光分组交换网络中增益光开关技术研究

Technical Research on Optical Gain Switch in Optical Packet Switching Network

针对光分组交换网络中光开关插入损耗导致交换跳数受限的问题,基于半导体光放大器四波混频非线性效应,提出了一种两级级联的增益光开关技术思路,可以有效实现光交换后输出信号的增益补偿及形状再生,提高信号质量.利用Opti System仿真平台,优化系统参数,在泵浦光位于信号光中心波长±4 nm范围、泵浦光功率在(3~15)d Bm区间内,增益光交换输出信号通过增益补偿和形状再生相较于一级交换输出信号可实现增益大于25 d B、误码率从10-5提高至10-18、Q因子从4.16提高至8.71的大幅度质量改善.该技术在多跳光分组交换网络中有较大应用前景.

Since the number of switching hops are severely restricted by the insertion loss of optical switches in an optical packet switching network. A two-cascaded optical gain switch based on four-wave mixing nonlinear effects in semiconductor optical amplifiers was investigated. By using this method,the quality of output signal from the optical switching will be improved as well as achieving the shape regeneration and power compensation,which means the limitation could be overcomed. The result from the OPTISYSTEM simulation platform shows that,in an optimization system,the maximum of the gain is more than 25 d B,meanwhile the bit error rate and Q factor could gain a high promotion（ from 10-5 to 10-18 and 4. 16 to 8. 71,respectively）,with the pump wavelength located at the center wavelength of the signal light within ± 4 nm,the power ranging from3 d Bm to 15 d Bm. This optical gain switch system will have great application prospect in optical packet switching network with multi-hops.