CN105393168B

CN105393168B - A kind of code conversion method and code pattern converter based on nonlinear effect

Info

Publication number: CN105393168B
Application number: CN201480000454.7A
Authority: CN
Inventors: 邓湘元; 廖奇
Original assignee: Huawei Technologies Co Ltd
Current assignee: Luo Sanjie
Priority date: 2014-04-24
Filing date: 2014-04-24
Publication date: 2018-07-31
Anticipated expiration: 2034-04-24
Also published as: WO2015161489A1; CN105393168A

Abstract

The embodiment of the present invention provides a kind of code conversion method and code pattern converter based on nonlinear effect, it is related to photoelectric communication field, realize that the conversion of amplitude modulation code OOK to phase-modulation code PSK, code pattern converter include using the Cross-phase Modulation of silicon waveguide or silicon nanowires：The pumping light generating apparatus and the first signal of N groups light generating apparatus are connected with N+1 Polarization Controller one-to-one correspondence respectively；The N+1 Polarization Controller is connected with first coupler；First coupler is connected with first non-linear optical waveguide, and first non-linear optical waveguide is connected with the filter.

Description

A kind of code conversion method and code pattern converter based on nonlinear effect

Technical field

The present invention relates to photoelectric communication field more particularly to a kind of code conversion methods and pattern based on nonlinear effect Converter.

Background technology

With the continuous development of computer technology, the bandwidth promotion that tradition is electrically interconnected is limited, and power consumption is big, novel light Interconnection technique can largely solve this problem.After light network, system is out low from processor or memory The first modulated optical signal for being converted into low speed of electric signal of speed, the serioparallel exchange by light are that the optical signal of high speed passes to realize Defeated and exchange.But the optical signal of low speed generally uses amplitude modulation code (On-Off Keying, OOK), the optical signal one of high speed As use phase-modulation code (Phase-Shift Keying, PSK), this allows for may having a variety of pumped FIR lasers simultaneously in system The case where depositing and needing conversion.

Amplitude modulation code OOK amplitudes signal-based just represent " 1 " " 0 ", have the advantages that modulation and demodulation are simple, Be adapted in wavelength-division multiplex system (WDM, Wavelength Division Multiplexing) but to polarization and dispersion compared with For sensitivity, therefore more it is suitable for transmitting and receiving terminal.

Correspondingly, phase-modulation code PSK is represented " 1 " " 0 " based on different phases.It is maintained in entire communication process solid Fixed light intensity.Common PSK codes have differential phase keying (DPSK) (DPSK, Differential Phase Shift Keying) and four Two kinds of phase-shift keying (PSK) (QPSK, Quadrature Phase Shift Keying).The two is not both to be DPSK code systems with 0, The change of π phases represents " 0 ", and " 1 ", and QPSK code systems can occur four phases such as 0, π, To represent " 00 " “01”“10”“11”.The problems such as signal caused by phase code can overcome waveguide dispersion effect deteriorates, can increase the appearance of transmission Amount and range, are the coding modes of great practical value in high-speed optical interconnection network.But its modulation demodulation system complexity is high, at This is also high, and there are certain requirements to Light source line width.

Therefore, in photo transmission system send and receiving terminal conveniently use low speed amplitude modulation code, and transmission and High-speed phase modulation code is used when exchange.This just needs to carry out different pumped FIR laser conversions.It is general at present for this problem Solution is to carry out pattern conversion using semiconductor amplifier (SOA, Semiconductor Optical Amplifier), Such as using semiconductor amplifier Mach-Zehnder (SOA-MZI) structure, utilize the Self-phase modulation in SOA link structures Cross gain effect (XGM, the Cross- of SOA in the ring mirror of effect (SPM, Self-Phase Modulation) or utilization SOA Gain Modulation) and the pattern of Cross-phase Modulation (XPM, Cross-phase Modulation) etc. convert (i.e. light intensity Cause the Cross-phase Modulation of SOA that intensity signal is made to be converted into phase information).However, since SOA is active device, it is above-mentioned Scheme can be limited by SOA carrier recovery times, and the reaction time is ns ranks, is not suitable for conversion and the biography of high speed signal Defeated process prevents itself and existing COMS techniques integrated technique from preferably merging in addition, the structure due to SOA limits.

Invention content

The embodiment of the present invention provides a kind of code conversion method and code pattern converter based on nonlinear effect, utilizes silicon The Cross-phase Modulation of waveguide/silicon nanowires realizes the conversion of amplitude modulation code OOK to phase-modulation code PSK, is greatly improving The parallel-serial conversion of multiple signals light is realized while code system conversion reaction time.

In order to achieve the above objectives, the embodiment of the present invention adopts the following technical scheme that：

In a first aspect, the embodiment provides a kind of code pattern converter, the code pattern converter includes N groups first Signal light generating apparatus, pump light generating apparatus, N+1 Polarization Controller, the first coupler, the first non-linear optical waveguide and Filter, N are the integer more than 0,

The pumping light generating apparatus and the first signal of N groups light generating apparatus respectively with the N+1 Polarization Control Device, which corresponds, to be connected；The N+1 Polarization Controller is connected with first coupler；First coupler with it is described First non-linear optical waveguide is connected, and first non-linear optical waveguide is connected with the filter；

Wherein, the first signal of N groups light generating apparatus, the amplitude modulation code OOK signal lights for generating different light intensity；

The pumping light generating apparatus, for generating pump light；

The N+1 Polarization Controller, the polarization of polarization state and the OOK signal lights for adjusting the pump light State, so that meeting scheduled relationship between the polarization state of the pump light and the polarization state of the OOK signal lights；

First coupler, for adjustment polarization state after the OOK signal lights and pump light couple；

First non-linear optical waveguide, the cross-phase for realizing waveguide by the OOK signal lights after coupling Mudulation effect, to change the phase pushing figure of the pump light after adjusting polarization state, first non-linear optical waveguide is cut Area is um²Magnitude；

The filter, for filtering out the pump light after changing phase pushing figure.

In the first possible realization method of first aspect, the code pattern converter further includes that inverter and second are non- Linear light waveguide,

The inverter is connected with first coupler；Second non-linear optical waveguide is connected with the inverter； First non-linear optical waveguide and second non-linear optical waveguide are connected with the filter respectively；

Wherein, the inverter is inverted for the light code to pump light and OOK signal lights after coupling, so that The signal light that OOK code systems are 1 is converted to the signal light that OOK code systems are 0, and it is 1 that the signal light that OOK code systems are 0, which is converted to OOK code systems, Signal light；

Second non-linear optical waveguide, the cross-phase for realizing waveguide by the OOK signal lights after radix-minus-one complement Mudulation effect, to change the phase pushing figure of the pump light after adjusting polarization state, second non-linear optical waveguide is cut Area is um²Magnitude.

In conjunction with the possible realization method of the first of first aspect above-mentioned and first aspect, the second of first aspect In kind possible realization method, the code pattern converter further includes M group second signals light generating apparatus, M Polarization Controller, the Two couplers and third non-linear optical waveguide, M are the integer more than 0,

The M groups second signal light generating apparatus is connected with M Polarization Controller one-to-one correspondence respectively；The M Polarization Controller is connected with second coupler；Second coupler, first non-linear optical waveguide and described Second non-linear optical waveguide is connected with the third non-linear optical waveguide；The third non-linear optical waveguide and the filter It is connected；

Wherein, the M groups second signal light generating apparatus, the amplitude modulation code OOK signal lights for generating different light intensity；

The M Polarization Controller, the polarization state of polarization state and the OOK signal lights for adjusting the pump light, So that meeting scheduled relationship between the polarization state of the pump light and the polarization state of the OOK signal lights；

Second coupler, the OOK signal lights for being generated to the M groups second signal light generating apparatus carry out coupling It closes；

The third non-linear optical waveguide, the Cross-phase Modulation for realizing waveguide by the OOK signal lights after coupling Effect, to change the phase pushing figure of the pump light after adjusting polarization state, the sectional area of the third non-linear optical waveguide For um²Magnitude.

