly measured, which is not beneficial to production control, and in order to ensure that the reflectivity of the chip reaches an ideal range, only a high-precision chip with high price can be selected;
3. The light spot size of the structure is large, so that the coupling tolerance is extremely small, the process requirement is higher, and the production yield is low;
4. when the existing structure is manufactured, two pieces of processed glass are needed to be used for pressing a plurality of optical fibers, then the optical fibers are fixed by dispensing, and then the optical fibers are ground, so that the process is complex and the cost is high.
Disclosure of utility model
The utility model aims to solve the technical problems of improving the return loss of an optical signal, reducing the error rate, having a simple structure, being easy to manufacture and saving cost and being capable of increasing the return loss, aiming at the defects of the prior art.
In order to solve the technical problems, the utility model adopts the following technical scheme.
The utility model provides an optical structure that can increase return loss, its is including printing opacity main part and a plurality of optic fibre that set up side by side, set up a plurality of jacks that set up side by side in the printing opacity main part, a plurality of optic fibre one-to-one are inserted and are located in the jack, the front end of optic fibre is formed with the tilt end face, tilt end face is relative to the tilt preset angle of face, be equipped with in the printing opacity main part with the reflecting surface that the tilt end face set up, the front end bottom of printing opacity main part is equipped with dodges the mouth, dodges and be used for holding optical communication chip in the mouth, dodge the roof of mouth be equipped with a plurality of with optic fibre one-to-one focusing lens, focusing lens is located the below of reflecting surface, the optical signal of optic fibre front end outgoing is through after the reflecting of reflecting surface, again through focusing lens is penetrated to optical communication chip.
Preferably, the included angle between the inclined end surface and the vertical surface is 6-10 degrees.
Preferably, the included angle between the light beam reflected by the reflecting surface and the vertical surface is 6-20 degrees.
Preferably, the focusing lens is an aspherical focusing lens.
Preferably, the rear end of the light-transmitting main body is provided with a glue spraying opening, a plurality of optical fibers all penetrate through the glue spraying opening, and the glue spraying opening is filled with fixed glue.
Preferably, the light-transmitting main body is a main body made of plastic material.
The optical structure capable of increasing return loss disclosed by the utility model is characterized in that in the manufacturing process, firstly, a light-transmitting main body is prefabricated, a plurality of optical fibers are prepared, a plurality of jacks which are arranged side by side are required to be arranged on the light-transmitting main body, a reflecting surface is arranged in the light-transmitting main body, an avoidance port is arranged at the bottom of the front end of the light-transmitting main body, a plurality of focusing lenses are arranged on the top wall of the avoidance port, meanwhile, the front ends of the optical fibers are required to be provided with inclined end faces, in the specific assembly process, the optical fibers are correspondingly inserted into the jacks one by one, the inclined end faces are kept to be inclined by a preset angle relative to the vertical surface, the inclined end faces are arranged in the reflecting surface, a complete optical communication module is formed after the optical fibers are fixed, finally, the avoidance mask is arranged above an optical communication chip, when the front ends of the optical fibers emit optical signals, the optical signals are reflected by the reflecting surface and then are emitted to the optical communication chip through the focusing lenses, specifically, the optical signals emitted by the optical fibers are focused by the focusing lenses to form a certain angle, the optical communication chip is easy to achieve the purposes of reducing the error rate, and the manufacturing cost is easy, and the utility model is easy to achieve, and the purpose of reducing in addition, and the manufacturing cost is easy.
Drawings
FIG. 1 is a schematic perspective view of a conventional optical fiber array FA structure;
FIG. 2 is a schematic cross-sectional view of a conventional fiber array FA;
FIG. 3 is a cross-sectional view of an optical structure of the present utility model;
FIG. 4 is a perspective view of an optical structure according to one embodiment of the present utility model;
Fig. 5 is a perspective view of an optical structure according to another embodiment of the present utility model.
Detailed Description
The utility model is described in more detail below with reference to the drawings and examples.
