CN104297853B - Modular wavelength and space All-optical routing device - Google Patents
Modular wavelength and space All-optical routing device Download PDFInfo
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- CN104297853B CN104297853B CN201410551221.8A CN201410551221A CN104297853B CN 104297853 B CN104297853 B CN 104297853B CN 201410551221 A CN201410551221 A CN 201410551221A CN 104297853 B CN104297853 B CN 104297853B
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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
- G02B6/29379—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 characterised by the function or use of the complete device
- G02B6/2938—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 characterised by the function or use of the complete device for multiplexing or demultiplexing, i.e. combining or separating wavelengths, e.g. 1xN, NxM
Abstract
The invention discloses a kind of modular wavelength and space All-optical routing device.The input port of first spatial light router is connected with N root single mode input fibers, then the output port of the first spatial light router is connected with each wavelength convert and routing module, after wavelength convert and routing module, it is connected with the input port of second space optical router, second space optical router output port is connected with N root single-mode output optical fiber, completes optical signal to the route of each self-corresponding single-mode output optical fiber；First spatial light router and the work of second space optical router mirror image.The present invention is used in division multiplex fibre-optic communication wave system, each optical signal is routed to any output port from input port, completes wavelength convert；And the cascade to wavelength convert and routing module and linearly increasing, the more complete routing function of realization, increase routed channels number can be passed through.Whole routing infrastructure can be realized integrated by Planar Lightwave Circuit Technology.
Description
Technical field
The present invention relates to fiber optic communication All-optical routing technology, more particularly, to the full light path of a kind of modular wavelength and space
By device.
Background technology
After optical fiber is born and is applied successfully, Fibre Optical Communication Technology fast development, the invention of WDM communication modes causes light
Fiber communication bandwidth greatly improves.Rapidly increasing for fiber optic communication data directly proposes to each processing node in optical communication network
Requirements at the higher level, all-optical communication network turn into the developing direction of following optical communication network.
Optical signal bag forwarding using wavelength as foundation is the important way that signal is route in WDM optical-fiber networks.Current
Mainstream technology more using the processing mode of optical-electrical-optical wavelength convert and route, it the advantages of be technically more ripe, can be achieved
Regularly, regeneration, shaping feature, but this scheme are due to introducing light-to-current inversion and Clock Extraction, it is necessary to many high cost, Gao Gong
The high speed optoelectronic instrument of consumption, opaque to signal bit rate and signal format, there is " electronic bottleneck " in conversion speed,
The demand for development of all-optical network " high data throughput, high RST process bandwidth, low energy consumption " is not met.It is also a kind of to be based on micro- electricity
The routing infrastructure of sub- electromechanical system switch (MEMS-Switches), there is the commercial device for supporting that 32 input/output end ports exchange
Part report " Glimmerglass Intelligent Optical System, " tables of data can be
Www.glimmerglass.com is obtained.But the greatest drawback of this structure is channel switch time length, up to millisecond magnitude, only
Suitable for Continued communication time span between a pair of nodes in the situation of second-time.
All-optical routing needs not move through electrical domain processing, directly by information from a light wavelength conversion to another optical wavelength,
By the forwarding of optical passive component, reach route purpose.Mainly there are Optical Demultiplexing, wavelength convert, light in wdm system optical router
The modules such as multiplexing, optical routing." electronic bottleneck " problem is not present in All-optical routing, and bandwidth is huge, transparent to signal rate and form,
And single chip integrated All-optical routing chip energy consumption will more route than optical-electrical-optical and substantially reduce.
The All-optical routing device proposed at present is mainly had photoswitch, passive array waveguide grating device and put based on semiconductor light
Big two kinds of device (SOA) wavelength convert.“Multi-path Routing in an Monolithically Integrated 4×
4Broadcast and Select WDM Cross-connection ", ECOC, September18-22,2011, InP
PHOTONICS (Mo.2.LeSaleve) reports a kind of all-optical cross interconnection based on SOA photoswitches, and the structure realizes 4 ×
4 optical signal cross-connects.This All-optical routing mode is mainly made up of broadcast selecting module and the part of wavelength selecting module 2.