In the third possible realization method of first aspect, as N=1, the first signal of N groups light generating apparatus For the first signal light generating apparatus, the N+1 Polarization Controller is respectively the first Polarization Controller and the second Polarization Controller,

The first signal light generating apparatus is connected with first Polarization Controller, the pumping light generating apparatus and institute The second Polarization Controller is stated to be connected；First Polarization Controller and second Polarization Controller are coupled with described first Device is connected；First non-linear optical waveguide is connected with first coupler, the first silicon waveguide or silicon nanowires with The filter is connected；

Wherein, the first signal light generating apparatus, for generating the first signal light or the OOK code systems that OOK code systems are 1 For 0 the first signal light；

The pumping light generating apparatus, for generating pump light；

First Polarization Controller and the second Polarization Controller, the polarization state for adjusting the pump light and described The polarization state of one signal light, so that meeting between the polarization state of the pump light and the polarization state of the OOK signal lights predetermined Relationship；

First coupler, for being coupled to the first signal light and pump light after polarization；

First non-linear optical waveguide, the friendship for realizing waveguide by adjusting first signal light after polarization state Phase-modulation effect is pitched, if the corresponding OOK code systems of first signal light are 1, changes the pumping after adjustment polarization state The phase pushing figure of light is π；If the corresponding OOK code systems of first signal light are 0, change the pump after adjustment polarization state The phase pushing figure of Pu light is 0；

The filter is the pump light of π or 0 for filtering out phase pushing figure, and then obtains phase shift keying codes DPSK codes The signal light of system.

In conjunction with the possible realization method of the first of first aspect above-mentioned and first aspect, the 4th of first aspect the In the possible realization method of kind, as N=1, the first signal of N groups light generating apparatus is the first signal light generating apparatus, institute It is respectively the first Polarization Controller and the second Polarization Controller to state N+1 Polarization Controller, wherein

The first signal light generating apparatus is connected with first Polarization Controller, the pumping light generating apparatus and institute The second Polarization Controller is stated to be connected；First Polarization Controller and second Polarization Controller with first coupler It is connected；First coupler is connected with first non-linear optical waveguide and the inverter respectively；The inverter and institute The second non-linear optical waveguide is stated to be connected；First non-linear optical waveguide and the second non-linear optical waveguide and the filter phase Even；

The pumping light generating apparatus, for generating pump light；

First Polarization Controller and the second Polarization Controller, the polarization state for adjusting the pump light and described The polarization state of one signal light, so that meeting between the polarization state of the pump light and the polarization state of first signal light predetermined Relationship；

First non-linear optical waveguide and the second non-linear optical waveguide, for realizing waveguide by first signal light Cross-phase modulation effect, if the corresponding OOK code systems of first signal light are 1, by the first non-linear optical waveguide Carry out obtaining the phase pushing figure of the pump light after Cross-phase Modulation beBy being handed in the second non-linear optical waveguide Obtaining the phase pushing figure of the pump light after fork phase-modulation isIt is i.e. non-thread by the first non-linear optical waveguide and second Property optical waveguide to carry out the total phase pushing figure of the pump light obtained after Cross-phase Modulation be π；If first signal light Corresponding OOK code systems are 0, then the pumping obtained after the first and second non-linear optical waveguides carry out Cross-phase Modulation Total phase pushing figure of light is 0；

In the 5th kind of possible realization method of first aspect, as N=2, the first signal of N groups light generating apparatus Respectively the first signal light generating apparatus and second signal light generating apparatus, the N+1 Polarization Controller are respectively first inclined Shake controller, the second Polarization Controller and third Polarization Controller, wherein

The first signal light generating apparatus is connected with first Polarization Controller, the second signal light generating apparatus It is connected with second Polarization Controller, the pumping light generating apparatus is connected with the third Polarization Controller；Described first Polarization Controller, the second Polarization Controller and third Polarization Controller are connected with first coupler；First coupling Clutch is connected with first non-linear optical waveguide；The first silicon waveguide or silicon nanowires are connected with the filter；

Wherein, the first signal light generating apparatus, for generating the first signal light or the OOK code systems that OOK code systems are 1 For 0 the first signal light, the second signal light generating apparatus, the second signal light or OOK for being 1 for generating OOK code systems The second signal light that code system is 0；

The pumping light generating apparatus, for generating pump light；

First Polarization Controller, the second Polarization Controller and third Polarization Controller are respectively used to adjust described The polarization state of the polarization state of one signal light, the polarization state of the second signal light and the pump light, so that the pumping Meet scheduled relationship, and the polarization state of the pump light and institute between the polarization state of light and the polarization state of first signal light It states and meets scheduled relationship between the polarization state of second signal light；

First coupler, for being coupled to the first signal light, second signal light and pump light after polarization；

First non-linear optical waveguide, the intersection for realizing waveguide by first signal light and second signal light Phase-modulation effect, if the corresponding OOK code systems of first signal light are 1, the corresponding OOK code systems of the second signal light are 0, The phase pushing figure that the pump light is then obtained according to cross-phase modulation effect is π；If the corresponding OOK of first signal light Code system is 0, and the corresponding OOK code systems of the second signal light are 1, then obtain the pump light according to cross-phase modulation effect Phase pushing figure isIf the corresponding OOK code systems of first signal light are 1, the corresponding OOK code systems of the second signal light are 1, then the phase pushing figure that the pump light is obtained according to cross-phase modulation effect isIf first signal light corresponds to OOK code systems be 0, the corresponding OOK code systems of the second signal light are 0, then obtain the pump according to cross-phase modulation effect The phase pushing figure of Pu light is 0；

The filter, for filter out phase pushing figure be π, Or 0 pump light, and then obtain phase shift keying codes The signal light of QPSK code systems.

In conjunction with the first to second possible realization method of first aspect above-mentioned and first aspect, in first aspect The 6th kind of possible realization method in, work as N=1, when M=1, the first signal of N groups light generating apparatus is the first signal light Generating means, the M groups second signal light generating apparatus are second signal light generating apparatus, the N+1 Polarization Controller point Not Wei the first Polarization Controller and the second Polarization Controller, the M Polarization Controller be third Polarization Controller, wherein

The first signal light generating apparatus is connected with first Polarization Controller, the second signal light generating apparatus It is connected with second Polarization Controller, the pumping light generating apparatus is connected with the third Polarization Controller；Described first Polarization Controller and third Polarization Controller are connected with first coupler；First coupler is non-with described first respectively Linear light waveguide is connected with the inverter；The inverter is connected with second non-linear optical waveguide；Described first is non-thread Property optical waveguide, the second non-linear optical waveguide and the second Polarization Controller are connected with second coupler；Second coupling Clutch is connected with the third non-linear optical waveguide, and the third non-linear optical waveguide is connected with the filter；

