Author Affiliations
Abstract
1 Key Laboratory of Specialty Fiber Optics and Optical Access Networks, Shanghai University, Shanghai 200072, China
2 College of Information Science and Technology, Donghua University, Shanghai 201620, China
3 School of Electronic and Information Engineering, Beihang University, Beijing 100191, China
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.
1 北京航空航天大学 电子信息工程学院光电与信息工程系，北京 100083
2 中国工程物理研究院电子工程研究所，四川 绵阳 621900
介绍了光纤氢传感器的应用背景和工作原理，分析了其中的微镜式传感器。针对在垂直入射、单次反射方式下工作的微镜式光纤氢传感器，提出了多次反射的传感器模型。从金属光反射模型出发，研究了入射角、反射次数对探测灵敏度的影响。论证了通过多次反射来提高传感器探测灵敏度的可行性。
光纤氢传感器 微镜 多次反射 入射角 反射次数 optical fiber hydrogen sensor micro-mirror multiple reflection angle of incidence times of reflection.
