高階相位調(diào)制信號(hào)的全光處理技術(shù)研究
發(fā)布時(shí)間：2018-08-28 17:37
【摘要】：全光信號(hào)處理技術(shù)是直接在光域?qū)π盘?hào)進(jìn)行處理,擺脫了“電子瓶頸”的限制,是未來光纖通信網(wǎng)絡(luò)的演進(jìn)方向。其中,四波混頻(Four-Wave Mixing,FWM)效應(yīng)在全光信號(hào)處理技術(shù)中有著廣泛地應(yīng)用,可以實(shí)現(xiàn)參量放大、全光再生、全光邏輯等多種信號(hào)處理功能。本文基于泵浦消耗情形下FWM參量過程的解析解,采用Matlab編程方法,研究了高非線性光纖(Highly-Nonlinear Fiber,HNLF)中高階相位調(diào)制信號(hào)的全光相位再生和相位混合運(yùn)算的性能,主要工作內(nèi)容如下:1.在考慮泵浦消耗的情形下,詳細(xì)推導(dǎo)了簡并和非簡并FWM耦合模方程的解析解,采用第一類、第三類勒讓德橢圓積分以及雅閣比橢圓函數(shù)給出了信號(hào)的相位和功率的解析表達(dá)式,以及相應(yīng)的Matlab函數(shù)命令。解析計(jì)算結(jié)果與四波混頻耦合模方程的嚴(yán)格數(shù)值計(jì)算結(jié)果一致,驗(yàn)證了理論推導(dǎo)過程的正確性。2.根據(jù)相敏放大(Phase-Sensitive Amplifier,PSA)原理設(shè)計(jì)了8PSK(Phase-Shift Keying)光纖再生器。利用相位和功率的解析表達(dá)式分析了基于簡并FWM的多電平相位再生條件,研究了泵浦光初始相位和功率對(duì)M-PSK信號(hào)相位轉(zhuǎn)移特性的影響。研究表明,調(diào)節(jié)泵浦光初始相位可使PSA的相位轉(zhuǎn)移曲線與輸入信號(hào)的多電平相位相匹配,相位再生器的抖動(dòng)抑制性能可通過調(diào)節(jié)泵浦光初始功率來優(yōu)化,所需光纖長度與優(yōu)化的初始泵浦光功率近似呈反比。對(duì)所設(shè)計(jì)的8PSK光纖再生器進(jìn)行了OptiSystem仿真,仿真結(jié)果表明,當(dāng)歸一化輸入相位抖動(dòng)為0.1時(shí)(即輸入噪聲的標(biāo)準(zhǔn)差為0.1?π4rad),該相位再生器的抖動(dòng)抑制比為4.62,系統(tǒng)的符號(hào)錯(cuò)誤率可降低兩個(gè)數(shù)量級(jí)。3.利用簡并四波混頻光互調(diào)效應(yīng),設(shè)計(jì)了基于非相敏放大(Phase-Insensitive Amplifier,PIA)的相位運(yùn)算器,實(shí)現(xiàn)了兩個(gè)信號(hào)相位的2A B?-?和2B A?-?混合運(yùn)算。以四進(jìn)制相位信號(hào)為例,實(shí)現(xiàn)了四進(jìn)制數(shù)字的乘減運(yùn)算(2A-B,2B-A),并分析了輸入光幅度噪聲對(duì)兩種相位互調(diào)運(yùn)算結(jié)果的影響。仿真計(jì)算表明,該運(yùn)算器件的光噪聲指數(shù)(光信噪比的劣化)約為6.6dB;當(dāng)輸入光信噪比(Optical Signal Noise Ratio,OSNR)不低于25dB時(shí),兩種運(yùn)算的符號(hào)錯(cuò)誤率(Symbol-Error Rate,SER)均低于10-3,對(duì)應(yīng)的誤差矢量幅度(Error Vector Magnitude,EVM)約為22%。
[Abstract]:The all-optical signal processing technology is to process the signal directly in the optical domain, which gets rid of the limitation of "electronic bottleneck", and is the evolution direction of the optical fiber communication network in the future. Among them, four-wave mixing (Four-Wave Mixing,FWM) effect is widely used in all-optical signal processing technology, which can realize many signal processing functions, such as parametric amplification, all-optical regeneration, all-optical logic and so on. Based on the analytical solution of FWM parametric process under pump consumption, the all-optical phase regeneration and phase mixing performance of high-order phase modulated signals in high nonlinear optical fiber (Highly-Nonlinear Fiber,HNLF) are studied by using Matlab programming method. The main work is as follows: 1. The analytical solutions of degenerate and non-degenerate FWM coupling mode equations are derived in detail in the case of pump consumption. The phase and power of the signal are obtained by using the first class, the third type Legendre elliptic integral and the Jacobi elliptic function. And the corresponding Matlab function command. The analytical results are in agreement with the rigorous numerical results of the coupled mode equation of four-wave mixing, which verifies the correctness of the theoretical derivation. A 8PSK (Phase-Shift Keying) fiber regenerator is designed according to the principle of phase sensitive amplification (Phase-Sensitive Amplifier,PSA). The multilevel phase regeneration condition based on degenerate FWM is analyzed by using the analytical expressions of phase and power. The effects of initial phase and power of pump light on the phase transfer characteristics of M-PSK signal are studied. It is shown that the phase transfer curve of PSA can match the multilevel phase of the input signal by adjusting the initial phase of the pump light, and the jitter suppression performance of the phase regenerator can be optimized by adjusting the initial power of the pump light. The required fiber length is approximately inversely proportional to the optimized initial pump power. The designed 8PSK fiber regenerator is simulated by OptiSystem. The simulation results show that, When the normalized input phase jitter is 0.1 (i.e. the standard deviation of input noise is 0.1? 