The utility model discloses an optical structure capable of increasing return loss, referring to fig. 3 and 4, the optical structure comprises a light-transmitting main body 1 and a plurality of optical fibers 2 arranged side by side, wherein a plurality of jacks 3 arranged side by side are arranged on the light-transmitting main body 1, the optical fibers 2 are inserted into the jacks 3 in a one-to-one correspondence manner, the front ends of the optical fibers 2 are provided with inclined end faces 20, the inclined end faces 20 incline at a preset angle (incline upwards or incline downwards) relative to the vertical faces, a reflecting face 10 aligned with the inclined end faces 20 is arranged in the light-transmitting main body 1, an avoidance opening 11 is arranged at the bottom of the front end of the light-transmitting main body 1, an optical communication chip 4 is accommodated in the avoidance opening 11, a plurality of focusing lenses 12 which are in one-to-one correspondence with the optical fibers 2 are arranged on the top wall of the avoidance opening 11, the focusing lenses 12 are positioned below the reflecting face 10, and optical signals emitted from the front ends of the optical fibers 2 are reflected by the reflecting face 10 and then emitted to the optical communication chip 4 by the focusing lenses 12.
In the manufacturing process, the light-transmitting main body 1 is prefabricated and a plurality of optical fibers 2 are prepared, the light-transmitting main body 1 is required to be provided with a plurality of jacks 3 which are arranged side by side, the light-transmitting main body 1 is internally provided with a reflecting surface 10, the bottom of the front end of the light-transmitting main body 1 is provided with an avoidance port 11, the top wall of the avoidance port 11 is provided with a plurality of focusing lenses 12, meanwhile, the front end of the optical fibers 2 is required to be provided with inclined end surfaces 20, in the specific assembling process, the plurality of optical fibers 2 are inserted in the jacks 3 in a one-to-one correspondence manner, the inclined end surfaces 20 are kept at an inclined preset angle relative to the vertical surface, the inclined end surfaces 20 are aligned with the reflecting surface 10, a complete optical communication module is formed after the plurality of optical fibers 2 are fixed, finally, the avoidance port 11 is covered above the optical communication chip 4, when the front end of the optical fibers 2 is subjected to light signal communication, the light signal is reflected by the reflecting surface 10 and then passes through the focusing lenses 12 to the optical communication chip 4, the emitted light signal is focused by the optical fibers 2, and the optical communication chip is further subjected to the purpose of low-error rate, and the manufacturing cost is easy, and the chip is easy to achieve.
Regarding the preferred angular arrangement of the inclined end face 20, in this embodiment, the angle between the inclined end face 20 and the vertical face is 6 ° to 10 °. In the actual processing process, the end face of the optical fiber is cut into an angle of 6-10 degrees in a laser cutting mode.
In this embodiment, the included angle between the light beam reflected by the reflecting surface 10 and the vertical surface is 6 ° to 20 °, so that the reflected light beam is obliquely emitted to the optical communication chip 4.
Preferably, the focusing lens 12 is an aspherical focusing lens.
In order to sufficiently fix the optical fibers 2, in this embodiment, a glue dispensing opening 13 is provided at the rear end of the light-transmitting body 1, the optical fibers 2 pass through the glue dispensing opening 13, and the glue dispensing opening 13 is filled with a fixing glue 14. Compared with the mode of clamping optical fibers by using two glass sheets in the prior art, the optical fiber fixing device has the advantages that the optical fibers 2 and the light-transmitting main body 1 are adhered and fixed in a mode of beating the fixing glue 14, and the fixing mode is more reliable.
In order to facilitate the manufacturing and shaping and to save the cost, the light-transmitting main body 1 is made of plastic material. Specifically, the plastic material may be a plastic material with high light transmittance.
In practical applications, referring to fig. 4 and 5, specific styles of optical structures of the present utility model include, but are not limited to:
4-core 0.75mm pitch single-mode DR4 optical module;
8 cores 0.5mm pitch single mode DR8 optical module;
12 cores 0.25mm pitch SR4 optical modules (4-receive 4 optical modules);
or 12 cores of SR8 light modules (8-receive 8 light modules, with two integral plastic lenses) with 0.25mm pitch;
or a non-standard design with any core number and any space, and the number of the receiving and transmitting cores is not limited.
