CN102305985A - Method and device for all-optical regeneration of high-speed differential quadrature reference phase shift keying (DQPSK) modulation signal - Google Patents
Method and device for all-optical regeneration of high-speed differential quadrature reference phase shift keying (DQPSK) modulation signal Download PDFInfo
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Abstract
The invention discloses a method and a device for all-optical regeneration of a high-speed differential quadrature reference phase shift keying (DQPSK) modulation signal. The method comprises the following steps of: modulating the DQPSK signal; regenerating an on-off-keying (OOK) signal; and recovering the DQPSK signal. An aggravated DQPSK optical signal on a transmission link enters a demodulation unit of the DQPSK signal; the DQPSK signal is demodulated into the OOK signal, and simultaneously phase noises are converted into intensity noises; then an OOK signal regenerator performs amplitude regeneration on the optical signal; and finally, a polarization controller and a polarizer convert the OOK signal into the DQPSK signal to realize the all-optical regeneration of the DQPSK signal. By the method and the device, the all-optical regeneration of the DQPSK signal can be realized, a difficulty in the all-optical regeneration of the DQPSK signal is expected to be overcome, and a probable solution is provided for solving similar problems in high-speed optical signal processing.
Description
Technical field
The present invention relates to high-speed high capacity all-optical network communication technical field, be specifically related to the full optical regeneration method and the device of novel high-speed modulation format.
Background technology
In in recent years, wavelength-division multiplex technique, forward error correction coding, Raman distributed amplifier, novel Transmission Fibers have all greatly improved the capacity and the distance of optical fiber telecommunications system.The modulation format of optical fiber telecommunications system mainly is to adopt traditional on-off keying (On-Off-Keying; OOK); And a series of new modulation formats begin to obtain in optical fiber telecommunications system to pay attention to gradually, and new modulation format has improved signal for chromatic dispersion, light filtering and nonlinear tolerance.These modulation formats have comprised CRZ (Chirped Return toZero), AMI (Alternate Mark Inversion), CSRZ (Carrier Suppressed Return to Zero) and PSK (Phase Shift Keying).And the high-transmission capacity of the single fiber that report is arranged has at present reached 25.6Tb/s.For high transfer rate like this, adopt the OOK modulation signal of traditional RZ or NRZ sign indicating number type to be difficult to realize, can only adopt the multi-system modulation format of the higher phase-magnitude hybrid modulation of spectrum efficiency.Just because of this, in present high-speed light transmission plan, obtain extensive studies like modulation formats such as DQPSK, the ideal that is acknowledged as band optical fiber communication system of future generation is selected.
Meanwhile; Although with respect to traditional OOK modulation format; Phase modulation format has higher tolerance to the nonlinear effect in the transmission; But the linear phase noise of introducing by image intensifer in the high-speed transfer; And, will cause the severe exacerbation of differential phase-shift keying (DPSK) (DPSK), four phase RPSK relative phase shift keying (DQPSK) equiphase modulation signal quality by the nonlinear phase noise that the line nonlinearity effect causes.In order to guarantee signal transfer quality in the following high-speed high capacity optical-fiber network, must regenerate to DPSK, DQPSK signal.Therefore, work out and a kind ofly can realize that the full photo reversal technology to phase modulated signal is the inevitable requirement that adapts to following high-speed light transmission technology development.
At present, to the Study of Regeneration Technique of phase modulated signal, existing in the world suitable report, but major part also mainly concentrates on the regeneration aspect of DPSK signal.Common several schemes have: 1, in highly nonlinear optical fiber, utilize cross-phase modulation or Fiber-optic parametric enlarge-effect to realize amplification again and shaping again to the RZ-DPSK signal; 2, utilize semiconductor optical amplifier (SOA) to combine the Sagnac ring to realize the regenerative amplification of DPSK; 3, convert the phase noise of DPSK into intensity noise through the polarization interference structure; Simultaneously in the data pulse of OOK, remain with phase information; Utilize SOA to come strength signal is realized shaping again, utilize low noise EDFA that the DPSK signal of regeneration is amplified at last again.
And for the Study of Regeneration Technique of DQPSK signal, then rarely seen relevant report.The K. Cvecek of research group of Germany proposes to utilize non-linear amplification ring mirror (NALM) that the DQPSK signal is carried out the amplitude regeneration tests; But this scheme is merely able to the amplitude noise that is caused by ASE is regenerated, and does not have ability that the phase noise that worsens in the DQPSK signal is regenerated.In the regeneration scheme of the Masayuki Matsumoto of research group of Japan through the emulation proposition; At first the DQPSK signal is interfered through time-delay; Convert the OOK signal into; Through the 2R regenerator OOK signal is carried out shaping and amplitude regeneration then; OOK signal after the regeneration interacts the DQPSK signal after finally obtaining regenerating with the time clock of extracting in full optical phase modulator subsequently.
