基于半导体光放大器四波混频效应的多种调制格式的波长转换实验  

Experimental Study of Wavelength Conversion at Various Modulation Formats Based on Four-Wave Mixing in a Semiconductor Optical Amplifier

作　　者：董建绩[1] 张新亮[1] 黄德修[1] 

机构地区：[1]华中科技大学光电子科学与工程学院武汉光电国家实验室,湖北武汉430074

出　　处：《光学学报》2008年第7期1327-1332,共6页Acta Optica Sinica

基　　金：国家863计划(2006AA03Z0414);国家自然科学基金(60577007);湖北省杰出青年人才基金(2006ABB017);教育部新世纪优秀支持人才计划(NCET-04-0715)资助课题

摘　　要：实验报道了利用半导体光放大器(SOA)的四波混频(FWM)效应实现多种码型的波长转换,其中对于非归零(NRZ)信号实现了从单信道到三信道的多波长转换,调制速率从10 Gb/s到40 Gb/s均实现多波长转换。对于归零(RZ)信号分别实现了20 Gb/s和40 Gb/s的RZ格式的波长转换和40 Gb/s的载波抑制归零(CSRZ)格式的波长转换,利用光纤布拉格光栅(FBG)作为带陷滤波器消除共轭光和抽运光之间的串扰。对于非归零差分相移键控(NRZ-DPSK)信号分别实现了20 Gb/s和40 Gb/s的波长转换,利用实验室自制的光纤延时干涉仪进行NRZ-DPSK信号的解调。基于FWM效应的转换光的输出消光比大于7 dB,转换后消光比退化约为3 dB。The wavelength conversion based on four-wave mixing （FWM） in semiconductor optical amplifier （SOA） for a variety of modulation formats is demonstrated. As for nonreturn-to-zero （NRZ） format, the single-to-triple channel wavelength conversion is reported. The modulation speed varies from 10 Gb/s to 40 Gb/s. As for return-to- zero （RZ） format, the wavelength conversion at 20 Gb/s and 40 Gb/s is realized. As for carrier suppressed RZ （CSRZ） format, the 40 Gb/s wavelength conversion is achieved. A notch filter made by fiber Bragg grating is used to separate the conjugated light and the pump light. As for NRZ-differential phase shift keying （DPSK） format, the wavelength conversion at 20 Gb/s and 40 Gb/s is realized. A home-made fiber delayed interferometer （FDI） is employed to demodulate the converted DPSK signal. The output extinction ratio （ER） of the converted signal based on FWM is higher than 7 dB, and the ER degradation is about 3 dB.

关 键 词：半导体光放大器 四波混频 波长转换 多点传送 

分 类 号：TN929.11[电子电信—通信与信息系统]