The pumping light generating apparatus, for generating pump light；

First non-linear optical waveguide and the second non-linear optical waveguide, for realizing waveguide by first signal light Cross-phase modulation effect, if the corresponding OOK code systems of first signal light be 1, enter the first non-linear optical waveguide in Carry out obtaining the phase pushing figure of the pump light after Cross-phase Modulation beInto being handed in the second non-linear optical waveguide Obtaining the phase pushing figure of the pump light after fork phase-modulation isIt is i.e. non-thread by the first non-linear optical waveguide and second Property optical waveguide to carry out the total phase pushing figure of the pump light obtained after Cross-phase Modulation be π；If first signal light Corresponding OOK code systems are 0, then the pumping obtained after the first and second non-linear optical waveguides carry out Cross-phase Modulation Total phase pushing figure of light is 0；

Second coupler, for after second signal light, phase-modulation after polarization the first signal light and pumping Light is coupled；

The third non-linear optical waveguide, the intersection for realizing waveguide by first signal light and second signal light Phase-modulation effect, if the corresponding OOK code systems of first signal light are 1, the corresponding OOK code systems of the second signal light are 0, The phase pushing figure that the pump light is then obtained according to cross-phase modulation effect is π；If the corresponding OOK of first signal light Code system is 0, and the corresponding OOK code systems of the second signal light are 1, then obtain the pump light according to cross-phase modulation effect Phase pushing figure isIf the corresponding OOK code systems of first signal light are 1, the corresponding OOK code systems of the second signal light are 1, then the phase pushing figure that the pump light is obtained according to cross-phase modulation effect isIf first signal light corresponds to OOK code systems be 0, the corresponding OOK code systems of the second signal light are 0, then obtain the pump according to cross-phase modulation effect The phase pushing figure of Pu light is 0；

In conjunction with first aspect above-mentioned, the first to the second of first aspect and the 6th kind of possible realization method, In 7th kind of possible realization method of one side, first non-linear optical waveguide is silicon waveguide or silicon nanowires；Described Two non-linear optical waveguides are silicon waveguide or silicon nanowires；The third non-linear optical waveguide is silicon waveguide or silicon nanowires.

Second aspect, the embodiment provides a kind of code conversion method based on nonlinear optical effect, code Code converter sends out the first signal light of pump light and N groups, and N is the integer more than 0；Adjust the polarization state of the pump light and described The polarization state of the first signal light of N groups, so that the polarization state of the pump light and the polarization state of first signal light of N groups meet Scheduled relationship；By by polarization adjust after pump light and the first signal light of N groups it is coupled after carry out Cross-phase Modulation, with So that the phase of the pump light changes phase pushing figure due to by cross-phase modulation effect, so by the pump light by OOK code systems are converted to PSK code systems；Pump light after first signal light of N groups and Cross-phase Modulation is filtered, so that The pump light is filtered off the optical information for obtaining phase-modulation code PSK, described when being filtered is the pump by wavelength The wavelength of Pu light.

In the first possible realization method of second aspect, in the pump light and N by after polarization adjusts After the first signal light of group is coupled, further include：

To the pump light and the first signal light of N groups progress radix-minus-one complement after coupling；

By the pump light and the first signal light of N groups progress Cross-phase Modulation after radix-minus-one complement, so that the phase of the pump light Position changes phase pushing figure due to by cross-phase modulation effect, and then the pump light is converted to PSK codes by OOK code systems System.

In conjunction with the possible realization method of the first of second aspect above-mentioned and second aspect, the second of second aspect In the possible realization method of kind, after the code pattern converter sends out the first signal light of pump light and N groups, further include：

The code pattern converter sends out M group second signal light, and M is the integer more than 0；

The polarization state of the M groups second signal light is adjusted, so that the polarization state of the pump light and the M groups second letter The polarization state of number light meets scheduled relationship；

By the M group second signals light after polarization, the pump light after Cross-phase Modulation and the first signal light of N groups it is coupled after Cross-phase Modulation is carried out again, so that the phase of the pump light changes phase again due to by cross-phase modulation effect Position offset, and then the pump light is converted into PSK code systems by OOK code systems.

In conjunction with second of possible realization method of second aspect, in the third possible realization method of second aspect In, the wavelength of first signal light of N groups is different, and the wavelength of the M groups second signal light is different；The pump light It is different with the wavelength of first signal light of N groups, the mutual not phase of the wavelength of the pump light and the M groups second signal light Together.

In conjunction with the first to second possible realization method of aforementioned second aspect and second aspect, in second aspect It is described that the pump light is converted into PSK code systems by OOK code systems in 4th kind of possible realization method, including：

It is (000) by OOK code systems_J, (010)_J, (001)_J... ..., (111)_JPump light be converted to PSK code systems be 0, Pump light, J=N+M.

The embodiment of the present invention provides a kind of code conversion method and code pattern converter based on nonlinear effect, to signal Light and pump light realize that amplitude modulation code OOK is arrived after polarization and coupling, using the Cross-phase Modulation of silicon waveguide/silicon nanowires The conversion of phase-modulation code PSK can improve the original code system conversion reaction time from ns ranks compared to existing SOA technologies To ps ranksIn addition, relative to SOA technologies, the component used in the present invention program can be more preferable And ready-made CMOS technology it is integrated, substantially reduce production cost, while the parallel-serial conversion of multiple signals light may be implemented.

Description of the drawings

In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with Obtain other attached drawings according to these attached drawings.

Fig. 1 is the DPSK code system principle schematics that the prior art provides；

Fig. 2 is the QPSK code system principle schematics that the prior art provides；

Fig. 3 is the hardware architecture diagram one of code pattern converter provided in an embodiment of the present invention；

Fig. 4 is the hardware architecture diagram two of code pattern converter provided in an embodiment of the present invention；

Fig. 5 is the hardware architecture diagram three of code pattern converter provided in an embodiment of the present invention；

Fig. 6 is the hardware architecture diagram four of code pattern converter provided in an embodiment of the present invention；

Fig. 7 is the hardware architecture diagram five of code pattern converter provided in an embodiment of the present invention；

Fig. 8 is the hardware architecture diagram six of code pattern converter provided in an embodiment of the present invention；

Fig. 9 is the hardware architecture diagram seven of code pattern converter provided in an embodiment of the present invention.

Specific implementation mode

Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.

Amplitude modulation code (On-Off Keying, the OOK) code modulation mode mentioned in the embodiment of the present invention is communication Most basic modulation format in system, it is realized by the intensity of modulated optical carrier, and amplitude signal-based just represents “1”“0”.OOK pattern modulating and demodulating signals are simple in structure, have a more perfect development, OOK patterns include non-return-to-zero (NRZ, ) and zero two kinds of (RZ, retum-to-zero) Non-retum-to-zero.

The phase shift keying codes (phase shift keying, PSK) mentioned in the embodiment of the present invention are carried with phase The pattern of information represents " 1 " " 0 " based on different phases, its signal power is evenly distributed between each code system, communication Fixed intensity is maintained in the process, thus the distorted signals ingredient caused by intersymbol interference greatly reduces；Under the same conditions, PSK peak value ratios OOK is low, so PSK is to dispersion, the tolerance of nonlinear effect is more preferable, and strong antijamming capability is more suitable for high speed Transmission.Common PSK codes have two kinds of differential phase keying (DPSK) DPSK and quadriphase PSK QPSK.As depicted in figs. 1 and 2, the two It is not both to be DPSK code systems with the change of 0, π phases to represent " 0 ", and " 1 ".QPSK code systems can occur four phases such as 0, π、 To represent " 00 " " 01 " " 10 " " 11 ".

