All-optical differentiator and high-speed pulse generation based on cross-polarization modulation in a semiconductor optical amplifier

作者：Li, Zhengyong; Wu, Chongqing

来源：Optics Letters, 2009, 34(6): 830-832.

DOI：10.1364/OL.34.000830

We propose an all-optical intensity differentiation scheme based on cross-polarization modulation (XPolM) in a semiconductor optical amplifier (SOA) while demonstrating the absolute value of differential signal that can be obtained by the SOA-based XPolM of two parts with relative delay from the input signal and well extracted by the polarization filter. The differentiation errors and eye diagrams versus sampling time A are investigated for data rate at 12.5 Gbits/s, and the minimal error similar to 0.06 is achieved at Delta=0. Owing to a much faster polarization response, our scheme bears great potential for all-optical signal processing over 100 Gbits/s. By application of the differentiator, we further obtain the 20 GHz short pulse train with a pulse width of similar to 10 ps.

• 出版日期2009-3-15
• 单位北京交通大学