CN114859470A - Optical path structure and method for increasing return loss and optical device - Google Patents
Optical path structure and method for increasing return loss and optical device Download PDFInfo
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- CN114859470A CN114859470A CN202210545447.1A CN202210545447A CN114859470A CN 114859470 A CN114859470 A CN 114859470A CN 202210545447 A CN202210545447 A CN 202210545447A CN 114859470 A CN114859470 A CN 114859470A
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- 230000003287 optical effect Effects 0.000 title claims abstract description 78
- 238000000034 method Methods 0.000 title claims abstract description 8
- 239000013307 optical fiber Substances 0.000 claims abstract description 55
- 238000003780 insertion Methods 0.000 claims abstract description 16
- 230000037431 insertion Effects 0.000 claims abstract description 16
- 238000001514 detection method Methods 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 3
- 239000000835 fiber Substances 0.000 abstract description 14
- 230000008878 coupling Effects 0.000 abstract description 11
- 238000010168 coupling process Methods 0.000 abstract description 11
- 238000005859 coupling reaction Methods 0.000 abstract description 11
- 238000004891 communication Methods 0.000 description 3
- 239000000306 component Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000002457 bidirectional effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000008358 core component Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
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Classifications
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- 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
- G02B6/26—Optical coupling means
- G02B6/262—Optical details of coupling light into, or out of, or between fibre ends, e.g. special fibre end shapes or associated optical elements
-
- 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
- G02B6/4201—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
- G02B6/4206—Optical features
-
- 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
- G02B6/4215—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms the intermediate optical elements being wavelength selective optical elements, e.g. variable wavelength optical modules or wavelength lockers
-
- 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
- G02B6/4285—Optical modules characterised by a connectorised pigtail
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Couplings Of Light Guides (AREA)
Abstract
The invention relates to an optical path structure, a method and an optical device for increasing return loss, which comprise an optical fiber insertion component, a collimating lens, a converging lens and a PD chip; the optical fiber insertion assembly is provided with an optical fiber channel which is used for transmitting incident light; the outlet of the optical fiber channel is obliquely arranged and faces the collimating lens; the collimating lens is used for converting incident light into collimated light; the converging lens is used for converging collimated light and enabling the collimated light to be incident to the PD chip, the optical axis of the converging lens is parallel to the axis of the PD chip and arranged in an off-axis mode, and an inclined surface is arranged on one side, opposite to the PD chip, of the converging lens. A convergent lens in front of a PD chip is arranged in an off-axis mode and is designed to be a tilted convex lens, off-axis offset of the convergent lens can be small, and coupling efficiency is not affected; and reflected light on the surface of the PD reversely passes through the two lenses and is coupled and mismatched with the fiber core of the optical fiber channel, so that most of the reflected light cannot be coupled into the optical fiber channel, return loss parameters of the optical path are improved, and the performance of the optical device is ensured.
Description
Technical Field
The invention relates to the technical field of optical communication, in particular to an optical path structure, a method and an optical device for increasing return loss.
Background
At present, the optical communication industry enters a rapid development stage, an optical module plays a central role in the optical communication industry, and is widely applied to wireless equipment and transmission equipment, and an optical device is taken as a core component of the optical module and must meet technical indexes of the optical module in different application scenes.
The return loss is an important parameter of the performance of the optical device, and means that when an optical signal is transmitted inside the optical device and meets an optical element, part of the optical signal is reflected back to the transmitting end, thereby causing interference with the operation of the laser or influencing the transmission performance of the optical fiber.
At present, a collimated light path is widely applied to optical devices, and particularly, a single-fiber bidirectional optical device has a small return loss of the light path and does not meet a general return loss index.
Among the prior art, some schemes will receive the slope of optical signal's PD chip and place and increase the return loss, but the difficult control of inclination uniformity has reduced production efficiency, has reduced structural stability, has brought the reliability risk, and coupling efficiency also has certain loss simultaneously. In addition, as shown in chinese patent CN111650701A, a structure and an application for improving return loss are disclosed, in which the off-axis of the focusing lens in front of the PD chip is placed to expect to increase return loss, which seems to be feasible theoretically, but actually, in order to increase return loss, the off-axis offset of the focusing lens in front of the PD chip needs to be larger, which results in a great reduction in coupling efficiency.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a light path structure, a method and an optical device for increasing return loss, wherein a convergent lens in front of a PD chip is arranged in an off-axis manner and is designed into a tilted convex lens, the off-axis offset of the convergent lens can be smaller, and the coupling efficiency is not influenced; incident light is reflected by the surface of the PD chip, and reflected light is mismatched with the fiber core of the optical fiber channel after passing through the two lenses again, so that most of the reflected light cannot be coupled into the optical fiber channel, return loss parameters of a light path are improved, and the performance of an optical device is further ensured.
