Honzatko Pavel, Baravets Yauhen, Myakalwar Ashwin Kumar
Opt Lett. 2018 Mar 15;43(6):1339-1342. doi: 10.1364/OL.43.001339.
We present a broadly tunable single-frequency ytterbium-doped fiber laser. Its broadband tunability is made possible by low resonator losses. The wavelength is determined by a grating filter, while the single-frequency regime is achieved by filtering the longitudinal modes in a fiber ring resonance filter. We obtained a tuning range from 1023 nm to 1107 nm. A feedback loop driving a fiber stretcher actuated by a piezo-element prevents mode hopping. Based on the coherent delayed self-heterodyne interferometry, the laser linewidth is estimated to be 600 Hz with feedback open and 11.7 kHz with feedback closed.
我们展示了一种具有广泛可调谐性的单频掺镱光纤激光器。其宽带可调谐性得益于低谐振器损耗得以实现。波长由光栅滤波器确定，而单频状态则通过在光纤环形谐振滤波器中对纵向模式进行滤波来实现。我们获得了从1023纳米到1107纳米的调谐范围。一个由压电元件驱动光纤拉伸器的反馈回路可防止模式跳变。基于相干延迟自外差干涉测量法，估计在反馈打开时激光线宽为600赫兹，反馈关闭时为11.7千赫兹。
