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得益于高功率尾纤输出半导体激光器和非保偏光纤及器件的发展,随机偏振光纤激光在过去十年内输出功率得到了极大的提升,但国内尚无高功率非保偏大模场光纤放大器偏振控制的实验报道。本研究采用主动偏振控制方式,成功实现了964 W线偏振光纤激光输出,实现最大功率时消光比为14.5dB,3dB线宽约为0.07nm,放大过程中无明显光谱展宽,光束质量因子M2小于1.2。激光器结构如图1(a)所示,采用相位调制器对10mW的1064nm单频线偏激光进行光谱展宽,然后进行偏振态调制及两
Due to the development of high-power pigtail output semiconductor lasers and non-polarization maintaining fibers and devices, the output power of random polarized fiber lasers has been greatly improved in the past ten years. However, there is no high-power non-polarization maintaining large mode field fiber Amplifier Polarization Control Experiment Report. In this study, the active polarization control method was used to successfully achieve a 964 W linearly polarized fiber laser output. The maximum extinction ratio was 14.5 dB and the 3dB linewidth was about 0.07 nm. There was no obvious spectral broadening in the amplification process and the beam quality factor M2 was less than 1.2. The laser structure shown in Figure 1 (a), the use of phase modulator 10mW 1064nm single-frequency line laser to broaden the spectrum, and then the polarization state modulation and two