CN218035611U - Tap-PD and optical detection device - Google Patents
Tap-PD and optical detection device Download PDFInfo
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- CN218035611U CN218035611U CN202221618152.4U CN202221618152U CN218035611U CN 218035611 U CN218035611 U CN 218035611U CN 202221618152 U CN202221618152 U CN 202221618152U CN 218035611 U CN218035611 U CN 218035611U
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Abstract
The utility model relates to the field of optical communication, in particular to a Tap-PD and an optical detection device, wherein the Tap-PD comprises an optical fiber collimator, an optical absorption part and a first pipeline; an installation cavity is defined in the first pipeline, an optical fiber collimator and a light absorption piece are arranged in the installation cavity, and one end of the optical fiber collimator is fixed at the end part of the first pipeline; the optical absorption piece penetrates through the optical fiber collimator along the axial direction, a first edge surrounding a circle is arranged at the end part, close to the optical fiber collimator, of the optical absorption piece, and a second edge surrounding a circle is arranged at the other end of the optical absorption piece; the first edge is surrounded with an light inlet and a light outlet, the second edge is surrounded with a light outlet, and a light source output by the optical fiber collimator penetrates through the light inlet and the light outlet; the width of the second edge is greater than the width of the first edge. The light absorption piece with the special shape is matched with the optical fiber collimator, so that stray light is reflected and absorbed for multiple times in the light absorption piece, the interception capability of the light absorption piece on the stray light is improved, and the influence of the stray light on the Tap-PD detection capability is reduced.
Description
Technical Field
The utility model relates to an optical communication field, especially a Tap-PD and optical detection device.
Background
Tap-PD (unidirectional spectral detector) is used in the field of optical communications to detect optical signal intensity, and has a unidirectional optical detection function, i.e. light entering from an output end will be greatly attenuated and only a very small amount of signal will be detected. Stray light is an influencing factor influencing the detection performance of Tap-PD, and the influence of the stray light on an optical instrument can be reduced only to a certain extent at present.
The existing Tap-PD has limited reflection and absorption capacity for stray light, so that the detection capacity of the existing Tap-PD is influenced to a certain extent by residual stray light, and the measurement error of the existing Tap-PD is increased due to excessive stray light.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art's not enough, provide a Tap-PD, solved the great problem of measuring error that current Tap-PD leads to because of stray light ingeniously.
In order to achieve the above purpose, the utility model adopts the following technical proposal:
the utility model provides a Tap-PD, which comprises an optical fiber collimator, a light absorption part and a first pipeline; an installation cavity is defined in the first pipeline, an optical fiber collimator and a light absorption piece are arranged in the installation cavity, and one end of the optical fiber collimator is fixed at the end part of the first pipeline;
the optical absorption piece penetrates through the optical fiber collimator along the axial direction, a first edge surrounding a circle is arranged at the end part, close to the optical fiber collimator, of the optical absorption piece, and a second edge surrounding a circle is arranged at the other end of the optical absorption piece; the first edge is surrounded with an light inlet and a light outlet, the second edge is surrounded with a light outlet, and a light source output by the optical fiber collimator penetrates through the light inlet and the light outlet; the width of the second edge is greater than the width of the first edge.
Optionally, the optical fiber collimator includes a double-fiber-pitch jumper assembly, a green lens, and an optical filter lens; the double-fiber-pitch jumper assembly, the Green lens and the optical filter lens are sequentially arranged in the installation cavity from far to near relative to the light absorption piece.
Optionally, the Tap-PD further comprises a second pipe, and the second pipe is inserted into one end of the first pipe and fixed; the second pipeline is sleeved on the double-fiber-spacing jumper.
Optionally, the dual-fiber-pitch jumper assembly includes a third pipeline and a dual-fiber-pitch jumper, and the third pipeline is inserted into the second pipeline; the third pipeline is sleeved on the double-fiber-spacing jumper.
Optionally, the first pipe and the second pipe are fixed by epoxy resin glue, and the second pipe and the third pipe are fixed by epoxy resin glue.
