應用振幅調變和相位調變八字形光纖鎖模雷射於高速脈衝信號傳輸之研究

Abstract

本文分別提出高速振幅調變和調幅信號注入式相位調變及調頻注入式相位調變等三型鎖模雷射應用於光纖通訊傳輸系統之研究，於高速雷射光源之共振腔部份，是分別利用一個振幅調變器和一個相位調變器，注入外加調變訊號，使共振腔內之縱模產生建設性干涉，進而達到以低頻外加調變訊號，倍增其光訊號之重複率的諧波鎖模雷射。此外，我們微調外加調變訊號，以分析外加調變訊號對脈衝寬度、脈衝重複率、脈衝抖動、週期、上升時間和下降時間等因數的影響。於傳輸系統方面，我們應用於光纖通訊系統之整合。在光纖長距離傳輸部分，我們以長距離單模光纖搭配色散補償光纖，使色散得以補償，並以摻鉺光纖放大器補償長距離傳輸的損失，於此系統，我們改變模擬與理論參數，以眼圖來評估我們所設計不同的系統適合應用的條件。In this thesis, we propose a fiber-satellite integration using a high speed AM fed amplitude-modulated mode-locked and AM/PM fed phase-modulated mode-locked figure-eight laser apply to transmission system. In the cavity of high speed laser source, we utilize an amplitude modulator and phase modulator to inject additive modulation signal respectively. The modulation signal can let the longitudinal mode in cavity produce constructive interference, and then, achieve small modulation signal to excite harmonic and rational mode-locked laser in high repetition rate. After producing high speed mode-locked laser, we do detuning the modulation parameters to analyze the effect of repetition rate, pulsewidth, rise time, falling time and jitter. In optical transmission systems, we consider the 100 km long single mode fiber is used in the fiber transmission analysis. We also insert the dispersion-compensated fiber to compensate chromatic dispersion, and analyse eye pattern with various transmission system, we can evaluate proper application for our designed system.