CN204203497U - A kind of wavelength of modular extendable and space All-optical routing device - Google Patents
A kind of wavelength of modular extendable and space All-optical routing device Download PDFInfo
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- CN204203497U CN204203497U CN201420600718.XU CN201420600718U CN204203497U CN 204203497 U CN204203497 U CN 204203497U CN 201420600718 U CN201420600718 U CN 201420600718U CN 204203497 U CN204203497 U CN 204203497U
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Abstract
The utility model discloses a kind of wavelength and space All-optical routing device of modular extendable.After N root single mode input fiber connects first group of wavelength convert and routing module, enter the first spatial light router, its output is connected to second group of wavelength convert and routing module, again after wavelength convert and route, be connected with the input port of second space optical router, its output port and N root single-mode output Fiber connection, complete the route of light signal to respective corresponding single-mode output optical fiber; First spatial light router and the work of second space optical router mirror image.The utility model is used for, in division multiplex fibre-optic communication wave system, can realizing exchanging arbitrarily between the N road light signal in optical fiber, completing light signal and route to any output port from input port, realize signal exchange between optical fiber; And by the cascade of wavelength convert and routing module and linearly increase, realize more complete routing function, increase routed channels number.Whole routing infrastructure can realize integrated by Planar Lightwave Circuit Technology.
Description
Technical field
The utility model relates to optical fiber communication All-optical routing technology, especially relates to a kind of wavelength and space All-optical routing device of modular extendable.
Background technology
After optical fiber birth also successful Application, Fibre Optical Communication Technology fast development, the utility model of WDM communication mode makes fiber optic communications bandwidth greatly improve.Increasing rapidly of optical fiber communication data directly proposes requirements at the higher level to each processing node in optical communication network, and all-optical communication network becomes the developing direction of following optical communication network.
An important way of signal route in WDM optical-fiber network that to take wavelength as the light signal Packet forwarding of foundation be.Current mainstream technology many employings light-electrical-optical wavelength convert and the processing mode of route, its advantage is technically more ripe, timing, regeneration, shaping feature can be realized, but this scheme is owing to introducing light-to-current inversion and Clock Extraction, need the high speed optoelectronic instrument of a lot of high cost, high power consumption, to signal bit rate and signal format opaque, there is " electronic bottleneck " problem in conversion speed, do not meet the demand for development of all-optical network " high data throughput; high signal transacting bandwidth, low energy consumption ".Also has a kind of routing infrastructure based on micro electromechanical system switch (MEMS-Switches), commercial devices report " Glimmerglass Intelligent Optical System " having had support 32 input/output end port to exchange, tables of data can be
www.glimmerglass.comobtain.But it is long that the greatest drawback of this structure is channel switch time, reach a millisecond magnitude, to be only applicable between a pair node Continued communication time span in the situation of second-time.
All-optical routing does not need through electrical domain process, directly by information from a light wavelength conversion to another optical wavelength, by the forwarding of optical passive component, reach route object.The modules such as Optical Demultiplexing, wavelength convert, recovery use, optical routing are mainly contained in wdm system optical router.Problem that All-optical routing does not exist " electronic bottleneck ", bandwidth is huge, to signal rate and form transparent, and single chip integrated All-optical routing chip energy consumption more will reduce than light-electrical-optical route greatly.
