CN109802745A - A kind of 8 channel wave band multiplex/demultiplex devices for 200G/400G optical transceiver module - Google Patents
A kind of 8 channel wave band multiplex/demultiplex devices for 200G/400G optical transceiver module Download PDFInfo
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Abstract
A kind of 8 channel wave band multiplex/demultiplex devices for 200G/400G optical transceiver module, including the first filtering unit comprising 3 filter unit I being sequentially arranged, two specified wavelength light waves of each filter unit I transmission reflect remaining wavelength light wave；First reflection subassembly is arranged relative to the first filtering unit, and the light wave for reflecting a upper filter unit I is reflected to the position of next filter unit I；Second wavelength-division component comprising: 4 filter unit II, a wavelength transmission in the light wave for filter unit II will to be incident on, other reflections；The reflector element being oppositely arranged with filter unit II unit II reflecting light and is reflected for accepting filter.For the High Speeding Optical Transmitter-receiver Circuit with 8 road wavelength channels, the transmission path of optical path is more stable, reliable, and manufacture is more convenient simple, and the temperature dependency of device is low, small power consumption, and cost is lower.
Description
Technical field
The present invention relates to optical communication techniques, specifically multiple with a kind of 8 channel wavelength-divisions for 200G/400G optical transceiver module
With/demultiplexing device it is related.
Background technique
In high-speed data communication field, for transmission rate request 40G/100Gbps Networks of Fiber Communications, in order to
Overcome the bottleneck of electric signal transmission rate limit, it is ensured that data can long range high-speed transfer, the solution generallyd use is 4
The optical signal of road different wave length is modulated respectively, then wavelength multiplexing/demultiplex for being transmitted in single mode optical fiber.In this way,
The electrical signal rate of each wavelength channel need to only reach 10/25Gbps, can meet the signal transmission rate of 40/100Gbps.
Currently, with four road wavelength channels optical receiver module optical design scheme be divided into film filtering slice TFF technology and
The PLC AWG chip technology of planar optical waveguide.Since PLC AWG chip is temperature sensitive, wavelength temperature coefficient reaches
0.011nm/ degree, thus PLC AWG chip using when need steady temperature, the heat dissipation for increasing optical device and module design is difficult
Degree, also increases power consumption.And TFF technology, due to its superior temperature characterisitic and minimum insertion loss, wavelength temperature coefficient is only
For ~ 0.002nm/ degree, thus it is widely used.
Based on the module design of film filtering slice technology, structure as shown in Figure 1 is generallyd use, mainly includes substrate
170, collimating coupled lens 110, reflecting mirror 120, TFF type component 130(includes 4 wavelength TFF membranes in the component 130
Piece 1301,1302,1303,1304 is respectively used to the optical wavelength signal specified in 4 kinds of wavelength of transmission and reflects other wavelength signals
(such as 1271nm, 1291nm, 1311nm, 1331nm), focus lens assembly 140(simple lens or lens array) and PD component
150 equal parts.Input light beam from optical fiber enters component 130 by collimation lens 110, and anti-by reflecting mirror more than 120 times
After penetrating, injected in 4 wavelength diaphragms 1301,1302,1303,1304 of component 130 respectively, and then via 4 wavelength diaphragms
1301,1302,1303,1304 light beam for being separated into 4 road different wave lengths, is respectively focused on PD by focus lens assembly 140
On four PD photoelectric detectors 1501,1502,1503,1504 in component 150, by PD photoelectric detector 1501,
1502,1503,1,504 four road optical signals are converted into four road electric signals, and a signal is carried out by connected trans-impedance amplifier
Amplification, realizes the reception of data.Above-mentioned all parts are fixed on the substrate 170 of light receiving element.Above-mentioned optical transceiver module
In a Primary Component be splitting/composing wave device, i.e. component 120 and component 130.
Fig. 2 is another compact design of 4 channel channel-splitting filters in the prior art.Refer in the left side of diamond-like glass block 240
Determine region and be coated with transmission AR film layer 210 and reflection HR film layer 220 respectively, is pasted in the other side designated position of diamond-like glass block 240
There is diaphragm group 230, includes 231 ~ TFF4 of TFF1 234, each TFF transmits a specified wavelength and reflects other wavelength,
For example, 231 transmission 1 wavelength of λ of TFF1, and reflect other 3 wavelength；232 transmission 2 wavelength of λ of TFF2, and so on.When
When optical signal comprising 4 wavelength is inputted from the common port in left side, by transmiting 210,4 TFF membrane piece TFF1 231 of AR film layer
~ TFF4 234 exports corresponding wavelength signals in the corresponding position of each TFF, to realize 4 with after reflection HR film layer 220
The separation or partial wave function of wavelength of optical signal.
