Wu Peng, Zhou Qiang, Wang Yueqi, Deng Guangwei, Fan Yunru, Shen Si, Xu Qiang, Wang Yunxiang, Song Haizhi, Wang You
Appl Opt. 2019 Jul 1;58(19):5143-5147. doi: 10.1364/AO.58.005143.
We have experimentally demonstrated a wavelength-tunable passively mode-locked all-fiber laser at 1.5 μm wavelength by using an erbium-doped fiber amplifier, a fiber-pigtailed semiconductor saturable absorber mirror, and a tunable birefringence Sagnac filter. In our work, by properly setting the polarization state of the propagating light in the birefringence Sagnac filter, the mode-locked lasing wavelength can be continuously tuned from 1544.1 to 1560.8 nm, corresponding to a tuning range of 16.7 nm. At a central wavelength of 1548.5 nm, the fiber laser delivers pulses as short as 713.2 fs with a repetition rate of 4.65 MHz, a 3 dB bandwidth of 5.7 nm, and an average output power of 4.86 mW. Our results show that such a mode-locked all-fiber laser has great potential in applications in nonlinear optics at the 1.5 μm band.
我们通过使用掺铒光纤放大器、光纤尾纤半导体可饱和吸收镜和可调谐双折射萨格纳克滤波器，在实验上演示了一种波长可调谐的被动锁模全光纤激光器，其波长为1.5μm。在我们的工作中，通过适当地设置双折射萨格纳克滤波器中传播光的偏振态，锁模激光波长可以在1544.1至1560.8nm范围内连续调谐，对应调谐范围为16.7nm。在中心波长1548.5nm处，该光纤激光器输出的脉冲最短可达713.2fs，重复频率为4.65MHz，3dB带宽为5.7nm，平均输出功率为4.86mW。我们的结果表明，这种锁模全光纤激光器在1.5μm波段的非线性光学应用中具有巨大潜力。
