CN115185041A - Single-fiber bidirectional optical module and single-fiber bidirectional BOX packaging device - Google Patents

Single-fiber bidirectional optical module and single-fiber bidirectional BOX packaging device Download PDF

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Publication number
CN115185041A
CN115185041A CN202210909877.7A CN202210909877A CN115185041A CN 115185041 A CN115185041 A CN 115185041A CN 202210909877 A CN202210909877 A CN 202210909877A CN 115185041 A CN115185041 A CN 115185041A
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China
Prior art keywords
optical
port
splitting surface
beam splitting
fiber
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CN202210909877.7A
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Chinese (zh)
Inventor
邹支农
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Suzhou Tfc Optical Communication Co ltd
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Suzhou Tfc Optical Communication Co ltd
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Priority to CN202210909877.7A priority Critical patent/CN115185041A/en
Publication of CN115185041A publication Critical patent/CN115185041A/en
Withdrawn legal-status Critical Current

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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
    • G02B6/27—Optical coupling means with polarisation selective and adjusting means
    • G02B6/2746—Optical coupling means with polarisation selective and adjusting means comprising non-reciprocal devices, e.g. isolators, FRM, circulators, quasi-isolators
    • 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

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Couplings Of Light Guides (AREA)

Abstract

The invention discloses a single-fiber bidirectional optical module which is characterized by comprising an optical circulator, an optical transmitter, an optical receiver and an optical fiber component; the optical circulator comprises a first port, a second port and a third port; the light emitter is arranged corresponding to the first port; the optical receiver is arranged corresponding to the third port; the optical fiber assembly is arranged corresponding to the second port; wherein, the optical signal emitted by the optical transmitter can be input into the optical circulator from the first port and output from the second port to be coupled to the optical fiber component; an optical signal input by the fiber optic assembly can be input into the optical circulator from the second port and output from the third port to be coupled to the fiber optic assembly optical receiver. According to the single-fiber bidirectional optical module and the single-fiber bidirectional BOX packaging device, the optical transmitter and the optical receiver are integrated on the same optical module through the arrangement of the optical circulator, so that the manufacturing process flow of the optical module is reduced, and the integration and miniaturization of the optical module are facilitated.