The All-optical routing device of current proposition mainly contains photoswitch, passive array waveguide grating device and based semiconductor image intensifer (SOA) wavelength convert two kinds." Multi-path Routing in an MonolithicallyIntegrated 4 × 4 Broadcast and Select WDM Cross-connection ", ECOC, September18-22,2011, InP PHOTONICS (Mo.2.LeSaleve) reports the interconnection of a kind of all-optical cross based on SOA photoswitch, and this structure achieves 4 × 4 light signal cross-connects.This All-optical routing mode selects module and wavelength chooses module 2 part to form primarily of broadcast.Select in module in broadcast, the light signal of 4 input ports is input to the input port of each array waveguide grating (AWG) respectively by cascade multi-mode interference coupler (MMI).Before entering AWG, often there is SOA switch on the way, by the electric current regulating SOA to inject, control the break-make on each road.After the forwarding of 4 circulations 4 × 4 arrayed-waveguide grating routers (AWGR), signal enters wavelength chooses module.According to routing table design, adjusting wavelength selects SOA electric current on each output port of modules A WG, the wavelength of the latter linked cascade MMI Shang Ge road signal that can determine, and then can reach the wavelength controlling each road on whole router chip output terminal.But, the method can only carry out the forwarding of different input port light signal, and original signal can not be transferred on another wavelength, and along with the increase of input signal channel number (N), need correspondingly to be increased to N number of circulation N × NAWGR and 2N SOA switch.Meanwhile, each road input signal all will extend to N number of output port through cascade MMI, and whole route system single-side pin number is N
2individual, greatly can increase device size.This chip structure is extremely unfavorable for the expansion of channel number, increases by a road signal, and the design of whole chip all will change, and device layout difficulty increases greatly." An 8x8 InP Monolithic Tunable OpticalRouter (MOTOR) Packet Forwarding Chip ", Journal of Lightwave Technology, Vol.28, Issue 4, pp.641-650 discloses a kind of optical routing mode based on SOA wavelength convert.This mode by being transferred on the new wavelength that tunable laser sends through the intermodulation effect of SOA by original signal, then is forwarded to respective channels with AWGR.But this structure transfer capability is limited, in optical-fiber network aspect, the signal exchange between many optical fiber is not proposed.
Above-mentioned All-optical routing structure all completely can not realize the wavelength convert of All-optical routing in optical-fiber network and the functional requirement of port transparent forwarding, and the extendability of system is good not.
Summary of the invention
For the deficiencies in the prior art, the purpose of this utility model is the wavelength and the space All-optical routing device that propose a kind of modular extendable.
The technical solution adopted in the utility model is:
The utility model comprises the first spatial light router, two groups of wavelength convert and routing module and second space optical router; Be connected with one group of wavelength convert and routing module between N root single mode input fiber and the first spatial light router, by this group wavelength convert and routing module each channel in each multiplexing for single mode input fiber light signal carried out wavelength convert and route processing is sent in the first spatial light router; The output port of the first spatial light router is connected with the input port of second space optical router through another group wavelength convert and routing module, is sent in each self-corresponding input port of second space optical router by the light signal often organizing different wave length through wavelength convert process; The light signal often organizing different wave length exported by another group wavelength convert and routing module is sent to each self-corresponding output port of second space optical router by second space optical router; Second space optical router output port and N root single-mode output Fiber connection, be connected to each self-corresponding single-mode output optical fiber by output optical signal; First spatial light router and the work of second space optical router mirror image, make each wavelength of optical signal in the every road optical fiber exported by second space optical router consistent with each wavelength of optical signal in each self-corresponding input optical fibre of the first spatial light router.
Described wavelength convert and routing module comprise the optical demultiplexer connected successively, N number of first wave length converter, the 3rd spatial light router, N number of second wave length converter and optical multiplexer; The light signal of first spatial light router every road output port is first decomposed into Single wavelength signal through optical demultiplexer, each Single wavelength signal is transferred in the 3rd spatial light router through respective first wave length converter, 3rd spatial light router is sent to optical multiplexer after carrying out space route to Single wavelength signal again after second wave length converter wavelength convert, and each Single wavelength signal is merged into a road light signal and outputted to second space optical router by optical multiplexer.
Described first wave length converter or second wave length converter comprise the optical filter structure of light signal filtering before conversion.
Optical filter structure is not comprised in described first wave length converter and second wave length converter, 3rd spatial light router has different channel spacings from the first spatial light router, second space optical router, and the wavelength of the light signal transmitted in single mode input fiber and single-mode output optical fiber is not mated with the transmission spectrum of the 3rd spatial light router.
Described optical demultiplexer is 1 × N optical demultiplexer, adopts array waveguide grating or diffraction etched diffraction grating.
Described optical multiplexer is N × 1 optical multiplexer, adopts array waveguide grating, diffraction etched diffraction grating or multi-mode interference 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 utilize the nonlinear effect of semiconductor optical amplifier the light signal of one wavelength to be carried in Wavelength transformational structure 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 can be all integrated or according to sectorization territory is on the same chip partly integrated.
The beneficial effects of the utility model are:
Based on wavelength convert and routing module, there is fabulous expansion, reduce the design difficulty of All-optical routing, there is the effect of space route and wavelength convert simultaneously, the channel switch between any exchange of N number of channel in same optical fiber and input end different fiber can be realized.