The principle and mode of aforementioned wave splitting/composing device can well solve the wave splitting/composing problem of 2 ~ 4 wavelength, but
It is for more multi-wavelength, especially higher rate 200G/400Gbps optical transceiver module, such as the wave splitting/composing of 8 wavelength, such as
Shown in Fig. 3, this mode has the shortcomings that obvious:
It is very sensitive to angle when light inside transmits first is that optical path is too long, the stability of optical path it is difficult to ensure that, and to light beam
Collimation require it is high, it is difficult to ensure that so optical path distance beam collimation.
Second is that the longitudinal size of wave splitting/composing device is too big, it is not able to satisfy the small-sized encapsulated requirement of optical module.
Summary of the invention
The present invention provides a kind of 8 channel wave band multiplex/demultiplex devices for 200G/400G optical transceiver module, with solution
Certainly above-mentioned prior art problem, for the High Speeding Optical Transmitter-receiver Circuit with 8 road wavelength channels, the transmission path of optical path is more steady
Fixed, reliable, manufacture is more convenient simple, and the temperature dependency of device is low, small power consumption, and cost is lower.
In order to achieve the object of the present invention, the following technology of proposed adoption:
A kind of 8 channel wave band multiplex/demultiplex devices for 200G/400G optical transceiver module characterized by comprising
First filtering unit comprising 3 filter unit I being sequentially arranged, two specified wavelength of each filter unit I transmission
Light wave reflects remaining wavelength light wave；
First reflection subassembly is arranged relative to the first filtering unit, and light wave for reflecting a upper filter unit I is to next
The position of a filter unit I is reflected；
Second wavelength-division component comprising:
4 filter unit II, a wavelength transmission in the light wave for filter unit II will to be incident on, other reflections；Wherein,
Preceding 3 filter unit II are respectively arranged at filter unit I transmitted light path；4th filter unit II is set to the first reflection subassembly
In reflecting light optical path after reflecting the 3rd filter unit I reflecting light；
The reflector element being oppositely arranged with filter unit II unit II reflecting light and is reflected it to and is filtered for accepting filter
In the parallel optical path of wave unit II transmitted light wave.
According to above-mentioned design, two wavelength light waves of each filter unit I transmission are all different, and 3 filter unit I are total
Transmit 6 different wave length light waves.
It further, further include the 4th filter unit I being sequentially arranged, the first reflection group in first filtering unit
The light wave that part reflects the 3rd filter unit I is reflected to the 4th filter unit I, and the 4th filter unit I will be in reflecting light
Specified two wavelength light waves are transmitted through the 4th filter unit II.
According to above-mentioned design, 4 filter unit I 8 different wave length light waves of total transmission.
According to above-mentioned design, filter unit I and filter unit II are all made of TFF membrane piece.
According to above-mentioned design, reflector element, including 4 reflector plates respectively correspond each filter unit II and 1 reflection are arranged
Piece
It further, further include a prismatic vitreum, the first reflection subassembly is to be set to prismatic vitreum one side to specify region
HR reflectance coating, be also equipped with AR transmission film in specified region on the side, it is another that the first filtering unit is set to prismatic vitreum
Side.
According to above-mentioned design, the transmitted light path of AR transmission film is incident to the starting filter unit I of the first filtering unit.
According to above-mentioned design, AR transmission film transmits incident all wavelengths light wave.
It further, further include substrate, all components are both secured on substrate.Substrate is unexpansive glass substrate or low bulk
Glass substrate.
It is positive or reverse using to realize partial wave or multiplex function along optical path according to above-mentioned design.
The advantages of above-mentioned technical proposal, is:
1, the wavelength-division multiplex/demultiplexing for more realizing 8 channels added with compact, effective mode by one kind, solves existing skill
The scheme of art may not apply to the defect of 200G/400G optical transceiver module, greatly shorten optical path, avoid the light of part wavelength
Line transmits that light path is too long and order of reflection is excessive, influence of the angular-sensitive to stability of layout, shorter light path and less anti-
Number is penetrated, the high request standard to beam collimation is reduced, is conducive to the realization of collimated light beam and reduces cost；
2, existing multichannel wavelength division multiplexing/demultiplexing device has that longitudinal size is excessive more.Using setting for this programme
The mode of setting can dramatically reduce the longitudinal size of device, effectively meet requirement of the High Speeding Optical Transmitter-receiver Circuit to small-sized encapsulated；
3, the structure of this programme is easy to implement in an implementation, and preparation difficulty is low.