Broadcast in selecting module, the optical signal of 4 input ports is separately input to each by cascading multi-mode interference coupler (MMI)
The input port of array waveguide grating (AWG).Before AWG is entered, per there is SOA switches on the way, by adjusting SOA injections
Electric current, to control the break-make per all the way.After the forwarding that 4 circulate 4 × 4 arrayed-waveguide grating routers (AWGR), letter
Number enter wavelength selecting module.Designed according to routing table, SOA electric currents on each output ports of adjusting wavelength selecting module AWG, can be with
The wavelength of the latter linked cascade MMI Shang Ge roads signal of decision, and then can reach every in the whole router chip output end of control
Wavelength all the way.But the method can only carry out the forwarding of different input port optical signals, and original signal can not be transferred to separately
On one wavelength, and with input signal channel number (N) increase, it is necessary to accordingly increase to N number of circulation N × NAWGR and
2N SOA switch.Meanwhile it will pass through cascade MMI per input signal all the way and extend to N number of output port, whole route system
Single-side pin number is N2It is individual, device size can be greatly increased.This chip structure is extremely unfavorable for the extension of channel number, increases
Add signal all the way, the design of whole chip will change, and device design difficulty greatly increases.“An 8x8InP
Monolithic Tunable Optical Router (MOTOR) Packet Forwarding Chip ", Journal of
Lightwave Technology, Vol.28, Issue 4, pp.641-650 disclose a kind of light path based on SOA wavelength converts
By mode.Intermodulation effect of this mode by the way that original signal to be passed through to SOA is transferred to the new ripple that tunable laser is sent
In length, then with AWGR it is forwarded to respective channels.But this structure transfer capability is limited, proposed in optical-fiber network aspect more
Signal exchange between optical fiber.
Above-mentioned All-optical routing structure can not completely realize the wavelength convert of All-optical routing and transparent turn of port in optical-fiber network
The functional requirement of hair, and the autgmentability of system is not good enough.
The content of the invention
In view of the shortcomings of the prior art, it is an object of the invention to propose a kind of modular wavelength and space All-optical routing
Device.
The technical solution adopted by the present invention is：
The present invention includes the first spatial light router, wavelength convert and routing module and second space optical router；First
The input port of spatial light router is connected with N root single mode input fibers, each optical signal that will be multiplexed in single mode input fiber
It is routed on each self-corresponding output port of the first spatial light router；Then the output port of the first spatial light router is through each
Individual wavelength convert and routing module are connected with the input port of second space optical router, and the optical signal of every group of different wave length is passed through
Wavelength convert processing is crossed to be sent in each self-corresponding input port of second space optical router；Second space optical router will be by
It is each self-corresponding that the optical signal of wavelength convert and every group of different wave length of routing module output is sent to second space optical router
Output port；Second space optical router output port is connected with N root single-mode output optical fiber, and output light is signally attached to each
Corresponding single-mode output optical fiber；First spatial light router and the work of second space optical router mirror image so that by second space
Each wavelength of optical signal and each self-corresponding input optical fibre of the first spatial light router in every road optical fiber of optical router output
In each wavelength of optical signal it is consistent.
Optical demultiplexer that described wavelength convert and routing module include being sequentially connected, N number of first wave length converter, the
Three spatial light routers, N number of second wave length converter and optical multiplexer；Light letter of the first spatial light router per road output port
Number first passing through optical demultiplexer is decomposed into Single wavelength signal, and each Single wavelength signal is transferred to through respective first wave length converter
In 3rd spatial light router, the 3rd spatial light router is changed through second wave length again after carrying out space route to Single wavelength signal
Optical multiplexer is sent to after device wavelength convert, each Single wavelength signal is merged into optical signal all the way and is output to second by optical multiplexer
Spatial light router.
The light that described first wave length converter or second wave length converter include filtering out optical signal before conversion filters
Device structure.
Do not include optical filter structure, the 3rd space optical path in described first wave length converter and second wave length converter
There are different channel spacings from the first spatial light router, second space optical router by device so that single mode input fiber and
The transmission spectrum of the wavelength of the optical signal transmitted in single-mode output optical fiber and the 3rd spatial light router mismatches.
Described optical demultiplexer is 1 × N optical demultiplexers, using array waveguide grating or diffraction etched diffraction grating.
Described optical multiplexer is the optical multiplexer of N × 1, using array waveguide grating, diffraction etched diffraction grating or multiple-mode interfence
Coupler.
The first described spatial light router or second space optical router are circular array waveguide optical grating or circulation diffraction
Etched diffraction grating.
The 3rd described spatial light router is circular array waveguide optical grating or circulation diffraction etched diffraction grating.
