CN109459823A - A kind of wavelength division multiplexer and its optical module - Google Patents
A kind of wavelength division multiplexer and its optical module Download PDFInfo
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- CN109459823A CN109459823A CN201811551400.6A CN201811551400A CN109459823A CN 109459823 A CN109459823 A CN 109459823A CN 201811551400 A CN201811551400 A CN 201811551400A CN 109459823 A CN109459823 A CN 109459823A
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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
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
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Abstract
The present invention relates to technical field of optical fiber communication, more particularly to a kind of wavelength division multiplexer and its optical module, comprising: planar optical waveguide substrate, the waveguide paths for being conducted to optical signal are equipped in the planar optical waveguide substrate, the quantity of the waveguide paths is two sections or more, is respectively main waveguide paths and complementary wave guiding path；Two ends of the main waveguide paths are connected to multi-wavelength mixed signal port and the first specific wavelength signal port respectively, are equipped with optical filter in the main waveguide paths；The first end of the complementary wave guiding path is connected to another specific wavelength signal port, and second end and the reflecting surface of the optical filter are connected to each other；Multi-wavelength mixed signal port and all specific wavelength signal ports are all set on the side of the planar optical waveguide substrate；The present invention is based on waveguide paths plasticity with higher, so that the position of the interface end to connect with waveguide paths can freely be designed according to the demand of manufacturer, provide a great convenience for the exploitation design of product.
Description
Technical field
The present invention relates to technical field of optical fiber communication, and in particular to a kind of wavelength division multiplexer and a kind of optical module.
Background technique
With higher and higher to the requirement of communication bandwidth in fiber optic communication field, whole world optic communication at present is in one and flies
Fast developing period.And in high-speed data communication field, due to the rate limit of electrical transmission, for transmission rate request 40/
The Networks of Fiber Communications of 100/200/400Gbps rate, in order to ensure data can long range high-speed transfer, lead in the prior art
Frequently with optical module, such as: optical transmitter module and optical receiver module are generally adopted with realizing the transmitting and reception of different wavelengths of light
Solution is to be multiplexed the optical signal of multichannel different wave length to transmit in single mode optical fiber, specifically, light emitting mould
The optical signal of multichannel different wave length is multiplexed and is transferred to optical receiver module by single mode optical fiber by block, and optical receiver module is demultiplexed again
This few wavelength；To meet the signal transmission rate requirement of 40/100/200/400Gbps.
In the prior art, in order to meet optical signal multiplexing the needs of；There is a kind of wavelength division multiplexer on the market now,
Upper filter is installed on the position of wavelength division multiplexer two sides port, so that light wave realizes the selection point of wavelength at optical filter
Road, to realize multiple wavelength channels multiplex/demultiplex functions.But in the structure of this product, the direction of propagation of optical signal
Only be adjusted by optical filter, thus its limited by optical path it is larger so that installation site of the optical filter on wavelength division multiplexer
Also compare fixation, therefore when designing wavelength division multiplexer, integrally-built plasticity is poor, is not easy to the exploitation design of product.
Summary of the invention
To overcome drawbacks described above, the purpose of the present invention is to provide a kind of based on Planar Lightwave Circuit Technology offer more bloom
The wavelength division multiplexer of road plasticity and its optical module.
The purpose of the present invention is achieved through the following technical solutions:
The present invention is a kind of wavelength division multiplexer comprising:
Planar optical waveguide substrate, the waveguide being equipped in the planar optical waveguide substrate for being conducted to optical signal are logical
The quantity on road, the waveguide paths is two sections or more, is respectively main waveguide paths and complementary wave guiding path；The main waveguide paths
Two ends be connected to multi-wavelength mixed signal port and specific wavelength signal port respectively, be equipped with and filter in the main waveguide paths
Piece；The first end of the complementary wave guiding path is connected to another specific wavelength signal port, second end and the optical filter
Reflecting surface be connected to each other；Multi-wavelength mixed signal port and specific wavelength signal port are all set in the planar optical waveguide
On the side of substrate.