At home, full photo reversal Study on Technology achievement is embodied in the regeneration to the OOK signal mostly, by contrast, then in many colleges and universities and research institution, carries out laterly for the research of phase modulated signal, and is main with theoretical simulation research how.And to the research of DQPSK signal, work concentrates on the aspects such as modulation, transmission, demodulation of signal mostly.
Importantly, be that the phase modulation format of representative is paid close attention in the research of high-speed light transmission technology in a large number at present in the world, and become a kind of research tendency of certainty with DPSK, DQPSK.But the research major part to its regeneration techniques also is limited to the research to DPSK, does not then propose effective solution yet for the regeneration of DQPSK.
Summary of the invention
The present invention seeks to realize the full photo reversal of DQPSK modulation signal,, a kind of full optical regeneration method and device of novel high speed DQPSK modulation signal is provided to solve problems such as the system complex that exists in the current DQPSK signal regeneration method, cost height, poor stability.
The present invention at first provides a kind of full optical reproducing apparatus of high speed DQPSK modulation signal, and this device comprises:
First Polarization Controller: the deterioration DQPSK flashlight that is used for importing on the transmission link is realized the conversion of 45 ° of line polarisations;
Differential group delay line: be used for the DQPSK signal after first Polarization Controller conversion is realized that signal on x axle and two polarization states of y axle has the time-delay of a symbol period;
First photo-coupler: be used for the light signal behind the differential group delay is divided into two-way, the first via is as the real part of DQPSK signal, the second tunnel imaginary part as the DQPSK signal;
The first via comprises: second Polarization Controller, second photo-coupler and first polarization beam apparatus; The real part of first via DQPSK signal makes by second Polarization Controller and produces one+45 ° phase differences between the polarization state of two main shafts; Ellipse polarisation by second latter two quadrature of photo-coupler gets into first polarization beam apparatus again; Ellipse afterwards polarisation becomes quadrature and two complementary line polarisations; Latter two complementary OOK data flow is passed through after the identical distance in ring; Output at first polarization beam apparatus produces polarization interference, and a part of phase noise among the DQPSK is transformed into amplitude noise and is present in the OOK data flow of two complementations at this moment;
The second the tunnel comprises: the 3rd Polarization Controller, the 3rd photo-coupler and second polarization beam apparatus; The imaginary part of the second road DQPSK signal makes by the 3rd Polarization Controller equally and produces-45 ° of phase differences between the polarization state of two main shafts; Ellipse polarisation by the 3rd latter two quadrature of photo-coupler gets into second polarization beam apparatus again; Ellipse afterwards polarisation becomes quadrature and two complementary line polarisations; Latter two complementary OOK data flow is passed through after the identical distance in ring; Output at second polarization beam apparatus can produce polarization interference, and a part of phase noise among the DQPSK is transformed into amplitude noise and is present in the OOK data flow of two complementations at this moment;
Mach moral structure regenerator once: be used to accomplish light intensity regeneration, adjust the time-delay of two paths of signals simultaneously, and two ways of optical signals is interfered and become one road signal the most at last to above-mentioned two paths of data;
Optical band pass filter: be used for the noise that the moral structure regenerator regenerative process light amplification once of filtering Mach is introduced;
The 4th Polarization Controller:
The polarizer: the signal of pairwise orthogonal is become a polarization state to produce the DQPSK signal again;
Erbium-Doped Fiber Amplifier (EDFA):
Described Mach once moral structure regenerator is to have Mach moral structure and have the semiconductor optical amplifier of regeneration function once.