The utility model clear logic, the function completely can realize signal wavelength conversion in All-optical routing, forwarding, and completely transparent to the signal format of light.
The utility model compares traditional light-electrical-optical router and existing optical routing structure enjoys larger bandwidth, can complete the light data processing of more high bit rate, exchange.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the structural representation of the utility model wavelength convert and routing module.
Fig. 3 is the utility model first spatial light router routed path schematic diagram.
Fig. 4 is the utility model second space optical router routed path schematic diagram.
Fig. 5 is the utility model the 3rd spatial light router routing table schematic diagram.
Fig. 6 is the utility model All-optical routing working method example.
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 structural drawing of embodiment.
Figure 10 is the second wavelength shifter structural drawing of embodiment.
Figure 11 is wavelength shifter principle of signal conversion and the design sketch of embodiment.
Figure 12 is the spatial light router schematic diagram of embodiment.
Figure 13 is the first input end mouth transmitted spectrum schematic diagram of the 3rd spatial light router of embodiment.
In figure: A, wavelength convert and routing module, 3, the first spatial light router, 4, optical demultiplexer, 5, first wave length converter, 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, 11, nonlinear optical amplifier, 12, time delay waveguide, 13, linear optical amplifier, 14, phase converter.
Embodiment
Below in conjunction with drawings and Examples, the utility model is further described.
As shown in Figure 1, whole router is formed primarily of the first spatial light router three, two groups of wavelength convert and routing module A and second space optical router 9; Be connected with one group of wavelength convert and routing module A between N root single mode input fiber and the first spatial light router three, by this group wavelength convert and routing module A, each channel in each multiplexing for single mode input fiber light signal carried out wavelength convert process and be sent in the first spatial light router three; The output port of the first spatial light router three is connected with the input port of second space optical router 9 through another group wavelength convert and routing module A, is sent in each self-corresponding input port of second space optical router 9 by the light signal often organizing different wave length through wavelength convert process; The light signal often organizing different wave length exported by another group wavelength convert and routing module A is sent to each self-corresponding output port of second space optical router 9 by second space optical router 9; Second space optical router 9 output port and N root single-mode output Fiber connection, be connected to each self-corresponding single-mode output optical fiber by output optical signal; First spatial light router three and the work of second space optical router 9 mirror image, make each wavelength of optical signal in the every road optical fiber exported by second space optical router 9 consistent with each wavelength of optical signal in each self-corresponding input optical fibre of the first spatial light router three.
Often organize wavelength convert in wavelength convert and routing module A and routing module A quantity all identical with the radical of single mode input fiber.
As shown in Figure 2, in system, each wavelength convert and routing module A design all identical, comprise the optical demultiplexer 4 connected successively, 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, be responsible for wavelength convert and the route of the one group of N number of wavelength channels carrying out a spatial light router three output port.
As shown in Figure 2, the light signal of first spatial light router three every road output port is first decomposed into Single wavelength signal through optical demultiplexer 4, each Single wavelength signal is transferred in the 3rd spatial light router 6 through respective first wave length converter 5, after second wave length converter 7 wavelength convert, be sent to optical multiplexer 8 again after 3rd spatial light router 6 pairs Single wavelength signal carries out space route, each Single wavelength signal is merged into a road light signal and is outputted to second space optical router 9 by optical multiplexer 8.
Preferably, first wave length converter 5 or second wave length converter 7 comprise optical filter structure, and the optical filter structure of first wave length converter 5 or second wave length converter 7 will change front light signal filtering.
Preferably, when not comprising optical filter in first wave length converter 5 and second wave length converter 7, can there is former light signal and the rear light signal of conversion in the output port of first wave length converter 5 and second wave length converter 7 simultaneously.If the 3rd spatial light router 6 designs identical with the first spatial light router three, second space optical router 9, then former light signal can route to a certain output port of 3, interference route to this port export conversion after light signal.For avoiding former light signal to light signal crosstalk after conversion, i.e. light signal crosstalk in each port in the 3rd spatial light router 6,3rd spatial light router 6 has different channel spacings from the first spatial light router three, second space optical router 9, and the wavelength of the light signal transmitted in single mode input fiber and single-mode output optical fiber is not mated with the transmission spectrum (i.e. transmitted spectrum) of the 3rd spatial light router 6.