Optionally, the Tap-PD further includes a photodetector, and the photodetector is disposed at an end of the first pipe away from the optical fiber collimator;
a light source emitted by the double-fiber-spacing jumper is converted into collimated light through the Green lens and then enters the photoelectric detector through the light absorption piece; stray light of the collimated light beam is blocked by the second edge after passing through the optical filter lens and is reflected in the light absorbing member.
Optionally, the aperture of the light inlet and the light outlet is larger than the spot diameter of the output light source of the optical fiber collimator.
Optionally, the material of the first, second and third conduits is a glass tube or a gold-plated tube.
Optionally, the light absorbing member is a black tube.
The utility model also provides a light detection device, include like foretell Tap-PD.
The beneficial effects of the utility model reside in that, compared with the prior art, the utility model discloses a set up the special light absorbing piece of shape and cooperate with fiber collimator for stray light is absorbed through multiple reflection in the light absorbing piece, has improved the interception ability of light absorbing piece to stray light, thereby has reduced stray light to the influence of Tap-PD detectability.
Drawings
The invention will be further explained with reference to the drawings and examples, wherein:
FIG. 1 is a schematic cross-sectional view of a Tap-PD according to the present invention;
fig. 2 is a schematic view of a light path of stray light in the light absorbing member according to the present invention.
In the figure: 110. a fiber collimator; 111. a dual-fiber-pitch jumper assembly; 1111. a third pipeline; 1112. a double-fiber-pitch jumper; 112. a Green lens; 113. an optical filter lens; 120. a light absorbing member; 121. a first edge; 1211. a light inlet; 122. a second edge; 1221. a light outlet; 130. a first conduit; 131. a mounting cavity; 140. a second conduit; 150. a photodetector.
Detailed Description
Tap-PD (unidirectional spectral detector) is used in the field of optical communication to detect the intensity of optical signals, and has a unidirectional optical detection function, i.e. light entering from the output end will be greatly attenuated and only a very small amount of signals will be detected. Stray light is an influencing factor influencing the detection performance of Tap-PD, and the influence of stray light on an optical instrument can be reduced to a certain extent at present.
The existing Tap-PD has limited reflection and absorption capacity for stray light, so that the detection capacity of the existing Tap-PD is influenced to a certain extent by residual stray light, and the measurement error of the existing Tap-PD is increased due to excessive stray light.
The event the utility model provides a Tap-PD through the light absorption spare that sets up special shape, has improved Tap-PD to stray light's reflection absorbing capacity to stray light has been reduced to the influence of Tap-PD testing ability.
The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a Tap-PD provided by the present invention, as shown in fig. 1, the present invention provides a Tap-PD, which includes an optical fiber collimator 110, a light absorbing member 120 and a first pipeline 130; an installation cavity 131 is defined inside the first pipeline 130, the optical fiber collimator 110 and the light absorption member 120 are arranged in the installation cavity 131, and one end of the optical fiber collimator 110 is fixed at the end of the first pipeline 130;
the light absorption piece 120 penetrates through the optical fiber collimator 110 along the axial direction, a first edge 121 surrounding the optical fiber collimator 110 is arranged at the end part of the light absorption piece 120 close to the optical fiber collimator, and a second edge 122 surrounding the optical fiber collimator is arranged at the other end of the light absorption piece 120; the first edge 121 encloses a light inlet/outlet 1211, the second edge 122 encloses a light outlet/outlet 1221, and the light source output by the fiber collimator 110 passes through the light inlet/ outlet 1211 and 1221; the width of the second edge 122 is greater than the width of the first edge 121.
The light source output by the fiber collimator 110 is divided into two parts, the collimated light beam passes through the light inlet 1211 and the light outlet 1221 of the light absorbing member 120 in parallel, the stray light enters the light inlet 1211 at a certain angle, and the stray light is reduced after being reflected and absorbed for a plurality of times on the inner surface of the light absorbing member 120. The width of the second edge 122 is greater than the width of the first edge 121, that is, the height of the light outlet 1221 is greater than the height of the light inlet 1211, so that the remaining stray light is difficult to be emitted from the light outlet 1221, and the remaining stray light is reduced again after being reflected and absorbed by the inner surface of the second edge 122.