Detailed description of the invention
Fig. 1 shows a solution of 4 channel wave band multiplex/demultiplex device of the prior art.
Fig. 2 shows the compact solutions of 4 channel wave band multiplex/demultiplex device of the prior art.
Fig. 3 shows a solution of 8 channel wave band multiplex/demultiplex device of the prior art.
Fig. 4 shows a kind of embodiment of 8 channel wave band multiplex/demultiplex devices of the invention.
Fig. 5 shows another embodiment of 8 channel wave band multiplex/demultiplex devices of the invention.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing to the present invention do into
The detailed description of one step.
A kind of embodiment of the invention is as shown in Figure 4.
Region plating AR transmission film layer 310 and HR are specified comprising diamond-like glass block 340, and in 340 side of diamond-like glass block
Reflective coating 320 mounts 4 TFF membrane piece groups 330 in 340 other side of diamond-like glass block, includes TFF1 331、TFF2 332、
TFF3 333、TFF4 334。
AR transmits film layer 310 as public combining light entrance, and HR reflective coating 320 is used as the first reflection subassembly, TFF
Diaphragm group 330 constitutes the first filtering unit, and each TFF therein is as filter unit I.
AR transmission film transmits 8 incident wavelength light waves, and the starting filter of the first filtering unit is incident to after transmiting
Wave unit I, TFF1 331。
First filtering unit comprising 4 the filter unit I, TFF being sequentially arranged1 331、TFF2 332、TFF3 333、
TFF4334, two specified wavelength light waves of each filter unit I transmission reflect remaining wavelength light wave.
HR reflective coating 320 is used for TFF1The light waves of 331 reflections are to TFF2332 position reflection, by TFF2 332
The light wave of reflection is to TFF3333 position reflection, TFF3The light waves of 333 reflections are to TFF4334 position reflection.
Corresponding film filtering slice TFF is placed respectively in each 330 right side designated position of TFF membrane piece5 351、TFF6 352、
TFF7 353、TFF8354, and and it is correspondingly arranged reflector plate1361, reflector plate2362, reflector plate3363, reflector plate4
364, the second partial wave component is constituted, each TFF therein is as filter unit II, and each reflector plate is as reflector element.
Wherein, TFF5351 and reflector plate1361, TFF6 352 and reflector plate2362, TFF7353 and reflector plate3 363,
TFF8354 and reflector plate4364, one is respectively constituted to the module for carrying out partial wave containing two wavelength combining light.
Said elements be all fixed on that one unexpansive or low-expansion glass substrate on, substrate is not drawn into figure, constitutes one
A 8 channel wave band multiplex/demultiplex device.Forward direction uses, and is wavelength-division multiplex；It is reverse to use, for demultiplexing.
Wherein, TFF1Two specified wavelength Xs 1 of 331 transmissions, λ 2, reflect its commplementary wave length；TFF2332 transmit specified two
A wavelength X 3, λ 4, reflect its commplementary wave length；TFF3Two specified wavelength Xs 5 of 333 transmissions, λ 6, reflect its commplementary wave length；TFF4 334
Two specified wavelength Xs 7 of transmission, λ 8, reflect its commplementary wave length.
Wherein, TFF5The specified wavelength X 2 of 351 transmissions, reflects 1 wavelength of λ；TFF6The specified wavelength X 4 of 352 transmissions, reflection
3 wavelength of λ；TFF7The specified wavelength X 6 of 353 transmissions, reflects 5 wavelength of λ；TFF8The specified wavelength X 8 of 354 transmissions, reflects 7 wave of λ
It is long.
It is positive in use, be illustrated in figure 4 340 left side of diamond-like glass block from common port, comprising 8 wavelength
Optical signal enters by AR transmission film layer 310, travels to TFF1Two light wave λ 1, λ 2 are transmitted through TFF when 3311331,
63 ~ λ of light wave λ 8 of remaininging are reflected；Two transmitted light wave λ 1, λ 2 are by TFF5351 receive, and wherein 2 light wave of λ penetrates TFF5351 is defeated
Out, 1 light wave of λ is reflected onto reflector plate1It is exported after 361.
