背向光注入增益匱乏調製鎖模光放大器光纖雷射環動態行為研究

Dynamics of Optical Backward Injection Induced Gain-Depletion Modulation and Mode-Locking in Semiconductor Optical Amplifier Fiber Laser

林恭如(Gong-Ru Lin) ； 廖育聖(Yu-Sheng Liao) ； 游昆潔(Kun-Chieh Yu)

《科儀新知》 158期 (2007/06) Pp. 30-37

https://doi.org/10.29662/IT.200706.0004

摘要

從理論和實驗上展示了使用弦波調變或數位編碼DFBLD注入，利用消耗增益達到鎖模的半導體光放大器為基礎之環型雷射(SOAFL)。在消耗增益的影響中，鎖模波形、脈衝寬度、脈衝形狀和SOAFL的功率都在理論模型中被證實。弦波調製的SOAFL可以產生脈衝寬度最短為12ps的鎖模輸出。利用調整數位編碼的光訊號之佔空週期反向注入SOAFL，對於達到理想鎖模的SOAFL的最佳增益消耗時間為400-600皮秒。

並列摘要

The optical gain-depletion-induced mode-locking dynamics of a semiconductor optical-amplifier-based fiber ring laser (SOAFL) backward injected by a purely sinusoidally modulated or digitally encoded distributed feedback laser diode are theoretically and experimentally demonstrated. The effect of gain depletion and waveform on the mode-locked pulse width, pulse shape, and power of the SOAFL are interpreted from theoretical simulations. The shortest pulse width of 12 ps can be generated from an optically sinusoidal-wave-modulated SOAFL. By backward injecting the SOAFL with a digitally encoded optical signal of adjustable duty cycle, one can observe the optimized gain depletion time of 400-600 ps required for mode locking the SOAFL.