In order to solve the technical problem, the invention provides an optical path structure for increasing return loss, which comprises an optical fiber insertion component, a collimating lens, a converging lens and a PD chip; the optical fiber insertion assembly is internally provided with an optical fiber channel for transmitting incident light; the outlet of the optical fiber channel is obliquely arranged and faces the collimating lens; the collimating lens is used for converting incident light into collimated light; the converging lens is used for converging the collimated light and enabling the collimated light to be incident to the PD chip, the optical axis of the converging lens is parallel to the axis of the PD chip and is arranged in an off-axis mode, and an inclined surface is arranged on one side, opposite to the PD chip, of the converging lens.
Preferably, the outlet of the optical fiber channel is inclined at an angle of 4-8 °.
Preferably, the inclined surface is inclined at an angle of not more than 10 °.
Preferably, the PD chip is a photodetection chip; the receiving surface of the photoelectric detection chip faces the convergent lens and is used for receiving the optical signal converged by the convergent lens.
Preferably, the filter also comprises a full-anti-wave plate and a filter plate; the full-reflection wave plate is arranged on one side of the collimating lens, which is far away from the optical fiber insertion assembly, and is used for deflecting the collimated light output by the collimating lens; the filter plate is arranged between the full-reflection wave plate and the collimating lens and used for filtering the collimated light after deflection.
Preferably, the collimating lens is a biconvex lens or a plano-convex lens, and the convex surface of the collimating lens is a spherical surface or an aspheric surface.
Preferably, the convex surface of the converging lens is spherical or aspherical.
Preferably, the optical fiber insertion assembly includes a ferrule having the optical fiber passage disposed therein.
A method of increasing return loss, comprising the steps of: s1, emitting incident light, and inputting the incident light to a preset collimating lens; s2, converting the incident light into collimated light based on the collimating lens, and inputting the collimated light to a preset converging lens; s3, converging the collimated light based on the converging lens, and inputting the converged collimated light to a PD chip in an inclined manner; and one part of the collimated light after being converged is absorbed by the PD chip, and the other part of the collimated light is reflected on the surface of the PD chip to form a return loss optical path.
An optical device comprising the above optical path structure for increasing return loss.
Compared with the prior art, the technical scheme of the invention has the following advantages:
the outlet of the optical fiber channel is obliquely arranged and faces the collimating lens, the optical axis of the converging lens is parallel to the axis of the PD chip and is arranged in an off-axis manner, and the inclined surface is arranged on one side of the converging lens, which is opposite to the PD chip. Compared with the prior art, the off-axis offset of the convergent lens can be smaller, and the coupling efficiency is not influenced. Incident light is reflected by the surface of the PD chip, reflected light is not collimated light after reversely passing through the converging lens, and is obviously mismatched with the fiber core of the optical fiber channel when reversely passing through the collimating lens and converging to the end face of the optical fiber channel, so that most of the reflected light cannot be coupled into the optical fiber channel, and the return loss value is increased.
Drawings
In order that the present disclosure may be more readily and clearly understood, reference is now made to the following detailed description of the present disclosure taken in conjunction with the accompanying drawings, in which:
FIG. 1 is a schematic diagram of the optical path structure of the present invention;
FIG. 2 is a schematic diagram of the return loss optical path structure of the present invention;
FIG. 3 is a diagram illustrating a second embodiment of the optical path structure according to the present invention;
fig. 4 is a third schematic view of an embodiment of an optical path structure of the present invention.
The specification reference numbers indicate: the optical fiber coupler comprises a 10-optical fiber insertion component, a 20-collimating lens, a 30-converging lens, a 40-PD chip, a 50-full-reflection wave plate, a 60-filter plate, a 501-second full-reflection wave plate and a 502-first full-reflection wave plate.
Detailed Description
The present invention is further described below in conjunction with the following figures and specific examples so that those skilled in the art may better understand the present invention and practice it, but the examples are not intended to limit the present invention.
Example one
The invention discloses an optical path structure for increasing return loss, which is shown in figure 1 and comprises the following components:
a fiber insertion assembly 10, a collimating lens 20, a converging lens 30, and a PD chip 40.