The present invention provides a kind of full optical regeneration method that adopts the above device to realize high speed DQPSK modulation signal simultaneously, and this method realizes through following steps:
1st, through first Polarization Controller (PC1) polarization state of the DQPSK signal that worsens is become 45 ° of linear polarization;
2nd, the DQPSK signal that will go up after the step changes is partially sent into differential group delay line (DGD), makes signal on two polarization states of x axle and y axle that the time-delay of a symbol period arranged;
3rd, and then through first photo-coupler (OC1) output of differential group delay line is divided into identical two-way: the first via is expressed as real part I passage wherein, and following the second the tunnel represent imaginary part Q passage;
The 4th; In first via real part I passage, make between the polarization state of two main shafts and produce one+45 ° phase differential through second Polarization Controller; Ellipse polarisation through latter two quadrature of second photo-coupler (OC2) gets into first polarization beam apparatus (PBS1) again; Ellipse afterwards polarisation becomes quadrature and two complementary line polarisations; Latter two complementary OOK data stream is passed through after the identical distance in ring; Output terminal at first polarization beam apparatus produces polarization interference, and a part of phase noise among the DQPSK is transformed into amplitude noise and is present in the OOK data stream of two complementations at this moment;
The 5th; Equally; In the second tunnel imaginary part Q passage, make between the polarization state of two main shafts and produce-45 ° of phase differential through the 3rd Polarization Controller; Ellipse polarisation through latter two quadrature of the 3rd photo-coupler (OC3) gets into second polarization beam apparatus (PBS2) again; Ellipse afterwards polarisation becomes quadrature and two complementary line polarisations; Latter two complementary OOK data stream is passed through after the identical distance in ring; Output terminal at second polarization beam apparatus produces polarization interference, and a part of phase noise among the DQPSK is transformed into amplitude noise and is present in the OOK data stream of two complementations at this moment;
6th, the above-mentioned first via real part I passage and the second tunnel imaginary part Q channel signal get into Mach moral structure regenerator once respectively after the 4th step, the 5th step handle, and utilize regenerator respectively two paths of signals to be accomplished the amplitude regeneration function; In Mach output place of moral structure regenerator once; Realize adjusting the relative phase relation of the first via, the second road signal through the electric current of regulating two arms, the signal after the final two-way regeneration Mach once the output terminal of moral structure regenerator interfere and become one road signal;
7th, with amplifying the noise of introducing in the optical band pass filter filtering OOK signal regeneration;
8th, use the 4th Polarization Controller that the corresponding respectively polarization axle of the signal of polarization state quadrature is become 45 °, through the polarizer signal of pairwise orthogonal is become a polarization state to produce the DQPSK signal again at last;
9th, the DQPSK signal after the regeneration is amplified so that subsequent applications.
Advantage of the present invention and beneficial effect:
1, the scheme simple economy is practical, removes Mach once that all the other are passive device the moral structure regenerator and Erbium-Doped Fiber Amplifier (EDFA) (EDFA), and is simple in structure.2, full photo reversal does not truly wherein relate to light-electricity-light conversion.3, solved the current difficult problem that can't realize the full light of DQPSK signal.
Description of drawings
Fig. 1 is the general structure synoptic diagram of the full photo reversal of DQPSK signal among the present invention;
Fig. 2 is DQPSK conversion of signals work block diagram among the present invention.
Among the figure, 1 is first Polarization Controller, and 2 is second Polarization Controllers; 3 is the 3rd Polarization Controllers; 4 is first photo-couplers, and 5 is second photo-couplers, and 6 is the 3rd photo-couplers; 7 is first polarization beam apparatus; 8 is second polarization beam apparatus, the 9th, and optical band pass filter, 10 is the 4th Polarization Controllers; The 11st, the polarizer, the 12nd, Erbium-Doped Fiber Amplifier (EDFA).
Combine accompanying drawing that the full photo reversal process of DQPSK signal is elaborated at present.