蟺 4rad), the jitter suppression ratio of the phase regenerator is 4.62, and the symbol error rate of the system can be reduced by two orders of magnitude. Using degenerate four-wave mixing optical intermodulation effect, a phase operator based on non-phase-sensitive amplification (Phase-Insensitive Amplifier,PIA) is designed. And 2B Agnes? Mixed operation. Taking the quaternary phase signal as an example, the multiplication and subtraction operation of the quaternary number (2A-Bn 2B-A) is realized, and the influence of the input optical amplitude noise on the results of the two phase intermodulation operations is analyzed. The simulation results show that the optical noise index (the degradation of optical signal-to-noise ratio) is about 6.6 dB, and when the input optical signal-to-noise ratio (Optical Signal Noise Ratio,OSNR) is not lower than 25dB, The symbol error rate (Symbol-Error Rate,SER) of both operations is lower than 10-3, and the corresponding error vector amplitude (Error Vector Magnitude,EVM) is about 22.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TN929.11
本文編號(hào)：2210095
[Abstract]:The all-optical signal processing technology is to process the signal directly in the optical domain, which gets rid of the limitation of "electronic bottleneck", and is the evolution direction of the optical fiber communication network in the future. Among them, four-wave mixing (Four-Wave Mixing,FWM) effect is widely used in all-optical signal processing technology, which can realize many signal processing functions, such as parametric amplification, all-optical regeneration, all-optical logic and so on. Based on the analytical solution of FWM parametric process under pump consumption, the all-optical phase regeneration and phase mixing performance of high-order phase modulated signals in high nonlinear optical fiber (Highly-Nonlinear Fiber,HNLF) are studied by using Matlab programming method. The main work is as follows: 1. The analytical solutions of degenerate and non-degenerate FWM coupling mode equations are derived in detail in the case of pump consumption. The phase and power of the signal are obtained by using the first class, the third type Legendre elliptic integral and the Jacobi elliptic function. And the corresponding Matlab function command. The analytical results are in agreement with the rigorous numerical results of the coupled mode equation of four-wave mixing, which verifies the correctness of the theoretical derivation. A 8PSK (Phase-Shift Keying) fiber regenerator is designed according to the principle of phase sensitive amplification (Phase-Sensitive Amplifier,PSA). The multilevel phase regeneration condition based on degenerate FWM is analyzed by using the analytical expressions of phase and power. The effects of initial phase and power of pump light on the phase transfer characteristics of M-PSK signal are studied. It is shown that the phase transfer curve of PSA can match the multilevel phase of the input signal by adjusting the initial phase of the pump light, and the jitter suppression performance of the phase regenerator can be optimized by adjusting the initial power of the pump light. The required fiber length is approximately inversely proportional to the optimized initial pump power. The designed 8PSK fiber regenerator is simulated by OptiSystem. The simulation results show that, When the normalized input phase jitter is 0.1 (i.e. the standard deviation of input noise is 0.1? 蟺 4rad), the jitter suppression ratio of the phase regenerator is 4.62, and the symbol error rate of the system can be reduced by two orders of magnitude. Using degenerate four-wave mixing optical intermodulation effect, a phase operator based on non-phase-sensitive amplification (Phase-Insensitive Amplifier,PIA) is designed. And 2B Agnes? Mixed operation. Taking the quaternary phase signal as an example, the multiplication and subtraction operation of the quaternary number (2A-Bn 2B-A) is realized, and the influence of the input optical amplitude noise on the results of the two phase intermodulation operations is analyzed. The simulation results show that the optical noise index (the degradation of optical signal-to-noise ratio) is about 6.6 dB, and when the input optical signal-to-noise ratio (Optical Signal Noise Ratio,OSNR) is not lower than 25dB, The symbol error rate (Symbol-Error Rate,SER) of both operations is lower than 10-3, and the corresponding error vector amplitude (Error Vector Magnitude,EVM) is about 22.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TN929.11
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