By TFF1 After 3 ~ λ of λ, 8 light wave propagation to HR reflective coating 320 of 331 reflections, then it is reflected to TFF2332,
In specify two light wave λ 3, λ 4 be transmitted through TFF2332, remaining 45 ~ λ of light wave λ 8 is reflected；Two wavelength Xs 3, λ 4 are saturating
It penetrates light to be received by TFF6 352, wherein 4 wavelength light of λ penetrates TFF6352 outputs, 3 light wave of λ are reflected onto reflector plate2It is defeated after 362
Out.
So circulation, until 8 light wave of λ penetrates TFF8354 outputs, 7 light wave of λ are reflected onto reflector plate4It is exported after 364, from
And complete the partial wave of 8 channel optical signals.
It is reverse to use using same method according to light reversibility pricinple, it is inputted in the other side of embodiment,
Respectively to TFF5 351、TFF6 352、TFF7 353、TFF8354, and and it is correspondingly arranged reflector plate1361, reflector plate2
362, reflector plate3363, reflector plate4364 respectively input the light of 1 wavelength, amount to 8 wavelength signals, specifically, such as the present embodiment
In, right side inputs the optical signal of corresponding 8 wavelength in Fig. 4, can complete 8 channel multiplex functions, realizes demultiplexing for 8 channels
With.
As the another embodiment of the present embodiment, TFF can be saved4334, i.e. the first filtering unit only includes 3
The filter unit I being sequentially arranged.TFF is directly incident on by the light wave containing λ 7 and λ 8 that HR reflective coating 320 finally reflects8
354, λ 8 light waves penetrate TFF8354 outputs, 7 light wave of λ are reflected onto reflector plate4It is exported after 364, main property can also not influenced
The partial wave of 8 channel optical signals is completed in the case where energy.
Another embodiment of the invention is as shown in Figure 5.
Region plating AR transmission film layer 410 and HR are specified comprising diamond-like glass block 440, and in 440 side of diamond-like glass block
Reflective coating 420 mounts 4 TFF membrane piece groups in 440 other side of diamond-like glass block, includes TFF1 431、TFF2 432、TFF3
433、TFF4 434。
Corresponding film filtering slice TFF is placed respectively in each 430 right side designated position of TFF membrane piece5 451、TFF6 452、
TFF7 453、TFF8454, and and it is correspondingly arranged reflector plate1461, reflector plate2462, reflector plate3463, reflector plate4
464。
Said elements be all fixed on that one unexpansive or low-expansion glass substrate on, substrate is not drawn into figure, constitutes one
A 8 channel wave band multiplex/demultiplex device.Forward direction uses, and is wavelength-division multiplex；It is reverse to use, for demultiplexing.
Wherein, TFF1Two specified wavelength Xs 1 of 431 transmissions, λ 2, reflect its commplementary wave length；TFF2432 transmit specified two
A wavelength X 3, λ 4, reflect its commplementary wave length；TFF3Two specified wavelength Xs 5 of 433 transmissions, λ 6, reflect its commplementary wave length；TFF4 434
Two specified wavelength Xs 7 of transmission, λ 8, reflect its commplementary wave length.
Unlike embodiment as shown in Figure 4:
TFF5The specified wavelength X 1 of 451 transmissions, reflects 2 wavelength of λ；
TFF6The specified wavelength X 3 of 452 transmissions, reflects 4 wavelength of λ；
TFF7The specified wavelength X 5 of 453 transmissions, reflects 6 wavelength of λ；
TFF8The specified wavelength X 7 of 454 transmissions, reflects 8 wavelength of λ.
Forward direction is in use, according to identical partial wave principle, when 8 wavelength are combined light, as shown in figure 5, from diamond-like glass block 440
It left side, can also be in TFF after AR transmission film layer 410 enters5 451、TFF6 452、TFF7 453、TFF8454, and and it is right
Reflector plate should be set1461, reflector plate2462, reflector plate3463, reflector plate4464 other side obtains 1 wavelength respectively
Optical signal realizes the partial wave of 8 channel optical signals.