Embodiment
The full optical reproducing apparatus of embodiment 1, high speed DQPSK modulation signal
As shown in Figure 1, this device comprises:
First Polarization Controller 1: the deterioration DQPSK flashlight that is used for importing on the transmission link is realized the conversion of 45 ° of line polarisations;
Differential group delay line: be used for the DQPSK signal after first Polarization Controller conversion is realized that signal on x axle and two polarization states of y axle has the time-delay of a symbol period;
First photo-coupler 4: be used for the light signal behind the differential group delay is divided into two-way, the first via is as the real part of DQPSK signal, the second tunnel imaginary part as the DQPSK signal;
The first via comprises: second Polarization Controller 2, second photo-coupler 5 and first polarization beam apparatus 7; The real part of first via DQPSK signal makes by second Polarization Controller and produces one+45 ° phase differences between the polarization state of two main shafts; Ellipse polarisation by second latter two quadrature of photo-coupler gets into first polarization beam apparatus again; Ellipse afterwards polarisation becomes quadrature and two complementary line polarisations; Latter two complementary OOK data flow is passed through after the identical distance in ring; Output at first polarization beam apparatus produces polarization interference, and a part of phase noise among the DQPSK is transformed into amplitude noise and is present in the OOK data flow of two complementations at this moment;
The second the tunnel comprises: the 3rd Polarization Controller 3, the 3rd photo-coupler 6 and second polarization beam apparatus 8; The imaginary part of the second road DQPSK signal makes by the 3rd Polarization Controller equally and produces-45 ° of phase differences between the polarization state of two main shafts; Ellipse polarisation by the 3rd latter two quadrature of photo-coupler gets into second polarization beam apparatus again; Ellipse afterwards polarisation becomes quadrature and two complementary line polarisations; Latter two complementary OOK data flow is passed through after the identical distance in ring; Output at second polarization beam apparatus can produce polarization interference, and a part of phase noise among the DQPSK is transformed into amplitude noise and is present in the OOK data flow of two complementations at this moment;
Mach moral structure regenerator once: be used to accomplish light intensity regeneration, adjust the time-delay of two paths of signals simultaneously, and two ways of optical signals is interfered and become one road signal the most at last to above-mentioned two paths of data;
Optical band pass filter 9: be used for the noise that the moral structure regenerator regenerative process light amplification once of filtering Mach is introduced;
The 4th Polarization Controller 10: the corresponding respectively polarization axle of the signal of polarization state quadrature is become 45 °;
The polarizer 11: the signal of pairwise orthogonal is become a polarization state to produce the DQPSK signal again;
Erbium-Doped Fiber Amplifier (EDFA) 12: the DQPSK signal to after the regeneration amplifies so that subsequent applications;
Described Mach once moral structure regenerator is to have Mach moral structure and have the semiconductor optical amplifier of regeneration function once.
The full optical regeneration method of embodiment 2, high speed DQPSK modulation signal
The full optical regeneration method of high speed DQPSK modulation signal of the present invention comprises, the demodulation of DQPSK signal, OOK signal regeneration, the generation of regeneration back DQPSK signal.Concrete steps are following:
The deterioration DQPSK signal that transmits from transmission line at first gets into the DQPSK signal demodulation part of regenerating unit shown in Figure 1, through first Polarization Controller 1 (PC1) polarization state of the DQPSK signal that worsens is become 45 ° of linear polarization;
Then the DQPSK signal is through differential group delay line (DGD), makes signal on two polarization states of x axle and y axle that the time-delay of a symbol period arranged;
And then by the first photo-coupler 4(OC1) output of differential group delay line DGD is divided into identical two-way: the first via is expressed as the I passage wherein; And following the second the tunnel represent the Q passage; In the I passage by the second Polarization Controller 2(PC2) make and produce one+45 ° phase differences between the polarization state of two main shafts; Again by the second photo-coupler 5(OC2) the ellipse polarisation of latter two quadrature gets into the first polarization beam apparatus 7(PBS1); Ellipse afterwards polarisation becomes quadrature and two complementary line polarisations; Latter two complementary OOK data flow is passed through after the identical distance in ring; Output at first polarization beam apparatus can produce polarization interference, and a part of phase noise among the DQPSK is transformed into amplitude noise and is present in the OOK data flow of two complementations at this moment.-45 ° of phase differential of generation between the same polarization state that makes two main shafts through the 3rd Polarization Controller 3 (PC3) of Q passage; Ellipse polarisation through the 3rd latter two quadrature of photo-coupler 6 (OC3) gets into second polarization beam apparatus 8 (PBS2) again; Ellipse afterwards polarisation becomes quadrature and two complementary line polarisations; Latter two complementary OOK data stream is passed through after the identical distance in ring; Output terminal at second polarization beam apparatus can produce polarization interference, and a part of phase noise among the DQPSK is transformed into amplitude noise and is present in the OOK data stream of two complementations at this moment.Obtain the complementary OOK signal of two-way at this, in this process, make the phase noise of DQPSK signal be converted into amplitude noise, see Fig. 2.
Above-mentioned I passage and Q channel signal get into Mach moral structure regenerator once, utilize regenerator respectively two paths of signals to be accomplished the amplitude regeneration function.
At Mach once in the moral structure regenerator; Can realize adjusting the relative phase relation of two paths of signals up and down through the electric current of regulating two arms; Signal after the final two-way regeneration Mach once the output terminal of moral structure regenerator interfere and become one road signal; In this process, eliminate amplitude noise the OOK signal is regenerated, make the complementary signal of two-way synthetic a tunnel simultaneously.
Then come the noise that amplifier is introduced in the regenerative process of filtering front through optical band pass filter 9.
