Investigation On Characteristic Acquisition Of High-Speed Optical Signal Based On SOA

With the continuous development of optical communication technology, the transmission capacity and transmission rate of optical fiber has been greatly improved, all-optical signal processing technology is the only way to the future high-speed all-optical network. All-optical signal processing technology is mainly based on optical nonlinear effects,so the application of SOA in all-optical signal processing has attracted more and more attention and becomes the mainstream in the field of all-optical signal processing. How to use the existing technology to realize real-time and effective analysis and processing of high-speed optical signals, and to master receiving signal quality accurately, and to ensure the stability and reliability of the communication system is an urgent problem to be solved. The main research works are as follows:This paper introduces the basic model characteristics of SOA,several nonlinear effects, and its application in mode-locked lasers.Mode-locking technology includes active, passive and mixed mode-locking, passive mode-locked lasers can produce narrower pulses,but have low repetition rates, active-mode-locked lasers can produce high pulse repetition rates. In this paper, active mode-locking is used to generate optical pulses with high repetition frequency and moderate width. The SOA with high saturated output and short carrier recovery time is selected.The nonlinear polarization rotation effect of SOA is studied, and its application in all-optical sampling is discussed. Two basic sampling schemes are proposed. The proposed optical sampling scheme is based on SOA's nonlinear polarization rotation, and the measured signal is as the probe light, the sampling pulse is as the pump light, this paper analyzes the parameters of optical sampling program model, the results obtained for the actual experiment has provided certain parameters to realize high-speed optical linear sampling, and to complete sampling for simultaneous amplitude and phase acquisition.The optical switch of terahertz optical asymmetric de-multiplexer structure based on quantum dot semiconductor optical amplifier is discussed. Based on the QD-SOA three-level model, the appropriate parameters are selected according to the optical field transmission equation and rate equation. Static and dynamic simulation is conducted for research and analysis of QD-SOA transmission characteristics. On this basis, a low-switching-energy, high linearity TOAD all-optical sampling gate is implemented. The working principle and theoretical model of the TOAD structured optical switch are introduced. The influence of the injection current on the shape and phase difference of the sampling window is analyzed in detail, and the window variation of TOAD structured optical switch is studied.