CN113341509A - Ultra-narrow wavelength interval single-fiber bidirectional optical assembly - Google Patents
Ultra-narrow wavelength interval single-fiber bidirectional optical assembly Download PDFInfo
- Publication number
- CN113341509A CN113341509A CN202110593778.8A CN202110593778A CN113341509A CN 113341509 A CN113341509 A CN 113341509A CN 202110593778 A CN202110593778 A CN 202110593778A CN 113341509 A CN113341509 A CN 113341509A
- Authority
- CN
- China
- Prior art keywords
- lens
- optical
- filter
- light
- optical filter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
- G02B6/4287—Optical modules with tapping or launching means through the surface of the waveguide
-
- 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
- G02B6/4207—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms with optical elements reducing the sensitivity to optical feedback
- G02B6/4208—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms with optical elements reducing the sensitivity to optical feedback using non-reciprocal elements or birefringent plates, i.e. quasi-isolators
- G02B6/4209—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
- G02B6/4215—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
- G02B6/4296—Coupling light guides with opto-electronic elements coupling with sources of high radiant energy, e.g. high power lasers, high temperature light sources
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Couplings Of Light Guides (AREA)
Abstract
The invention provides a single-fiber bidirectional optical component with ultra-narrow wavelength intervals, which comprises a transmitter, an isolator, a receiver and an LC optical fiber adapter, wherein the isolator is arranged in the light emergent direction of the transmitter, a lens component is arranged among the isolator, the receiver and the LC optical fiber adapter, the lens component comprises a first optical filter, a second optical filter and a reflecting lens, the first optical filter is arranged close to the end of the isolator, the second optical filter is arranged close to the end of the receiver, the reflecting lens is arranged on the other side, far away from the receiver, of the second optical filter, the receiver comprises a second converging lens and a photodiode PD, the second converging lens is arranged close to the second optical filter, the light emergent end of the second converging lens is arranged in a mode that the optical axis of the second converging lens deviates from the light beam center of the second optical filter. The invention has the beneficial effects that: the bidirectional transmission of ultra-narrow wavelength intervals with wavelength intervals of 15nm is realized, and the return loss problem brought by a parallel optical system is solved.
Description
Technical Field
The invention relates to an optical device structure, in particular to a single-fiber bidirectional optical component with ultra-narrow wavelength intervals.
Background
Compared with a double-fiber bidirectional optical component, the single-fiber bidirectional optical component is beneficial to fully exploiting the potential of optical fiber bandwidth, reduces the cost of optical fiber wiring, and has important significance for high-speed communication. The wavelength interval of the existing single-fiber bidirectional optical component is more than 60nm, the adopted optical path system mainly takes divergent and convergent light beams and is limited by the wavelength resolution capability of the filter, and the optical path system is difficult to resolve the wavelength interval below 60nm and is easy to cause optical crosstalk between emission and reception. The invention provides a design of an ultra-narrow wavelength interval single-fiber bidirectional optical component with a wavelength interval of 15nm and a design of a collimation light path, solves the problem of resolving narrow wavelength intervals by a filter, and effectively solves the problem of poor return loss of a parallel light system by the off-axis design of a lens and a light beam.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a single-fiber bidirectional optical component with ultra-narrow wavelength intervals, and a collimating optical path is adopted in the optical path design to reduce the resolution difficulty of a filter plate on narrow-wavelength-interval light beams, improve the isolation between different wavelengths in the light beams, and provide a solution for restraining return loss of a parallel optical system.