Description

Single-fiber bidirectional optical module and single-fiber bidirectional BOX packaging device
Technical Field
The present invention relates to the field of optical communications, and in particular, to a bidirectional optical module and a bidirectional BOX package device.
Background
In an existing optical module product for optical communication signal transmission, a transmitting end module and a receiving end module of an optical path device are usually manufactured as two independent units, and particularly, in an optical communication device packaged by a BOX (BOX) of a high-speed device, a TOSA (transmitter optical subassembly) device of a signal transmitting end and a ROSA (receiver optical subassembly) device of a signal receiving end are manufactured as two device modules. The product has complex manufacturing process, large power consumption of the optical module and large occupied module space, and is not beneficial to the integration and miniaturization development of the optical module.
Therefore, in order to solve the above technical problems, it is necessary to provide a new bidirectional optical module and bidirectional BOX package device.
Disclosure of Invention
The invention aims to provide a single-fiber bidirectional optical module and a single-fiber bidirectional BOX (BOX) packaging device, wherein an optical signal transmitting end and an optical signal receiving end are integrated on one module, so that the manufacturing process flow can be reduced, and the integration and the miniaturization of the optical module are facilitated.
In order to realize the purpose, the technical scheme provided by the invention is as follows:
in a first aspect, the invention provides a single-fiber bidirectional optical module, which specifically comprises an optical circulator, an optical transmitter, an optical receiver and an optical fiber assembly; the optical circulator comprises a first port, a second port and a third port; the light emitter is arranged corresponding to the first port; the optical receiver is arranged corresponding to the third port; a fiber optic assembly disposed corresponding to the second port; wherein an optical signal emitted by the optical transmitter can be input into the optical circulator from the first port and output from the second port to be coupled to the optical fiber assembly; and the optical signal input by the optical fiber assembly can be input into the optical circulator from the second port and output from the third port to be coupled to the optical receiver of the optical fiber assembly.
In one or more embodiments, the optical circulator further includes a first polarization beam splitting prism set, a faraday rotation plate, a half-wave plate, and a second polarization beam splitting prism set, which are sequentially disposed.
In one or more embodiments, the first polarization beam splitter prism group includes a first beam splitter and a second beam splitter parallel to each other, and the second polarization beam splitter prism group includes a third beam splitter and a fourth beam splitter parallel to the first beam splitter and the second beam splitter.
In one or more embodiments, the first port corresponds to the first light splitting surface arrangement, the second port corresponds to the third light splitting surface arrangement, and the third port corresponds to the second light splitting surface arrangement.
In one or more embodiments, each of the first polarization splitting prism group and the second polarization splitting prism group includes two 45 ° right-angled prisms and one 45 ° rhombic prism, and inclined surfaces of the two 45 ° right-angled prisms are respectively glued with two inclined surfaces of the one 45 ° rhombic prism.
In one or more embodiments, the optical transmitter includes a laser chip, the optical receiver includes a detector chip, and the laser chip and the detector chip are integrated on a heat sink.
In one or more embodiments, the material of the heat sink is aluminum nitride.
In one or more embodiments, a first coupling lens is disposed between the optical transmitter and the first port, and the first coupling lens is configured to couple an optical signal emitted by the optical transmitter to the first port.
In one or more embodiments, a second coupling lens is disposed between the optical receiver and the third port, and the second coupling lens is configured to couple an optical signal output from the third port to the optical receiver.
In a second aspect, the present invention provides a bidirectional BOX packaging device, which includes a base and a plurality of bidirectional optical modules arranged on the base in an array manner as described in any of the foregoing embodiments.
Compared with the prior art, the single-fiber bidirectional optical module and the single-fiber bidirectional BOX packaging device provided by the invention have the advantages that through the arrangement of the optical circulator, an optical signal emitted by the optical transmitter can be input into the optical circulator from the first port and output from the second port to be coupled to the optical fiber assembly; an optical signal input by a fiber optic assembly capable of being input into the optical circulator from the second port and output from the third port to be coupled to the fiber optic assembly optical receiver; therefore, the optical transmitter and the optical receiver are integrated on the optical module, so that the manufacturing process flow of the optical module is reduced, and the integration and miniaturization of the optical module are facilitated.
Drawings
Fig. 1 is a schematic structural diagram of a single fiber bi-directional BOX packaged device in accordance with an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a single-fiber bidirectional optical module according to an embodiment of the present invention.
Description of the main reference numbers:
1-base, 2-single-fiber bidirectional optical module, 21-optical circulator, 211-first polarization beam splitting prism group, 2111-first beam splitting surface, 2112-second beam splitting surface, 212-Faraday optical rotation sheet, 213-half wave plate, 214-second polarization beam splitting prism group, 2141-third beam splitting surface, 2142-fourth beam splitting surface, 22-optical transmitter, 23-optical receiver, 24-optical fiber component, 25-heat sink, 26-first coupling lens and 27-second coupling lens.
Detailed Description
The following detailed description of the present invention is provided in conjunction with the accompanying drawings, but it should be understood that the scope of the present invention is not limited to the specific embodiments.
Throughout the specification and claims, unless explicitly stated otherwise, the term "comprise" or variations such as "comprises" or "comprising", etc., will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.
Referring to fig. 1, a bidirectional BOX package device according to an embodiment of the present invention includes a base 1 and a plurality of bidirectional optical modules 2. The plurality of single-fiber bidirectional optical modules 2 are arranged on the base 1 in an array.
In an exemplary embodiment, referring to fig. 2, the bidirectional optical fiber module 2 includes an optical circulator 21, an optical transmitter 22, an optical receiver 23, and an optical fiber assembly 24. The optical circulator 21 comprises a first port, a second port and a third port; the light emitter 22 is disposed corresponding to the first port; the optical receiver 23 is provided corresponding to the third port; the fiber optic assembly 24 is disposed corresponding to the second port. Wherein the optical signal emitted by the optical transmitter 22 can be input into the optical circulator 21 from the first port and output from the second port to be coupled to the optical fiber assembly 24. An optical signal input by the fiber assembly 24 can be input into the optical circulator 21 from the second port and output from the third port to be coupled to the optical receiver 23 of the fiber assembly 24.
