CN117555088A - Single-fiber bidirectional optical device with duplex LC interface - Google Patents
Single-fiber bidirectional optical device with duplex LC interface Download PDFInfo
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- CN117555088A CN117555088A CN202311831429.0A CN202311831429A CN117555088A CN 117555088 A CN117555088 A CN 117555088A CN 202311831429 A CN202311831429 A CN 202311831429A CN 117555088 A CN117555088 A CN 117555088A
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- 230000003287 optical effect Effects 0.000 title claims abstract description 105
- 239000000835 fiber Substances 0.000 title claims abstract description 31
- 230000002457 bidirectional effect Effects 0.000 title claims abstract description 22
- 239000013307 optical fiber Substances 0.000 claims abstract description 32
- 239000000758 substrate Substances 0.000 claims description 12
- RVCKCEDKBVEEHL-UHFFFAOYSA-N 2,3,4,5,6-pentachlorobenzyl alcohol Chemical compound OCC1=C(Cl)C(Cl)=C(Cl)C(Cl)=C1Cl RVCKCEDKBVEEHL-UHFFFAOYSA-N 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 abstract description 9
- 239000011159 matrix material Substances 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 5
- 238000010168 coupling process Methods 0.000 abstract description 4
- 238000004891 communication Methods 0.000 abstract description 3
- 230000008878 coupling Effects 0.000 abstract description 3
- 238000005859 coupling reaction Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 description 4
- 238000005538 encapsulation Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000000576 coating method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 239000007888 film coating Substances 0.000 description 1
- 238000009501 film coating Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
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
- G02B6/42—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
- G02B6/4246—Bidirectionally operating package structures
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Couplings Of Light Guides (AREA)
Abstract
The invention relates to the technical field of optical communication, in particular to a single-fiber bidirectional optical device with a duplex LC interface, which comprises a lens matrix provided with a first lens and a second lens, wherein the lens matrix is also provided with a groove and a reflecting inclined plane, an optical filter is arranged in the groove, and a first surface of the optical filter is plated with a wavelength division film; the first lens collimates the emitted light of the light emitting element into parallel light and emits the parallel light to the first surface of the optical filter, and the parallel light is focused into the optical fiber through the first side surface of the groove after being reflected by the first surface; the reflection inclined plane receives the optical fiber emitted light sequentially passing through the first side surface of the groove, the first surface of the optical filter, the second surface of the optical filter and the second side surface of the groove, reflects the emitted light to the second lens, and converges the emitted light to the light receiving element through the second lens. The single-fiber bidirectional optical device realizes the independent single-fiber bidirectional transmission of 2 optical fibers, realizes the transmission of higher speed under the same size, improves the coupling efficiency and reduces the process difficulty.
Description
Technical Field
The invention relates to the technical field of optical fiber communication high-speed optical modules, in particular to a single-fiber bidirectional optical device with a duplex LC interface.
Background
In recent years, the rapid development of optical communication technology has increased the requirements on data transmission rate and bandwidth, and the integration level needs to be improved while the transmission rate is improved, so that the process cost and the material cost are reduced. In the single-fiber bidirectional device based on QSFP optical module encapsulation, 2 independent lenses are generally adopted for encapsulation, wavelength division multiplexing is carried out on a lens assembly optical filter, so that 2 wavelength signals are transmitted on one optical fiber, but 2 independent lenses are adopted, 2 encapsulation coupling processes are needed, and the material and process cost is high.
Disclosure of Invention
The invention aims to provide a single-fiber bidirectional optical device with a duplex LC interface, which solves the problems pointed out in the background technology.
The embodiment of the invention is realized by the following technical scheme: a single-fiber bidirectional optical device with duplex LC interfaces comprises N optical transmitting elements and optical receiving elements, wherein N is a positive integer greater than or equal to 2, and the optical transmitting elements are VCSEL lasers;
the optical fiber lens comprises a first lens, a second lens, a first lens substrate, a second lens substrate, a groove, a reflection inclined plane and a first surface, wherein the first lens substrate is provided with the first lens and the second lens;
the first lens is arranged on an emergent light path of the light emitting element, and is used for collimating the emitted light of the light emitting element into parallel light and emitting the parallel light to the first surface of the optical filter, and the parallel light is focused into the optical fiber through the first side surface of the groove after being reflected by the first surface of the optical filter;
the second lens is arranged on an incident light path of the light receiving element, the reflecting inclined plane is used for receiving optical fiber emitted light which sequentially passes through the first side face of the groove, the first surface of the optical filter, the second surface of the optical filter and the second side face of the groove, then the emitted light is reflected to the second lens, and the emitted light is converged into the light receiving element through the second lens.