The invention comprises a transmitter, an isolator, a receiver and an LC optical fiber adapter, wherein the isolator is arranged in the light-emitting direction of the transmitter, a lens assembly is arranged among the isolator, the receiver and the LC optical fiber adapter, the lens assembly comprises a first optical filter, a second optical filter and a reflection lens, the first optical filter is arranged close to the isolator end, the second optical filter is arranged close to the receiver end, the reflection lens is arranged on the other side of the second optical filter far away from the receiver, the receiver comprises a second converging lens arranged close to the second optical filter and a photodiode PD arranged at the light-emitting end of the second converging lens, the optical axis of the second converging lens deviates from the light beam center of the second optical filter,
the light path of the transmitting end is as follows: light emitted by the emitter is transmitted through the first optical filter and then received by the LC optical fiber adapter;
the optical path of the receiving end is as follows: light emitted by the LC optical fiber adapter is reflected by the first optical filter to reach the reflector, reflected by the reflector and then reaches the second optical filter, and then is transmitted to one side of the optical axis of the converging lens through the second optical filter, and the converging lens focuses light beams and then irradiates the surface of the photodiode PD of the receiver at a certain inclination angle.
The invention is further improved, and the chief ray focused by the convergent lens and the optical axis of the convergent lens are inclined to a certain angle and then are incident on the surface of the photodiode PD.
The invention is further improved, the converging lens is horizontally arranged on the upper surface of the emitter, and the second optical filter is obliquely arranged.
The invention is further improved, and the inclination angle between the second optical filter and the plane where the converging lens is located is 3-10 degrees.
The invention is further improved, the emitter comprises a metal shell, a refrigerator arranged in the metal shell, and a laser diode LD arranged on the refrigerator and used for emitting laser, a first converging lens is arranged at the light outlet end of the laser diode LD, an antireflection film is arranged on the light inlet and outlet surface of the first converging lens, the first converging lens adopts a lens with the numerical aperture of more than 0.5, and the first converging lens is arranged at the front end of the laser diode LD and compresses the divergent light beam emitted by the laser diode LD.
The invention is further improved, the isolator is connected with the emitter through a connecting piece, a collimating lens is arranged at the other end of the isolator, light emitted by the first converging lens is adjusted into a collimated light beam through the isolator and the collimating lens, the optical axis of the first optical filter and the optical axis of the collimating lens are inclined at a certain angle, and the collimated light beam is obliquely incident to the surface of the first optical filter.
According to the invention, the sum of the inclination angle between the first filter and the optical axis of the collimating lens and the inclination angle of the reflecting lens relative to the horizontal plane is 45 degrees.
The invention is further improved, the LC optical fiber adapter comprises an optical fiber head arranged in the middle of the LC optical fiber adapter and a collimation/convergence dual-purpose lens which is arranged in the light emitting direction of the optical fiber head and is concentric with the optical fiber head, the collimation/convergence dual-purpose lens is vertically arranged, the light emitting surface of the optical fiber head and the optical axis of the collimation/convergence dual-purpose lens are inclined by 8 degrees, and the inclined direction of the optical fiber head is consistent with the inclined direction of the first optical filter.
The invention is further improved, and the optical fiber head and the collimating/converging dual-purpose lens are integrated into a collimator.
The invention is further improved, the lens is combined into a whole and comprises a base, the base is provided with a first fixing surface, a second fixing surface and a third fixing surface, the first optical filter is arranged on the first fixing surface, the reflection lens is arranged on the second fixing surface, and the second optical filter is arranged on the third fixing surface.
Compared with the prior art, the invention has the beneficial effects that: the design that the optical axis of the collecting lens of the receiving end deviates from the center of the light beam effectively reduces the proportion of reflected light on the surface of the PD returning to the optical fiber head, and improves the return loss resistance of the optical path; the design of the parallel light path reduces the sub-wave loss of the filter plate to the ultra-narrow wavelength interval light beams, and improves the isolation between wavelengths, thereby realizing the bidirectional transmission of the ultra-narrow wavelength interval with the wavelength interval of 15 nm.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a schematic diagram of a receiving end optical path design of a single-fiber bidirectional optical assembly according to the present invention;
FIG. 3 is a schematic diagram of stray light analysis optical path of the PD surface in the optical path system of FIG. 2;
fig. 4 is a schematic diagram of the optical path design of the transmitting end of the single-fiber bidirectional optical component according to the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
As shown in fig. 1, the ultra-narrow wavelength interval single-fiber bidirectional optical component of the present invention includes a Laser Diode (LD) 2, a Photodiode (PD) 14, a focusing lens 3, a collimating lens 6, an isolator 5, a metal housing 1, a metal base 9, a flat window TO 13, a collimating/focusing dual-purpose lens 10, a first filter 7, a second filter 11, a mirror8, a fiber head (Pigtail) 15, and the like, where the fiber head (Pigtail) 15 is fixed in the middle of an LC fiber adapter.