In the present embodiment, through the arrangement of the optical circulator 21, the optical signal emitted by the optical transmitter 22 can be input into the optical circulator 21 from the first port and output from the second port to be coupled to the optical fiber assembly 24; an optical signal input by the optical fiber assembly 24, capable of being input into the optical circulator 21 from the second port, and output from the third port to be coupled to the optical receiver 23 of the optical fiber assembly 24; therefore, the optical transmitter 22 and the optical receiver 23 are integrated on one optical module, so that the manufacturing process flow of the optical module is reduced, and the integration and miniaturization of the optical module are facilitated.
Specifically, the optical circulator 21, the optical transmitter 22 and the optical receiver 23 may be fixed to the base 1 by bonding, and the optical fiber assembly 24 may be fixed to the base 1 by welding. The signal receiving form of the optical receiver 23 may be forward receiving, side receiving, or other forms of signal receiving.
In an exemplary embodiment, referring to fig. 2, the optical circulator 21 further includes a first polarization beam splitting prism set 211, a faraday optical rotation plate 212, a half-wave plate 213 and a second polarization beam splitting prism set 214, which are sequentially and parallelly disposed. The optical circulator 21 is capable of outputting an optical signal input from the first port through the second port; and the optical signal inputted from the second port can be outputted through the third port. Half-wave plate 213 may be a single half-wave plate 213 or a multi-plate combination half-wave plate 213.
Specifically, the first polarization splitting prism group 211 includes a first light splitting surface 2111 and a second light splitting surface 2112 which are parallel to each other. The second polarization splitting prism set 214 includes a third light splitting surface 2141 and a fourth light splitting surface 2142 parallel to the first light splitting surface 2111 and the second light splitting surface 2112. The first light splitting surface 2111 and the second light splitting surface 2112 are arranged vertically and oppositely, and the third light splitting surface 2141 and the fourth light splitting surface 2142 are arranged vertically and oppositely; the first light splitting surface 2111 and the third light splitting surface 2141 are arranged to face each other in the horizontal direction, and the second light splitting surface 2112 and the fourth light splitting surface 2142 are arranged to face each other in the horizontal direction.
Further, a first port is disposed corresponding to the first light splitting surface 2111, a second port is disposed corresponding to the third light splitting surface 2141, and a third port is disposed corresponding to the second light splitting surface 2112. After being coupled to the first port, the optical signal emitted by the optical transmitter 22 may pass through the first polarization beam splitting prism set 211, the faraday optical rotation plate 212, the half-wave plate 213, and the second polarization beam splitting prism set 214 in sequence, and then be output from the second port to be coupled to the optical fiber assembly 24. An optical signal input by the optical fiber assembly 24 can pass through the second polarization splitting prism group 214, the half-wave plate 213, the faraday optical rotation plate 212 and the first polarization splitting prism group 211 in sequence from the second port, and then be output from the third port to be coupled to the optical receiver 23.
Further, the first polarization splitting prism group 211 and the second polarization splitting prism group 214 each include two 45 ° right-angle prisms and one 45 ° rhombic prism, and inclined surfaces of the two 45 ° right-angle prisms are respectively glued with two inclined surfaces of the one 45 ° rhombic prism. The first polarizing beam splitting prism group 211 may be coated with a polarizing beam splitting dielectric film on the inclined surfaces of the two 45 ° right-angle prisms, or may be coated with a polarizing beam splitting dielectric film on the two inclined surfaces of the 45 ° rhombic prisms, to form a first beam splitting surface 2111 and a second beam splitting surface 2112. Similarly, the inclined planes of the two 45 ° right-angle prisms of the second polarization splitting prism group 214 may be plated with a polarization splitting dielectric film, or the two inclined planes of the 45 ° rhombic prisms may be plated with a polarization splitting dielectric film, so as to form the third light splitting surface 2141 and the fourth light splitting surface 2142.
In an exemplary embodiment, referring to fig. 2, the optical transmitter 22 includes a laser chip for generating an optical signal, and the optical receiver 23 includes a detector chip for receiving the optical signal. The laser chip and the detector chip are integrated on a heat sink 25. The material of the heat sink 25 is preferably aluminum nitride, which has excellent thermal conductivity and a small thermal expansion coefficient and is a good thermal shock resistant material.
In an exemplary embodiment, referring to fig. 2, a first coupling lens 26 is disposed between the optical transmitter 22 and the first port, and the first coupling lens 26 is used for coupling the optical signal emitted by the optical transmitter 22 to the first port. A second coupling lens 27 is disposed between the optical receiver 23 and the third port, and the second coupling lens 27 is configured to couple the optical signal output from the third port to the optical receiver 23.
The embodiment of the invention also provides a preparation method of the single-fiber bidirectional BOX encapsulation device, which comprises the following steps:
integrating the laser chip of the light emitter 22 and the detector chip of the light receiver 23 onto the heat sink 25 to form a transmitting-receiving integrated unit;
the transmitting and receiving integrated unit and the optical circulator 21 are fixedly bonded on the base 1;
the first coupling lens 26 is coupled and fixed on the base 1 in an adhering way, so that the optical signal emitted by the laser chip can be coupled to the first port of the optical circulator 21 through the first coupling lens 26;
coupling the optical fiber assembly 24 with the second port of the optical circulator 21, and welding the optical fiber assembly 24 on the base 1;
the second coupling lens 27 is coupled and adhesively fixed to the base 1, so that the optical signal output from the third port of the optical circulator 21 can be coupled to the detector chip of the optical receiver 23 through the second coupling lens 27.
The present invention will be further described with reference to specific scenarios.
Referring to fig. 2, the dashed arrow in fig. 2 indicates the optical path. The optical signal is emitted by the laser chip of the optical transmitter 22, coupled to the first port of the optical circulator 21 through the first coupling lens 26, and then transmitted to the second port to be coupled into the optical fiber assembly 24 through the first light splitting surface 2111, the faraday rotation plate 212, the half wave plate 213, and the second light splitting surface 2112 in sequence, thereby implementing transmission of the emitted signal.
An optical signal input by the optical fiber assembly 24 enters the second port of the optical circulator 21, then is reflected to the fourth light splitting surface 2142 through the third light splitting surface 2141, is reflected by the fourth light splitting surface 2142, then sequentially passes through the half-wave plate 213, the faraday rotation plate 212 and the second light splitting surface 2112, is transmitted to the third port for output, and is coupled to the detector chip of the optical receiver 23 through the second coupling lens 27, so that the optical signal is received.
The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications. It is intended that the scope of the invention be defined by the claims and their equivalents.