Described first wave length converter or second wave length converter are the nonlinear effect using semiconductor optical amplifier
The Wavelength transformational structure optical signal of one wavelength being carried on the DC laser of another different wave length.
Described the first spatial light router, second space optical router and wavelength convert and routing module are all or part of
Integrate on the same chip.
The beneficial effects of the invention are as follows：
Based on wavelength convert and routing module, there is fabulous expansion, reduce the design difficulty of All-optical routing, have simultaneously
There are space route and the effect of wavelength convert, it is possible to achieve input has N altogether2Exchange between individual channel.
The present invention can completely realize signal wavelength conversion, the function of forwarding in All-optical routing, and complete to the signal format of light
All-transparent.
The present invention enjoys bigger bandwidth compared to traditional optical-electrical-optical router and existing optical routing structure, can complete higher
The light data processing of bit rate, exchange.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention.
Fig. 2 is the structural representation of wavelength convert and routing module of the present invention.
Fig. 3 is the first spatial light router routed path schematic diagram of the invention.
Fig. 4 is second space optical router routed path schematic diagram of the present invention.
Fig. 5 is the 3rd spatial light router routing table schematic diagram of the invention.
Fig. 6 is All-optical routing working method example of the present invention.
Fig. 7 is the optical demultiplexer schematic diagram of embodiment.
Fig. 8 is the optical multiplexer schematic diagram of embodiment.
Fig. 9 is the first wavelength shifter structure chart of embodiment.
Figure 10 is second of wavelength shifter structure chart of embodiment.
Figure 11 is the wavelength shifter principle of signal conversion and design sketch of embodiment.
Figure 12 is the spatial light router schematic diagram of embodiment.
Figure 13 is the first input port transmitted spectrum schematic diagram of the 3rd spatial light router of embodiment.
In figure：A, wavelength convert and routing module, the 3, first spatial light router, 4, optical demultiplexer, 5, first wave length
Converter, the 6, the 3rd spatial light router, 7, second wave length converter, 8, optical multiplexer, 9, second space optical router, L1,
L2 ... LN is the sequence number of single mode input fiber, L1 ', L2 ' ... LN ' is the sequence number of single-mode output optical fiber, 10, tunable laser
Device, 11, nonlinear optical amplifier, 12, delay waveguide, 13, linear optical amplifier, 14, phase converter.
Embodiment
The present invention is further illustrated with reference to the accompanying drawings and examples.
As shown in figure 1, whole router is mainly by the first spatial light router 3, wavelength convert and routing module A and second
Spatial light router 9 is formed；The input port of first spatial light router 3 is connected with N root single mode input fibers, and single mode is inputted
The each optical signal being multiplexed in optical fiber is routed on 3 each self-corresponding output port of the first spatial light router；First spatial light
The output port of router 3 is connected through each wavelength convert and routing module A with the input port of second space optical router 9,
The optical signal of every group of different wave length is sent to each self-corresponding input of second space optical router 9 by wavelength convert processing
In mouthful；Optical signal by wavelength convert and every group of different wave length of routing module A outputs is sent to by second space optical router 9
Each self-corresponding output port of second space optical router 9；The output port of second space optical router 9 and N root single-mode output light
Fibre connection, each self-corresponding single-mode output optical fiber is signally attached to by output light；First spatial light router 3 and second space light
The mirror image of router 9 works so that each wavelength of optical signal and first in the every road optical fiber exported by second space optical router 9
Each wavelength of optical signal in each self-corresponding input optical fibre of spatial light router 3 is consistent.
As shown in Fig. 2 each wavelength convert and routing module A design all same in system, including the photodissociation being sequentially connected
Multiplexer 4, N number of first wave length converter 5, the 3rd spatial light router 6, N number of second wave length converter 7 and optical multiplexer 8, bear
Duty carries out the wavelength convert and route of one group of N number of wavelength channels of spatial light 3 one output ports of router.
As shown in Fig. 2 the first spatial light router 3 first passes through optical demultiplexer 4 per the optical signal of road output port and decomposed
For Single wavelength signal, each Single wavelength signal is transferred in the 3rd spatial light router 6 through respective first wave length converter 5,
3rd spatial light router 6 transmits after the wavelength convert of second wave length converter 7 again after carrying out space route to Single wavelength signal
To optical multiplexer 8, each Single wavelength signal is merged into optical signal all the way and is output to second space optical router 9 by optical multiplexer 8.
