CN111650701A - Structure for improving return loss and application - Google Patents
Structure for improving return loss and application Download PDFInfo
- Publication number
- CN111650701A CN111650701A CN202010604924.8A CN202010604924A CN111650701A CN 111650701 A CN111650701 A CN 111650701A CN 202010604924 A CN202010604924 A CN 202010604924A CN 111650701 A CN111650701 A CN 111650701A
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- collimating lens
- filter
- lens
- return loss
- glass
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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
- G02B6/42—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
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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 the field of optical communication, in particular to a structure for improving return loss, which comprises a first collimating lens, a filter glass, a second collimating lens and a PD chip, wherein the first collimating lens is arranged on the filter glass; the first collimating lens is used for converting incident light into collimated light; the axis of the second collimating lens is perpendicular to the axis of the first collimating lens; the second collimating lens is provided with a virtual plane, and the virtual plane divides the second collimating lens into a first partial lens close to the first collimating lens and a second partial lens far away from the first collimating lens; the filter glass is positioned on one side of the virtual plane close to the first collimating lens and used for reflecting collimated light to the first partial lens, and the PD chip is positioned behind the second collimating lens, and the photosensitive surface of the PD chip faces to the lens component and is parallel to the axis of the first collimating lens. The separation of incident light and reflected light of the photosensitive surface is realized, and the requirements of responsivity, reliability and production efficiency are met.
Description
Technical Field
The invention relates to the field of optical communication, in particular to a structure for improving return loss.
Background
The optical module is widely applied to wireless equipment and transmission equipment to provide forward transmission, intermediate transmission and return transmission and an optical network connection interface in a data center. Currently, as the fifth generation mobile communication (5G) technology gradually enters the commercialization era, the demand of the optical module will be further promoted in the future. As an important component of an optical module, an optical device must also meet the technical requirements of an optical module that can be applied to different scenes.
The return loss is an important parameter for describing the performance of the optical device, and means that when an optical signal is transmitted in the optical device and meets an optical element, part of the optical signal is reflected back to a transmitting end, so that the operation of a laser is interfered or the transmission performance of an optical fiber is influenced. There are two current approaches to improving return loss.
In the first scheme, as shown in fig. 1, a light converging mode is adopted, a PD chip, i.e., a photodetector chip, is packaged by a tube cap with a lens, and by increasing the degree of the inclined plane of the optical fiber ferrule 100, the light energy of light reflected by the photosensitive surface 4 and coupled into the optical fiber is reduced, and the return loss is improved. However, when the scheme is used for a high-speed device, the photosensitive surface 4 is small, the degree of the inclined surface of the optical fiber ferrule 100 is increased, the size of a light spot converged by the lens on the photosensitive surface 4 is increased due to aberration, the light spot exceeds the effective area of the photosensitive surface 4, the responsivity is reduced, and the sensitivity of the device is affected.
In the second scheme, as shown in fig. 2, a collimated light mode is adopted, a PD chip is packaged by a flat window tube cap, and coupling is performed by tilting the PD chip, so that the direction of reflected light from a photosensitive surface is deviated, and the reflected light cannot be coupled into an optical fiber after being collimated by a collimating lens, thereby improving return loss. However, when the PD chip is inclined, on one hand, the adhesive strength of the PD chip is reduced, the release force is weakened, and the PD chip is easy to deform or even fall off by external force in the assembling process, so that the structural stability is reduced, and the reliability risk is caused; on the other hand, due to the influence of tolerance, the inclination angles are not consistent, and the mass production efficiency is greatly reduced; on the other hand, the inclined packaging of the PD chip may cause the flexible board at the receiving end to bend during module assembly, which may pose a reliability risk.
In summary, the above method for improving the return loss cannot satisfy the requirements of responsivity, reliability and production efficiency at the same time.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Disclosure of Invention
The invention aims to: aiming at the problem that the prior art cannot simultaneously meet the requirements of responsivity, reliability and production efficiency, the structure for improving the return loss is provided, a collimated light mode is adopted, the problem that the responsivity and the return loss of a converged light mode are mutually restricted is avoided, and the return loss is improved on the premise of not influencing the responsivity; through arranging the filter slide in one side of collimating lens axis, light gets into from collimating lens partly, jets out from another part, has realized incident light and reflected light separation, has avoided the slope of PD chip, has avoided reliability risk scheduling problem, promotes batch production efficiency.