Claims (10)

1. A single-fiber bi-directional optical module, comprising:
an optical circulator comprising a first port, a second port, and a third port;
a light emitter disposed corresponding to the first port;
an optical receiver disposed corresponding to the third port;
a fiber optic assembly disposed corresponding to the second port;
wherein an optical signal emitted by the optical transmitter can be input into the optical circulator from the first port and output from the second port to be coupled to the optical fiber assembly;
and the optical signal input by the optical fiber assembly can be input into the optical circulator from the second port and output from the third port to be coupled to the optical receiver of the optical fiber assembly.
2. The bi-directional optical fiber module of claim 1, wherein the optical circulator further comprises a first polarization beam splitting prism set, a faraday optical rotation plate, a half-wave plate and a second polarization beam splitting prism set arranged in sequence.
3. The bi-directional optical fiber module of claim 2 wherein said first polarization beam splitting prism assembly includes a first beam splitting surface and a second beam splitting surface that are parallel to each other, and said second polarization beam splitting prism assembly includes a third beam splitting surface and a fourth beam splitting surface that are parallel to said first beam splitting surface and said second beam splitting surface.
4. The bi-directional optical transceiver of claim 3 wherein said first port is disposed in correspondence with said first light splitting surface, said second port is disposed in correspondence with said third light splitting surface, and said third port is disposed in correspondence with said second light splitting surface.
5. The bi-directional optical subassembly of claim 4 wherein the first polarization splitting prism set and the second polarization splitting prism set each comprise two 45 ° right-angle prisms and one 45 ° rhombic prism, and wherein the inclined surfaces of the two 45 ° right-angle prisms are respectively cemented with the two inclined surfaces of the one 45 ° rhombic prism.
6. The bi-directional optical fiber module of claim 1 wherein the optical transmitter includes a laser chip and the optical receiver includes a detector chip, the laser chip and the detector chip being integrated on a heat sink.
7. The bi-directional optical transceiver of claim 6, wherein the heat sink is made of aluminum nitride.
8. The bi-directional optical fiber module of claim 1, wherein a first coupling lens is disposed between the optical transmitter and the first port, the first coupling lens being configured to couple an optical signal emitted by the optical transmitter to the first port.
9. The bi-directional optical fiber module of claim 8, wherein a second coupling lens is disposed between the optical receiver and the third port, the second coupling lens being configured to couple an optical signal output from the third port to the optical receiver.
10. A BOX packaging device with single fiber bi-directional, comprising a base and a plurality of bi-directional optical modules according to any one of claims 1 to 9 arranged in an array on the base.
CN202210909877.7A 2022-07-29 2022-07-29 Single-fiber bidirectional optical module and single-fiber bidirectional BOX packaging device Withdrawn CN115185041A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210909877.7A CN115185041A (en) 2022-07-29 2022-07-29 Single-fiber bidirectional optical module and single-fiber bidirectional BOX packaging device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210909877.7A CN115185041A (en) 2022-07-29 2022-07-29 Single-fiber bidirectional optical module and single-fiber bidirectional BOX packaging device

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CN115185041A true CN115185041A (en) 2022-10-14

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