The center of the optical fiber insertion assembly 10 is provided with a ferrule, and a fiber channel is provided in the ferrule and is used for transmitting incident light.
The light outlet port of the optical fiber channel faces the collimating lens 20, the outlet of the optical fiber channel is arranged in an inclined manner, the inclination angle of the outlet of the optical fiber channel is 4-8 degrees, the inclination angle of the outlet of the optical fiber channel can be selected to be 4 degrees, 5 degrees, 6 degrees, 7 degrees, 8 degrees and the like according to actual conditions, so that the return loss of an optical path is increased, and the inclination angle of the outlet of the optical fiber channel can also be designed to be 0 degree according to requirements. Preferably, in this embodiment, the outlet of the fiber channel gradually increases in distance from the collimating lens 20 from top to bottom.
The above collimator lens 20 converts incident light into collimated light, which is condensed by the condenser lens 30 and is incident on the PD chip 40. The optical axis of the converging lens 30 is parallel to the axis of the PD chip 40 and is arranged off-axis, the off-axis offset of the converging lens 30 may be small, the coupling efficiency is not affected, the off-axis offset may be 0, and if the off-axis offset is not 0, the return loss value of the optical path may be greatly increased.
Further preferably, the collimating lens 20 may be a simple plano-convex lens as shown in fig. 1, or may be a biconvex lens, and the convex surface may be a spherical surface or an aspherical surface.
The side of the convergent lens 30 facing the PD chip 40 is provided with an inclined surface, and the convex surface of the convergent lens 30 is spherical or aspherical. The inclined surface of the condensing lens 30 is inclined at an angle of not more than 10 deg. to increase the return loss of the optical path. Preferably, in the present embodiment, the distance from the inclined surface of the condensing lens 30 to the PD chip 40 decreases gradually from top to bottom.
One part of the converged collimated light is absorbed by the PD chip 40, the proportion of the absorbed part in the incident light is the coupling efficiency, and the other part is reflected on the surface of the PD chip 40 to form a return loss optical path.
Incident light is reflected by the surface of the PD chip 40, reflected light is not collimated light after reversely passing through the converging lens 30, and is obviously coupled and mismatched with a fiber core of the optical fiber channel when being converged to the end face of the optical fiber channel through the collimating lens 20, so that most of the reflected light cannot be coupled into the optical fiber channel, return loss parameters of the optical path are improved, and production efficiency is not influenced.
The PD chip 40 is a photo detection chip, and a receiving surface of the photo detection chip is disposed toward the converging lens 30, and is configured to receive the optical signal converged by the lens assembly and convert the optical signal into an electrical signal.
Further, referring to fig. 2, it is a schematic view of the return loss optical path of the present invention.
The incident light is reflected by the surface of the PD chip 40, the reflected light is reflected by the condensing lens 30 in a reverse direction and is not collimated, and then is condensed by the collimating lens 20 in a reverse direction to the end surface of the optical fiber channel, so that the incident light is obviously mismatched with the fiber core of the optical fiber channel in a coupling manner, and the return loss value is increased.
Example two
Referring to fig. 3, the present invention discloses an optical path structure for increasing return loss, including:
a fiber insertion assembly 10, a collimating lens 20, a converging lens 30, and a PD chip 40.
The center of the optical fiber insertion assembly 10 is provided with a ferrule, and an optical fiber channel is disposed in the ferrule and used for transmitting incident light.
The light outlet port of the optical fiber channel faces the collimating lens 20, the outlet of the optical fiber channel is obliquely arranged, and the distance from the outlet of the optical fiber channel to the collimating lens 20 from top to bottom is gradually increased. Preferably, the inclination angle of the outlet of the optical fiber channel is 4-8 degrees to increase the return loss of the optical path, and the inclination angle of the outlet of the optical fiber channel can also be designed to be 0 degree according to actual requirements.
The above-described collimator lens 20 converts incident light into collimated light, which is condensed by the condenser lens 30 and is incident on the PD chip 40. The optical axis of the converging lens 30 is parallel to the axis of the PD chip 40 and is arranged off-axis, the off-axis offset of the converging lens 30 may be small, the coupling efficiency is not affected, the off-axis offset may be 0, and if the off-axis offset is not 0, the return loss value of the optical path may be greatly increased.