According to a preferred embodiment, the second surface of the optical filter is coated with an attenuation film.
According to a preferred embodiment, the optical filter further comprises a third lens located on the same side of the first side of the groove for focusing the emitted light reflected by the first surface of the optical filter through the first side of the groove into the optical fiber, and collimating the emitted light of the optical fiber into parallel light and emitting the parallel light through the first side of the groove to the first surface of the optical filter.
According to a preferred embodiment, N optical filters are disposed in the grooves corresponding to the light emitting element and the light receiving element, and the first surfaces of the N optical filters are respectively coated with wavelength division films with different wavelength selectivities.
According to a preferred embodiment, the number of optical filters is 1, and the first surface of the optical filters is coated with N wavelength-division films with different wavelength selectivities.
According to a preferred embodiment, one end of the optical filter is fixed to the first side of the groove and the other end is fixed to the second side of the groove.
According to a preferred embodiment, a space is provided between the first surface of the optical filter and the first side of the recess.
According to a preferred embodiment, the lens substrate is disposed on the PCBA board, and the light emitting element and the light receiving element are disposed in the lens substrate and electrically connected to the PCBA board through connection wires.
According to a preferred embodiment, the light emitting device further comprises a driving chip, wherein a signal output end of the driving chip is connected with a signal input end of the light emitting element, and a transimpedance amplifier, wherein a signal input end of the transimpedance amplifier is connected with a signal output end of the light receiving element.
According to a preferred embodiment, the driving chip and the transimpedance amplifier are all disposed in the lens base.
The technical scheme of the single-fiber bidirectional optical device of the duplex LC interface has at least the following advantages and beneficial effects: the invention comprises N light emitting elements and light receiving elements, wherein N is a positive integer greater than or equal to 2, and the light emitting elements are VCSEL lasers; the optical fiber lens comprises a first lens, a second lens, a first lens substrate, a second lens substrate, a groove, a reflection inclined plane and a first surface, wherein the first lens substrate is provided with the first lens and the second lens; the first lens is arranged on an emergent light path of the light emitting element, and is used for collimating the emitted light of the light emitting element into parallel light and emitting the parallel light to the first surface of the optical filter, and the parallel light is focused into the optical fiber through the first side surface of the groove after being reflected by the first surface of the optical filter; the second lens is arranged on an incident light path of the light receiving element, the reflecting inclined plane is used for receiving optical fiber emitted light which sequentially passes through the first side face of the groove, the first surface of the optical filter, the second surface of the optical filter and the second side face of the groove, then the emitted light is reflected to the second lens, and the emitted light is converged into the light receiving element through the second lens.
Compared with the common duplex LC QSFP optical module package, the single-fiber bidirectional optical device of the duplex LC interface realizes that 2 optical fibers realize independent single-fiber bidirectional transmission, the size meets the duplex LC QSFP optical module package, realizes higher-speed transmission on the basis of not changing the existing size, and simultaneously improves the coupling efficiency and reduces the process difficulty.
Drawings
Fig. 1 is a top view of a single-fiber bidirectional optical device of a duplex LC interface provided in embodiment 1 of the present invention;
fig. 2 is a schematic diagram of the collimation of the emitted light by the first lens according to embodiment 1 of the present invention;
FIG. 3 is a schematic diagram of reflection of the emitted light and the received light by the optical filter according to embodiment 1 of the present invention;
icon: 1-light emitting element, 2-light receiving element, 3-lens base, 4-first lens, 5-second lens, 6-recess, 7-reflection inclined plane, 8-first side of recess, 9-optic fibre, 10-optical filter, 11-second side of recess, 12-first surface of optical filter, 13-second surface of optical filter, 14-PCBA board, 15-driver chip, 16-transimpedance amplifier.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Example 1
Referring to fig. 1, fig. 1 is a top view of a single-fiber bidirectional optical device with a duplex LC interface according to an embodiment of the present invention; specifically, the single-fiber bidirectional optical device of the duplex LC interface provided in this embodiment includes N optical transmitting elements 1 and optical receiving elements 2, where N is a positive integer greater than or equal to 2, and the optical transmitting elements 1 are VCSEL lasers.
Specifically, the single-fiber bidirectional optical device further comprises a lens substrate 3 provided with a first lens 4 and a second lens 5, the lens substrate 3 is further provided with a groove 6 and a reflecting inclined plane 7, the reflecting inclined plane 7 and the optical fiber 9 are respectively positioned on two sides of the groove 6, an optical filter 10 is arranged in the groove 6, a wavelength division film is plated on a first surface 12 of the optical filter, an attenuation film is plated on a second surface 13 of the optical filter, and common dielectric film coating materials and mature coating processes can be selected on the coating materials.