Preferably, first wave length converter 5 or second wave length converter 7 include optical filter structure, and first wave length turns
The optical filter structure of parallel operation 5 or second wave length converter 7 filters out optical signal before conversion.
Preferably, in the case of not including optical filter in first wave length converter 5 and second wave length converter 7, the
The output port of one wavelength shifter 5 and second wave length converter 7 can have optical signal after former optical signal and conversion simultaneously.If
3rd spatial light router 6 designs identical with the first spatial light router 3, second space optical router 9, then former optical signal can road
By a certain output port to 3, interference routes to optical signal after the conversion that the port exports.After avoiding former optical signal to conversion
Optical signal crosstalk in each port, the 3rd spatial light router 6 and first in optical signal crosstalk, i.e. the 3rd spatial light router 6
Spatial light router 3, second space optical router 9 have different channel spacings so that single mode input fiber and single-mode output
The transmission spectrum (i.e. transmitted spectrum) of the wavelength of the optical signal transmitted in optical fiber and the 3rd spatial light router 6 mismatches.
When it is implemented, so that the 3rd spatial light router 6 and the first spatial light router 3, second space optical router 9
Interchannel be separated with certain deviation, prevent former optical signal from by the 3rd spatial light router 6.Former optical signal enters first wave length
Converter 5, make signal loading to one group of new wavelength, and the channel matched of the 3rd spatial light router 6, i.e., on wavelength convert and road
By using one group of different wave length to complete channel switch in modules A.In wavelength convert modules A, pass through first time wavelength shifter
5, the optical signal after optical demultiplexer 4 demultiplexes is transferred on the light at one group of different wave length interval, pass through the 3rd spatial light
Router 6, then by second of wavelength shifter 7, the optical signal after the space of the 3rd spatial light router 6 is route is changed again
To the wavelength for meeting the channel spacing of second space optical router 9, continue to transmit.
Optical demultiplexer 4 is 1 × N optical demultiplexers, is according to designed by the wavelength interval of N number of channel in input optical fibre
Single ended input, the optical passive component of N number of port Single wavelength output, preferably using array waveguide grating AWG or diffraction etching light
Grid EDG.
Optical multiplexer 8 is the optical multiplexer of N × 1, for N number of input single-wavelength light signal merge into the light of single port output without
Source device, preferably use array waveguide grating AWG, diffraction etched diffraction grating EDG or multi-mode interference coupler MMI.
Preferable first spatial light router 3, the spatial light router 6 of second space optical router 9 and the 3rd can it is identical or
Person differs, and can use circular array waveguide optical grating AWGR or circulation diffraction etched diffraction grating EDGR.
Described first wave length converter 5 or the structure of second wave length converter 7 can be identical or differed, and are specially profit
The optical signal of one wavelength is carried in the DC laser of another different wave length with semiconductor optical amplifier SOA nonlinear effect
On Wavelength transformational structure.
Preferably, first wave length converter 5 or second wave length converter 7 can use structure as shown in Figure 9, including adjustable
Humorous laser 10, nonlinear optical amplifier 11 and delay waveguide 12, detection light and the flashlight warp that tunable laser 10 is sent
The input of waveguide connected nonlinearity image intensifer 11, the output end of nonlinear optical amplifier 11 connect fiber waveguide and delay ripple respectively
Output signal after leading 12.
Preferably, first wave length converter 5 or second wave length converter 7 can use structure as shown in Figure 10, including can
Tuned laser 10, nonlinear optical amplifier 11, delay waveguide 12, linear optical amplifier 13 and phase converter 14, flashlight is divided into
Two-way, connect the respective input of linear optical amplifier 13, tunable laser 10 after fiber waveguide and delay waveguide 12 respectively
Send two-way detection light, the output end of two output ends of linear optical amplifier 13 and each self-corresponding tunable laser 10 is through coupling
Clutch couples, by the signal of two output ends of linear optical amplifier 13 and the two-way of tunable laser 10 detection light difference coupling
Close, the respective input of nonlinear optical amplifier 11 is connected to after forming two ways of optical signals, two-way nonlinear optical amplifier 11
Output after the one of output end of nonlinear optical amplifier 11 connection phase converter 14 with the nonlinear optical amplifier 11 of another way
Final optical signal is exported after the coupling of end.
Above-mentioned tunable laser is tunable semiconductor laser, and nonlinear optical amplifier 11 uses nonlinear optical
Amplifier, linear optical amplifier 13 use linear semiconductor image intensifer.