In order to achieve the purpose, the invention adopts the technical scheme that:
a structure for improving return loss comprises a first collimating lens, a filter glass, a second collimating lens and a PD chip;
the first collimating lens is used for converting incident light into collimated light;
the axis of the second collimating lens is perpendicular to the axis of the first collimating lens;
the second collimating lens is provided with a virtual plane, the axis of the first collimating lens is perpendicular to the virtual plane, and the axis of the second collimating lens is located on the virtual plane;
the virtual plane divides the second collimating lens into a first partial lens close to the first collimating lens and a second partial lens far away from the first collimating lens;
the filter glass is positioned on one side of the virtual plane close to the first collimating lens and used for reflecting collimated light to the first partial lens,
the PD chip is positioned behind the second collimating lens, and a photosensitive surface of the PD chip faces the second collimating lens and is parallel to the axis of the first collimating lens;
the axis of the second collimating lens is perpendicular to the photosensitive surface of the PD chip.
The PD chip is a photodetector chip whose function is to convert optical signals into electrical signals.
Emergent light of the optical fiber is used as incident light of the structure, incident light is converted into a beam of collimated light after passing through the first collimating lens, then the collimated light is converged on the photosensitive surface after being reflected by the filter glass and passing through the second collimating lens; the collimating light beam and the second collimating lens are arranged in an off-axis mode, namely the filter glass is located on one side of the virtual plane, the collimating light beam passes through one side of the virtual plane of the second collimating lens and is converged on the photosensitive surface, reflected light of the photosensitive surface passes through the other side of the virtual plane and is changed into the collimating light beam, separation of the incident light and the reflected light of the photosensitive surface is achieved, the reflected light of the photosensitive surface cannot enter the optical fiber in a coupling mode without passing through the filter glass, and therefore return loss is improved.
The collimating lens is used for condensing light, the collimating light mode is adopted, the problem that the responsivity and return loss of the condensing light mode are restricted mutually is avoided, and the return loss is improved on the premise of not influencing the responsivity; through arranging the filter glass in one side of collimating lens axis, light gets into from one side of the virtual plane of second collimating lens, after the photosurface reflection, jets out from the opposite side of virtual plane, has avoided slope PD chip, has avoided the problem of reliability risk, and to different optical devices, need not to adjust every PD chip inclination and satisfy return loss index requirement, promotes batch production efficiency.
As a preferable aspect of the present invention, the filter is located on a side of the virtual plane away from the first collimating lens, and reflects collimated light to the second partial lens.
As a preferred embodiment of the present invention, the filter slide is a 45 ° filter slide.
As a preferable aspect of the present invention, the filter slide includes a first filter slide for reflecting collimated light to a second filter slide, and a second filter slide for reflecting collimated light to a second collimating lens.
The first filter glass is positioned on the outer side of one side, away from the first collimating lens, of the second collimating lens and used for reflecting collimated light to the second filter glass;
the second filter glass is positioned on one side of the virtual plane close to the first collimating lens and used for reflecting collimated light to the first partial lens.
As a preferable scheme of the invention, the first filter glass is positioned on the outer side of the second collimating lens on the side far away from the first collimating lens and used for reflecting collimated light to the second filter glass;
the second filter glass is positioned on the side, away from the first collimating lens, of the virtual plane and used for reflecting collimated light to the second partial lens.
In a preferred embodiment of the present invention, the first filter slide is a 13 ° filter slide, and the second filter slide is a 32 ° filter slide.
When the filter glass combination of 13 degrees and 32 degrees is adopted, the 13-degree filter glass is only required to be arranged outside the light path of the incident light and the emergent light of the second collimating lens, and the +32 degrees is arranged at the same position as the 45-degree filter glass.
As a preferred aspect of the present invention, the first collimating lens is a collimating lens in an integrated collimating ferrule assembly.
