波长范围为1065至1090纳米的1千瓦全光纤化窄线宽保偏光纤放大器。

>1 kW all-fiberized narrow-linewidth polarization-maintained fiber amplifiers with wavelength spanning from 1065 to 1090 nm.

作者信息

Liu Yakun, Su Rongtao, Ma Pengfei, Wang Xiaolin, Zhang Hanwei, Zhou Pu, Si Lei

出版信息

Appl Opt. 2017 May 10;56(14):4213-4218. doi: 10.1364/AO.56.004213.

DOI:10.1364/AO.56.004213

Abstract

We demonstrate all-fiberized, kilowatt-level, narrow-linewidth, Yb-doped and polarization-maintained (PM) amplifiers with a central wavelength spanning from 1065 to 1090 nm. The laser system consists of a tunable single-frequency laser seed and multistage PM fiber amplifiers in the master oscillator power amplifier configuration. The stimulated Brillouin scattering effect is suppressed by phase modulation based on a white noise source. The linewidth (Δλ∼0.12 nm at 1 kW), polarization extinction ratio (PER>13 dB) and beam quality (M∼1.2) are well maintained during the power scaling process, and the slope efficiency of this system is 70.8%.

摘要

我们展示了全光纤化、千瓦级、窄线宽、掺镱且保偏（PM）的放大器，其中心波长范围为1065至1090纳米。该激光系统由一个可调谐单频激光种子源和处于主振荡功率放大器配置的多级保偏光纤放大器组成。基于白噪声源的相位调制抑制了受激布里渊散射效应。在功率放大过程中，线宽（1千瓦时光谱带宽Δλ约为0.12纳米）、偏振消光比（PER>13分贝）和光束质量（M约为1.2）均得到良好保持，且该系统的斜率效率为70.8%。