The Laser Diode (LD) 2 is bonded on a semiconductor cooler (TEC) 4 through silver colloid, a converging lens 3 with the numerical aperture of more than 0.5 is arranged at the position of 260 mu m in front of the LD 2, and the diverging light beams emitted by the LD 2 are converged and compressed. The LD 2, the converging lens 3 and the TEC 4 are sealed in the metal shell 1.
As shown in fig. 4, the optical path at the transmitting end of this example is designed as follows:
the light beam emitted from the condensing lens 3 enters the isolator 5 and the collimator lens 6, and the isolator 5 can effectively suppress the reflected light from returning to the LD. By adjusting the position of the isolator 5 and the collimating lens 6 assembly relative to the converging lens 3, the light beam is adjusted to be a parallel light beam, the beam waist diameter of the light beam is 500 μm, and the light beam direction is parallel to the optical axis of the collimating lens 6.
The collimated light beams emitted by the collimating lens 6 are incident to the transmission surface of the first filter 7, the placing angle of the first filter 7 and the optical axis of the collimating lens 6 form an angle of 13 degrees, so that the reflected light of the light beam at the transmitting end can be prevented from returning in the original way at the filter 7, and the light beam at the receiving end can be adjusted in the reflection direction.
The light beam transmitted out of the first filter 7 enters the collimating/condensing dual-purpose lens 10, and the collimating/condensing dual-purpose lens condenses the collimated light beam to the pigtail 15 which is inclined by 8 degrees relative to the optical axis of the collimating/condensing dual-purpose lens 10. The collimating/converging dual-purpose lens 10 and the pigtail 15 are designed concentrically, and the preferable scheme is that the converging lens 10 and the pigtail 15 are made into an integrated collimator, so that the positions of the converging lens 10 and the pigtail 15 can be prevented from being adjusted simultaneously to couple light, and the coupling and assembling efficiency is improved.
As shown in fig. 2 and 3, the optical path at the receiving end of this example is designed as follows:
an optical signal input from the outside to the receiving end passes through the collimating/converging dual-purpose lens 10 and then becomes a collimated light beam, the beam waist diameter of the light beam is 450 μm, and the light emitting direction is parallel to the optical axis of the collimating/converging dual-purpose lens 10.
Collimated light beams emitted by the collimating/converging dual-purpose lens 10 are incident to a reflecting surface of the first filter 7, and the first filter 7 is arranged at an angle so that incident light at a transmitting end and incident light at a receiving end are incident at an angle of 13 degrees. Since the wavelengths are outside the filter passband, the incident light is reflected there.
The light beam reflected by the first filter 7 is incident to the mirror8, the placing angle of the mirror8 is 32 degrees, and the transmission angle of the incident light reflected by the mirror8 is 90 degrees relative to the initial light beam.
The light beam reflected by the mirror8 is incident to the second filter 11, and the second filter 11 can filter out the wave band outside the wavelength of the received optical signal, so that the optical crosstalk is reduced. The placing angle of the second filter plate 11 is 4 degrees, the collimated light beam at the receiving end enters the second filter plate 11 at an angle of 4 degrees, the reflected light at the position can be reflected back at an included angle of 8 degrees with the incident light beam, and the reflected light cannot return to the Pigtail 15, so that the return loss of the second filter plate 11 is reduced. In this embodiment, the second filter 11 is disposed at an angle mainly to reduce the reflected light on the filter, so the angle is not limited to 4 ° and may be 3 to 10 °.