Specifically, the optical fiber collimator 110 includes a double-fiber-pitch jumper assembly 111, a green lens 112, an optical filter lens 113; the double-fiber-pitch jumper 1112 assembly, the green lens 112, and the optical filter lens 113 are disposed in the mounting cavity 131 in this order from the far side to the near side with respect to the light absorption member 120.
The double-fiber-pitch jumper, in English, dual Pigtail, is used for inputting optical signals; the GRIN Lens is G-Lens in English and is used for collimating optical signals output by the double-fiber-spacing jumper; an optical Filter lens, filter in english, is used to separate the collimated light beam and the stray light passing through the green lens.
Further, the Tap-PD further includes a second pipe 140, and the second pipe 140 is inserted into one end of the first pipe 130 and fixed; second conduit 140 is mounted over dual-fiber-pitch jumper 1112.
Specifically, dual-fiber-pitch jumper 1112 assembly includes a third conduit 1111 and dual-fiber-pitch jumper 1112, third conduit 1111 being inserted in second conduit 140; third conduit 1111 is disposed over dual-fiber-pitch jumper 1112.
Specifically, the first pipe 130 and the second pipe 140 are fixed by epoxy resin adhesive, and the second pipe 140 and the third pipe 1111 are fixed by epoxy resin adhesive. After connecting all pipelines together through epoxy glue, solidification is handled through high temperature to the rethread, and this kind of gluing technology can further strengthen the connection between each pipeline, has that the bonding is effectual, long service life, the simple, the low in production cost characteristics of production technology.
In an alternative embodiment, tap-PD further comprises a photodetector 150, and photodetector 150 is disposed on an end of first conduit 130 remote from fiber collimator 110;
the light source emitted by the double-fiber-pitch jumper 1112 is converted into collimated light through the green lens 112, and then enters the photoelectric detector 150 through the light absorption piece 120; stray light of the collimated light beam is blocked by the second edge 122 after passing through the optical filter lens 113 and is reflected multiple times within the light absorbing member 120.
Specifically, the apertures of the light inlet 1211 and the light outlet 1221 are larger than the spot diameter of the output light source of the fiber collimator 110. The apertures of the light inlet 1211 and the light outlet hole larger than the spot diameter of the light source can prevent the light path of the collimated light beam from being affected by the light absorbing member 120 while the light absorbing member 120 blocks stray light.
In an alternative embodiment, the material of the first conduit 130, the second conduit 140 and the third conduit 1111 is a glass tube or a gold-plated tube.
The material of the first tube 130, the second tube 140, and the third tube 1111 may be other material having good light transmission performance, such as ceramic, and in the present embodiment, a glass tube or a gold-plated tube having good light transmission performance is preferable.
When the materials of the first pipe 130, the second pipe 140 and the third pipe 1111 are the same, the performance of the product is more stable, and product failure caused by the difference of physicochemical properties of different materials can be avoided.
Specifically, the light absorber 120 is a black pipe member.
The black material has the best light absorption performance compared with materials of other colors, so that the light absorption member 120 adopts a black pipe member to improve the absorption effect of stray light; secondly, the tubular object may be more conformable to the shape of the first conduit 130, better utilizing limited space, facilitating installation.
The basic principle of the light absorbing member 120 for reducing stray light is as follows:
fig. 2 is a schematic diagram of a light path of stray light in the light absorbing member 120 according to the present invention, the light absorbing member 120 has a certain ability of absorbing light, and for convenience of evaluation, the absorption rate of the light absorbing member 120 to light is temporarily determined to be about 80%; as shown in fig. 2, after the stray light is reflected three times in the light absorbing member 120,
^
the ratio of light intensity at the time of emission = (1-80%) 3=0.8%; the ratio of light intensity after single reflection and absorption of stray light is far less than that of light intensity after single reflection and absorption of stray light, = (1-80%) =20%; the stray light is reflected on the light absorbing member 120 having a certain absorption rate a plurality of times, and the light absorbing member 120 exerts a remarkable blocking effect. The number of times of reflection of stray light on the light absorbing member 120 can be changed by adjusting the light exit angle of the collimator and the specific size of the light absorbing member 120, thereby effectively reducing the influence of stray light.