N of the invention is positive integer, when needed, need to only increase input and output optical fibre number, and corresponding increase by three
The port number of spatial light router 3,6,9 and wavelength convert and routing module A number, wherein wavelength convert and routing module A
Structure and design all same.
The operation principle of the present invention is as follows：
In the present invention, each signal wavelength subscript occurred in figure is the same, and it is the same to represent wavelength.Transmitted in input optical fibre
One group of wavelength of optical signal matrix such as formula 1.Wherein subscript first digit i represents optical fiber sequence number, and second digit j represents channel sequence
Number, such as λ12Represent second channel wavelength of first input optical fibre.
Wherein, the first spatial light router 3 designs identical with second space optical router 9, mirror image use, be have it is identical
Free Spectral Range Δ λFSR, same channel interval delta v AWGR or EDGR passive devices, with every optical fiber input signal wavelength
Scope and wavelength interval match.The routed path of first spatial light router 3 such as Fig. 3.After route, output port wavelength square
Battle array such as formula 2, each of which row represent the wavelength of the corresponding output port of spatial light router one：
The routed path such as Fig. 4 of second space optical router 9, after wavelength convert module, the wavelength of each port input
The matrix such as output port wavelength matrix such as formula 3 of formula 2：
In wavelength convert and routing module A, the first wave length converter 5 based on tunable laser, SOA and MZI and
Two wavelength shifters 7 can realize the very broadband wavelength convert of covering, input optical signal can be carried in tunable laser
In any wavelength light that device can export.To avoid crosstalk between optical signal and original signal after wavelength convert, the 3rd spatial light is designed
Router 6, make it that there is different operation wavelengths, former optical signal from the first spatial light router 3, second space optical router 9
By just having very big decay after the 3rd spatial light router 6.By first time wavelength convert, former optical signal is set to be carried in and 3
One group of new wavelength X of matching1,λ2,λ3,…λNOn.The routing table of 3rd spatial light router 6 such as Fig. 5.By the 3rd spatial light
The forwarding of router 6, optical signal enters second of wavelength convert in corresponding ports after conversion, and the wavelength after now changing should meet
The needs of second space optical router 9, similarly, the optical signal before conversion is by also there is very big damage after second space optical router 9
Consumption, avoids the crosstalk between channel.
Below by taking the exchange of several representative channels as an example, specific routing procedure is introduced.
(1) in different optical fiber, same logical channel exchanges
Same logical channel refers in different optical fiber, after the forwarding of the first spatial light router 3, into the first spatial light
Matrix is all one group of same logical channel per a line in the wavelength of the same output port of router 3, i.e. formula 2.With λ11And λ22
Exemplified by exchange, such as Fig. 6, first in the first spatial light router 3, by λ11And λ22Respectively is forwarded to from input optical fibre L1, L2
One output port.Demultiplexed by optical demultiplexer 4, the two is respectively enterd in wavelength convert and routing module A first logical
Road and second channel.λ11Through first time wavelength convert to λ2, forwarded by the 3rd spatial light router 6, into second of wavelength
Second channel, then wavelength convert are changed to λ22.Similarly, λ22Through first time wavelength convert to λ2, by the 3rd spatial light router 6
Forwarding, λ2Into second of wavelength convert first passage, then wavelength convert is to λ11。λ11With λ22After the multiplexing of multiplexer 8, enter
Second space optical router 9, output optical fibre L1 ', L2 ' are forwarded to respectively.Then complete λ in input optical fibre L111With input optical fibre L2
Middle λ22Port and the complete exchange of wavelength.
Because the output port of each the first spatial light router 3 includes the corresponding phase from each input optical fibre
Same logic channel, therefore, any channel in input optical fibre can be with corresponding same logical channel in an other optical fiber
The complete exchange of completing port and wavelength.
(2) in different optical fiber, Different Logic channel switch
With the λ in input optical fibre L112With the λ in input optical fibre L222Exemplified by exchange, such as Fig. 6.First in first time space
In optical routing module 3, λ12It is forwarded to the second output port, λ22It is forwarded to the first output port.The two passes through demultiplexing respectively,
In wavelength convert and routing module, λ22Into second channel, through first time wavelength convert to λ2, by the 3rd space optical path by
Device 6 forwards, λ2Into second of wavelength convert first passage, then wavelength convert is to λ11, after the multiplexing of multiplexer 8, into second
Spatial light router 9.Similarly, λ12Into wavelength convert modules A, through first time wavelength convert, by its contained signal loading in λ4,
The third channel of second of wavelength convert is routed to, then by signal loading in λ23。λ11And λ23By second space optical router 9
Forwarding respectively enters output optical fibre L1 ', L2 '.