Based on above-mentioned characteristic, generally transmitting terminal and receiving terminal conveniently use low speed amplitude modulation code, and transmission and High-speed phase modulation code is used when exchange.This just needs to carry out different pumped FIR laser conversions.Boyraz, 0., et al., All Optical switching and continuum generation in silicon waveguides.Opt.Express, 2004.12(17)：P.4094-4102. it is to solve that reported in literature UCLA, which observed the cross-phase modulation effect in silicon waveguide, Above-mentioned code system conversion provides possibility, and the embodiment of the present invention is based on the Cross-phase Modulation in silicon waveguide/silicon nanowires XPM effects (also known as nonlinear optical effect effect) realize the conversion of amplitude code OOK to phase code PSK.

It should be noted that the first signal light to n-signal light etc. is intended merely to for distinguishing not in the embodiment of the present invention Same signal light does not constitute signal light itself restriction.

Embodiment one

The embodiment of the present invention provides a kind of code pattern converter, as shown in figure 3, the code pattern converter includes N groups first Signal light generating apparatus 301 pumps light generating apparatus 302, and N+1 Polarization Controller 303, the first coupler 304, first is non-thread Property optical waveguide 305 and filter 306, N is the integer more than 0, wherein

The first signal of N groups light generating apparatus 301 and pump light generating apparatus 302 output end respectively with corresponding institute The input terminal one-to-one correspondence for stating N+1 Polarization Controller 303 is connected；The output end of the N+1 Polarization Controller 303 with it is described The input terminal of first coupler 304 is connected；The input terminal of first non-linear optical waveguide 305 and first coupler 304 The first output end be connected, the output end of first non-linear optical waveguide 305 is connected with the input terminal of the filter 306；

Wherein, the first signal of N groups light generating apparatus 301, the amplitude modulation code OOK signals for generating different light intensity Light；

The pumping light generating apparatus 302, for generating pump light, the pump light is continuous light or light-pulse generator；

The N+1 Polarization Controller 303, polarization state and the OOK signal lights for adjusting the pump light it is inclined Polarization state, so that meeting scheduled relationship between the polarization state of the pump light and the polarization state of the OOK signal lights；

First coupler 304, for adjustment polarization state after the OOK signal lights and pump light couple；

First non-linear optical waveguide 305, the intersection phase for realizing waveguide by the OOK signal lights after coupling Position mudulation effect, to change the phase pushing figure of the pump light after adjusting polarization state, first non-linear optical waveguide 305 Sectional area be um²Magnitude；

The filter 306 is the wavelength of pump light by wavelength, for filtering out the pumping after changing phase pushing figure Light, the filter are made of micro-loop or Bragg grating.

Further, as shown in figure 4, the code pattern converter further includes inverter 307 and the second non-linear optical waveguide 308,

The input terminal of the inverter 307 is connected with the output end of first coupler 304；Second nonlinear optical The input terminal of waveguide 308 is connected with the output end of the inverter 307；The output end of first non-linear optical waveguide 305 and The output end of second non-linear optical waveguide 308 is connected with the input terminal of the filter 306 respectively；

Wherein, the inverter 307 is inverted for the light code to pump light and OOK signal lights after coupling, so that It obtains the signal light that OOK code systems are 1 and is converted to the signal light that OOK code systems are 0, the signal light that OOK code systems are 0 is converted to OOK code systems For 1 signal light；

Second non-linear optical waveguide 308, the intersection phase for realizing waveguide by the OOK signal lights after radix-minus-one complement Position mudulation effect, to change the phase pushing figure of the pump light after adjusting polarization state, second non-linear optical waveguide 308 Sectional area be um²Magnitude.

Further, as shown in figure 5, the code pattern converter further include M group second signals light generating apparatus 309, M partially Shake controller 310, the second coupler 311 and third non-linear optical waveguide 312, and M is the integer more than 0,

First output end of first coupler 304 is connected with the input terminal of first non-linear optical waveguide 305, institute The second output terminal for stating the first coupler 304 is connected with the input terminal of the inverter 307；The output end of the inverter 307 It is connected with the input terminal of second non-linear optical waveguide 308；The output end of the M groups second signal light generating apparatus 309 with The input terminal of the M Polarization Controller 310 is connected；It is the output end of first non-linear optical waveguide 305, described second non-thread The input of the output end of property optical waveguide 308 and the output end and second coupler 311 of the M Polarization Controller 310 End is connected；The input terminal of third non-linear optical waveguide 312 is connected with the output end of second coupler 311；The third is non- The output end of linear light waveguide 312 is connected with the input terminal of the filter 306；

Wherein, the M groups second signal light generating apparatus 309, the amplitude modulation code OOK signals for generating different light intensity Light；

The M Polarization Controller 310, the polarization of polarization state and the OOK signal lights for adjusting the pump light State, so that meeting scheduled relationship between the polarization state of the pump light and the polarization state of the OOK signal lights；

Second coupler 311, the OOK signal lights for being generated to the M groups second signal light generating apparatus carry out Coupling；

The third non-linear optical waveguide 312, the cross-phase tune for realizing waveguide by the OOK signal lights after coupling Effect processed, to change the phase pushing figure of the pump light after adjusting polarization state, the third non-linear optical waveguide 312 is cut Area is um²Magnitude.

Further, first non-linear optical waveguide can be silicon waveguide or silicon nanowires；Second nonlinear optical Waveguide can be silicon waveguide or silicon nanowires；The third non-linear optical waveguide can be silicon waveguide or silicon nanowires.

Based on above-mentioned code pattern converter, the present embodiment also provides a kind of code conversion method based on nonlinear effect.

Specifically, refering to what is shown in Fig. 3, the first signal light generating apparatus 301 of code pattern converter sends out the first signal of N groups Light, pumping light generating apparatus 302 send out pump light；Polarization Controller 303 adjusts polarization state and the institute of first signal light of N groups The polarization state of pump light is stated, is made a reservation for so that the polarization state of the pump light and the polarization state of first signal light of N groups meet Relationship；By by polarization adjust after pump light and the first signal light of N groups it is coupled after in the first silicon waveguide/silicon nanowires Cross-phase Modulation is carried out in 305, so that the phase of the pump light changes phase due to by cross-phase modulation effect Offset；Filter 306 is filtered the pump light after first signal light of N groups and Cross-phase Modulation, so that institute It states pump light and is filtered off the optical information for obtaining phase-modulation code PSK, the filter 306 is the wave of pump light by wavelength It is long.

Wherein, the wavelength of first signal light of N groups is different, and the pump light and first signal light of N groups Wavelength it is different.

In addition, the polarization state for adjusting separately the first signal light of N groups and pump light so that the polarization state of pump light and The polarization state of the first signal light of N groups meets scheduled relationship specifically, adjustment the first signal light of N groups and the corresponding polarization of pump light Controller, when the polarization state of pump light is identical with the polarization state of the first signal light of N groups (when in the same direction), at this point, N The best results of cross-phase modulation effect occur in the first silicon waveguide/silicon nanowires 305 for the first signal light of group and pump light； When the polarization state of pump light and the polarization state of N group signal lights are in rational threshold range, it also can get and preferably hand over relatively Pitch phase-modulation effect effect.

The embodiment of the present invention two and embodiment three are provided respectively when N group signal lights are respectively N=1 and N=2, utilize silicon The Cross-phase Modulation of waveguide/silicon nanowires realizes the conversion of amplitude modulation code OOK to phase-modulation code Q (D) PSK, therefore herein It repeats no more.