The present invention is a kind of optical module comprising: optical signal prosessing device and wavelength division multiplexer as described above, the wave
The multi-wavelength mixed signal port of division multiplexer is connected with optical fiber, and all specific wavelength signal ports are and at the optical signal
Reason device is connected.
The present invention is provided with the waveguide paths of two-way or more in planar optical waveguide substrate, and is equipped in waveguide paths
Filter plate enables the light wave of different wave length by corresponding waveguide paths, to realize that its multiple wavelength channels is multiplexed/demultiplexes
Use function；And due to waveguide paths plasticity with higher, therefore the position of the interface end to connect with waveguide paths can basis
The demand of manufacturer and freely design, for product exploitation design provide a great convenience.
Detailed description of the invention
The present invention is described in detail by following preferred embodiments and attached drawing for ease of explanation,.
Fig. 1 is the principle schematic diagram of wavelength division multiplexer one embodiment of the present invention；
Fig. 2 is the partial structural diagram of wavelength division multiplexer of the present invention；
Fig. 3 is the principle schematic diagram of another embodiment of wavelength division multiplexer of the present invention.
Label declaration: 1, planar optical waveguide substrate；2, main waveguide paths；3, the first complementary wave guiding path；4, the second complementary wave is led
Access；5, third complementary wave guiding path；6, the first optical filter；7, the second optical filter；8, third optical filter；A, multi-wavelength mixed signal
Port；B, the first specific wavelength signal port；C, the second specific wavelength signal port；D, third specific wavelength signal port；E,
4th specific wavelength signal port.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further described.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and do not have to
It is of the invention in limiting.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise " is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of
The description present invention and simplified description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with spy
Fixed orientation construction and operation, therefore be not considered as limiting the invention.In addition, term " first ", " second " are only used for
Purpose is described, relative importance is not understood to indicate or imply or implicitly indicates the quantity of indicated technical characteristic.
" first " is defined as a result, the feature of " second " can explicitly or implicitly include one or more feature.?
In description of the invention, the meaning of " plurality " is two or more, unless otherwise specifically defined.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected.It can
To be mechanical connection, it is also possible to be electrically connected.It can be directly connected, can also can be indirectly connected through an intermediary
The interaction relationship of connection or two elements inside two elements.It for the ordinary skill in the art, can be with
The concrete meaning of above-mentioned term in the present invention is understood as the case may be.
Fig. 1 to Fig. 2 is please referred to, a kind of wavelength division multiplexer of the invention is specifically described with one embodiment below,
Comprising:
Planar optical waveguide substrate 1, the planar optical waveguide substrate 1 is by glass/silica (Quartz/Silica/
SiO2), lithium niobate (LiNbO3), III-V semiconductor compound (such as InP, GaAs etc.), the silicon (Silicon- on insulator
On-Insulator, SOI/SIMOX), silicon oxynitride (SiON), the materials such as high molecular polymer (Polymer) constitute；The base
Be equipped with waveguide paths for being conducted to optical signal in bottom, the present invention by the substrate to the anaclasis of predefined paths
Rate is adjusted, so that optical signal realizes total reflection phenomenon in the predefined paths, which is waveguide paths；In turn
Optical signal is set to be propagated along the waveguide paths；The quantity of the waveguide paths is two sections or more, is respectively that main waveguide is logical
Road 2 and complementary wave guiding path；It is specific that two ends of the main waveguide paths 2 are connected to multi-wavelength mixed signal port A and first respectively
Wavelength signals port B is equipped with the first optical filter 6 in the main waveguide paths 2；The optical filter can make the optical signal of specific wavelength saturating
It crosses, and the optical signal of its commplementary wave length is reflected；The first end of the complementary wave guiding path is connected to another specific wavelength
Signal port, second end and the reflecting surface of first optical filter 6 are connected to each other；Multi-wavelength mixed signal port A and
All specific wavelength signal ports are all set on the side of the planar optical waveguide substrate 1；Wherein, multi-wavelength mixing letter
Number port A is used for transmission the optical signal containing the mixing of two or more wavelength, such as: the mixed signal of λ 1, λ 2, λ 3, λ 4, and each spy
Determine wavelength signals port to be then connected to each other with optical signal prosessing device, be used for transmission a kind of optical signal of wavelength, such as: λ 1；And it is every
The wavelength for the optical signal that a specific wavelength signal port is transmitted is all different.Since optical waveguide is that guidance light wave is propagated wherein
Medium apparatus, also known as dielectric optical waveguide.Wherein, optical waveguide has two major classes: one kind is integrated light guide, including planar medium light
Waveguide and slab dielectric optical waveguide, they are usually all a part in integrated optoelectronic device, so being called integrated light guide；Separately
One kind is cylindrical light waveguide, commonly referred to as optical fiber；Since optical fiber is identical as the transmission principle of planar optical waveguide, therefore it is each other
Coupling efficiency it is higher.
