基于泵浦调制技术的调Q锁模脉冲可控输出

Controllable generation of Q-switching mode-locking pulse with pump modulation technique

摘要:

本文通过在耗散孤子锁模光纤激光器的泵浦驱动电流上加载调制信号,实现了可控的调Q锁模脉冲输出。当激光器泵浦驱动电流不加任何调制信号时,激光器输出稳定的耗散孤子脉冲。在泵浦驱动电流上加载矩形波调制信号,可以实现调Q锁模脉冲输出。当保持其他参数不变,将调制信号幅度从0.1 V升高到0.5 V时,调Q脉冲包络可以从21.1 kHz升高到30.4 kHz。将调制信号占空比从90%升高到98%时,调Q脉冲包络可以从15.1 kHz升高到21.9 kHz。最后,分析了调Q锁模脉冲产生的机理。本研究为实现可控的调Q锁模脉冲输出提供了一个行之有效的方法。

Abstract:

Controllable Q-switching mode-locking pulse was delivered from a dissipative soliton fiber laser using pump modulation technique. The stable dissipative soliton pulse was first realized when the pump driver current was without modulation signal. Controllable Q-switching mode-locking pulse was generated when the modulation square signal was injected into the pump driver current. When the intensity of the modulation signal was increased from 0.1 V to 0.9 V, the frequency of the pulse envelope was changed from 21.1 kHz to 30.4 kHz. While the duty cycle of the modulation was changed from 90% to 98%, the frequency of the pulse envelope was changed from 15.1 kHz to 21.9 kHz. The generation mechanism of the Q-switching mode-locking pulse have been analyzed theoretically. The work provides an effective way to realize controllable Q-switching mode-locking pulse.0.25s.This work provides a new scheme for realizing efficient and convenient automatic mode locking for fiber laser.