Further, code conversion method provided in an embodiment of the present invention can be extended, the number of the signal light It is the arbitrary integer J in 1 to N, wherein the first signal light of J groups and pump light that the first signal of J groups light generating apparatus 301 is sent out The pump light that generating means 302 is sent out adjusts separately first signal light of J groups by corresponding J+1 Polarization Controller 303 And the polarization state of pump light, so that the polarization state of the pump light and the polarization state of the M groups signal light meet scheduled pass System；As shown in table 1, the first signal light of J groups after Polarization Controller adjusts and pump light enter the first silicon after overcoupling Cross-phase Modulation occurs in waveguide/silicon nanowires 305, so that the phase of the pump light by Cross-phase Modulation because being imitated It answers and changes phase pushing figure, so that the pump light is by OOK code systems (000)_J, (010)_J, (001)_J... ..., (111)_J It converts to PSK code systems 0, For example, pumping light generating apparatus 302 is sent out Pump light, the first signal light of J groups that the first signal of J groups light generating apparatus 301 is sent out, and J=3, at this time 3 group of first signal light OOK code systems have 8 kinds of situations, are 000,010,011,100,101,010,110,111 respectively, using can after above-mentioned pattern converter So that the pump light is converted by OOK code systems to PSK code systems, i.e., corresponding 0, And then realize width Spend the conversion of modulation code and corresponding phase-modulation code.

Table 1

So far, due to XPM effects, the phase of pump light is adjusted pump light filter 306 to λ p by signal light modulation It filters out and, so that the signal light of output is free of amplitude modulation information, the only information of position phase change, thereby realize OOK and arrive The conversion of PSK codes.Meanwhile in the process, while serioparallel exchange of the low speed optical signal to high-speed optical signal is realized.

The embodiment of the present invention provides a kind of code pattern converter, by multigroup signal light and pump light carry out polarization and Coupling, and then realize amplitude modulation code OOK to phase-modulation code PSK's using the Cross-phase Modulation of silicon waveguide/silicon nanowires Conversion can improve the original code system conversion reaction time to ps ranks from ns ranks compared to existing SOA technologies, separately Outside, relative to SOA technologies, the component that is used in the present invention program can preferably and ready-made CMOS technology is integrated drop significantly Low production cost, while the parallel-serial conversion of multiple signals light may be implemented.

Embodiment two

The embodiment of the present invention provides a kind of code pattern converter, as shown in fig. 6, as N=1, the code pattern converter packet The first signal light generating apparatus 401 is included, light generating apparatus 402, the first Polarization Controller 403 and the second Polarization Controller are pumped 404, the first coupler 405, the first non-linear optical waveguide 406 and filter 407, wherein

The output end of the first signal light generating apparatus 401 is connected with the input terminal of first Polarization Controller 403, The output end of the pumping light generating apparatus 402 is connected with the input terminal of second Polarization Controller 404；

The output end of first Polarization Controller, 403 and second Polarization Controller 404 and first coupler 405 Input terminal be connected；

The input terminal of first non-linear optical waveguide 406 is connected with the first output end of first coupler 405, institute The output end for stating the first silicon waveguide or silicon nanowires 406 is connected with the input terminal of the filter 407.

Specifically, as N=1, first signal light of N groups is the first signal light, at this point, the installation drawing of Fig. 6 is can refer to, The pump light and pass through respectively that the first signal light and pumping light generating apparatus 402 that first signal light generating apparatus 401 is sent out are sent out Cross the polarization state that Polarization Controller 403 and 404 adjusts first signal light and pump light；By Polarization Controller 403 and 404 Enter in the first non-linear optical waveguide 406 after the first signal light and pump light after adjustment are coupled and Cross-phase Modulation occur, Wherein, as shown in table 2, if the corresponding OOK code systems of first signal light are 1, institute is obtained according to cross-phase modulation effect The phase pushing figure for stating pump light is π；If the corresponding OOK code systems of first signal light are 0, imitated according to Cross-phase Modulation The phase pushing figure that the pump light should be obtained is 0.The code pattern converter to after Cross-phase Modulation the pump light and First signal light is filtered, and is filtered out phase pushing figure and is the pump light of π or 0, and then obtains phase shift keying codes DPSK code systems Signal light.

Table 2

The OOK code systems of first signal light	0	1
			The phase pushing figure of pump light after progress Cross-phase Modulation	0	π
DPSK code systems after Cross-phase Modulation	0	π

Further, as shown in fig. 7, for as N=1, at this point, the code pattern converter can also include the first signal light Generating means 501 pumps light generating apparatus 502, the first Polarization Controller 503 and the second Polarization Controller 504, the first coupler 505, the first non-linear optical waveguide 506 and filter 507, inverter 508 and the second non-linear optical waveguide 509, wherein

The output end of the first signal light generating apparatus 501 is connected with the input terminal of first Polarization Controller 503, The output end of the pumping light generating apparatus 502 is connected with the input terminal of second Polarization Controller 504；

The output end of first Polarization Controller, 503 and second Polarization Controller 504 and first coupler 505 Input terminal be connected；

First output end of first coupler 505 is connected with first non-linear optical waveguide 506, first coupling The second output terminal of clutch 505 is connected with the input terminal of the inverter 508；

The input terminal of second non-linear optical waveguide 509 is connected with the output end of the inverter 508；

The output end of first non-linear optical waveguide, 506 and second non-linear optical waveguide 509 and the filter 507 Input terminal be connected.

Based on a kind of above-mentioned code pattern converter based on nonlinear optical effect, the present embodiment also provides a kind of based on non- The code conversion method of linear effect.

Specifically, as N=1, the N groups signal light is the first signal light, at this point, the installation drawing of Fig. 7 is can refer to, first The pump light that the first signal light and pumping light generating apparatus 502 that signal light generating apparatus 501 is sent out are sent out is respectively by polarization Controller 503 and 504 adjusts the polarization state of first signal light and pump light；The first letter after Polarization Controller adjusts Number light and pump light are respectively enterd after partial wave couples 508 in the first non-linear optical waveguide 506 and inverter, so that into The first signal light and pump light of one non-linear optical waveguide 506 carry out Cross-phase Modulation, while making after pattern inverts The first signal light and pump light enter the second non-linear optical waveguide 508 in carry out Cross-phase Modulation；Wherein, as shown in table 3, If the corresponding OOK code systems of first signal light are 1, enter in the first non-linear optical waveguide 506 and carry out Cross-phase Modulation The phase pushing figure for obtaining the pump light afterwards isInto after carrying out Cross-phase Modulation in the second non-linear optical waveguide 508 The phase pushing figure for obtaining the pump light isPass through the first and second non-linear optical waveguides and carries out Cross-phase Modulation Total phase pushing figure of the pump light obtained afterwards is π；If the corresponding OOK code systems of first signal light are 0, by the One and second non-linear optical waveguide to carry out the total phase pushing figure of the pump light obtained after Cross-phase Modulation be 0.At this point, Code pattern converter to after Cross-phase Modulation the pump light and the first signal light be filtered, filtering out total phase pushing figure is The pump light of π or 0, and then obtain the signal light of phase shift keying codes DPSK code systems.