During concrete enforcement, for two groups of wavelength convert and routing module A, make the 3rd spatial light router 6 and the first spatial light router three, the interchannel of second space optical router 9 is separated with certain deviation, make former light signal not by the 3rd spatial light router 6.Former light signal enters first wave length converter 5, makes the wavelength that signal loading to group is new, with the 3rd spatial light router 6 channel matched, in wavelength convert and routing module A, namely adopts one group of different wave length to complete channel switch.In wavelength convert modules A, by first time wavelength shifter 5, the light signal after optical demultiplexer 4 demultiplexing is made to transfer on the light at one group of different wave length interval, by the 3rd spatial light router 6, pass through second time wavelength shifter 7 again, light signal after 3rd spatial light router 6 space route is converted to the wavelength meeting second space optical router 9 channel spacing again, continues transmission.
Optical demultiplexer 4 is 1 × N optical demultiplexer, is the optical passive component of the single ended input designed by the wavelength interval of channel N number of in input optical fibre, the output of N number of port Single wavelength, preferred employing array waveguide grating AWG or diffraction etched diffraction grating EDG.
Optical multiplexer 8 is N × 1 optical multiplexer, and the Single wavelength light signal for N number of input merges into the optical passive component that single port exports, preferred employing array waveguide grating AWG, diffraction etched diffraction grating EDG or multi-mode interference coupler MMI.
Preferred first spatial light router three, second space optical router 9 can be identical or not identical with the 3rd spatial light router 6, can adopt 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 not identical, are specially and utilize the nonlinear effect of semiconductor optical amplifier SOA the light signal of one wavelength to be carried in Wavelength transformational structure on the DC laser of another different wave length.
Preferably, first wave length converter 5 or second wave length converter 7 can adopt structure as shown in Figure 9, comprise tunable laser 10, nonlinear optical amplifier 11 and time delay waveguide 12, the detection light that tunable laser 10 sends and flashlight are through waveguide connected nonlinearity image intensifer 11 input end, and the output terminal of nonlinear optical amplifier 11 connects optical waveguide and the rear output signal of time delay waveguide 12 respectively.
Preferably, first wave length converter 5 or second wave length converter 7 can adopt structure as shown in Figure 10, comprise tunable laser 10, nonlinear optical amplifier 11, time delay waveguide 12, linear optical amplifier 13 and phase converter 14, flashlight is divided into two-way, respective linear optical amplifier 13 input end is connected after time delay waveguide 12 respectively through optical waveguide, tunable laser 10 sends two-way detection light, two linear optical amplifier 13 output terminals are coupled through coupling mechanism with the output terminal of each self-corresponding tunable laser 10, the signal of two linear optical amplifier 13 output terminals is detected light with the two-way of tunable laser 10 be coupled respectively, respective nonlinear optical amplifier 11 input end is connected to after forming two ways of optical signals, final light signal is exported after being coupled with the output terminal of the nonlinear optical amplifier 11 on another road after one of them nonlinear optical amplifier 11 output terminal connection phase converter 14 of two-way nonlinear optical amplifier 11.
Above-mentioned tunable laser is tunable semiconductor laser, and nonlinear optical amplifier 11 adopts nonlinear optical amplifier, and linear optical amplifier 13 adopts linear semiconductor image intensifer.
N of the present utility model is positive integer, when needed, only need increase input and output number of fibers, and corresponding increase by three spatial light router threes, 6, the number of 9 port numbers and wavelength convert and routing module A, wherein wavelength convert and routing module A design and construction all identical.
Principle of work of the present utility model is as follows:
In the utility model, each signal wavelength subscript occurred in figure is the same, represents wavelength the same.The one group of wavelength of optical signal matrix transmitted in input optical fibre is such as formula 1.Wherein subscript first digit i represents optical fiber sequence number, and second digit j represents channel designator, such as λ
12represent second channel wavelength of first input optical fibre.