Unlike the channel switch in the case of the first, in this case, λ in input optical fibre L112Be converted to output
λ in optical fiber L2 '23, λ in input optical fibre L222Be converted to λ in output optical fibre L1 '11, wavelength is inconsistent before and after route.
The present invention realizes except that can build system by optical fiber connection with various functions module, can also pass through active nothing
Source integrated technology is realized on chip, including the multiple extension based on III-V wafers or quantum well mixing technique monolithic collection
Into, III-V hybrid integrated is accurately bonded with SOI.
All structures by the invention, such as the first spatial light router 3, second space optical router 9 and wavelength convert
And routing module A can be integrated completely or partially on the same chip.Wherein, part is integrated specifically can be according to device function subregion
Domain integrates.
The specific implementation process of the present invention：
Optical demultiplexer 4 has one group of wavelength different using a kind of AWG structures as shown in Figure 7 in demultiplexer input port
Optical signal, by AWG devices, be divided into N roads, from demultiplexer output port export.
Optical multiplexer 8 is using a kind of AWG structures as shown in Figure 8, and N number of port inputs difference respectively at multiplexer inputs mouth
The optical signal of wavelength, by AWG, it is combined into all the way, is exported from multiplexer output terminal mouth.
Two groups of selections of wavelength shifter 5,7 can use structure as shown in Figure 9, Figure 10.Tunable laser 10 can pass through
The mode such as electric current injection or thermal tuning, obtains DC laser.As shown in figure 9, the detection light that is sent of tunable laser 10 and
Flashlight enters nonlinear optical amplifier 11 together, and the two is modulated by Nonlinear and crossing, and detection light will load signal.Due to
The limitation of semiconductor devices carrier lifetime, in high speed crossmodulation, detect the signal intensity of light, phase changes with flashlight
And the change occurred has conditions of streaking.For example quantum well structure semiconductor chip, carrier lifetime are about a few nanosecond ns, it is clear that
10GHz and above crossmodulation response demand can not be met.By the waveguide 12 that is delayed, make detection light through above and below different length two
Arm, output port is reached with Δ t time difference.As shown in Figure 11 top half A, there is a phase in now two-way detection light
DifferenceBy optimizing phase differenceFormer detection light " hangover " effect can be eliminated after the detection interference of light of two beams, by phase information
Strength information is converted into, signal quality is improved, such as Figure 11 the latter half B.Structure shown in Figure 10 is then first by incoming signal light
It is divided into two-way, believes two-way by linear amplifier 13 by the two the retention time difference Δ t of waveguide 12 that is delayed all the way below
Number luminous power balance.The 10 detection light sent are also divided into 2 tunnels, are coupled as afterwards entering all the way with upper arm, underarm flashlight respectively
Nonlinear amplifier 11.Equally, the crossmodulation of detection light and flashlight occurs in 11, then passes through the optimizing regulation of phase converter 14
The phase difference of upper and lower two-arm detection lightSuch as Figure 11, preferably detection optical signal output is obtained.
The signal of the two-arm up and down delay Δ t of the offer of delay waveguide 14 determines according to signal rate.If input signal is
10Gbit/s NRZs, then Δ t is about 0.05ns.If the phase difference of upper and lower two-arm detection optical signal is 180 °, can be with complete
It is absolutely dry to relate to delustring, reach maximum extinction ratio.
Three spatial light routers 3,6,9 are as shown in figure 12, can be every by the left side for a kind of circulation etched diffraction grating EDGR
The Wavelength routing of Single port input is to corresponding output port.With reference to λ in Fig. 611With λ22Exchange process, when the system be 4 it is defeated
Enter optical fiber, there is 4 channels in every input optical fibre, i.e., when 4 × 4, each channel in input optical fibre through the first space optical path by
After device 3 forwards, 4 wavelength of optical signal into the first output port of the first spatial light router 3 are respectively λ11=
1549.64nm λ22=1550.44nm, λ33=1551.24nm, λ44=1552.04nm.λ11Through first time wavelength convert, will believe
Number it is carried in λ2On=1550.0nm.It is the first input port transmission spectrum example of the 3rd spatial light router 6 such as Figure 13.λ11
With λ2Simultaneously into the first input port of the 3rd spatial light router 6, but due to λ11The 3rd spatial light router 6 is not met
Condition of work, so have more than 28dB loss, and λ2Only 2dB losses left and right, greatly reduces former optical signal λ11To follow-up
The influence of routing procedure.Pass through forwarding, λ2Exported in the second output port of the 3rd spatial light router 6.