It is reverse to use using same method according to light reversibility pricinple, it is inputted in the other side of embodiment,
Respectively to TFF5 451、TFF6 452、TFF7 453、TFF8454, and and it is correspondingly arranged reflector plate1461, reflector plate2
462, reflector plate3463, reflector plate4464 respectively input the light of 1 wavelength, amount to 8 wavelength signals, specifically, such as the present embodiment
In, right side inputs the optical signal of corresponding 8 wavelength in Fig. 5, can complete 8 channel multiplex functions, realizes demultiplexing for 8 channels
With.
As the another embodiment of the present embodiment, TFF4434 can be omitted, without influencing main performance, here
It repeats no more.
The above description is only a preferred embodiment of the present invention, is not intended to restrict the invention, it is clear that those skilled in the art
Various changes and modifications can be made to the invention by member without departing from the spirit and scope of the present invention.If in this way, of the invention
Within the scope of the claims of the present invention and its equivalent technology, then the present invention is also intended to encompass these to these modifications and variations
Including modification and variation.
Claims (10)
1. a kind of 8 channel wave band multiplex/demultiplex devices for 200G/400G optical transceiver module characterized by comprising
First filtering unit comprising 3 filter unit I being sequentially arranged, two specified wavelength of each filter unit I transmission
Light wave reflects remaining wavelength light wave；
First reflection subassembly is arranged relative to the first filtering unit, and light wave for reflecting a upper filter unit I is to next
The position of a filter unit I is reflected；
Second wavelength-division component comprising:
4 filter unit II, a wavelength transmission in the light wave for filter unit II will to be incident on, other reflections；Wherein,
Preceding 3 filter unit II are respectively arranged at filter unit I transmitted light path；4th filter unit II is set to the first reflection subassembly
In reflecting light optical path after reflecting the 3rd filter unit I reflecting light；
The reflector element being oppositely arranged with filter unit II unit II reflecting light and is reflected for accepting filter.
2. the 8 channel wave band multiplex/demultiplex devices according to claim 1 for 200G/400G optical transceiver module,
It is characterized in that: further including the 4th filter unit I being sequentially arranged in first filtering unit, the first reflection subassembly is by
The light wave of 3 filter unit I reflection is reflected to the 4th filter unit I, and the 4th filter unit I will specify two in reflecting light
A wavelength light wave is transmitted through the 4th filter unit II.
3. the 8 channel wave band multiplex/demultiplex devices according to claim 1 for 200G/400G optical transceiver module,
Be characterized in that: filter unit I and filter unit II are all made of TFF membrane piece.
4. the 8 channel wave band multiplex/demultiplex devices according to claim 1 for 200G/400G optical transceiver module,
Be characterized in that: reflector element unit II reflecting light and reflects it to and filter unit II transmitted light wave for accepting filter
In parallel optical path.
5. the 8 channel wave band multiplex/demultiplex devices according to claim 1 for 200G/400G optical transceiver module,
Be characterized in that: reflector element, including 4 reflector plates respectively correspond each filter unit II and 1 reflector plate are arranged.
6. described according to claim 1 ~ any one of 5 for 200G/400G optical transceiver module 8 channel wavelength-division multiplex/
Demultiplex device, it is characterised in that: further include a prismatic vitreum, the first reflection subassembly is to be set to prismatic vitreum side
The HR reflectance coating in region is specified in face, is also equipped with AR transmission film in specified region on the side, the first filtering unit is set to prismatic
Vitreum another side.
7. the 8 channel wave band multiplex/demultiplex devices according to claim 6 for 200G/400G optical transceiver module,
Be characterized in that: AR transmission film transmits incident all wavelengths light wave, and the starting of the first filtering unit is incident to after transmiting
Filter unit I.
8. the 8 channel wave band multiplex/demultiplex devices according to claim 1 for 200G/400G optical transceiver module,
It is characterized in that: further including substrate, all components are both secured on substrate.
9. the 8 channel wave band multiplex/demultiplex devices according to claim 8 for 200G/400G optical transceiver module,
Be characterized in that: substrate is unexpansive glass substrate or low-expansion glass substrate.
10. the 8 channel wave band multiplex/demultiplex devices according to claim 1 for 200G/400G optical transceiver module,
It is characterized by: positive or reverse using to realize partial wave or multiplex function along optical path.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111427121A (en) * | 2020-04-27 | 2020-07-17 | 武汉光鱼科技有限公司 | Eight-channel wavelength division multiplexing and wavelength division demultiplexing optical device |
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