The collimated light beam transmitted by the second filter 11 is incident on the converging lens 12, and preferably, the position of the converging lens 12 in this embodiment is shifted by 120 μm from the center of the light beam in design, and the optical path effect is shown in fig. 3. Since the center of the light beam does not coincide with the optical axis of the converging lens 12, the chief ray passing through the converging lens 12 is inclined, and the chief ray is inclined by 4.7 ° in this embodiment.
The second filter 11 of this example may be shifted from the optical axis direction in the direction parallel to the screen, in the direction perpendicular to the screen, or in both directions.
The inclined light beam emitted from the condensing lens 12 is incident on the flat window TO 13 at an angle of 4.7 °, and the light beam passing through the flat window TO 13 is incident on the surface of the PD 14 at an angle of 4.7 °. Oblique incidence avoids the reflected light from the surface of the PD 14 being routed back into the pigtail. The reflected light analysis optical path on the surface of the PD 14 is shown in fig. 3, two arrow directions respectively represent incident light 16 and reflected light 17 on the surface of the PD 14, and it can be seen that the reflected light on the surface of the PD 14 is deviated from the incident light due to oblique incidence, so that the proportion of the reflected light coupled into the pigtail 15 can be reduced, and the return loss of the PD 14 can be reduced.
The lens assembly is integrated and comprises a base, the base is provided with a first fixing surface, a second fixing surface and a third fixing surface, the first optical filter 7 is arranged on the first fixing surface, the reflection lens 8 is arranged on the second fixing surface, and the second optical filter 11 is arranged on the third fixing surface. The middle part is hollow, and the transmission of the light path cannot be influenced. The integration is an assembly, so that the installation of three assemblies is simplified into one assembly, the installation and the coupling of the optical path are facilitated, and the production efficiency is improved.
The sum of the placing angles of the first filter 7 and the reflecting mirror8 in this example is 45 °, so the present invention is not limited to 13 ° and 32 °, for example, 15 ° and 30 °, and the same technical effect can be achieved.
The invention solves the problem that the filter plate in the conventional divergent light path can not accurately separate the wavelengths with smaller wavelength intervals by adopting the parallel light design at the incident end and the emergent end of the filter plate. Through the design that the optical axis of the lens deviates from the center of the light beam, the scheme for solving the problem of poor return loss of the collimation light path system is provided, so that a very important technical scheme is provided for realizing the bidirectional transmission of the ultra-narrow wavelength.
The conventional divergent Optical path is only suitable for an Optical path system with a wavelength interval larger than 60nm, and when the wavelength interval is smaller than 40nm, the respective capacities of the filter in the divergent Optical path to the wavelength are sharply reduced, which causes crosstalk between a TOSA (Transmitter Optical Subassembly, abbreviated in chinese) and a ROSA (Receiver Optical Subassembly, abbreviated in chinese).
The invention adopts a method that the convergent lens deviates from the center of the light beam to solve the common problem that return loss in a parallel light path is difficult to control, one embodiment provided by the invention adopts a scheme that the optical axis of the lens deviates from the center of the light beam by 120 mu m, and other deviation values can also realize damage resistance.
The collimating lens 6, the collimating/converging dual-purpose lens 10 and the converging lens 12 in this embodiment are the same type of lens, and the reason why the collimating lens 6 and the collimating/converging dual-purpose lens 10 are the same type of lens is that the coupling efficiency of the TOSA can be improved by using the same type of lens to respectively collimate and converge light beams. The converging lens 12 may be the same as or different from the collimating lens 6 and the collimating/converging dual-purpose lens 10, and the choice in this patent is also to increase the purchase amount of the same type of lens, so as to reduce the price of a single lens and the production cost.
