CN111399142A - Bidirectional optical device and optoelectronic apparatus - Google Patents
Bidirectional optical device and optoelectronic apparatus Download PDFInfo
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- CN111399142A CN111399142A CN202010410169.XA CN202010410169A CN111399142A CN 111399142 A CN111399142 A CN 111399142A CN 202010410169 A CN202010410169 A CN 202010410169A CN 111399142 A CN111399142 A CN 111399142A
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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
- G02B6/4287—Optical modules with tapping or launching means through the surface of the waveguide
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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
- 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
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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
- 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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- 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
Abstract
The invention provides a bidirectional optical device and photoelectric equipment, and relates to the technical field of photoelectricity. The bidirectional optical device comprises an optical platform, an optical fiber socket and an optical splitter; a light emitting component and a light receiving component are respectively arranged on two sides of the optical platform; the optical output signal output by the optical transmitting component passes through the optical splitter in a first optical path and is output by the optical fiber socket; the optical input signal received by the optical fiber socket is input into the optical receiving component through the optical splitter in the second optical path, so that the problem of large size of the conventional BIDI optical device is solved.
Description
Technical Field
The invention relates to the technical field of photoelectricity, in particular to a bidirectional optical device and photoelectric equipment.
Background
With the continuous development of the optoelectronic technology, the optical module has become an important component of the modern optical communication network. The optical device is a core of the optical module, and a Bidirectional (BIDI) optical device can greatly save the cost of an optical fiber because a received optical signal and a transmitted optical signal share the same optical fiber, so that the optical device is widely used in Passive Optical Networks (PONs) and wireless communication networks.
Conventional multi-wavelength BIDI optical devices generally employ multi-Transistor Out-line (TO) packaged optical components and multi-component optical devices TO form multi-channel BIDI optical devices. As shown in fig. 1, in the conventional BIDI optical device, two optical output modules 1, two optical input modules 2, three light splitting devices 3, and one reflecting mirror 4 are used in common. It can be seen that each additional optical output module 1 or optical input module 2 requires the addition of a light splitting device 3, and as the number of optical channels increases, the volume of the BIDI optical device increases, so that the conventional BIDI optical device has a problem of larger size.
Disclosure of Invention
The invention aims to provide a bidirectional optical device and an optoelectronic device, which are used for solving the problem that the conventional BIDI optical device is large in size.
In a first aspect, an embodiment of the present invention provides a bidirectional optical device, including an optical platform, an optical fiber socket, and an optical splitter;
a light emitting component and a light receiving component are respectively arranged on two sides of the optical platform;
the optical output signal output by the optical transmitting component passes through the optical splitter in a first optical path and is output by the optical fiber socket;
the optical input signal received by the optical fiber socket is input into the optical receiving component in a second optical path through the optical splitter.
Further, the light emitting assembly includes a plurality of laser diodes, a plurality of collimating lenses, and an optical multiplexer;
and the optical signals output by the laser diodes are input into the optical multiplexer through the collimating lenses respectively, and are combined into one path of optical output signal through the optical multiplexer to be output.
Further, the light receiving module includes a plurality of photodiodes, a plurality of collimating lenses, and an optical demultiplexer;
the optical input signal input to the optical demultiplexer is decomposed into a plurality of optical signals through the optical demultiplexer, and the plurality of optical signals are input to the photodiodes through the plurality of collimating lenses respectively.
Further, the light splitting device is a dichroic filter;
a light output signal output by the light emitting assembly transmitted by the dichroic filter in a first optical path;
an optical input signal received by the fiber optic receptacle is reflected by the dichroic filter in a second optical path.
Further, the first light path includes a prism;
the optical output signal is reflected twice by the prism, transmitted by the dichroic filter and output through the optical fiber socket.
Further, the second optical path includes a mirror;
the optical input signal is reflected by the dichroic filter, reflected by the reflector and input to the optical receiving component.
Further, the bidirectional optical device further comprises an optical chip, and the light emitting component and the light receiving component are connected with the optical chip.
Further, the bidirectional optical device also comprises a trans-impedance amplifier connected with the optical receiving component.
Further, the light splitting device is a circulator.
In a second aspect, an embodiment of the present invention further provides an optoelectronic device, including the bidirectional optical device described above.