Table 3

Embodiment three

The embodiment of the present invention provides a kind of code pattern converter, as shown in figure 8, as N=2, the code pattern converter packet The first signal light generating apparatus 601 is included, second signal light generating apparatus 602 pumps light generating apparatus 603, the first Polarization Control Device 604, the second Polarization Controller 605, third Polarization Controller 606, the first coupler 607, the first non-linear optical waveguide 608 with And filter 609, wherein

The output end of the first signal light generating apparatus 601 is connected with the input terminal of first Polarization Controller 604, The output end of the second signal light generating apparatus 602 is connected with the input terminal of second Polarization Controller 605, the pumping The output end of light generating apparatus 603 is connected with the input terminal of the third Polarization Controller 606；

The output end of first Polarization Controller 604, the second Polarization Controller 605 and third Polarization Controller 606 It is connected with the input terminal of first coupler 607；

The input terminal of first non-linear optical waveguide 608 is connected with the first output end of first coupler 607, institute The output end for stating the first silicon waveguide or silicon nanowires 608 is connected with the input terminal of the filter 609.

Specifically, as N=2, the N groups signal light is respectively the first signal light and second signal light, at this point, can refer to The installation drawing of Fig. 8, the first signal light that the first signal light generating apparatus 601 is sent out, second signal light generating apparatus 602 are sent out The pump light and pass through the tune of Polarization Controller 604,605 and 606 respectively that second signal light and pumping light generating apparatus 603 are sent out The polarization state of whole first signal light, second signal light and pump light；The first signal after Polarization Controller adjusts Light, second signal light and pump light it is coupled after enter the first non-linear optical waveguide 607 in Cross-phase Modulation occurs, In, as shown in table 4, if the corresponding OOK code systems of first signal light are 1, the corresponding OOK code systems of the second signal light are 0, The phase pushing figure that the pump light is then obtained according to cross-phase modulation effect is π；If the corresponding OOK of first signal light Code system is 0, and the corresponding OOK code systems of the second signal light are 1, then obtain the pump light according to cross-phase modulation effect Phase pushing figure isIf the corresponding OOK code systems of first signal light are 1, the corresponding OOK code systems of the second signal light are 1, then the phase pushing figure that the pump light is obtained according to cross-phase modulation effect isIf first signal light corresponds to OOK code systems be 0, the corresponding OOK code systems of the second signal light are 0, then obtain the pump according to cross-phase modulation effect The phase pushing figure of Pu light is 0.At this point, code pattern converter to after Cross-phase Modulation the pump light, the first signal light with And second signal light is filtered, filter out phase pushing figure be π, Or 0 pump light, and then obtain phase shift keying codes The signal light of QPSK code systems.

Table 4

Further, as shown in figure 9, working as N=1, when M=1, the code pattern converter can also include that the first signal light is sent out Generating apparatus 701, second signal light generating apparatus 702 pump light generating apparatus 703, the first Polarization Controller 704, the second polarization Controller 705, third Polarization Controller 706, the first coupler 707, the second coupler 713, the first non-linear optical waveguide 708, Filter 709, inverter 710, the second non-linear optical waveguide 711 and third non-linear optical waveguide 712 wherein,

The output end of the first signal light generating apparatus 701 is connected with the input terminal of first Polarization Controller 704, The output end that the second signal light fills 702 is connected with the input terminal of second Polarization Controller 705, the pump light The output end of generating means 703 is connected with the input terminal of the third Polarization Controller 706；

The output end of first Polarization Controller 704 and third Polarization Controller 706 and first coupler 707 Input terminal is connected；

First output end of first coupler 707 is connected with the input terminal of first non-linear optical waveguide 708, institute The second output terminal for stating the first coupler 707 is connected with the input terminal of the inverter 710；

The output end of the inverter 710 is connected with the input terminal of second non-linear optical waveguide 711；

First non-linear optical waveguide 708, the second non-linear optical waveguide 711 and second Polarization Controller 705 Output end be connected with the input terminal of second coupler 713；

The output end of second coupler 713 is connected with the input terminal of the third non-linear optical waveguide 712, and described The output end of three non-linear optical waveguides 712 is connected with the input terminal of the filter 709.

Specifically, work as N=1, when M=1, can refer to the installation drawing of Fig. 9, the first signal light generating apparatus 701 send out The pumping that the second signal light and pumping light generating apparatus 703 that one signal light, second signal light generating apparatus 702 are sent out are sent out Light and passes through Polarization Controller 704,705 and 706 respectively and adjust the inclined of first signal light, second signal light and pump light Polarization state；The first signal light and pump light after Polarization Controller adjusts respectively enter the first nonlinear optical after partial wave couples In waveguide 708 and inverter 710, so that the first signal light and pump light into the first non-linear optical waveguide 708 are handed over Phase-modulation is pitched, while the first signal light after pattern inverts and pump light being made to enter the second non-linear optical waveguide 711 Middle carry out Cross-phase Modulation；Wherein, as shown in table 5, if the corresponding OOK code systems of first signal light are 1, enter first Carry out obtaining the phase pushing figure of the pump light after Cross-phase Modulation in non-linear optical waveguide 708 beIt is non-into second Carry out obtaining the phase pushing figure of the pump light after Cross-phase Modulation in linear light waveguide 711 bePass through the first He Total phase pushing figure that second non-linear optical waveguide carries out the pump light obtained after Cross-phase Modulation is π；If described The corresponding OOK code systems of one signal light are 0, then are obtained after the first and second non-linear optical waveguides carry out Cross-phase Modulation Total phase pushing figure of the pump light is 0；Second signal light after Polarization Controller adjusts, by the first nonlinear optical The first signal light and pump light of waveguide and the second non-linear optical waveguide enter the after the second coupler 713 is coupled Cross-phase Modulation is carried out again in three non-linear optical waveguides 712, wherein if the corresponding OOK code systems of first signal light are 1, the corresponding OOK code systems of the second signal light are 0, then the phase that the pump light is obtained according to cross-phase modulation effect is inclined Shifting amount is π；If the corresponding OOK code systems of first signal light are 0, the corresponding OOK code systems of the second signal light are 1, then root The phase pushing figure that the pump light is obtained according to cross-phase modulation effect isIf the corresponding OOK codes of first signal light It is made as 1, the corresponding OOK code systems of the second signal light are 1, then the phase of the pump light is obtained according to cross-phase modulation effect Position offset beIf the corresponding OOK code systems of first signal light are 0, the corresponding OOK code systems of the second signal light are 0, then the phase pushing figure that the pump light is obtained according to cross-phase modulation effect is 0.At this point, code pattern converter is to intersecting phase The modulated pump light in position, the first signal light and second signal light are filtered, filter out phase pushing figure be π, Or 0 pump light, and then obtain the signal light of phase shift keying codes QPSK code systems.

Table 5

So far, the embodiment of the present invention provide code pattern converter, by multigroup signal light and pump light polarized with And coupling, and then realize turning for amplitude modulation code OOK to phase-modulation code PSK using the Cross-phase Modulation of non-linear optical waveguide It changes, the original code system conversion reaction time can be improved from ns ranks to ps ranks compared to existing SOA technologies, in addition, Relative to SOA technologies, the component used in the present invention program can be integrated preferably with ready-made CMOS technology, substantially reduce life Cost is produced, while the parallel-serial conversion of multiple signals light may be implemented.

It is apparent to those skilled in the art that for convenience and simplicity of description, only with above-mentioned each function The division progress of module, can be as needed and by above-mentioned function distribution by different function moulds for example, in practical application Block is completed, i.e., the internal structure of device is divided into different function modules, to complete all or part of work(described above Energy.The specific work process of the system, apparatus, and unit of foregoing description can refer to corresponding in preceding method embodiment Journey, details are not described herein.