The above-described embodiments are intended to be illustrative, and not restrictive, of the invention, and all changes that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (10)
1. A single-fiber bidirectional optical component with ultra-narrow wavelength intervals is characterized in that: the optical fiber coupling device comprises a transmitter, an isolator, a receiver and an LC optical fiber adapter, wherein the isolator is arranged in the light emitting direction of the transmitter, a lens assembly is arranged between the isolator, the receiver and the LC optical fiber adapter and comprises a first optical filter, a second optical filter and a reflection lens, the first optical filter is arranged close to the isolator end, the second optical filter is arranged close to the receiver end, the reflection lens is arranged on the other side, away from the receiver, of the second optical filter, the receiver comprises a second converging lens and a photodiode PD, the second converging lens is arranged close to the second optical filter, the photodiode PD is arranged at the light emitting end of the second converging lens, the optical axis of the second converging lens deviates from the light beam center of the second optical filter,
the light path of the transmitting end is as follows: light emitted by the emitter is transmitted through the first optical filter and then received by the LC optical fiber adapter;
the optical path of the receiving end is as follows: light emitted by the LC optical fiber adapter is reflected by the first optical filter to reach the reflector, reflected by the reflector and then reaches the second optical filter, and then is transmitted to one side of the optical axis of the converging lens through the second optical filter, and the converging lens focuses light beams and then irradiates the surface of the photodiode PD of the receiver at a certain inclination angle.
2. The ultra-narrow wavelength spaced single-fiber bi-directional optical assembly of claim 1, wherein: the chief ray focused by the convergent lens and the optical axis of the convergent lens are inclined at a certain angle and then are incident on the surface of the photodiode PD.
3. The ultra-narrow wavelength spaced single-fiber bi-directional optical assembly of claim 2, wherein: the converging lens is horizontally arranged on the upper surface of the emitter, and the second optical filter is obliquely arranged.
4. The ultra-narrow wavelength spaced single-fiber bi-directional optical assembly of claim 3, wherein: the inclination angle between the second optical filter and the plane where the converging lens is located is 3-10 degrees.
5. The ultra-narrow wavelength spaced single-fiber bi-directional optical assembly of any one of claims 1 to 4, wherein: the emitter comprises a metal shell, a refrigerator arranged in the metal shell, and a laser diode LD arranged on the refrigerator and used for emitting laser, wherein a first collecting lens is arranged at the light outlet end of the laser diode LD, an antireflection film is arranged on the light inlet and outlet surface of the first collecting lens, the first collecting lens adopts a lens with the numerical aperture of more than 0.5, and the first collecting lens is placed at the front end of the laser diode LD and compresses divergent light beams emitted by the laser diode LD.
6. The ultra-narrow wavelength spaced single-fiber bi-directional optical assembly of claim 5, wherein: the isolator passes through the connecting piece and links to each other with the transmitter, the isolator other end is equipped with collimating lens, the light that first convergent lens sent is adjusted into the collimated light beam through isolator, collimating lens, the certain angle setting of first light filter and collimating lens's optical axis slope, collimated light beam incides to one side first light filter surface.
7. The ultra-narrow wavelength spaced single-fiber bi-directional optical assembly of claim 6, wherein: the sum of the inclination angle between the optical axes of the first filter and the collimating lens and the inclination angle of the reflecting lens relative to the horizontal plane is 45 degrees.
8. The ultra-narrow wavelength spaced single-fiber bi-directional optical assembly of claim 6, wherein: the LC optical fiber adapter comprises an optical fiber head arranged in the middle of the LC optical fiber adapter and a collimation/convergence dual-purpose lens which is arranged in the light emitting direction of the optical fiber head and is concentric with the optical fiber head, the collimation/convergence dual-purpose lens is vertically arranged, the light emitting surface of the optical fiber head and the optical axis of the collimation/convergence dual-purpose lens are inclined for 8 degrees, and the inclination direction of the optical fiber head is consistent with the inclination direction of the first optical filter.
9. The ultra-narrow wavelength spaced single-fiber bi-directional optical assembly of claim 8, wherein: the optical fiber head and the collimating/converging dual-purpose lens are integrally arranged.