In the present embodiment, the quantity of the complementary wave guiding path be three or more, be respectively the first complementary wave guiding path 3,
Second complementary wave guiding path 4 and third complementary wave guiding path 5；The first complementary wave guiding path 3, the second complementary wave guiding path 4 and third pair
The first end of waveguide paths 5 respectively with the second specific wavelength signal port C, third specific wavelength signal port D, the 4th special
Determine wavelength signals port E to be connected；The second optical filter 7 and third filter are respectively equipped in the first, second complementary wave guiding path 4
Mating plate 8；The reflecting surface phase of the second end of the first complementary wave guiding path 3 and the first optical filter 6 in the main waveguide paths 2
Docking；The reflection of the second optical filter 7 in the second end of the second complementary wave guiding path 4 and the first complementary wave guiding path 3
Face is connected to each other；The second end of the third complementary wave guiding path 5 and the third optical filter 8 in the second complementary wave guiding path 4
Reflecting surface is connected to each other.
Below by taking the wavelength-division multiplex of four wavelength as an example, have to the course of work of the wavelength division multiplexer in the present embodiment
Body description；
Wavelength division multiplexer in the present embodiment is by planar optical waveguide substrate 1, main waveguide paths 2, the first complementary wave guiding path 3,
Second complementary wave guiding path 4, third complementary wave guiding path 5, the first optical filter 6, the second optical filter 7, third optical filter 8 are composed.
Wherein main waveguide paths 2 respectively have a port in 1 two sides of planar optical waveguide substrate, be respectively multi-wavelength mixed signal port A and
First specific wavelength signal port B, it is λ 1, λ 2, λ 3, λ that wherein multi-wavelength mixed signal port A and optical fiber, which are connected to each other input wavelength,
The optical signal of 4 optical signal, four wavelength is advanced along main waveguide paths 2, and when encountering the first optical filter 6,1 wavelength light of λ letter
Transmission occurs number in the first optical filter 6 and is exported from the first specific wavelength signal port B, and the optical signal of λ 2, λ 3, λ 4 are by the
One optical filter 6 is reflected into inside the first complementary wave guiding path 3 and transmits, when three wavelength channels encounter the second optical filter 7, λ 2
Transmission occurs in the second optical filter 7 and exports from the second specific wavelength signal port C, the optical signal of λ 3, λ 4 for wavelength channels
It is reflected into inside the second complementary wave guiding path 4 and transmits by the second optical filter 7, when two wavelength channels encounter third optical filter 8
When, 3 wavelength channels of λ are penetrated in third optical filter 8 thoroughly and are exported from third specific wavelength signal port D, the light letter of λ 4
It number is reflected into transmission inside third complementary wave guiding path 5 to export from the 4th specific wavelength signal port E, to reach λ 1, λ
2, λ 3,4 three wavelength of λ optical signal demultiplexing purpose；The reverse transmission of this process can be regarded as optical signal multiplex process,
That is λ 1, λ 2, λ 3, the optical signal of λ 4 are special from the first specific wavelength signal port B, the second specific wavelength signal port C, third respectively
Determine wavelength signals port D, the 4th specific wavelength signal port E is input in the planar optical waveguide substrate 1, and mixed from its multi-wavelength
Signal port A is closed to export into optical fiber.