Signal after regenerating is become and the same pattern of original DQPSK signal with the polarizer 11 through the 4th Polarization Controller 10 at last, and carry out light amplification so that use the back through Erbium-Doped Fiber Amplifier (EDFA) 12.
Claims (3)
1. the full optical reproducing apparatus of a high speed DQPSK modulation signal is characterized in that this device comprises:
First Polarization Controller: the deterioration DQPSK flashlight that is used for importing on the transmission link is realized the conversion of 45 ° of line polarisations;
Differential group delay line: be used for the DQPSK signal after first Polarization Controller conversion is realized that signal on x axle and two polarization states of y axle has the time-delay of a symbol period;
First photo-coupler: be used for the light signal behind the differential group delay is divided into two-way, the first via is as the real part of DQPSK signal, the second tunnel imaginary part as the DQPSK signal;
The first via comprises: second Polarization Controller, second photo-coupler and first polarization beam apparatus; The real part of first via DQPSK signal makes by second Polarization Controller and produces one+45 ° phase differences between the polarization state of two main shafts; Ellipse polarisation by second latter two quadrature of photo-coupler gets into first polarization beam apparatus again; Ellipse afterwards polarisation becomes quadrature and two complementary line polarisations; Latter two complementary OOK data flow is passed through after the identical distance in ring; Output at first polarization beam apparatus produces polarization interference, and a part of phase noise among the DQPSK is transformed into amplitude noise and is present in the OOK data flow of two complementations at this moment;
The second the tunnel comprises: the 3rd Polarization Controller, the 3rd photo-coupler and second polarization beam apparatus; The imaginary part of the second road DQPSK signal makes by the 3rd Polarization Controller equally and produces-45 ° of phase differences between the polarization state of two main shafts; Ellipse polarisation by the 3rd latter two quadrature of photo-coupler gets into second polarization beam apparatus again; Ellipse afterwards polarisation becomes quadrature and two complementary line polarisations; Latter two complementary OOK data flow is passed through after the identical distance in ring; Output at second polarization beam apparatus can produce polarization interference, and a part of phase noise among the DQPSK is transformed into amplitude noise and is present in the OOK data flow of two complementations at this moment;
Mach moral structure regenerator once: be used to accomplish light intensity regeneration, adjust the time-delay of two paths of signals simultaneously, and two ways of optical signals is interfered and become one road signal the most at last to above-mentioned two paths of data;
Optical band pass filter: be used for the noise that the moral structure regenerator regenerative process light amplification once of filtering Mach is introduced;
The 4th Polarization Controller: the corresponding respectively polarization axle of the signal of polarization state quadrature is become 45 °;
The polarizer: the signal of pairwise orthogonal is become a polarization state to produce the DQPSK signal again;
Erbium-Doped Fiber Amplifier (EDFA): be used for amplification to the back DQPSK signal of regenerating.
2. device according to claim 1, it is characterized in that described Mach once moral structure regenerator be to have Mach moral structure and have the semiconductor optical amplifier of regeneration function once.
3. a full optical regeneration method that adopts the said device of claim 1 to realize high speed DQPSK modulation signal is characterized in that, this method is passed through following steps and realized:
1st, through first Polarization Controller (PC1) polarization state of the DQPSK signal that worsens is become 45 ° of linear polarization;
2nd, the DQPSK signal that will go up after the step changes is partially sent into differential group delay line (DGD), makes signal on two polarization states of x axle and y axle that the time-delay of a symbol period arranged;
3rd, and then through first photo-coupler (OC1) output of differential group delay line is divided into identical two-way: the first via is expressed as real part I passage wherein, and following the second the tunnel represent imaginary part Q passage;
The 4th; In first via real part I passage, make between the polarization state of two main shafts and produce one+45 ° phase differential through second Polarization Controller; Ellipse polarisation through latter two quadrature of second photo-coupler (OC2) gets into first polarization beam apparatus (PBS1) again; Ellipse afterwards polarisation becomes quadrature and two complementary line polarisations; Latter two complementary OOK data stream is passed through after the identical distance in ring; Output terminal at first polarization beam apparatus produces polarization interference, and a part of phase noise among the DQPSK is transformed into amplitude noise and is present in the OOK data stream of two complementations at this moment;
The 5th; Equally; In the second tunnel imaginary part Q passage, make between the polarization state of two main shafts and produce-45 ° of phase differential through the 3rd Polarization Controller; Ellipse polarisation through latter two quadrature of the 3rd photo-coupler (OC3) gets into second polarization beam apparatus (PBS2) again; Ellipse afterwards polarisation becomes quadrature and two complementary line polarisations; Latter two complementary OOK data stream is passed through after the identical distance in ring; Output terminal at second polarization beam apparatus produces polarization interference, and a part of phase noise among the DQPSK is transformed into amplitude noise and is present in the OOK data stream of two complementations at this moment;
6th, the above-mentioned first via real part I passage and the second tunnel imaginary part Q channel signal get into Mach moral structure regenerator once respectively after the 4th step, the 5th step handle, and utilize regenerator respectively two paths of signals to be accomplished the amplitude regeneration function; At Mach once in the moral structure regenerator, realize adjusting the relative phase relation of the first via, the second road signal through the electric current of regulating two arms, the signal after the final two-way regeneration Mach once the output terminal of moral structure regenerator interfere and become one road signal;
7th, with amplifying the noise of introducing in the optical band pass filter filtering OOK signal regeneration;
8th, use the 4th Polarization Controller that the corresponding respectively polarization axle of the signal of polarization state quadrature is become 45 °, through the polarizer signal of pairwise orthogonal is become a polarization state to produce the DQPSK signal again at last;
9th, the DQPSK signal after the regeneration is amplified so that subsequent applications.