Further, the lens base 3 is disposed on the PCBA board 14, and the light emitting element 1 and the light receiving element 2 are disposed in the lens base 3 and electrically connected to the PCBA board 14 through connection wires. The single-fiber bidirectional optical device further comprises a driving chip 15 and a transimpedance amplifier 16, wherein the signal output end of the driving chip 15 is connected with the signal input end of the optical transmitting element 1, the signal input end of the transimpedance amplifier 16 is connected with the signal output end of the optical receiving element 2, and the driving chip 15 and the transimpedance amplifier 16 are both arranged in the lens matrix 3.
Further, in one implementation manner of this embodiment, one end of the optical filter 10 is fixed to the first side 8 of the groove, and the other end is fixed to the second side 11 of the groove, and a space is provided between the first surface 12 of the optical filter and the first side 8 of the groove.
Wherein the first lens 4 is disposed on an outgoing light path of the light emitting element 1, specifically, as shown in fig. 2, the outgoing light path is implemented as follows: the VCSEL laser emits light to be collimated into parallel light through the first lens 4, the parallel light is emitted to the first surface 12 of the optical filter through the lens matrix 3 and air, and the parallel light is focused into the optical fiber 9 for transmission after being reflected by the first surface 12 wavelength division film of the optical filter and focused into the optical fiber 9 through the air and the first side surface 8 of the groove.
The second lens 5 is disposed on the incident light path of the light receiving element 2; specifically, as shown in fig. 3, the incident light path is implemented as follows: the received light in the optical fiber 9 reaches the first surface 12 of the optical filter through the lens matrix 3, the first side surface 8 of the groove and the air, and passes through the second surface 13 of the optical filter, the air, the second side surface 11 of the groove and the lens matrix 3 to reach the reflecting inclined plane 7 after being transmitted through the first surface 12 of the optical filter, and reaches the second lens 5 through the reflection of the reflecting inclined plane 7 and is converged on the light receiving element 2 through the second lens 5, so that the signals with different wavelengths are simultaneously transmitted and received on one optical fiber 9.
In summary, compared with the common duplex LC QSFP optical module package, the single-fiber bidirectional optical device of the duplex LC interface realizes that 2 optical fibers 9 realize independent single-fiber bidirectional transmission, the size satisfies the duplex LC QSFP optical module package, realizes higher-rate transmission on the basis of not changing the existing size, and simultaneously improves the coupling efficiency and reduces the process difficulty.
Example 2
This example was further modified on the basis of example 1, with the following specific modifications:
the single-fiber bi-directional optical device further comprises a third lens located on the same side as the first side 8 of the groove, for focusing the emitted light reflected by the first side 8 of the groove after having passed through the first surface 12 of the optical filter into the optical fiber 9, and collimating the emitted light of the optical fiber 9 into parallel light and emitting the parallel light to the first surface 12 of the optical filter through the first side 8 of the groove.
Example 3
The present embodiment provides an optical filter 10 setting scheme based on the above embodiment, where the scheme is specifically as follows: n optical filters 10 are arranged in the grooves 6 corresponding to the light emitting element 1 and the light receiving element 2, and the first surfaces 12 of the N optical filters are respectively plated with wavelength division films with different wavelength selectivities; in one implementation of this embodiment, N is 2, and 2 optical filters 10 are respectively disposed corresponding to one optical fiber 9, so that the 2 optical fibers 9 of the duplex LC can transmit and receive signals independently.
In particular to one implementation of this embodiment, the first surface 12 of the first optical filter is coated with a wavelength division film that reflects the first signal λ1 and transmits the second signal λ2, and the first surface 12 of the second optical filter is coated with a wavelength division film that reflects the second signal λ2 and transmits the first signal λ1.