Below again by taking third optical filter 8 as an example, the working principle of optical filter is described, specifically:
Wavelength is λ 3, the optical signal of λ 4 is transmitted along the second complementary wave guiding path 4, since third optical filter 8 is coated with to the anti-of λ 4
Film is penetrated, therefore the optical signal that wavelength is λ 4 is reflected into third complementary wave guiding path 5 finally from the 4th specific wavelength signal port E by it
Output, and since third optical filter 8 is coated with the transmission film to λ 3 simultaneously, wavelength is that the optical signal of λ 3 is transmitted through third at this time
Optical filter 8, which continues to transmit along the second complementary wave guiding path 4, finally to be exported from third specific wavelength signal port D.
In the present embodiment, the first angle theta 1, the complementary wave conducting are formed between the main waveguide paths 2 and optical filter
The second angle theta 2 is formed between road second end and optical filter, first angle theta 1 is equal with the angle of the second angle theta 2.
It can guarantee that entering the first complementary wave guiding path 3 after the incident light reflection of main waveguide paths 2 transmits in this way.
In the present embodiment, the thickness of the optical filter is less than 50 microns.Due to optical filter same meeting in addition to partial wave acts on
Refraction action is generated to optical path, so the thickness of optical filter thin as far as possible will just can guarantee lesser insertion loss, in the present embodiment
The middle thickness design by optical filter is to cooperate index matching glue to can achieve 0.5dB hereinafter, simultaneously using Insertion Loss less than 50 microns
And the optical filter made of quartz glass or polymer material can accomplish the ultra-thin optical filter of these level.
In the present embodiment, slot is equipped in the planar optical waveguide substrate 1, the optical filter grafting installation is inserted with described
In slot.It is specially optical filter to be inserted into fluting, and pour into index matching glue in slot and solidified, to minimize light
The insertion loss due to caused by refractive index abrupt change when signal passes through optical filter.
In order to preferably understand the present invention, below with another embodiment to a kind of wavelength division multiplexer of the invention
It is specifically described, please refers to Fig. 3 comprising:
Planar optical waveguide substrate 1, the waveguide paths for being conducted to optical signal are equipped in the substrate, and the present invention is logical
It crosses and the optical index of predefined paths is adjusted in the substrate, so that optical signal realizes that total reflection is existing in the predefined paths
As the predefined paths are waveguide paths；And then optical signal is enable to be propagated along the waveguide paths；The number of the waveguide paths
Amount is two sections or more, is respectively main waveguide paths 2 and complementary wave guiding path；Two ends of the main waveguide paths 2 are connected to respectively
Multi-wavelength mixed signal port A and the first specific wavelength signal port B is equipped with the first optical filter 6 in the main waveguide paths 2；
The optical filter can be such that the optical signal of specific wavelength penetrates, and reflect the optical signal of its commplementary wave length；The complementary wave guiding path
First end be connected to a specific wavelength signal port, second end and the reflecting surface of first optical filter 6 are connected to each other；
Multi-wavelength mixed signal port A and all specific wavelength signal ports are all set in the side of the planar optical waveguide substrate 1
On face；Wherein, multi-wavelength mixed signal port A be used for transmission containing two or more wavelength mixing optical signal, such as: λ 1, λ 2,
The mixed signal of λ 3, λ 4, and each specific wavelength signal port is then connected to each other with optical signal prosessing device, is used for transmission one kind
The optical signal of wavelength, such as: λ 1；And the wavelength of optical signal that each specific wavelength signal port is transmitted is all different.
In the present embodiment, the quantity of the complementary wave guiding path be three or more, be respectively the first complementary wave guiding path 3,
Second complementary wave guiding path 4 and third complementary wave guiding path 5；The first complementary wave guiding path 3, the second complementary wave guiding path 4 and third pair
The first end of waveguide paths 5 respectively with the second specific wavelength signal port C, third specific wavelength signal port D, the 4th specific
Wavelength signals port E is connected.The first secondary optical filter and the second secondary optical filter are additionally provided in the main waveguide paths 2；Described
The second end of one complementary wave guiding path 3 and the reflecting surface of the optical filter in the main waveguide paths 2 are connected to each other；Second complementary wave
The second end of guiding path 4 and the reflecting surface of the first secondary optical filter are connected to each other；The second end of the third complementary wave guiding path 5 with
The reflecting surface of second secondary optical filter is connected to each other.
