Cuadrado-Laborde C, Diez A, Delgado-Pinar M, Cruz J L, Andrés M V
Departamento de Física Aplicada y Electromagnetismo, ICMUV, Universidad de Valencia, Valencia, Spain.
Opt Lett. 2009 Apr 1;34(7):1111-3. doi: 10.1364/ol.34.001111.
Active mode locking of an erbium-doped all-fiber laser with a Bragg-grating-based acousto-optic modulator is demonstrated. The fiber Bragg grating was acoustically modulated by a standing longitudinal elastic wave, which periodically modulates the sidebands at twice the acoustic frequency. The laser has a Fabry-Perot configuration in which cavity loss modulation is achieved by tuning the output fiber Bragg grating to one of the acoustically induced sidebands. Optical pulses at 9 MHz repetition rate, 120 mW peak power, and 780 ps temporal width were obtained. The output results to be stable and has a timing jitter below 40 ps. The measured linewidth, 2.8 pm, demonstrates that these pulses are transform limited.
展示了一种基于布拉格光栅声光调制器的掺铒全光纤激光器的主动锁模。光纤布拉格光栅由驻立纵向弹性波进行声学调制，该弹性波以两倍声学频率周期性地调制边带。该激光器具有法布里 - 珀罗结构，其中通过将输出光纤布拉格光栅调谐到声学诱导边带之一来实现腔损耗调制。获得了重复频率为9 MHz、峰值功率为120 mW、时间宽度为780 ps的光脉冲。输出结果稳定，定时抖动低于40 ps。测得的线宽为2.8 pm，表明这些脉冲是变换极限的。