The route bandwidth of the present invention is mainly by active device (including semiconductor optical amplifier and tunable laser etc.)
Dynamic response bandwidth limits.In a wdm system, the wavelength handoff response time of Wavelength tunable laser is directly determined with ripple
The optical signal bag transmitted response time of a length of foundation.This routing infrastructure experienced wavelength convert twice, then the typical case of system is most long
Response time is：
ttot=2 × tswitch+tc
Wherein, tcFor a passage routed path processing time, tswitchFor the letter of tunable laser in wavelength shifter
Road switching time.Total response time ttotAlso light data bag queue delay is reflected, and it is it is thus determined that adjacent in a passage
Minimum interval needed between two optical signal data queues.By taking V-type coupled cavity lasers as an example, electrical pumping tuning channel
Switching time about 500ps.Based on current very large scale integration technology (VLSI technology), tcIt can be estimated as
0.5ns.Single-chip integration Wavelength transformational structure based on SOA can complete 10Gb/s~40Gb/s wavelength convert.In 40Gb/s
In the case of, the response time t of systemtotSignal congestion will not be caused, i.e., this All-optical routing device is estimated can complete N2×40Gb/s
Data route.Thus, the present invention enjoys bigger bandwidth compared to traditional optical-electrical-optical router and existing optical routing structure, can
Complete the light data processing of playout length and exchange.
The afforded maximum routed channels number of the present invention is N2, i.e. N roots input optical fibre, the number of channel in every optical fiber
Mesh≤N.When increasing input optical fibre number, it is only necessary to redesign three spatial light routers 3,6,9, make its port number with
Input optical fibre number is consistent, while channel spacing meets incident optical signal needs.In wavelength convert and routing module A twice
Wavelength convert design need not be changed, and only need linearly increasing number as desired.
In the present invention, AWG devices at 8 liang of optical demultiplexer 4 and optical multiplexer can also use etched diffraction grating EDG or
Multi-mode interference coupler MMI is substituted, and the EDGR devices at three spatial light routers 3,6,9 can also use AWGR devices to substitute.
Above-described embodiment is used for illustrating the present invention, rather than limits the invention.The present invention spirit and
In scope of the claims, to any modifications and changes of the invention made, protection scope of the present invention is both fallen within.
Claims (9)
1. a kind of modular wavelength and space All-optical routing device, it is characterised in that：Including the first spatial light router（3）, ripple
Long conversion and routing module（A）And second space optical router（9）；First spatial light router（3）Input port and N root lists
Mould input optical fibre is connected, and each optical signal being multiplexed in single mode input fiber is routed into the first spatial light router（3）Each
On corresponding output port；Then the first spatial light router（3）Output port through each wavelength convert and routing module（A）
With second space optical router（9）Input port connection, by the optical signal of every group of different wave length by wavelength convert processing pass
It is sent to second space optical router（9）In each self-corresponding input port；Second space optical router（9）Will by wavelength convert and
Routing module（A）The optical signal of every group of different wave length of output is sent to second space optical router（9）Each self-corresponding output
Port；Second space optical router（9）Output port is connected with N root single-mode output optical fiber, and output light is signally attached to each
Corresponding single-mode output optical fiber；First spatial light router（3）With second space optical router（9）Mirror image works so that by the
Two spatial light routers（9）Each wavelength of optical signal and the first spatial light router in every road optical fiber of output（3）It is each right
Each wavelength of optical signal in the input optical fibre answered is consistent；
Described wavelength convert and routing module（A）Including the optical demultiplexer being sequentially connected（4）, N number of first wave length converter
（5）, the 3rd spatial light router（6）, N number of second wave length converter（7）And optical multiplexer（8）；First spatial light router（3）
Optical demultiplexer is first passed through per the optical signal of road output port（4）Single wavelength signal is decomposed into, each Single wavelength signal is through respective
First wave length converter（5）It is transferred to the 3rd spatial light router（6）In, the 3rd spatial light router（6）To unicast long letter
Number carry out space route after again through second wave length converter（7）Optical multiplexer is sent to after wavelength convert（8）, optical multiplexer（8）
Each Single wavelength signal is merged into optical signal all the way and is output to second space optical router（9）；
3rd spatial light router（6）With the first spatial light router（3）, second space optical router（9）Interchannel be separated with
Deviation, prevent former optical signal from by the 3rd spatial light router（6）, former optical signal enters first wave length converter（5）, make letter
Number be loaded onto one group it is new with the 3rd spatial light router（6）The wavelength of channel matched, i.e., in wavelength convert and routing module（A）
It is middle that channel switch is completed using one group of different wave length；In wavelength convert module（A）In, pass through first wave length converter（5）, make through
Optical demultiplexer（4）Optical signal after demultiplexing is transferred on the light at one group of different wave length interval, by the 3rd space optical path by
Device（6）, then by second of wavelength shifter（7）, by the 3rd spatial light router（6）Optical signal after the route of space turns again
Shift to and meet second space optical router（9）The wavelength of channel spacing, continue to transmit.