The bidirectional optical device provided by the embodiment of the invention comprises an optical platform, an optical fiber socket and an optical splitter, wherein a light emitting component and a light receiving component are respectively arranged on two sides of the optical platform. When the bidirectional optical device works, an optical output signal output by the optical transmitting component is output by the optical fiber socket through the optical splitter in the first optical path; the optical input signal received by the optical fiber socket is input into the optical receiving component through the optical splitting device in the second optical path. In the embodiment of the invention, the optical platform and the light splitting device are used for separating the light emitting component from the light receiving component and the light paths of the light receiving component, so that all the light paths share one light splitting device. When the number of optical channels needs to be increased, the number of optical channels can be increased in the light emitting module or the light receiving module without increasing the number of light splitting devices, thereby alleviating the problem of the large size of the existing BIDI optical device.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic diagram of a prior art bi-directional optical device;
fig. 2 is a schematic diagram of one side of a light emitting assembly of a bi-directional optical device according to an embodiment of the present invention;
fig. 3 is a schematic diagram of one side of a light receiving assembly of a bidirectional optical device according to an embodiment of the present invention;
fig. 4 is a schematic perspective view of a bidirectional optical device provided in an embodiment of the present invention;
fig. 5 is another perspective view of the bidirectional optical device according to the embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of 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.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
With the continuous development of the optoelectronic technology, the optical module has become an important component of the modern optical communication network. The optical device is the core of the optical module, and the BIDI optical device can greatly save the cost of the optical fiber because the receiving optical signal and the sending optical signal share the same optical fiber, so that the BIDI optical device is widely used in a Passive Optical Network (PON) and a wireless communication network.
Conventional multi-wavelength BIDI optical devices typically employ multiple TO-packaged optical packages and multi-component optical devices TO form a multi-channel BIDI optical device. In the conventional BIDI optical device, two optical output modules, two optical input modules, three optical splitters, and one mirror are used in common. However, the traditional TO scheme has inherent problems which are difficult TO solve, for example, the optical device is an anisotropic piece, the shape is very complex, and the processing difficulty is high. The optical assembly is composed of a plurality of TO, the external dimension is large, the fan-out of radio frequency signals is very complex, and the optical assembly is difficult TO be compatible with a Chip On Board (COB) process with low cost. Each additional optical output module or optical input module requires an additional optical splitter, and as the number of optical channels increases, the volume of the BIDI optical device increases, so that the conventional BIDI optical device has a problem of larger size.
In view of the above requirements and problems, embodiments of the present invention provide a BIDI optical device and an optoelectronic apparatus, which can effectively reduce the size of a multi-channel BIDI optical device and can be compatible with a low-cost COB packaging process.
As shown in fig. 2 to fig. 5, an embodiment of the present invention provides a bidirectional optical device, which includes an optical platform 100, a fiber receptacle 101, and an optical splitter, where two sides of the optical platform 100 are respectively provided with a light emitting module and a light receiving module, and the fiber receptacle 101 is used for connecting an optical fiber.
Fig. 2 and 4 show portions of one side of an optical transmit assembly, the optical output signal from which is output by the fiber optic receptacle 101 via the pass-through device in a first optical path. As shown in fig. 3 and 5, the optical input signal received by the fiber optic receptacle 101 is input to the optical receiving module via the optical splitting device in the second optical path.
In one possible embodiment, the light splitting device is a dichroic filter 102. The dichroic filter 102 can transmit or reflect light of different wavelengths to achieve spectral splitting. Dichroic filters 102 can be generally divided into two categories, long-pass dichroic filters capable of reflecting light below a cut-off wavelength while transmitting light above the cut-off wavelength; short-pass dichroic filters, in contrast, are capable of transmitting light below the cut-off wavelength while reflecting light above the cut-off wavelength.
In an embodiment of the present invention, the light output signal from the light emitting element is transmitted by the dichroic filter 102 in the first optical path. The optical input signal received by the fiber optic receptacle 101 is reflected by the dichroic filter 102 in the second optical path. For example, with the long pass dichroic filter used in this embodiment, the wavelength of the optical output signal is above the cut-off wavelength and the wavelength of the optical input signal is below the cut-off wavelength. Alternatively, a short pass dichroic filter is used in this embodiment, the wavelength of the optical output signal is below the cut-off wavelength and the wavelength of the optical input signal is above the cut-off wavelength.
In one possible embodiment, the Optical transmitting module includes a plurality of laser diodes (L as Diode, L D)21, a plurality of collimating lenses 22 and an Optical Multiplexer (OMUX) 23, wherein Optical signals output from the plurality of laser diodes 21 are respectively input to the Optical Multiplexer 23 through the plurality of collimating lenses 22, and are combined into one Optical output signal by the Optical Multiplexer 23.
In one possible embodiment, the light receiving assembly includes a plurality of Photodiodes (PDs) 31, a plurality of collimating lenses 32, and an Optical Demultiplexer (ODMUX) 33. The optical input signal input to the optical demultiplexer 33 is decomposed into a plurality of optical signals by the optical demultiplexer 33, and is input to the plurality of photodiodes 31 through the plurality of collimator lenses 32.