As a preferred aspect of the present invention, the structure is used for a single-fiber bidirectional optical component.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. the structure for improving the return loss of the invention adopts a collimated light mode, avoids the problem that the responsivity and the return loss of a convergent light mode are mutually restricted, and improves the return loss on the premise of not influencing the responsivity; through arranging the filter glass in one side of collimating lens axis, light gets into from one side of the virtual plane of second collimating lens, after the photosurface reflection, jets out from the opposite side of virtual plane, has avoided slope PD chip, avoids reliability risk scheduling problem, and to different optical devices, need not to adjust every PD chip inclination and satisfy return loss index requirement, promotes batch production efficiency.
2. The structure for improving return loss of the invention is suitable for 45-degree filter slides or a combination of 13-degree + 32-degree filter slides.
3. The structure for improving return loss is suitable for a single-fiber bidirectional optical component.
Drawings
Fig. 1 is a schematic structural diagram of a first scheme in the prior art.
Fig. 2 is a schematic structural diagram of a second scheme in the prior art.
Fig. 3 is a schematic diagram of the structure example 1 for improving return loss of the present invention.
Fig. 4 is a schematic diagram of the structure embodiment 2 for improving return loss of the present invention.
Fig. 5 is a schematic diagram of the structure embodiment 3 for improving return loss of the present invention.
Fig. 6 is a schematic diagram of the structure embodiment 4 for improving return loss of the present invention.
Icon: 100-optical fiber core insert; 200-a lens; 1-a first collimating lens; 2-a second collimating lens; 21-a first partial lens; 22-a second partial lens; 3-filtering the glass slide; 31-first filter slide; 32-second filter slide; 4-PD chip.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Arrows in the drawings represent light paths, wherein solid arrows represent incident light of the photosurface, and dotted arrows represent emergent light of the photosurface.
Example 1
A structure for improving return loss is shown in FIG. 4, and comprises a first collimating lens 1, a filter glass 3, a second collimating lens 2 and a PD chip 4;
the first collimating lens 1 is used for converting incident light into collimated light;
the axis of the second collimating lens 2 is perpendicular to the axis of the first collimating lens 1;
the second collimating lens 2 is provided with a virtual plane 5, the axis of the first collimating lens 1 is perpendicular to the virtual plane 5, and the axis of the second collimating lens 2 is located on the virtual plane 5;
the virtual plane 5 divides the second collimating lens 2 into a first partial lens 21 close to the first collimating lens 1 and a second partial lens 22 far from the first collimating lens 1;
the filter glass 3 is located on the side of the virtual plane 5 adjacent to the first collimating lens 1, for reflecting collimated light to the first partial lens 21,
the PD chip 4 is positioned behind the second collimating lens 2; the photosensitive surface of the PD chip 4 faces the second collimating lens 2 and is parallel to the axis of the first collimating lens 1;
the axis of the second collimating lens 2 is perpendicular to the photosensitive surface of the PD chip 4. .
The rear direction means that the incident light firstly passes through the second collimating lens 2 and then reaches the photosensitive surface 4.
The filter slide 3 is a 45-degree filter slide.
The first collimating lens 1 is a collimating lens in an integrated collimating ferrule assembly.
The structure is used for a single-fiber bidirectional optical component.
Example 2
This embodiment differs from embodiment 1 in that the filter glass 3 is located on the side of the virtual plane 5 remote from the first collimating lens 1 for reflecting collimated light to the second partial lens 22. The structure and the optical path are shown in fig. 4, and the structure is used for a single-fiber bidirectional optical component.
Example 3
This embodiment differs from embodiment 1 in that the filter slide 3 includes a first filter slide 31 and a second filter slide 32. Wherein the first filter slide 31 is a 13 ° filter slide and the second filter slide 32 is a +32 ° filter slide.
As shown in fig. 5, the first filter glass 31 is located outside the optical path of the second collimator lens 2, i.e., neither of the first filter glass is on the optical path of the incident light and the reflected light. The second filter 32 is located on the side of the virtual plane 5 adjacent to the first collimating lens 1; the light of the optical fiber is converted into collimated light through the first collimating lens 1, then is reflected to the second filter glass 32 through the first filter glass 31, then is reflected to the first partial lens 21 and reaches the photosensitive surface 4, the reflected light of the photosensitive surface 4 is converted into the collimated light after passing through the second partial lens 22 of the second collimating lens 2, and the first filter glass 31 and the second filter glass 32 are not located on the light path of the reflected light of the photosensitive surface 4.
