Huang Bin, Wang Qingjun, Jiang Guobao, Yi Jun, Tang Pinghua, Liu Jun, Zhao Chujun, Luo Hailu, Wen Shuangchun
Opt Express. 2017 Jan 9;25(1):30-38. doi: 10.1364/OE.25.000030.
We report a wavelength-locked cladding-pumped ytterbium-doped fiber laser that can simultaneously emit radially and azimuthally polarized beams based on Pancharatnam-Berry phase optical elements. Multi-wavelength free running operation of the radially and azimuthally polarized laser beams can be switched to a single-wavelength one assisted by volume Bragg grating, with wavelength locked at around 1053.4 nm and spectral linewidth of 0.06 nm (FWHW). By rotating the glan-taylor polarizer, we can obtain switchable radially and azimuthally polarized beams output. The radially and azimuthally polarized beams mode purity can maintain 97.3% and 96.3% at maximum output power, and the polarization extinction ratio (PER) can reach 97.8% and 95.9% for the radially and azimuthally polarized laser, respectively.
我们报道了一种波长锁定的包层泵浦掺镱光纤激光器，该激光器基于潘查拉特纳姆 - 贝里相位光学元件，能够同时发射径向偏振光束和方位角偏振光束。径向偏振和方位角偏振激光束的多波长自由运转操作可通过体布拉格光栅辅助切换为单波长操作，波长锁定在1053.4nm左右，光谱线宽为0.06nm（半高宽）。通过旋转格兰 - 泰勒偏振器，我们可以获得可切换的径向偏振和方位角偏振光束输出。在最大输出功率下，径向偏振和方位角偏振光束的模式纯度分别可保持97.3%和96.3%，径向偏振和方位角偏振激光器的偏振消光比（PER）分别可达97.8%和95.9%。