Wherein, the first spatial light router three designs identical with second space optical router 9, and mirror image uses, and is have identical Free Spectral Range Δ λ
fSR, same channel interval delta
vaWGR or EDGR passive device, match with every root optical fiber input signal wavelength coverage and wavelength interval.First spatial light router three routed path is as Fig. 3.After route, output port wavelength matrix is such as formula 2, and wherein every a line represents the wavelength of a spatial light router corresponding output port:
Second space optical router 9 routed path as Fig. 4, after wavelength convert module, the wavelength matrix of each port input such as formula 2 output port wavelength matrixes such as formula 3:
In wavelength convert and routing module A, can realize covering very broadband wavelength convert based on the first wave length converter 5 of tunable laser, SOA and MZI and second wave length converter 7, input optical signal can be carried in any wavelength light that tunable laser can export.For avoiding crosstalk between light signal and original signal after wavelength convert, design the 3rd spatial light router 6, make it have different operation wavelengths from the first spatial light router three, second space optical router 9, former light signal is by just having very large decay after the 3rd spatial light router 6.By first time wavelength convert, one group that former light signal is carried in mate with 3 new wavelength X
1, λ
2, λ
3... λ
non.3rd spatial light router 6 routing table is as Fig. 5.Through the forwarding of the 3rd spatial light router 6, after conversion, light signal enters second time wavelength convert at corresponding ports, wavelength now after conversion should meet the needs of second space optical router 9, in like manner, light signal before conversion, by also having very lossy after second space optical router 9, avoids the crosstalk between channel.
Be exchanged for example with several representative channel below, introduce concrete routing procedure:
(1) in same optical fiber, different channels exchanges
If in an optical fiber, some channel needs to exchange, then can as shown in Figure 6, every root input optical fibre all connects a wavelength convert and routing module A, with the λ in input optical fibre LN
n1with λ
n3be exchanged for example, then first in first wavelength convert and routing module, λ
n1with λ
n3enter first respectively through demultiplexing, third channel.By λ
n1be converted to λ
3, λ
n3be converted to λ
3, the 3rd spatial light router in this wavelength convert and routing module, respectively second time wavelength convert the 3rd, first passage is converted to λ
n1, λ
n3, multiplexing rear output, completes the signal exchange in optical fiber.
(2), in different fiber, same logical channel exchanges
Same logical channel refers in different fiber, if directly forward through the first spatial light router three, enter the wavelength of the same output port of the first spatial light router three, namely in formula 2, each provisional capital of matrix is one group of same logical channel.With λ
11and λ
22be exchanged for example, as Fig. 6, first, λ
11and λ
22respectively from input optical fibre L1, L2 through first group of wavelength convert and routing module, remain λ
11, λ
22, be sent to first, second input port of the first spatial light router three, enter first in another group wavelength convert and routing module through route.In another group wavelength convert and routing module, λ
11through first time wavelength convert to λ
2, forward through the 3rd spatial light router 6, enter second time wavelength convert second channel, then wavelength convert be to λ
22.In like manner, λ
22through first time wavelength convert to λ
2, forward through the 3rd spatial light router 6, λ
2enter second time wavelength convert first passage, then wavelength convert is to λ
11.λ
11with λ
22after multiplexer 8 is multiplexing, enter second space optical router 9, be forwarded to output optical fibre L1 ', L2 ' respectively.Then complete λ in input optical fibre L1
11with λ in input optical fibre L2
22the complete exchange of port and wavelength.
Because the output port of each the first spatial light router three comprises the corresponding same logical channel from each root input optical fibre, therefore, the arbitrary channel in input optical fibre all can the complete exchange of the same logical channel completing port corresponding with an other optical fiber and wavelength.
(3) in different fiber, Different Logic channel switch
With the λ in input optical fibre L1
12with the λ in input optical fibre L2
22be exchanged for example, as Fig. 6.First, λ
12and λ
22respectively from input optical fibre L1, L2 through first group of wavelength convert and routing module, remain λ
12, λ
22, be sent to first, second input port of the first spatial light router three, enter second and first in another group wavelength convert and routing module through route.In another group wavelength convert and routing module, λ
22first time, wavelength convert was to λ
2, forward through the 3rd spatial light router 6, λ
2enter second time wavelength convert first passage, then wavelength convert is to λ
11, after multiplexer 8 is multiplexing, enter second space optical router 9.In like manner, λ
12through first time wavelength convert, by its contained signal loading at λ
4, route to the third channel of second time wavelength convert, then by signal loading at λ
23.λ
11and λ
23forward through second space optical router 9 and enter output optical fibre L1 ', L2 ' respectively.