Example 4
The present embodiment is different from embodiment 3 in that a second filter 32 is provided on a side of the virtual plane 5 away from the first collimating lens 1 for reflecting collimated light to the second partial lens 22. The structure and the optical path thereof are shown in fig. 6.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (9)
1. A structure for improving return loss is characterized by comprising a first collimating lens (1), a filter glass (3), a second collimating lens (2) and a PD chip (4);
the axis of the second collimating lens (2) is perpendicular to the axis of the first collimating lens (1);
the second collimating lens (2) is provided with a virtual plane (5), the axis of the first collimating lens (1) is perpendicular to the virtual plane (5), and the axis of the second collimating lens (2) is located on the virtual plane (5);
the virtual plane (5) divides the second collimating lens (2) into a first partial lens (21) close to the first collimating lens (1) and a second partial lens (22) distant from the first collimating lens (1);
the filter glass (3) is positioned on one side of the virtual plane (5) close to the first collimating lens (1) and is used for reflecting collimated light to the first partial lens (21),
the PD chip (4) is positioned behind the second collimating lens (2), and the photosensitive surface of the PD chip faces the second collimating lens (2) and is parallel to the axis of the first collimating lens (1);
the axis of the second collimating lens (2) is perpendicular to the photosensitive surface of the PD chip (4).
2. The structure for improving return loss according to claim 1, wherein the filter glass (3) is located on a side of the virtual plane (5) remote from the first collimating lens (1) for reflecting collimated light to the second partial lens (22).
3. The structure for improving return loss according to claim 1, wherein the filter glass (3) is a 45 ° filter glass.
4. The structure for improving return loss according to claim 1, wherein the glass filter (3) comprises a first glass filter (31) and a second glass filter (32), the first glass filter (31) being configured to reflect collimated light to the second glass filter (32), the second glass filter (32) being configured to reflect collimated light to the second collimating lens (2).
5. The structure for improving return loss according to claim 4, wherein the first filter glass (31) is located outside a side of the second collimating lens (2) away from the first collimating lens (1) for reflecting collimated light to the second filter glass (32);
the second filter glass (32) is positioned on one side of the virtual plane (5) close to the first collimating lens (1) and is used for reflecting collimated light to the first partial lens (21).
6. The structure for improving return loss according to claim 4, wherein the first filter glass (31) is located outside a side of the second collimating lens (2) away from the first collimating lens (1) for reflecting collimated light to the second filter glass (32);
the second filter glass (32) is positioned on the side of the virtual plane (5) away from the first collimating lens (1) and is used for reflecting collimated light to the second partial lens (22).
7. The structure for improving return loss according to claim 4, wherein the first filter slide (31) is a 13 ° filter slide, and the second filter slide (32) is a 32 ° filter slide.
8. The structure for improving return loss according to claim 1, wherein the first collimating lens (1) is a collimating lens in an integrated collimating ferrule assembly.