2. a kind of modular wavelength according to claim 1 and space All-optical routing device, it is characterised in that：Described
One wavelength shifter（5）Or second wave length converter（7）Including the optical filter structure for filtering out optical signal before conversion.
3. a kind of modular wavelength according to claim 1 and space All-optical routing device, it is characterised in that：Described
One wavelength shifter（5）And second wave length converter（7）In do not include optical filter structure, the 3rd spatial light router（6）With
First spatial light router（3）, second space optical router（9）With different channel spacings so that single mode input fiber and
The wavelength of the optical signal transmitted in single-mode output optical fiber and the 3rd spatial light router（6）Transmission spectrum mismatch.
4. a kind of modular wavelength according to claim 1 and space All-optical routing device, it is characterised in that：Described light
Demultiplexer（4）For 1 × N optical demultiplexers, using array waveguide grating or diffraction etched diffraction grating（EDG）.
5. a kind of modular wavelength according to claim 2 and space All-optical routing device, it is characterised in that：Described light
Multiplexer（8）For the optical multiplexer of N × 1, using array waveguide grating, diffraction etched diffraction grating or multi-mode interference coupler.
6. a kind of modular wavelength according to claim 1 and space All-optical routing device, it is characterised in that：Described
One spatial light router（3）Or second space optical router（9）For circular array waveguide optical grating or circulation diffraction etched diffraction grating.
7. a kind of modular wavelength according to claim 1 and space All-optical routing device, it is characterised in that：Described
Three spatial light routers（6）For circular array waveguide optical grating or circulation diffraction etched diffraction grating.
8. a kind of modular wavelength according to claim 1 and space All-optical routing device, it is characterised in that：Described
One wavelength shifter（5）Or second wave length converter（7）To utilize the nonlinear effect of semiconductor optical amplifier by a wavelength
Optical signal is carried in the Wavelength transformational structure on the DC laser of another different wave length.
9. a kind of modular wavelength according to claim 1 and space All-optical routing device, it is characterised in that：Described
One spatial light router（3）, second space optical router（9）With wavelength convert and routing module（A）Completely or partially it is integrated in
On same chip.
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| CN105792032B (en) * | 2016-04-18 | 2021-12-21 | 浙江大学 | All-optical buffer based on arrayed waveguide grating router |
| CN111865472B (en) * | 2020-07-29 | 2021-07-20 | 浙江大学 | Bufferless optical interconnection architecture and method for data center |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2365238A (en) * | 2000-07-26 | 2002-02-13 | Ilotron Ltd | Arrayed waveguide optical router with wavelength converters |
| CN1381963A (en) * | 2002-06-06 | 2002-11-27 | 上海交通大学 | Multi-grain optical router based on optical burst switch |
| CN1427571A (en) * | 2001-12-18 | 2003-07-02 | 中国科学院半导体研究所 | Light up and down path bifurcation multiplex apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2365238A (en) * | 2000-07-26 | 2002-02-13 | Ilotron Ltd | Arrayed waveguide optical router with wavelength converters |
| CN1427571A (en) * | 2001-12-18 | 2003-07-02 | 中国科学院半导体研究所 | Light up and down path bifurcation multiplex apparatus |
| CN1381963A (en) * | 2002-06-06 | 2002-11-27 | 上海交通大学 | Multi-grain optical router based on optical burst switch |
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