Yang Yi,Xiao Zhong-yin,Liu Jian-sheng,Wang Guan-jun.Optical transient waveform monitoring based on cross-gain modulation in semiconductor optical amplifier[J].Optoelectronics Letters,2012,8(1):40-42 Optical transient waveform monitoring based on cross-gain modulation in semiconductor optical amplifier Author Name Affiliation Yang Yi  Key Laboratory of Specially Fiber Optics and Optical Access Nerworks, Shanghai Universiry, Shangh.ai 200072, China  Xiao Zhong-yin  Key Laboratory of Specially Fiber Optics and Optical Access Nerworks, Shanghai Universiry, Shangh.ai 200072, China  Liu Jian-sheng  School of Electronic and Information Engineering, Beihang University, Bezjing 100191, China  Wang Guan-jun  School of Electronic and Information Engineering, Beihang University, Bezjing 100191, China  Abstract:       An all-optical transient waveform equivalent time sampling system based on cross-gain modulation (XGM) in semiconductor optical amplifier (SOA) is presented. A noisy SOA dynamic model and PIN equivalent circuit function are employed for system evaluating. The results show this SOA-XGM sampler with subtracting postprocessing can achieve picosecond sampling window. The shape of sampling window can be adjusted by SOA bias current and amplitude of control pulse. Compared with amplified spontaneous emission (ASE) noise of SOA and thermal noise in PIN, the jitter of sampling control pulse causes most sampling error. Simulations show that this SOA-XGM sampler can be a capable candidate for transient waveform sampling. Hits: 3998 Download times: 446 This work has been supported by the National Natural Science Foundation of China (No.61077068), and the Science and Technology Commission View Full Text    Download reader