The side of the convergent lens 30 facing the PD chip 40 is provided with an inclined surface, and the convex surface of the convergent lens 30 is spherical or aspherical. Preferably, the distance from the inclined surface of the condensing lens 30 to the PD chip 40 decreases gradually from top to bottom; the inclined plane has an inclination angle of not more than 10 deg. to increase the return loss of the optical path.
In the first embodiment, there is no other optical device between the collimating lens 20 and the converging lens 30, and the whole optical path structure is arranged in a straight line.
In contrast to the first embodiment, in the present embodiment, a full-reflection wave plate 50 and a filter 60 are further disposed between the collimating lens 20 and the converging lens 30.
Specifically, the above-mentioned full-anti wave plate 50 is disposed on a side of the collimating lens 20 away from the fiber insertion assembly 10, and is used for deflecting the collimated light output by the collimating lens 20.
Preferably, the total reflection wave plate 50 is a 45 ° total reflection wave plate, and deflects the optical path by 90 °.
The filter 60 is disposed between the full-wave plate 50 and the collimator lens 20, and is used for filtering the collimated light after deflection.
Specifically, the light output by the optical fiber channel is converted into collimated light through the first collimating lens 20, is deflected through the 45-degree full-reflection wave plate, and is reflected to the filter 60, the filter 60 filters the collimated light after deflection, and the filtered collimated light is converged and incident on the PD chip 40 through the converging lens 30.
EXAMPLE III
The third embodiment is different from the second embodiment in that it includes a first full-anti-wave plate 501 and a second full-anti-wave plate 502. The first full-reflection wave plate 501 is a 13 ° full-reflection wave plate, and the second full-reflection wave plate 502 is a +32 ° full-reflection wave plate.
As shown in fig. 4, light output by the optical fiber channel is converted into collimated light through the first collimating lens 20, and then deflected through the first full-wave-plate 502 and the second full-wave-plate 501 in sequence, so that the collimated light is reflected to the filter 60, and the filter 60 filters the deflected collimated light. The filtered collimated light is condensed by the condensing lens 30 and is incident on the PD chip 40.
Example four
The invention also discloses a method for increasing return loss, which corresponds to the optical path structure for increasing return loss, and specifically comprises the following steps:
step one, emitting incident light from the optical fiber channel, and inputting the incident light to a preset collimating lens 20.
Wherein the light exit ports of the fiber channels are obliquely arranged and face the collimating lens 20.
In the second step, the collimating lens 20 converts the incident light into collimated light, and inputs the collimated light into the preset converging lens 30.
Step three, the condensing lens 30 condenses the collimated light, and the condensed collimated light is obliquely input to the PD chip 40. Part of the collimated light after being converged is absorbed by the PD chip 40, and the other part is reflected on the surface of the PD chip 40, thereby forming a return loss optical path.
The optical axis of the converging lens 30 is parallel to the axis of the PD chip 40 and is disposed off-axis, and an inclined surface is disposed on a side of the converging lens 30 facing the PD chip 40. The off-axis offset of the convergent lens 30 can be small, coupling efficiency is not affected, incident light is reflected by the surface of the PD chip 40, reflected light is not collimated light after reversely passing through the convergent lens 30, and when the reflected light is converged to the end face of the optical fiber channel through the collimating lens 20 reversely, the reflected light is obviously mismatched with the fiber core coupling of the optical fiber channel, most of the reflected light cannot be coupled into the optical fiber channel, return loss parameters of the optical path are improved, and production efficiency is not affected.
EXAMPLE five
The invention also discloses an optical device which comprises the optical path structure for increasing return loss.
The optical device is preferably a single-fiber bidirectional optical device.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the spirit or scope of the invention.
Claims (10)
1. An optical path structure for increasing return loss, comprising: the optical fiber insertion component, the collimating lens, the converging lens and the PD chip;
the optical fiber insertion assembly is internally provided with an optical fiber channel for transmitting incident light;
the light outlet of the optical fiber channel is obliquely arranged and faces the collimating lens; the collimating lens is used for converting incident light into collimated light;
the convergent lens is used for converging the collimated light and enabling the collimated light to be incident to the PD chip, the optical axis of the convergent lens is parallel to the axis of the PD chip and arranged in an off-axis mode, and an inclined surface is arranged on one side, opposite to the PD chip, of the convergent lens.
2. The return loss-increasing optical path structure according to claim 1, wherein the outlet of the optical fiber channel is inclined at an angle of 4 ° to 8 °.