Example 4
Unlike embodiment 3, this embodiment provides another arrangement scheme of the optical filter 10, which is specifically as follows: the number of the optical filters 10 in the groove 6 is 1, the first surface 12 of the optical filters is plated with N wavelength division films with different wavelength selectivities, and the wavelength division multiplexing is realized by transmitting the received light and the emitted light of the 2 optical fibers 9 to the wavelength division films with the wavelength selectivities, so that the 2 optical fibers 9 of the duplex LC can also respectively and independently realize the signal transmission and the signal reception.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The single-fiber bidirectional optical device with the duplex LC interface is characterized by comprising N light emitting elements (1) and light receiving elements (2), wherein N is a positive integer greater than or equal to 2, and the light emitting elements (1) are VCSELs;
the optical fiber lens comprises a lens body (3) provided with a first lens (4) and a second lens (5), wherein the lens body (3) is also provided with a groove (6) and a reflecting inclined plane (7), the reflecting inclined plane (7) and an optical fiber (9) are respectively positioned at two sides of the groove (6), an optical filter (10) is arranged in the groove (6), and a first surface (12) of the optical filter is plated with a wavelength division film;
the first lens (4) is arranged on an emergent light path of the light emitting element (1), and the first lens (4) is used for collimating the emitted light of the light emitting element (1) into parallel light and emitting the parallel light to the first surface (12) of the optical filter, and the parallel light is focused into the optical fiber (9) through the first side surface (8) of the groove after being reflected by the first surface (12) of the optical filter;
the second lens (5) is arranged on an incident light path of the light receiving element (2), the reflecting inclined plane (7) is used for receiving light emitted by the optical fibers (9) sequentially passing through the first side face (8) of the groove, the first surface (12) of the optical filter, the second surface (13) of the optical filter and the second side face (11) of the groove, then the emitted light is reflected to the second lens (5), and the emitted light is converged into the light receiving element (2) through the second lens (5).
2. A duplex LC interface single fiber bi-directional optical device according to claim 1, wherein the second surface (13) of the optical filter is coated with an attenuation film.
3. The duplex LC interface single fiber bi-directional optical device according to claim 2, further comprising a third lens on the same side as the first side (8) of the groove for focusing the emitted light reflected by the first surface (12) of the optical filter through the first side (8) of the groove into the optical fiber (9) and collimating the emitted light of the optical fiber (9) into parallel light and emitting the parallel light through the first side (8) of the groove to the first surface (12) of the optical filter.
4. A duplex LC interface single-fiber bi-directional optical device according to claim 3, characterized in that N optical filters (10) are provided in the grooves (6) corresponding to the light emitting element (1) and the light receiving element (2), the first surfaces (12) of the N optical filters being respectively coated with wavelength division films of different wavelength selectivities.
5. A duplex LC interface single fiber bi-directional optical device according to claim 3, wherein the number of optical filters (10) is 1, the first surface (12) of the optical filters being coated with N different wavelength selective wavelength division films.
6. A duplex LC interface single fiber bi-directional optical device according to any of claims 4 to 5, wherein one end of the optical filter (10) is fixed to the first side (8) of the groove and the other end is fixed to the second side (11) of the groove.
7. The duplex LC interface single fiber bi-directional optical device according to claim 6, wherein a space is provided between the first surface (12) of the optical filter and the first side (8) of the recess.
8. The single-fiber bidirectional optical device of the duplex LC interface according to claim 1, wherein the lens substrate (3) is disposed on the PCBA board (14), and the light emitting element (1) and the light receiving element (2) are both disposed in the lens substrate (3) and electrically connected to the PCBA board (14) through connection wires.
9. The single-fiber bi-directional optical device of a duplex LC interface according to claim 8, further comprising a driver chip (15) and a transimpedance amplifier (16), wherein the signal output of the driver chip (15) is connected to the signal input of the light emitting element (1), and the signal input of the transimpedance amplifier (16) is connected to the signal output of the light receiving element (2).
10. The single-fiber bidirectional optical device of the duplex LC interface according to claim 9, wherein the driving chip (15) and the transimpedance amplifier (16) are both disposed within the lens base (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311831429.0A CN117555088A (en) | 2023-12-27 | 2023-12-27 | Single-fiber bidirectional optical device with duplex LC interface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311831429.0A CN117555088A (en) | 2023-12-27 | 2023-12-27 | Single-fiber bidirectional optical device with duplex LC interface |
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| Publication Number | Publication Date |
|---|---|
| CN117555088A true CN117555088A (en) | 2024-02-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311831429.0A Pending CN117555088A (en) | 2023-12-27 | 2023-12-27 | Single-fiber bidirectional optical device with duplex LC interface |
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| Country | Link |
|---|---|
| CN (1) | CN117555088A (en) |
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2023
- 2023-12-27 CN CN202311831429.0A patent/CN117555088A/en active Pending
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Effective date of registration: 20241013 Address after: No. 510, IoT Avenue, Huangjia Street, Shuangliu District, Chengdu City, Sichuan Province 610200 Applicant after: EOPTOLINK TECHNOLOGY, Inc. Country or region after: China Address before: 6 / F, building 1, 21 Gaopeng Avenue, high tech Zone, Chengdu, Sichuan 610000 Applicant before: EOPTOLINK TECHNOLOGY, Inc. Country or region before: China Applicant before: EOPTOLINK TECHNOLOGY Inc.,Ltd. |