9. The return loss improving structure according to any one of claims 1 to 8, wherein the structure is used for a single-fiber bidirectional optical component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010604924.8A CN111650701A (en) | 2020-06-29 | 2020-06-29 | Structure for improving return loss and application |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010604924.8A CN111650701A (en) | 2020-06-29 | 2020-06-29 | Structure for improving return loss and application |
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| CN111650701A true CN111650701A (en) | 2020-09-11 |
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| CN202010604924.8A Pending CN111650701A (en) | 2020-06-29 | 2020-06-29 | Structure for improving return loss and application |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111965769A (en) * | 2020-09-18 | 2020-11-20 | 深圳市都乐精密制造有限公司 | Coupling lens capable of realizing light incidence and light return detection |
| CN112834975A (en) * | 2020-12-30 | 2021-05-25 | 国网河北省电力有限公司电力科学研究院 | Comprehensive calibration method and system for ultrahigh frequency partial discharge sensor |
| CN113341509A (en) * | 2021-05-28 | 2021-09-03 | 深圳市极致兴通科技有限公司 | Ultra-narrow wavelength interval single-fiber bidirectional optical assembly |
| CN114859470A (en) * | 2022-05-19 | 2022-08-05 | 苏州卓昱光子科技有限公司 | Optical path structure and method for increasing return loss and optical device |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07234341A (en) * | 1994-02-23 | 1995-09-05 | Nec Corp | Coupling structure of semiconductor laser and optical fiber |
| CN201780389U (en) * | 2010-05-21 | 2011-03-30 | 浙江合波光学科技有限公司 | Optical fiber device integrating filtering, isolation and mode filed matching functions |
| CN103513344A (en) * | 2012-06-29 | 2014-01-15 | 鸿富锦精密工业（深圳）有限公司 | Optical coupling lens and optical communication device |
| CN106597617A (en) * | 2017-02-28 | 2017-04-26 | 武汉元创光电科技有限公司 | Single-fiber bidirectional optical module device |
| CN110308528A (en) * | 2019-07-25 | 2019-10-08 | 深圳市亚派光电器件有限公司 | Single-fiber bidirectional optical device |
| CN111239923A (en) * | 2020-02-11 | 2020-06-05 | 青岛海信宽带多媒体技术有限公司 | Optical module |
| CN111290087A (en) * | 2020-03-30 | 2020-06-16 | 武汉光谷信息光电子创新中心有限公司 | Light splitting detector |
| CN210835350U (en) * | 2019-11-08 | 2020-06-23 | 武汉东飞凌科技有限公司 | TO-CAN detector based on positive spherical lens tube cap |
-
2020
- 2020-06-29 CN CN202010604924.8A patent/CN111650701A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07234341A (en) * | 1994-02-23 | 1995-09-05 | Nec Corp | Coupling structure of semiconductor laser and optical fiber |
| CN201780389U (en) * | 2010-05-21 | 2011-03-30 | 浙江合波光学科技有限公司 | Optical fiber device integrating filtering, isolation and mode filed matching functions |
| CN103513344A (en) * | 2012-06-29 | 2014-01-15 | 鸿富锦精密工业（深圳）有限公司 | Optical coupling lens and optical communication device |
| CN106597617A (en) * | 2017-02-28 | 2017-04-26 | 武汉元创光电科技有限公司 | Single-fiber bidirectional optical module device |
| CN110308528A (en) * | 2019-07-25 | 2019-10-08 | 深圳市亚派光电器件有限公司 | Single-fiber bidirectional optical device |
| CN210835350U (en) * | 2019-11-08 | 2020-06-23 | 武汉东飞凌科技有限公司 | TO-CAN detector based on positive spherical lens tube cap |
| CN111239923A (en) * | 2020-02-11 | 2020-06-05 | 青岛海信宽带多媒体技术有限公司 | Optical module |
| CN111290087A (en) * | 2020-03-30 | 2020-06-16 | 武汉光谷信息光电子创新中心有限公司 | Light splitting detector |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111965769A (en) * | 2020-09-18 | 2020-11-20 | 深圳市都乐精密制造有限公司 | Coupling lens capable of realizing light incidence and light return detection |
| CN112834975A (en) * | 2020-12-30 | 2021-05-25 | 国网河北省电力有限公司电力科学研究院 | Comprehensive calibration method and system for ultrahigh frequency partial discharge sensor |
| CN112834975B (en) * | 2020-12-30 | 2022-08-30 | 国网河北省电力有限公司电力科学研究院 | Comprehensive calibration method and system for ultrahigh frequency partial discharge sensor |
| CN113341509A (en) * | 2021-05-28 | 2021-09-03 | 深圳市极致兴通科技有限公司 | Ultra-narrow wavelength interval single-fiber bidirectional optical assembly |
| CN114859470A (en) * | 2022-05-19 | 2022-08-05 | 苏州卓昱光子科技有限公司 | Optical path structure and method for increasing return loss and optical device |
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Application publication date: 20200911 |