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 12 ps 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

The optical gain-depletion-induced mode-locking dynamics of a semiconductor optical-amplifierbased 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.