The laser diode 21 is a semiconductor diode, and can be classified into homojunction, single heterojunction, double heterojunction, and quantum well laser diodes according to whether PN junction materials are the same. The quantum well laser diode has the advantages of low threshold current and high output power, and is a mainstream product in most application scenes at present. The photodiode 31 is a semiconductor device composed of a PN junction, like a general semiconductor diode, and has a unidirectional conductive characteristic. The photodiode works under the action of reverse voltage, and when no light is emitted, reverse current is extremely weak and is called dark current; in the presence of light, the reverse current rapidly increases to tens of microamperes, referred to as photocurrent. The greater the intensity of the light, the greater the reverse current. The change in light causes a change in the current of the photodiode 31, and thus an optical signal can be converted into an electrical signal, which becomes a photoelectric sensor device.
The optical multiplexer 23 is capable of combining a series of optical signals carrying information but having different wavelengths into a single bundle for transmission along a single optical fiber. Accordingly, the optical demultiplexer 33 can separate optical signals of different wavelengths from a single optical fiber. This technique allows multiple signals to be simultaneously transmitted over an optical fiber, each signal being carried by light of a particular wavelength, i.e., a wavelength channel.
The embodiment of the invention simultaneously enables two or more optical wavelength signals to respectively transmit information through different optical channels in the same optical fiber, namely the optical wavelength division multiplexing technology. The optical wavelength division multiplexing includes frequency division multiplexing and wavelength division multiplexing, and there is no obvious difference between the two, because the optical wave is an electromagnetic wave, and the frequency and the wavelength of the light have a single correspondence. It is also understood that optical frequency division multiplexing refers to the subdivision of optical frequencies, with very dense optical channels; optical wavelength division multiplexing refers to the coarse division of optical frequencies, where the optical channels are far apart, even at different windows of the optical fiber.
In the embodiment of the present invention, the optical platform 100 and the dichroic filter 102 are used as light splitting devices to separate the light emitting component from the light receiving component and the light paths thereof, so that all the light paths share one dichroic filter 102. When the number of optical channels needs to be increased, it is possible to increase in the light emitting module or the light receiving module without increasing the number of dichroic filters 102, thereby alleviating the problem of the large size of the conventional bidirectional optical device.
In one possible embodiment, as shown in fig. 2 and 4, the first optical path includes a prism 24, and the optical output signal is reflected twice by the prism 24, transmitted through a dichroic filter 102, and output through a fiber optic receptacle 101.
In one possible embodiment, as shown in fig. 3 and 5, the second optical path includes a mirror 34, and the optical input signal is reflected by the dichroic filter 102, reflected by the mirror 34, and input to the light receiving component.
The transmission of bi-directional optical signals within one optical fiber is achieved by providing the prism 24 and the mirror 34 in the first optical path and the second optical path, respectively, such that the optical output signal and the optical input signal are transmitted and reflected by the dichroic filter 102, respectively.
Further, the bidirectional optical device provided in the embodiment of the present invention further includes a trans-impedance amplifier (TIA) 103 connected to the optical receiving component. The transimpedance amplifier 103 is one of operational amplifiers, and since the dimension of the ratio of the output to the input is resistance, it is called a transimpedance amplifier 103, which is commonly used as a front-end amplifier of an optical sensor, and converts the output current of the sensor into a voltage.
Further, the bidirectional optical device further includes an optical chip (not shown), a laser diode in the light emitting module, and a photodiode in the light receiving module, all connected to the optical chip, and the transimpedance amplifier 103 also belongs to a part of the optical chip. The optical signals passing through each laser diode and each photodiode are modulated or read by the optical chip, so that the complexity of radio frequency signal fan-out is reduced by arranging the optical chip, and the bidirectional optical device can be compatible with a COB (chip on board) process. In the COB process, a silicon chip mounting point is covered by heat-conducting epoxy resin on the surface of a substrate, then the silicon chip is directly mounted on the surface of the substrate, heat treatment is carried out until the silicon chip is firmly fixed on the substrate, and then electrical connection is directly established between the silicon chip and the substrate by using a wire bonding method. COB semiconductor chips are mounted on the printed wiring board by being transferred, and electrical connection between the chips and the substrate is achieved by a lead stitching method and is covered with resin to ensure reliability.
In another possible embodiment, the beam splitting device may also employ a circulator. A circulator is a multi-port device in which the transmission of electromagnetic waves can only circulate in one direction, with isolation in the opposite direction. Since the optical signal is also an electromagnetic wave, a circulator can be used as the optical splitting device in the embodiment of the present invention to separate the optical signals of different wavelengths.