10. The ultra-narrow wavelength spaced single-fiber bi-directional optical assembly of any one of claims 1 to 4, wherein: the lens assembly is integrally arranged and comprises a base, the base is provided with a first fixing surface, a second fixing surface and a third fixing surface, the first optical filter is arranged on the first fixing surface, the reflection lens is arranged on the second fixing surface, and the second optical filter is arranged on the third fixing surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110593778.8A CN113341509A (en) | 2021-05-28 | 2021-05-28 | Ultra-narrow wavelength interval single-fiber bidirectional optical assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110593778.8A CN113341509A (en) | 2021-05-28 | 2021-05-28 | Ultra-narrow wavelength interval single-fiber bidirectional optical assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113341509A true CN113341509A (en) | 2021-09-03 |
Family
ID=77472002
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110593778.8A Pending CN113341509A (en) | 2021-05-28 | 2021-05-28 | Ultra-narrow wavelength interval single-fiber bidirectional optical assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113341509A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102081206A (en) * | 2010-12-24 | 2011-06-01 | 武汉电信器件有限公司 | Single fiber bidirectional device |
| CN203708255U (en) * | 2014-01-23 | 2014-07-09 | 武汉电信器件有限公司 | Parallel optical path online monitoring device |
| CN205427370U (en) * | 2016-02-03 | 2016-08-03 | 深圳市镭神智能***有限公司 | An optical separator |
| CN110531470A (en) * | 2019-08-20 | 2019-12-03 | 深圳市极致兴通科技有限公司 | A kind of single-optical fiber bi-directional transceiver of narrow wavelength interval |
| 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 |
| 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 |
-
2021
- 2021-05-28 CN CN202110593778.8A patent/CN113341509A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102081206A (en) * | 2010-12-24 | 2011-06-01 | 武汉电信器件有限公司 | Single fiber bidirectional device |
| CN203708255U (en) * | 2014-01-23 | 2014-07-09 | 武汉电信器件有限公司 | Parallel optical path online monitoring device |
| CN205427370U (en) * | 2016-02-03 | 2016-08-03 | 深圳市镭神智能***有限公司 | An optical separator |
| CN110531470A (en) * | 2019-08-20 | 2019-12-03 | 深圳市极致兴通科技有限公司 | A kind of single-optical fiber bi-directional transceiver of narrow wavelength interval |
| 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 |
| 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 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6939058B2 (en) | Optical module for high-speed bidirectional transceiver | |
| US6668113B2 (en) | Compact optical assembly for optoelectronic transceivers | |
| KR100703464B1 (en) | Bi-directional optical transceiver | |
| US4904043A (en) | Optical data link dual wavelength coupler | |
| US5408559A (en) | Optoelectronic device | |
| US7654750B2 (en) | Bidirectional optical fiber link systems component couplers | |
| CN107045197B (en) | Optical path control system and optical module | |
| CN109324376A (en) | A kind of coaxial spaces light transmitting-receiving communication device | |
| WO2005073772A1 (en) | Optical sub-assembly for long reach optical transceiver | |
| CN202083815U (en) | Photic transmit-receive assembly for parallel transmission | |
| KR20150019945A (en) | Optical receiver device with wavelength selective filter of wavelength tunable type | |
| CN102169214A (en) | Optical transceiver component for parallel transmission | |
| US5621573A (en) | Microoptic bidirectional module | |
| US6661951B1 (en) | Optoelectric alignment apparatus | |
| US7136552B2 (en) | TO-packaged optic-fiber receiving interface and method | |
| CN219657907U (en) | Signal transmission device adopting collimation light path | |
| CN213957685U (en) | Optical transceiver | |
| CN107462987B (en) | Light path control system and optical module | |
| CN112612065A (en) | Coaxial optical fiber sensor | |
| CN113341509A (en) | Ultra-narrow wavelength interval single-fiber bidirectional optical assembly | |
| WO2021016797A1 (en) | Laser beam emission module and mounting and adjustment method therefor, laser radar, and smart sensing apparatus | |
| CN217606136U (en) | Optical module | |
| US5404414A (en) | Optical coupler with high degree of isolation | |
| CN217606135U (en) | Optical module | |
| JP3417200B2 (en) | Optical transmission / reception module |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210903 |