| Summary: | 碩士 === 國立臺灣大學 === 電信工程學研究所 === 90 === By using the time-domain traveling-wave model, we simulate the dynamics of optical pulse propagation in a multimode-interference semiconductor for optical amplifier (MMI SOA) in which the gain saturation and gain dispersion effects are important. Through appropriate designs for single-pulse propagation and two-pulse collision, the effects are numerically investigated. It is found that the compression of pulse, which is due to gain saturation, can be slowed down by the effect of gain dispersion. For the application to wavelength conversion in optical communication, we improve the existent coupler structure and redesign our MMI SOA. By varying the parameters of the MMI SOA in simulation, we analyze the quality of the output signal and investigate the response rate of our device. The dynamic behavior (frequency chirp) of the output signal and the effect of noise are also numerically simulated.
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