The utility model also provides a light detection device, include like foretell Tap-PD.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention, and the present invention is not limited to the above embodiments. In the scope of the technical idea of the present invention, various modifications and changes can be made, and the ordinary skilled person in the art can make modifications, changes or equivalent substitutions according to the above description, all belong to the protection scope of the present invention.
Claims (10)
1. A Tap-PD is characterized by comprising an optical fiber collimator, an optical absorption piece and a first pipeline; an installation cavity is defined in the first pipeline, the optical fiber collimator and the light absorption piece are arranged in the installation cavity, and one end of the optical fiber collimator is fixed at the end part of the first pipeline;
the optical absorption piece penetrates through the optical fiber collimator along the axial direction, a first edge surrounding a circle is arranged at the end part, close to the optical fiber collimator, of the optical absorption piece, and a second edge surrounding a circle is arranged at the other end of the optical absorption piece; the first edge encloses a light inlet and a light outlet, the second edge encloses a light outlet, and a light source output by the optical fiber collimator penetrates through the light inlet and the light outlet; the width of the second edge is greater than the width of the first edge.
2. The Tap-PD according to claim 1, wherein said fiber collimator comprises a dual-fiber pitch jumper assembly, a green lens, an optical filter lens; the double-fiber-pitch jumper assembly, the Green lens and the optical filtering lens are sequentially arranged in the mounting cavity from far to near relative to the light absorption piece.
3. The Tap-PD according to claim 2, wherein said Tap-PD further comprises a second pipe inserted into one end of said first pipe and fixed; the second pipeline is sleeved on the double-fiber-spacing jumper.
4. The Tap-PD of claim 3 wherein the dual-fiber-pitch jumper assembly comprises a third conduit and a dual-fiber-pitch jumper, the third conduit being inserted in a second conduit; the third pipeline is sleeved on the double-fiber-spacing jumper.
5. The Tap-PD according to claim 4, wherein said first conduit and said second conduit are adhesively secured together by epoxy, and wherein said second conduit and said third conduit are adhesively secured together by epoxy.
6. A Tap-PD according to any one of claims 2 to 5 and further comprising a photodetector disposed on the end of said first conduit remote from said fibre collimator;
a light source emitted by the double-fiber-spacing jumper passes through the light absorption piece and enters the photoelectric detector after being converted into collimated light by the Green lens; stray light of the collimated light beam is blocked by the second edge after passing through the optical filter lens and is reflected in the light absorption member.
7. The Tap-PD according to any one of claims 1 to 5, wherein the apertures of said light entry and said light exit are larger than the spot diameter of the output light source of said fiber collimator.
8. The Tap-PD according to claim 4, wherein the material of said first, second and third conduits is a glass tube or a gold-plated tube.
9. The Tap-PD according to any one of claims 1 to 5, wherein said light absorbing member is a black tube member.
10. An optical detection device comprising a Tap-PD according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221618152.4U CN218035611U (en) | 2022-06-27 | 2022-06-27 | Tap-PD and optical detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221618152.4U CN218035611U (en) | 2022-06-27 | 2022-06-27 | Tap-PD and optical detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218035611U true CN218035611U (en) | 2022-12-13 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221618152.4U Active CN218035611U (en) | 2022-06-27 | 2022-06-27 | Tap-PD and optical detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218035611U (en) |
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2022
- 2022-06-27 CN CN202221618152.4U patent/CN218035611U/en active Active
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Address after: 518000 No. 35, Cuijing Road, Pingshan New District, Shenzhen, Guangdong Patentee after: Ona Technology (Shenzhen) Group Co.,Ltd. Address before: 518000 No. 35, Cuijing Road, Pingshan New District, Shenzhen, Guangdong Patentee before: O-NET COMMUNICATIONS (SHENZHEN) Ltd. |