高阶相位调制信号的全光处理技术研究
发布时间：2018-08-28 17:37
【摘要】：全光信号处理技术是直接在光域对信号进行处理,摆脱了“电子瓶颈”的限制,是未来光纤通信网络的演进方向。其中,四波混频(Four-Wave Mixing,FWM)效应在全光信号处理技术中有着广泛地应用,可以实现参量放大、全光再生、全光逻辑等多种信号处理功能。本文基于泵浦消耗情形下FWM参量过程的解析解,采用Matlab编程方法,研究了高非线性光纤(Highly-Nonlinear Fiber,HNLF)中高阶相位调制信号的全光相位再生和相位混合运算的性能,主要工作内容如下:1.在考虑泵浦消耗的情形下,详细推导了简并和非简并FWM耦合模方程的解析解,采用第一类、第三类勒让德椭圆积分以及雅阁比椭圆函数给出了信号的相位和功率的解析表达式,以及相应的Matlab函数命令。解析计算结果与四波混频耦合模方程的严格数值计算结果一致,验证了理论推导过程的正确性。2.根据相敏放大(Phase-Sensitive Amplifier,PSA)原理设计了8PSK(Phase-Shift Keying)光纤再生器。利用相位和功率的解析表达式分析了基于简并FWM的多电平相位再生条件,研究了泵浦光初始相位和功率对M-PSK信号相位转移特性的影响。研究表明,调节泵浦光初始相位可使PSA的相位转移曲线与输入信号的多电平相位相匹配,相位再生器的抖动抑制性能可通过调节泵浦光初始功率来优化,所需光纤长度与优化的初始泵浦光功率近似呈反比。对所设计的8PSK光纤再生器进行了OptiSystem仿真,仿真结果表明,当归一化输入相位抖动为0.1时(即输入噪声的标准差为0.1?π4rad),该相位再生器的抖动抑制比为4.62,系统的符号错误率可降低两个数量级。3.利用简并四波混频光互调效应,设计了基于非相敏放大(Phase-Insensitive Amplifier,PIA)的相位运算器,实现了两个信号相位的2A B?-?和2B A?-?混合运算。以四进制相位信号为例,实现了四进制数字的乘减运算(2A-B,2B-A),并分析了输入光幅度噪声对两种相位互调运算结果的影响。仿真计算表明,该运算器件的光噪声指数(光信噪比的劣化)约为6.6dB;当输入光信噪比(Optical Signal Noise Ratio,OSNR)不低于25dB时,两种运算的符号错误率(Symbol-Error Rate,SER)均低于10-3,对应的误差矢量幅度(Error Vector Magnitude,EVM)约为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.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN929.11
本文编号：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.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN929.11
【参考文献】
相关期刊论文 前5条
1 王睿;任全胜;赵建业;;光学神经拟态计算研究进展[J];激光与光电子学进展;2016年12期
2 王智;;高速光通信中的全光数字信号处理技术[J];科技导报;2016年16期
3 刘彦楠;牧笛;;一种新型高速四进制光计算算法研究[J];光通信技术;2014年08期
4 武保剑;文峰;周星宇;邱昆;;光交换节点中的全光再生技术研究[J];应用光学;2013年04期
5 史森;闫娟娟;郑铮;;相位调制信号的全光再生技术[J];光子学报;2009年09期
相关硕士学位论文 前1条
1 陈光;高速光纤通信系统中多级相位调制码及其相位恢复的研究[D];北京邮电大学;2012年
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