With the channel switch in the first situation unlike, in this case, λ in input optical fibre L1
12be converted to λ in output optical fibre L2 '
23, λ in input optical fibre L2
22be converted to λ in output optical fibre L1 '
11, before and after route, wavelength is inconsistent.
The utility model is except realizing various functional module by Fiber connection system of building, can also be realized on chip by active passive integrated technology, comprising based on the repeatedly extension of III-V wafer or quantum well mixing technique single-chip integration, the accurate bonding hybrid integrated of III-V and SOI.
All structures that the utility model comprises, as the first spatial light router three, second space optical router 9 and wavelength convert and routing module A all can be all or part of on the same chip integrated.
Wherein, partly integrated specifically can be integrated according to device function subregion, in such as wavelength convert and routing module A, each wavelength shifter 5 can be integrated into a device, after array, be connected with other devices such as the 3rd spatial light router 6, multiplexer 8, demodulation multiplexers 4 by optical fiber, expand to whole wavelength convert and routing module.Wavelength convert and routing module is same with between the first spatial light router three and second space optical router 9 adopts Fiber connection.
Specific implementation process of the present utility model:
Optical demultiplexer 4 adopts a kind of AWG structure as shown in Figure 7, at the light signal that demodulation multiplexer input port has one group of wavelength different, through AWG device, is divided into N road, exports from demodulation multiplexer output port.
Optical multiplexer 8 adopts a kind of AWG structure as shown in Figure 8, and the N number of port in multiplexer inputs mouth place inputs the light signal of different wave length respectively, through AWG, is combined into a road, exports from multiplexer output terminal mouth.
Two groups of wavelength shifters 5,7 are selected to adopt structure as shown in Figure 9, Figure 10.Tunable laser 10 can pass through the mode such as pulse current injectingt or thermal tuning, obtains DC laser.As shown in Figure 9, the detection light that tunable laser 10 sends enters nonlinear optical amplifier 11 together with flashlight, and the two is modulated by Nonlinear and crossing, and detection light will load signal.Due to the restriction of semiconductor devices carrier lifetime, when high speed cross modulation, the change that the signal intensity of detection light, phase place change with flashlight and occur has conditions of streaking.Such as quantum well structure semi-conductor chip, carrier lifetime is about a few nanosecond ns, obviously can not meet 10GHz and above cross modulation response demand.By time delay waveguide 12, make detection light through the upper and lower two-arm of different length, arrive output port with the mistiming of Δ t.As shown in Figure 11 A, there is a phase differential in now two-way detection light
by optimizing phase differential
former detection light " hangover " effect can be eliminated after the two bundle detection interference of light, phase information is converted into strength information, improve signal quality, as Figure 11 B.Structure shown in Figure 10 is then first incoming signal light is divided into two-way, and time delay waveguide 12 of leading up to below makes the two retention time difference Δ t, by linear amplifier 13, two paths of signals luminous power is balanced.The 10 detection light sent also are divided into 2 tunnels, enter non-linear amplifier 11 respectively with upper arm, underarm flashlight after being coupled as a road.Equally, in 11, there is the cross modulation of detection light and flashlight, then detect the phase differential of light by the upper and lower two-arm of phase converter 14 optimizing regulation
as Figure 11, obtain detection light signal preferably and export.
The signal lag of the two-arm up and down Δ t provided of time delay waveguide 14 determines according to signal rate.If input signal is 10Gbit/s return-to-zero code, then Δ t is about 0.05ns.If the phase differential of two-arm detection light signal is 180 ° up and down, then can interferes delustring completely, reach maximum extinction ratio.