On the basis, the utility model also relates to a manufacturing method of the optical structure, which comprises the following steps:
Step S1, prefabricating a light-transmitting main body 1 and preparing a plurality of optical fibers 2, wherein the light-transmitting main body 1 is provided with a plurality of jacks 3 which are arranged side by side, a reflecting surface 10 is arranged in the light-transmitting main body 1, the bottom of the front end of the light-transmitting main body 1 is provided with an avoidance opening 11, the top wall of the avoidance opening 11 is provided with a plurality of focusing lenses 12, and the front end of the optical fibers 2 is provided with an inclined end surface 20;
Step S2, a plurality of optical fibers 2 are inserted into the insertion holes 3 in a one-to-one correspondence manner, the inclined end surface 20 is inclined at a preset angle relative to the vertical surface, and the inclined end surface 20 is aligned with the reflecting surface 10;
Step S3, covering the avoiding port 11 above the optical communication chip 4;
In step S4, when the optical signal is emitted from the front end of the optical fiber 2, the optical signal is reflected by the reflecting surface 10 and then is emitted to the optical communication chip 4 through the focusing lens 12.
In order to fix the optical fiber, in this embodiment, the rear end of the light-transmitting main body 1 is provided with a glue dispensing opening 13, and the manufacturing method further includes a glue dispensing step: the glue dispensing opening 13 is filled with a fixing glue 14, and the fixing glue 14 is used for fixing the optical fibers 2 in the glue dispensing opening 13.
Further, in the step S2, an included angle between the inclined end surface 20 and the vertical surface is 6 ° to 10 °. In the step S1, the light-transmitting body 1 is formed by plastic material, and the focusing lens 12 is an aspheric focusing lens.
The module obtained by the manufacturing method can effectively increase the return loss physically and reduce the error rate of the optical module, meanwhile, the optical path can effectively reduce the requirement on the coating reflectivity of the surface of the PD of the receiving chip, so that the application cost is saved, and furthermore, the optical path structure has small focused light spot size, so that the overall coupling tolerance is large, and in addition, compared with the original product, the optical path structure has unchanged external dimension and can be well compatible with the original product.
The above embodiments are only preferred embodiments of the present utility model, and are not intended to limit the present utility model, and modifications, equivalent substitutions or improvements made within the technical scope of the present utility model should be included in the scope of the present utility model.
Claims (6)
1. The utility model provides an optical structure that can increase return loss, its characterized in that, including printing opacity main part (1) and a plurality of optic fibre (2) that set up side by side, offer a plurality of jack (3) that set up side by side on printing opacity main part (1), a plurality of optic fibre (2) one-to-one are inserted and are located in jack (3), the front end of optic fibre (2) is formed with tilt end face (20), tilt end face (20) relative vertical face slope presets the angle, be equipped with in printing opacity main part (1) with tilt end face (20) alignment setting reflecting surface (10), the front end bottom of printing opacity main part (1) is equipped with dodges mouth (11), dodge mouthful (11) in be used for holding optical communication chip (4), dodge mouthful (11) the roof be equipped with a plurality of with optic fibre (2) one-to-one focusing lens (12), focusing lens (12) are located the below of reflecting surface (10), the light signal of optic fibre (2) front end is through reflecting surface (10) reflection back, focusing lens (12) are penetrated to communication chip.
2. An optical structure for increasing return loss according to claim 1, characterized in that the angle between the inclined end face (20) and the vertical face is 6 ° to 10 °.
3. An optical structure for increasing return loss according to claim 1, characterized in that the angle between the light beam reflected by the reflecting surface (10) and the vertical surface is 6 ° to 20 °.
4. An optical structure for increasing return loss according to claim 1, characterized in that the focusing lens (12) is an aspherical focusing lens.
5. The optical structure capable of increasing return loss according to claim 1, wherein a glue dispensing opening (13) is formed at the rear end of the light-transmitting main body (1), a plurality of optical fibers (2) all penetrate through the glue dispensing opening (13), and fixing glue (14) is filled in the glue dispensing opening (13).
6. An optical structure capable of increasing return loss according to claim 1, characterized in that the light-transmitting body (1) is a plastic body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322515990.XU CN220894582U (en) | 2023-09-15 | 2023-09-15 | Optical structure capable of increasing return loss |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322515990.XU CN220894582U (en) | 2023-09-15 | 2023-09-15 | Optical structure capable of increasing return loss |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220894582U true CN220894582U (en) | 2024-05-03 |
Family
ID=90870886
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322515990.XU Active CN220894582U (en) | 2023-09-15 | 2023-09-15 | Optical structure capable of increasing return loss |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220894582U (en) |
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2023
- 2023-09-15 CN CN202322515990.XU patent/CN220894582U/en active Active
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