垂直双抽运结构PM-OFDM信号对全光波长变换系统的影响

Influence of Orthogonal Dual-Pump PM-OFDM Signal on All-Optical Wavelength Conversion System

对垂直双抽运结构的偏振复用信号在半导体光放大器(SOA)中的全光波长变换(AOWC)进行了研究。理论分析了激光器线宽对此系统性能的影响,仿真研究了偏振复用-正交频分复用(PM-OFDM)信号在此系统中传输的性能。仿真结果显示,当系统的光信噪比为10dB时,10Gbit/s的PM-OFDM信号经过SOA中的四波混频效应后,在接收端能够实现无串扰偏振不敏感PM信号的接收,其中x和y方向对应的系统误码率分别为1.16×10-4和1.06×10-5。仿真结果表明激光器线宽,OFDM信号的子载波个数,信道功率,以及OFDM调制格式均与系统波长转换效率有关,且仿真结果与理论推导结果一致。

The all-optical wavelength conversion （AOWC） based on orthogonal dual pump for polarization multiplexing signal in semiconductor optical amplifier （SOA） is investigated. The influence of laser line width on the performance of all-optical wavelength conversion is theoretically investigated, and the transmission performance of polarization-multiplexing-orthogonal-frequency-division-multiplexing （PM-OFDM） signal in the system is simulated. The simulation results show that when the optical signal-to-noise ratio is 10 dB, the polarization insensitive signal can be received as two light waves without crosstalk as a result of four-wave mixing effect for 10 Gbit/s PM-OFDM signal propagating in the SOA, and the bit error rates are 1. 16×10^（-4） in x- direction and 1.06 × 10 ^（-5） in y-direction, respectively. Meanwhile, the simulation results indicate that laser line-width, number of sub-carriers of OFDM signal, channel power, and modulation format obviously influence the AOWC conversion efficiency. The theoretical derivation is well consistent with the simulation result.