Three spatial light router threes, 6,9 as shown in figure 12, are one circulation etched diffraction grating EDGR, can by the Wavelength routing of every for left side Single port input to corresponding output port.λ in composition graphs 6
11with λ
22exchange process, when native system is 4 input optical fibres, in every root input optical fibre, have 4 channels, namely 4 × 4 time, each channel in input optical fibre is after the first spatial light router three forwards, and 4 wavelength of optical signal entering the first output port of the first spatial light router three are respectively λ
11=1549.64nm, λ
22=1550.44nm, λ
33=1551.24nm, λ
44=1552.04nm.λ
11through first time wavelength convert, by signal loading at λ
2on=1550.0nm.As Figure 13, it is the first input end mouth transmission spectrum example of the 3rd spatial light router 6.λ
11with λ
2enter the first input end mouth of the 3rd spatial light router 6 simultaneously, but due to λ
11do not meet the condition of work of the 3rd spatial light router 6, so there is the loss of more than 28dB, and λ
2about only having 2dB loss, greatly reduce former light signal λ
11on the impact of follow-up routing procedure.By forwarding, λ
2export at the second output port of the 3rd spatial light router 6.
Route bandwidth of the present utility model mainly limits by the dynamic response bandwidth of active device (comprising semiconductor optical amplifier and tunable laser etc.).In a wdm system, the wavelength handoff response time of Wavelength tunable laser directly determines with wavelength is light signal Packet forwarding response time of foundation.The utility model routing infrastructure experienced by four wavelength convert, then the typical longest response time t of system
totfor:
t
tot＝4×t
switch+t
c
Wherein, t
cbe a passage routed path processing time, t
switchfor the channel switch time of tunable laser in wavelength shifter.Total response time t
totalso reflect the time delay of bright dipping data packet queue, and therefore determine minimum interval required between adjacent two optical signal data queues in a passage.For V-type coupled cavity lasers, electrical pumping tuned channel is about 500ps switching time.Based on current very large scale integration technology (VLSI technology), t
c0.5ns can be estimated as.Single-chip integration Wavelength transformational structure based on SOA can complete the wavelength convert of 10Gb/s ~ 40Gb/s.In 40Gb/s situation, the response time t of system
totsignal can not be caused to block up, and namely this All-optical routing device can complete N
2the data route of × 40Gb/s.Thus, the utility model compares traditional light-electrical-optical router and existing optical routing structure enjoys larger bandwidth, can complete the light data processing of more high bit rate, exchange.
The maximum routed channels number that the utility model can be born is N
2, i.e. N root input optical fibre, the channel number≤N in every root optical fiber.When increasing input optical fibre number, only needing redesign three spatial light router threes, 6,9, its port number and input optical fibre number are consistent, channel spacing meets incident optical signal needs simultaneously.In wavelength convert and routing module A, twice wavelength convert design does not need change, only linearly need increase number according to demand.
In the utility model, the AWG device at optical demultiplexer 4 and optical multiplexer 8 liang place also can substitute with etched diffraction grating EDG or multi-mode interference coupler MMI, three spatial light router threes, 6, the EDGR device at 9 places also can substitute with AWGR device.
Above-described embodiment is used for explaining and the utility model is described, instead of limits the utility model.In the protection domain of spirit of the present utility model and claim, any amendment make the utility model and change, all fall into protection domain of the present utility model.
Claims (10)
1. the wavelength of modular extendable and a space All-optical routing device, is characterized in that: comprise the first spatial light router (3), two groups of wavelength convert and routing module (A) and second space optical router (9); Be connected with one group of wavelength convert and routing module (A) between N root single mode input fiber and the first spatial light router (3), by this group wavelength convert and routing module (A) each channel in each multiplexing for single mode input fiber light signal carried out wavelength convert and route processing is sent in the first spatial light router (3); The output port of the first spatial light router (3) is connected with the input port of second space optical router (9) through another group wavelength convert and routing module (A), is sent in each self-corresponding input port of second space optical router (9) by the light signal often organizing different wave length through wavelength convert process; Second space optical router (9) is sent to each self-corresponding output port of second space optical router (9) by being organized the light signal often organizing different wave length that wavelength convert and routing module (A) export by another; Second space optical router (9) output port and N root single-mode output Fiber connection, be connected to each self-corresponding single-mode output optical fiber by output optical signal; First spatial light router (3) and second space optical router (9) mirror image work, make each wavelength of optical signal in the every road optical fiber exported by second space optical router (9) consistent with each wavelength of optical signal in each self-corresponding input optical fibre of the first spatial light router (3).