The embodiment of the invention also provides the photoelectric equipment. The optoelectronic device may be a fiber optic terminal closure, a fiber optic access device, a fiber optic connector, etc., including one or more of the bidirectional optical devices provided by the embodiments of the present invention described above.
The optoelectronic device provided by the embodiment of the present invention has the same technical features as the bidirectional optical device provided by the above embodiment, so that the same technical problems can be solved, and the same technical effects can be achieved.
In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships that are conventionally arranged when the products of the present invention are used, and are used for convenience of description and simplicity of description only, and do not indicate or imply that the devices or elements indicated must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as meaning either a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working process of the system described above may refer to the corresponding process in the foregoing embodiment of the apparatus, and is not described herein again.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A bidirectional optical device is characterized by comprising an optical platform, an optical fiber socket and an optical splitter;
a light emitting component and a light receiving component are respectively arranged on two sides of the optical platform;
the optical output signal output by the optical transmitting component passes through the optical splitter in a first optical path and is output by the optical fiber socket;
the optical input signal received by the optical fiber socket is input into the optical receiving component in a second optical path through the optical splitter.
2. The bi-directional optical device of claim 1, wherein the optical transmission assembly comprises a plurality of laser diodes, a plurality of collimating lenses, and an optical multiplexer;
and the optical signals output by the laser diodes are input into the optical multiplexer through the collimating lenses respectively, and are combined into one path of optical output signal through the optical multiplexer to be output.
3. The bi-directional optical device of claim 1, wherein the light receiving assembly comprises a plurality of photodiodes, a plurality of collimating lenses, and an optical demultiplexer;
the optical input signal input to the optical demultiplexer is decomposed into a plurality of optical signals through the optical demultiplexer, and the plurality of optical signals are input to the photodiodes through the plurality of collimating lenses respectively.
4. The bi-directional optical device of claim 1, wherein the light splitting device is a dichroic filter;
a light output signal output by the light emitting assembly transmitted by the dichroic filter in a first optical path;
an optical input signal received by the fiber optic receptacle is reflected by the dichroic filter in a second optical path.
5. The bi-directional optical device of claim 4, wherein the first optical path comprises a prism;
the optical output signal is reflected twice by the prism, transmitted by the dichroic filter and output through the optical fiber socket.
6. The bi-directional optical device of claim 4, wherein the second optical path comprises a mirror;
the optical input signal is reflected by the dichroic filter, reflected by the reflector and input to the optical receiving component.
7. The bi-directional optical device of claim 1, further comprising an optical chip, wherein the light emitting assembly and the light receiving assembly are connected to the optical chip.
8. The bi-directional optical device of claim 1, further comprising a transimpedance amplifier connected to the optical receiving component.
9. The bi-directional optical device of claim 1, wherein the optical splitting device is a circulator.
10. An optoelectronic device comprising a bi-directional optical device as claimed in any one of claims 1 to 9.
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| CN202010410169.XA CN111399142A (en) | 2020-05-13 | 2020-05-13 | Bidirectional optical device and optoelectronic apparatus |
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| CN202010410169.XA CN111399142A (en) | 2020-05-13 | 2020-05-13 | Bidirectional optical device and optoelectronic apparatus |
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| CN208421302U (en) * | 2018-07-28 | 2019-01-22 | 福建天蕊光电有限公司 | A kind of single fiber bi-directional multi-wavelength light transmitting-receiving subassembly |
| CN208872907U (en) * | 2018-10-23 | 2019-05-17 | 福州高意通讯有限公司 | A kind of highly integrated hybrid device |
| CN110024308A (en) * | 2017-03-23 | 2019-07-16 | 华为技术有限公司 | Two-way optical assembly, optical network unit, optical line terminal and passive optical network |
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2020
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20180306987A1 (en) * | 2015-12-30 | 2018-10-25 | Huawei Technologies Co., Ltd. | Bidirectional Optical Sub Assembly |
| CN108535821A (en) * | 2017-03-01 | 2018-09-14 | 陈佩娟 | OSA structures coexist in a kind of multi-wavelength |
| CN110024308A (en) * | 2017-03-23 | 2019-07-16 | 华为技术有限公司 | Two-way optical assembly, optical network unit, optical line terminal and passive optical network |
| CN208421302U (en) * | 2018-07-28 | 2019-01-22 | 福建天蕊光电有限公司 | A kind of single fiber bi-directional multi-wavelength light transmitting-receiving subassembly |
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Application publication date: 20200710 |