Author:
Fu Shiyao,Hai Lan,Zhang Zhichao,Gao Chunqing
Abstract
A four-pass Er:YAG vortex master-oscillator-power-amplification (MOPA) system enabling power amplification of 1.6 μm single-frequency high-order vortex beams is demonstrated. The gain up to 2.36 with no mode purity and linewidth loss, is achieved.