2. the wavelength of a kind of modular extendable according to claim 1 and space All-optical routing device, is characterized in that: described wavelength convert and routing module (A) comprise the optical demultiplexer (4), N number of first wave length converter (5), the 3rd spatial light router (6), N number of second wave length converter (7) and the optical multiplexer (8) that connect successively; The light signal of the first spatial light router (3) every road output port is first decomposed into Single wavelength signal through optical demultiplexer (4), each Single wavelength signal is transferred in the 3rd spatial light router (6) through respective first wave length converter (5), after second wave length converter (7) wavelength convert, be sent to optical multiplexer (8) again after 3rd spatial light router (6) carries out space route to Single wavelength signal, each Single wavelength signal is merged into a road light signal and is outputted to second space optical router (9) by optical multiplexer (8).
3. the wavelength of a kind of modular extendable according to claim 2 and space All-optical routing device, is characterized in that: described first wave length converter (5) or second wave length converter (7) comprise the optical filter structure of light signal filtering before conversion.
4. the wavelength of a kind of modular extendable according to claim 2 and space All-optical routing device, it is characterized in that: in described first wave length converter (5) and second wave length converter (7), do not comprise optical filter structure, 3rd spatial light router (6) has different channel spacings from the first spatial light router (3), second space optical router (9), and the wavelength of the light signal transmitted in single mode input fiber and single-mode output optical fiber is not mated with the transmission spectrum of the 3rd spatial light router (6).
5. the wavelength of a kind of modular extendable according to claim 2 and space All-optical routing device, is characterized in that: described optical demultiplexer (4) is 1 × N optical demultiplexer, adopts array waveguide grating (AWG) or diffraction etched diffraction grating (EDG).
6. the wavelength of a kind of modular extendable according to claim 2 and space All-optical routing device, is characterized in that: described optical multiplexer (8) is N × 1 optical multiplexer, adopts array waveguide grating, diffraction etched diffraction grating or multi-mode interference coupler.
7. the wavelength of a kind of modular extendable according to claim 1 and space All-optical routing device, is characterized in that: the first described spatial light router (3) or second space optical router (9) are circular array waveguide optical grating or circulation diffraction etched diffraction grating.
8. the wavelength of a kind of modular extendable according to claim 2 and space All-optical routing device, is characterized in that: the 3rd described spatial light router (6) is circular array waveguide optical grating or circulation diffraction etched diffraction grating.
9. the wavelength of a kind of modular extendable according to claim 2 and space All-optical routing device, is characterized in that: the light signal of a wavelength to be carried in Wavelength transformational structure on the DC laser of another different wave length for utilizing the nonlinear effect of semiconductor optical amplifier by described first wave length converter (5) or second wave length converter (7).
10. the wavelength of a kind of modular extendable according to claim 1 and space All-optical routing device, is characterized in that: described the first spatial light router (3), second space optical router (9) and wavelength convert and routing module (A) can be all integrated or according to sectorization territory is on the same chip partly integrated.
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| CN201420600718.XU CN204203497U (en) | 2014-10-16 | 2014-10-16 | A kind of wavelength of modular extendable and space All-optical routing device |
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| CN201420600718.XU CN204203497U (en) | 2014-10-16 | 2014-10-16 | A kind of wavelength of modular extendable and space All-optical routing device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104317000A (en) * | 2014-10-16 | 2015-01-28 | 浙江大学 | Modular, extendable wavelength and space all-optical router |
| WO2016090620A1 (en) * | 2014-12-12 | 2016-06-16 | 浙江大学 | Modularly extensible n2 × n2 wavelength and space all-optical router |
| CN113031163A (en) * | 2021-03-15 | 2021-06-25 | 中国科学院半导体研究所 | Optical filter structure and optical filter |
-
2014
- 2014-10-16 CN CN201420600718.XU patent/CN204203497U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104317000A (en) * | 2014-10-16 | 2015-01-28 | 浙江大学 | Modular, extendable wavelength and space all-optical router |
| CN104317000B (en) * | 2014-10-16 | 2018-05-08 | 浙江大学 | The wavelength and space All-optical routing device of modular extendable |
| WO2016090620A1 (en) * | 2014-12-12 | 2016-06-16 | 浙江大学 | Modularly extensible n2 × n2 wavelength and space all-optical router |
| CN113031163A (en) * | 2021-03-15 | 2021-06-25 | 中国科学院半导体研究所 | Optical filter structure and optical filter |
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