The working principle of the present embodiment specifically: the wavelength division multiplexer in the present embodiment is by planar optical waveguide substrate 1, main wave
Guiding path 2, the first complementary wave guiding path 3, the second complementary wave guiding path 4, third complementary wave guiding path 5, the first optical filter 6, second filters
Piece 7, third optical filter 8, is composed.The first optical filter 6, the second optical filter 7 and third filter are inserted on main waveguide paths 2 respectively
Mating plate 8, the first optical filter 6 is λ 1 to wavelength, the optical signal of λ 2, λ 3 are all transmissions, but reflection wavelength is the optical signal of λ 4, from
And λ 4 is exported by the first complementary wave guiding path 3 from the second specific wavelength signal port C.Second optical filter 7 to wavelength be λ 1,
The optical signal of λ 2 transmits, and reflection wavelength is the optical signal of λ 3, so that λ 3 passes through the second complementary wave guiding path 4 from third certain wave long letter
Number port D output.Third optical filter 8 transmits the optical signal that wavelength is λ 1, and reflection wavelength is the optical signal of λ 2, so that λ 2 is from logical
It crosses third complementary wave guiding path 5 to export from the 4th specific wavelength signal port E, λ 1 itself is transmitted from the first specific wavelength signal port
B output.λ 1, λ 2, λ 3, λ 4 are demultiplexed into partial wave by the above process, reverse process is exactly the multiplexing multiplex of four optical signals
Process.
The present invention realizes wavelength-division multiplex using the method for being inserted into super wave optical filter in the waveguide paths of planar optical waveguide
Effect, the advantages of effectively combining both optical filter and planar optical waveguide, describe four wavelength in above-described embodiment
Multiplexing and demultiplexing principle, multiplexing and the demultiplexing of multiple wavelength can also be extended to according to this thinking, and difference is only that increasing
Add the quantity of optical filter and waveguide paths, it is no longer redundant later herein.
The present invention is a kind of optical module comprising: optical signal prosessing device and wavelength division multiplexer as described above, the wave
The multi-wavelength mixed signal port of division multiplexer is connected with optical fiber, and all specific wavelength signal ports are believed with the light
Number processing apparatus is connected.Wherein, the optical signal prosessing device can be optical receiver or optical transmitting set, when optical transmitting set with
When the wavelength division multiplexer is connected, which is sent out optical transmitting set for the multiplexing to optical signal, wavelength division multiplexer
The multipath light signal of the different wave length sent is integrated into signal all the way comprising multi-wavelength, is sent using optical fiber；Work as light
When receiver is connected with the wavelength division multiplexer, which is used for the demultiplexing of optical signal, and wavelength division multiplexer will be from
The received Signal separator comprising multi-wavelength all the way is the optical signal of multichannel different wave length on optical fiber, then multichannel is different
The optical signal of wavelength is sent in optical receiver.
In the description of this specification, reference term " embodiment ", " some embodiments ", " schematically implementation
The description of mode ", " example ", " specific example " or " some examples " etc. means embodiment or example is combined to describe specific
Feature, structure, material or feature are contained at least one embodiment or example of the invention.In the present specification, right
The schematic representation of above-mentioned term is not necessarily referring to identical embodiment or example.Moreover, the specific features of description, knot
Structure, material or feature can be combined in any suitable manner in any one or more embodiments or example.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (8)
1. a kind of wavelength division multiplexer characterized by comprising planar optical waveguide substrate is equipped in the planar optical waveguide substrate
Waveguide paths for being conducted to optical signal, the quantity of the waveguide paths are two sections or more, are respectively that main waveguide is logical
Road and complementary wave guiding path；Two ends of the main waveguide paths are connected to multi-wavelength mixed signal port and specific wavelength signal respectively
Port is equipped with optical filter in the main waveguide paths；The first end of the complementary wave guiding path is connected to another certain wave long letter
Number port, second end and the reflecting surface of the optical filter are connected to each other；Multi-wavelength mixed signal port and specific wavelength
Signal port is all set on the side of the planar optical waveguide substrate.
