利用光参变放大同时实现双波长全光判决的实验研究

Experimental Research on Dual Wavelength All-Optical Decision Based on Fiber-Optical Parametric Amplifier

为了能够对多路光信号同时实现整形再生,提出了一种在高非线性光纤(HNLF)中利用单抽运光参变放大(OPA)同时实现双波长全光判决的实验方案。该方案基于一段500m长的HNLF,输入信号为两路不同波长的10Gb/s伪随机归零(RZ)码信号,抽运光为10GHz的时钟脉冲。信号光与抽运光在HNLF中发生参变过程,通过两个光带通滤波器,分别滤出两路闲频光波长信号,可以在同一段HNLF中同时实现双波长全光判决。实验中,对两路10Gb/s伪随机归零码信号进行了恶化,以仿真长距离传输损耗及失真,恶化后信号的消光比(ER)分别为9.17dB和8.27dB,判决后的信号ER分别提高到12.8dB和12.66dB。通过实验论证了一种双波长全光判决的实现方案。

A novel experimental scheme is reported about double wavelength decision using optical fiber parametric amplifier in a highly nonlinear fiber（HNLF）.So multi-channels signals can be reshaped and regenerated simultaneously.This scheme is based on a coil 500 m HNLF.The input signals are two channels of 10 Gb/s return-to-zero（RZ）pseudorandom bit sequence with different wavelengths,and the pump is clock pulse with 10 GHz frequency.Parameters process of signal and pump occurred at HNLF,two idlers are filtered through two different center wavelength optical band pass filters,then the all-optical decision is realized.In the experiment,two channels of 10 Gb/s RZ are firstly deteriorated for simulating the long-haul transmission loss and distortion.The extinction ratio（ER）of deteriorated signal is respectively 9.17 dB and 8.27 dB,and the ER of decision signal is 12.8 dB and 12.66 dB.A scheme of dual wavelength all optical decision is demonstrated through the experiment.