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| CN102624460A (en) * | 2012-01-16 | 2012-08-01 | 北京大学 | Modulator for optical fibre linear transmission and third-order intermodulation suppression method for modulator |
| CN103117812A (en) * | 2013-01-24 | 2013-05-22 | 华中科技大学 | Regenerator suitable for wavelength division multiplex-differential phase shift keying (WDM-DPSK) optical signals |
| CN103780308A (en) * | 2014-01-13 | 2014-05-07 | 电子科技大学 | Multi-wavelength all-optical regenerative device capable of inhibiting crosstalk and method thereof |
| CN104378159A (en) * | 2014-12-01 | 2015-02-25 | 中国人民解放军信息工程大学 | Multilayer modulation visible light communication method, transmitter, receiver and system |
| CN107070559A (en) * | 2017-03-31 | 2017-08-18 | 南京恒高光电研究院有限公司 | A kind of full optical phase modulator |
| CN112383362A (en) * | 2020-10-17 | 2021-02-19 | 北京邮电大学 | Method and system for regenerating MPSK (Multi-phase Shift keying) signal carrying ASE (amplified spontaneous emission) noise |
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| CN102624460A (en) * | 2012-01-16 | 2012-08-01 | 北京大学 | Modulator for optical fibre linear transmission and third-order intermodulation suppression method for modulator |
| CN102624460B (en) * | 2012-01-16 | 2014-09-10 | 北京大学 | Modulator for optical fibre linear transmission and third-order intermodulation suppression method for modulator |
| CN103117812A (en) * | 2013-01-24 | 2013-05-22 | 华中科技大学 | Regenerator suitable for wavelength division multiplex-differential phase shift keying (WDM-DPSK) optical signals |
| CN103117812B (en) * | 2013-01-24 | 2015-08-05 | 华中科技大学 | A kind of regenerator being applicable to WDM-DPSK light signal |
| CN103780308A (en) * | 2014-01-13 | 2014-05-07 | 电子科技大学 | Multi-wavelength all-optical regenerative device capable of inhibiting crosstalk and method thereof |
| CN103780308B (en) * | 2014-01-13 | 2017-01-25 | 电子科技大学 | Multi-wavelength all-optical regenerative device capable of inhibiting crosstalk and method thereof |
| CN104378159A (en) * | 2014-12-01 | 2015-02-25 | 中国人民解放军信息工程大学 | Multilayer modulation visible light communication method, transmitter, receiver and system |
| CN107070559A (en) * | 2017-03-31 | 2017-08-18 | 南京恒高光电研究院有限公司 | A kind of full optical phase modulator |
| CN107070559B (en) * | 2017-03-31 | 2019-04-30 | 南京恒高光电研究院有限公司 | A kind of full optical phase modulator |
| CN112383362A (en) * | 2020-10-17 | 2021-02-19 | 北京邮电大学 | Method and system for regenerating MPSK (Multi-phase Shift keying) signal carrying ASE (amplified spontaneous emission) noise |
| CN112383362B (en) * | 2020-10-17 | 2021-12-03 | 北京邮电大学 | Method and system for regenerating MPSK (Multi-phase Shift keying) signal carrying ASE (amplified spontaneous emission) noise |
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