2. wavelength division multiplexer according to claim 1, which is characterized in that the quantity of the complementary wave guiding path be three with
On, it is respectively the first complementary wave guiding path, the second complementary wave guiding path and third complementary wave guiding path；The first complementary wave guiding path,
The first end of second complementary wave guiding path and third complementary wave guiding path is connected to a specific wavelength signal port respectively.
3. wavelength division multiplexer according to claim 2, which is characterized in that divide equally in the first, second complementary wave guiding path
It She You not optical filter；The reflecting surface phase of the second end of the first complementary wave guiding path and the optical filter in the main waveguide paths
Docking；The second end of the second complementary wave guiding path is opposite with the reflecting surface of optical filter in the first complementary wave guiding path
It connects；The second end of the third complementary wave guiding path and the reflecting surface of the optical filter in the second complementary wave guiding path are connected to each other.
4. wavelength division multiplexer according to claim 2, which is characterized in that be additionally provided with the first secondary filter in the main waveguide paths
Mating plate and the second secondary optical filter；The second end of the first complementary wave guiding path is anti-with the optical filter in the main waveguide paths
The face of penetrating is connected to each other；The second end of the second complementary wave guiding path and the reflecting surface of the first secondary optical filter are connected to each other；The third
The second end of complementary wave guiding path and the reflecting surface of the second secondary optical filter are connected to each other.
5. wavelength division multiplexer according to claim 3 or 4, which is characterized in that between the main waveguide paths and optical filter
It is formed with the first angle, the second angle, first angle are formed between the complementary wave guiding path second end and optical filter
It is equal with the angle of the second angle.
6. wavelength division multiplexer according to claim 5, which is characterized in that the thickness of the optical filter is less than 50 microns.
7. wavelength division multiplexer according to claim 6, which is characterized in that slot is equipped in the planar optical waveguide substrate,
In the optical filter grafting installation and the slot.
8. a kind of optical module characterized by comprising optical signal prosessing device and as claimed in any one of claims 1 to 7
The multi-wavelength mixed signal port of wavelength division multiplexer, the wavelength division multiplexer is connected with optical fiber, all specific wavelength signal ends
Mouth is connected with the optical signal prosessing device.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202050420U (en) * | 2011-05-20 | 2011-11-23 | 深圳新飞通光电子技术有限公司 | Integrated multichannel wavelength division multiplexer |
| CN102725981A (en) * | 2011-12-30 | 2012-10-10 | 华为技术有限公司 | Wave division multiplexing/de-multiplexing device, self-seeding fiber laser and optical network system |
| CN203204196U (en) * | 2013-04-25 | 2013-09-18 | 杭州天野通信设备有限公司 | Coarse wavelength division multiplexer/demultiplexer based on planar optical waveguide |
| CN104714277A (en) * | 2015-04-14 | 2015-06-17 | 青岛海信宽带多媒体技术有限公司 | Wavelength division multiplexer and optical module |
-
2018
- 2018-12-18 CN CN201811551400.6A patent/CN109459823A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202050420U (en) * | 2011-05-20 | 2011-11-23 | 深圳新飞通光电子技术有限公司 | Integrated multichannel wavelength division multiplexer |
| CN102725981A (en) * | 2011-12-30 | 2012-10-10 | 华为技术有限公司 | Wave division multiplexing/de-multiplexing device, self-seeding fiber laser and optical network system |
| CN102725981B (en) * | 2011-12-30 | 2014-08-13 | 华为技术有限公司 | Wave division multiplexing/de-multiplexing device, self-seeding fiber laser and optical network system |
| CN203204196U (en) * | 2013-04-25 | 2013-09-18 | 杭州天野通信设备有限公司 | Coarse wavelength division multiplexer/demultiplexer based on planar optical waveguide |
| CN104714277A (en) * | 2015-04-14 | 2015-06-17 | 青岛海信宽带多媒体技术有限公司 | Wavelength division multiplexer and optical module |
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Application publication date: 20190312 |