In several embodiments provided herein, it should be understood that disclosed system, device and method can be with It realizes by another way.For example, the apparatus embodiments described above are merely exemplary, for example, the module or The division of unit, only a kind of division of logic function, formula that in actual implementation, there may be another division manner, such as multiple units Or component can be combined or can be integrated into another system, or some features can be ignored or not executed.Another point, institute Display or the mutual coupling, direct-coupling or communication connection discussed can be by some interfaces, device or unit INDIRECT COUPLING or communication connection can be electrical, machinery or other forms.

The unit illustrated as separating component may or may not be physically separated, aobvious as unit The component shown may or may not be physical unit, you can be located at a place, or may be distributed over multiple In network element.Some or all of unit therein can be selected according to the actual needs to realize the mesh of this embodiment scheme 's.

In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, it can also It is that each unit physically exists alone, it can also be during two or more units be integrated in one unit.Above-mentioned integrated list The form that hardware had both may be used in member is realized, can also be realized in the form of SFU software functional unit.

If the integrated unit is realized in the form of SFU software functional unit and sells or use as independent product When, it can be stored in a computer read/write memory medium.Based on this understanding, technical scheme of the present invention is substantially The all or part of the part that contributes to existing technology or the technical solution can be in the form of software products in other words It embodies, which is stored in a storage medium, including some instructions are used so that a computer It is each that equipment (can be personal computer, server or the network equipment etc.) or processor (processor) execute the present invention The all or part of step of embodiment the method.And storage medium above-mentioned includes：USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disc or CD Etc. the various media that can store program code.

The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.

Claims

1. a kind of code pattern converter, which is characterized in that the code pattern converter includes N groups the first signal light generating apparatus, pumping Light generating apparatus, N+1 Polarization Controller, the first coupler, the first non-linear optical waveguide, inverter, the second non-linear light wave It leads and filter, N is the integer more than 0,

The pumping light generating apparatus and the first signal of N groups light generating apparatus respectively with the N+1 Polarization Controller one One correspondence is connected；The N+1 Polarization Controller is connected with first coupler；First coupler and described first Non-linear optical waveguide is connected, and first non-linear optical waveguide is connected with the filter, the inverter and first coupling Clutch is connected；Second non-linear optical waveguide is connected with the inverter；First non-linear optical waveguide and described second Non-linear optical waveguide is connected with the filter respectively；

The pumping light generating apparatus, for generating pump light；

The N+1 Polarization Controller, the polarization state of polarization state and the OOK signal lights for adjusting the pump light, with So that meeting scheduled relationship between the polarization state of the pump light and the polarization state of the OOK signal lights；

First non-linear optical waveguide, the Cross-phase Modulation for realizing waveguide by the OOK signal lights after coupling Effect, to change the phase pushing figure of the pump light after adjusting polarization state, the sectional area of first non-linear optical waveguide For um²Magnitude；

The filter, for filtering out the pump light after changing phase pushing figure；

The inverter is inverted for the light code to pump light and OOK signal lights after coupling, so that OOK code systems are 1 Signal light be converted to the signal light that OOK code systems are 0, the signal light that OOK code systems are 0 is converted to the signal light that OOK code systems are 1；

Second non-linear optical waveguide, the Cross-phase Modulation for realizing waveguide by the OOK signal lights after radix-minus-one complement Effect, to change the phase pushing figure of the pump light after adjusting polarization state, the sectional area of second non-linear optical waveguide For um²Magnitude.

2. code pattern converter according to claim 1, which is characterized in that the code pattern converter further includes that M groups second are believed Number light generating apparatus, M Polarization Controller, the second coupler and third non-linear optical waveguide, M are the integer more than 0,

The M groups second signal light generating apparatus is connected with M Polarization Controller one-to-one correspondence respectively；The M polarization Controller is connected with second coupler；Second coupler, first non-linear optical waveguide and described second Non-linear optical waveguide is connected with the third non-linear optical waveguide；The third non-linear optical waveguide and the filter phase Even；

The M Polarization Controller, the polarization state of polarization state and the OOK signal lights for adjusting the pump light, so that The pump light polarization state and the polarization state of the OOK signal lights between meet scheduled relationship；

Second coupler, the OOK signal lights for being generated to the M groups second signal light generating apparatus couple；

The third non-linear optical waveguide, the cross-phase modulation effect for realizing waveguide by the OOK signal lights after coupling, To change the phase pushing figure of the pump light after adjusting polarization state, the sectional area of the third non-linear optical waveguide is um² Magnitude.

3. code pattern converter according to claim 1, which is characterized in that as N=1, first signal light of N groups occurs Device is the first signal light generating apparatus, and the N+1 Polarization Controller is respectively the first Polarization Controller and the second polarization control Device processed,

The first signal light generating apparatus is connected with first Polarization Controller, the pumping light generating apparatus and described the Two Polarization Controllers are connected；First Polarization Controller and second Polarization Controller with the first coupler phase Even；

Wherein, the first signal light generating apparatus is 0 for generating the first signal light that OOK code systems are 1 or OOK code systems The first signal light；

First Polarization Controller and the second Polarization Controller, the polarization state for adjusting the pump light and first letter The polarization state of number light, so that meeting scheduled pass between the polarization state of the pump light and the polarization state of the OOK signal lights System；

First non-linear optical waveguide, the intersection phase for realizing waveguide by adjusting first signal light after polarization state Position mudulation effect changes the pump light after adjustment polarization state if the corresponding OOK code systems of first signal light are 1 Phase pushing figure is π；If the corresponding OOK code systems of first signal light are 0, change the pump light after adjustment polarization state Phase pushing figure be 0；

The filter is the pump light of π or 0 for filtering out phase pushing figure, and then obtains phase shift keying codes DPSK code systems Signal light.

4. code pattern converter according to claim 1, which is characterized in that as N=1, first signal light of N groups occurs Device is the first signal light generating apparatus, and the N+1 Polarization Controller is respectively the first Polarization Controller and the second polarization control Device processed, wherein

The first signal light generating apparatus is connected with first Polarization Controller, the pumping light generating apparatus and described the Two Polarization Controllers are connected；First Polarization Controller and second Polarization Controller with the first coupler phase Even；First coupler is connected with first non-linear optical waveguide and the inverter respectively；

First Polarization Controller and the second Polarization Controller, the polarization state for adjusting the pump light and first letter The polarization state of number light, so that meeting scheduled pass between the polarization state of the pump light and the polarization state of first signal light System；

First non-linear optical waveguide and the second non-linear optical waveguide, the friendship for realizing waveguide by first signal light Phase-modulation effect is pitched, if the corresponding OOK code systems of first signal light are 1, by being carried out in the first non-linear optical waveguide The phase pushing figure that the pump light is obtained after Cross-phase Modulation isBy carrying out intersection phase in the second non-linear optical waveguide Obtaining the phase pushing figure of the pump light after the modulation of position isPass through the first non-linear optical waveguide and the second nonlinear optical Total phase pushing figure that waveguide carries out the pump light obtained after Cross-phase Modulation is π；If first signal light corresponds to OOK code systems be 0, then the pump light obtained after the first and second non-linear optical waveguides carry out Cross-phase Modulation Total phase pushing figure is 0；

