Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China.
Opt Lett. 2010 Nov 1;35(21):3574-6. doi: 10.1364/OL.35.003574.
We report, for the first time to our knowledge, a radially polarized and passively Q-switched Yb-doped fiber laser. By using a Cr(4+):YAG crystal as a saturable absorber and a photonic crystal grating as a polarization mirror, a radially polarized pulse is produced, which has 202 W of peak power, 75 ns duration, and ~92% polarization purity at a 56.6 kHz repetition rate. The Q-switched pulse with radial polarization from the fiber laser would facilitate numerous applications.
我们首次报道了一种径向偏振和被动调 Q 的掺镱光纤激光器。通过使用 Cr(4+):YAG 晶体作为可饱和吸收体和光子晶体光栅作为偏振反射镜,产生了峰值功率为 202 W、脉宽为 75 ns、偏振纯度约为 92%的径向偏振脉冲,在 56.6 kHz 的重复率下工作。这种具有径向偏振的光纤激光器的调 Q 脉冲将促进许多应用。