3. The return loss-increasing optical path structure according to claim 1, wherein the inclined surface is inclined at an angle of not more than 10 °.
4. The return loss increasing optical path structure according to claim 3, wherein the PD chip is a photodetection chip;
the receiving surface of the photoelectric detection chip faces the convergent lens and is used for receiving the optical signal converged by the convergent lens.
5. The return loss increasing optical path structure according to claim 1, further comprising a full-inverse wave plate and a filter plate;
the full-reflection wave plate is arranged on one side of the collimating lens, which is far away from the optical fiber insertion assembly, and is used for deflecting the collimated light output by the collimating lens;
the filter plate is arranged between the full-wave-reflecting plate and the collimating lens and used for filtering the collimated light after deflection.
6. The return loss increasing optical path structure according to claim 1, wherein the collimating lens is a biconvex lens or a plano-convex lens, and a convex surface of the collimating lens is a spherical surface or an aspherical surface.
7. The return loss increasing optical path structure according to claim 1, wherein the convex surface of the converging lens is spherical or aspherical.
8. The return loss increased optical circuit structure according to claim 1, wherein the optical fiber insertion assembly includes a ferrule, and the optical fiber passage is disposed in the ferrule.
9. A method of increasing return loss, comprising the steps of:
s1, emitting incident light, and inputting the incident light to a preset collimating lens;
s2, converting the incident light into collimated light based on the collimating lens, and inputting the collimated light to a preset converging lens;
s3, converging the collimated light based on the converging lens, and inputting the converged collimated light to a PD chip in an inclined manner;
and one part of the collimated light after being converged is absorbed by the PD chip, and the other part of the collimated light is reflected on the surface of the PD chip to form a return loss optical path.
10. An optical device comprising the return loss increasing optical path structure according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210545447.1A CN114859470A (en) | 2022-05-19 | 2022-05-19 | Optical path structure and method for increasing return loss and optical device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210545447.1A CN114859470A (en) | 2022-05-19 | 2022-05-19 | Optical path structure and method for increasing return loss and optical device |
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| CN114859470A true CN114859470A (en) | 2022-08-05 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2716853Y (en) * | 2003-12-24 | 2005-08-10 | 武汉光迅科技有限责任公司 | Single-fiber two-way receiving and transmitting integrated module |
| CN101021602A (en) * | 2006-02-16 | 2007-08-22 | 日本板硝子株式会社 | Optical tap module |
| CN109239852A (en) * | 2018-10-15 | 2019-01-18 | 深圳市亚派光电器件有限公司 | Light receiving element |
| CN111650701A (en) * | 2020-06-29 | 2020-09-11 | 成都新易盛通信技术股份有限公司 | Structure for improving return loss and application |
| CN111796369A (en) * | 2020-08-18 | 2020-10-20 | 上海光卓通信设备有限公司 | Integrated ceramic ferrule and optical fiber socket |
| CN113391408A (en) * | 2021-07-19 | 2021-09-14 | 鹰潭市科海光器件有限公司 | SL-type integrated four-core optical fiber movable connector |
| CN214335303U (en) * | 2020-10-27 | 2021-10-01 | 武汉联特科技股份有限公司 | EML TOSA device packaged by coaxial TO-CAN technology |
-
2022
- 2022-05-19 CN CN202210545447.1A patent/CN114859470A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2716853Y (en) * | 2003-12-24 | 2005-08-10 | 武汉光迅科技有限责任公司 | Single-fiber two-way receiving and transmitting integrated module |
| CN101021602A (en) * | 2006-02-16 | 2007-08-22 | 日本板硝子株式会社 | Optical tap module |
| CN109239852A (en) * | 2018-10-15 | 2019-01-18 | 深圳市亚派光电器件有限公司 | Light receiving element |
| CN111650701A (en) * | 2020-06-29 | 2020-09-11 | 成都新易盛通信技术股份有限公司 | Structure for improving return loss and application |
| CN111796369A (en) * | 2020-08-18 | 2020-10-20 | 上海光卓通信设备有限公司 | Integrated ceramic ferrule and optical fiber socket |
| CN214335303U (en) * | 2020-10-27 | 2021-10-01 | 武汉联特科技股份有限公司 | EML TOSA device packaged by coaxial TO-CAN technology |
| CN113391408A (en) * | 2021-07-19 | 2021-09-14 | 鹰潭市科海光器件有限公司 | SL-type integrated four-core optical fiber movable connector |
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