5. code pattern converter according to claim 1, which is characterized in that as N=2, first signal light of N groups occurs Device is respectively the first signal light generating apparatus and second signal light generating apparatus, and the N+1 Polarization Controller is respectively One Polarization Controller, the second Polarization Controller and third Polarization Controller, wherein

The first signal light generating apparatus is connected with first Polarization Controller, the second signal light generating apparatus and institute It states the second Polarization Controller to be connected, the pumping light generating apparatus is connected with the third Polarization Controller；First polarization Controller, the second Polarization Controller and third Polarization Controller are connected with first coupler；

Wherein, the first signal light generating apparatus is 0 for generating the first signal light that OOK code systems are 1 or OOK code systems The first signal light, the second signal light generating apparatus, for generate OOK code systems be 1 second signal light or OOK code systems For 0 second signal light；

First Polarization Controller, the second Polarization Controller and third Polarization Controller are respectively used to adjust first letter Polarization state, the polarization state of the second signal light and the polarization state of the pump light of number light, so that the pump light Meet scheduled relationship between polarization state and the polarization state of first signal light, and the polarization state of the pump light and described the Meet scheduled relationship between the polarization state of binary signal light；

First non-linear optical waveguide, the cross-phase for realizing waveguide by first signal light and second signal light Mudulation effect, if the corresponding OOK code systems of first signal light are 1, the corresponding OOK code systems of the second signal light are 0, then root The phase pushing figure that the pump light is obtained according to cross-phase modulation effect is π；If the corresponding OOK code systems of first signal light It is 0, the corresponding OOK code systems of the second signal light are 1, then the phase of the pump light is obtained according to cross-phase modulation effect Offset isIf the corresponding OOK code systems of first signal light are 1, the corresponding OOK code systems of the second signal light are 1, then The phase pushing figure that the pump light is obtained according to cross-phase modulation effect isIf the corresponding OOK of first signal light Code system is 0, and the corresponding OOK code systems of the second signal light are 0, then obtain the pump light according to cross-phase modulation effect Phase pushing figure is 0；

The filter, for filter out phase pushing figure be π,Or 0 pump light, and then obtain phase shift keying codes The signal light of QPSK code systems.

6. code pattern converter according to claim 2, which is characterized in that work as N=1, when M=1, first signal of N groups Light generating apparatus is the first signal light generating apparatus, and the M groups second signal light generating apparatus is second signal light generating apparatus, The N+1 Polarization Controller is respectively the first Polarization Controller and the second Polarization Controller, and the M Polarization Controller is the Three Polarization Controllers, wherein

The first signal light generating apparatus is connected with first Polarization Controller, the second signal light generating apparatus and institute It states the second Polarization Controller to be connected, the pumping light generating apparatus is connected with the third Polarization Controller；First polarization Controller and third Polarization Controller are connected with first coupler；First coupler is non-linear with described first respectively Optical waveguide is connected with the inverter；First non-linear optical waveguide, the second non-linear optical waveguide and the second Polarization Control Device is connected with second coupler；Second coupler is connected with the third non-linear optical waveguide, and the third is non- Linear light waveguide is connected with the filter；

First non-linear optical waveguide and the second non-linear optical waveguide, the friendship for realizing waveguide by first signal light Phase-modulation effect is pitched, if the corresponding OOK code systems of first signal light are 1, enter in the first non-linear optical waveguide and carries out The phase pushing figure that the pump light is obtained after Cross-phase Modulation isInto carrying out intersection phase in the second non-linear optical waveguide Obtaining the phase pushing figure of the pump light after the modulation of position isPass through the first non-linear optical waveguide and the second nonlinear optical Total phase pushing figure that waveguide carries out the pump light obtained after Cross-phase Modulation is π；If first signal light corresponds to OOK code systems be 0, then the pump light obtained after the first and second non-linear optical waveguides carry out Cross-phase Modulation Total phase pushing figure is 0；

Second coupler, for after second signal light, phase-modulation after polarization the first signal light and pump light into Row coupling；

The third non-linear optical waveguide, the cross-phase for realizing waveguide by first signal light and second signal light Mudulation effect, if the corresponding OOK code systems of first signal light are 1, the corresponding OOK code systems of the second signal light are 0, then root The phase pushing figure that the pump light is obtained according to cross-phase modulation effect is π；If the corresponding OOK code systems of first signal light It is 0, the corresponding OOK code systems of the second signal light are 1, then the phase of the pump light is obtained according to cross-phase modulation effect Offset isIf the corresponding OOK code systems of first signal light are 1, the corresponding OOK code systems of the second signal light are 1, then The phase pushing figure that the pump light is obtained according to cross-phase modulation effect isIf the corresponding OOK of first signal light Code system is 0, and the corresponding OOK code systems of the second signal light are 0, then obtain the pump light according to cross-phase modulation effect Phase pushing figure is 0；

7. the code pattern converter according to claim 2 or 6, which is characterized in that

First non-linear optical waveguide is silicon waveguide or silicon nanowires；

Second non-linear optical waveguide is silicon waveguide or silicon nanowires；

The third non-linear optical waveguide is silicon waveguide or silicon nanowires.

8. a kind of code conversion method based on nonlinear effect, which is characterized in that

Code pattern converter sends out the first signal light of pump light and N groups, and N is the integer more than 0；Adjust the polarization state of the pump light And the polarization state of first signal light of N groups, so that the polarization of the polarization state of the pump light and first signal light of N groups State meets scheduled relationship；By by polarization adjust after pump light and the first signal light of N groups it is coupled after carry out cross-phase Modulation, so that the phase of the pump light changes phase pushing figure due to by cross-phase modulation effect, and then will be described Pump light is converted to PSK code systems by OOK code systems；Pump light after first signal light of N groups and Cross-phase Modulation is carried out Filtering, it is described to pass through wavelength when being filtered so that the pump light is filtered off the optical information for obtaining phase-modulation code PSK For the wavelength of the pump light.

9. the code conversion method according to claim 8 based on nonlinear effect, which is characterized in that will pass through described Polarization adjustment after pump light and the first signal light of N groups it is coupled after, further include：

By after radix-minus-one complement pump light and the first signal light of N groups carry out Cross-phase Modulation so that the phase of the pump light because Changed phase pushing figure by cross-phase modulation effect, and then the pump light is converted into PSK code systems by OOK code systems.

10. the code conversion method according to claim 9 based on nonlinear effect, which is characterized in that in the pattern After converter sends out the first signal light of pump light and N groups, further include:

The polarization state of the M groups second signal light is adjusted, so that the polarization state of the pump light and the M groups second signal light Polarization state meet scheduled relationship；

By the M group second signals light after polarization, the pump light after Cross-phase Modulation and the first signal light of N groups it is coupled after again Cross-phase Modulation is carried out, so as to change phase again due to by cross-phase modulation effect inclined for the phase of the pump light Shifting amount, and then the pump light is converted into PSK code systems by OOK code systems.

11. the code conversion method according to claim 10 based on nonlinear effect, which is characterized in that

The wavelength of first signal light of N groups is different, and the wavelength of the M groups second signal light is different；

The wavelength of the pump light and first signal light of N groups is different, the pump light and the M groups second signal light Wavelength it is different.

12. the code conversion method based on nonlinear effect according to any one of claim 8 to 10, feature exist In, it is described that the pump light is converted into PSK code systems by OOK code systems, including：

It is (000) by OOK code systems_J,(010)_J,(001)_J... ..., (111)_JPump light be converted to PSK code systems be 0,Pump light, J=N+M.