Effective suppression of mode distortion induced by stimulated Raman scattering in high-power fiber amplifiers

• DOI: 10.1017/hpl.2021.13
• Publication Date: 2021-05-14T11:54:30Z
• Authors: Wei Gao; Wenhui Fan; Pei Ju; Gang Li; Yanpeng Zhang; Aifeng He; Qi Gao; Zhe Li
• Keywords: Distortion (music)

Abstract Mode distortion induced by stimulated Raman scattering (SRS) has become a new obstacle for the further development of high-power fiber lasers with high beam quality. Here, an approach effective suppression SRS-induced mode in amplifiers been demonstrated experimentally adjusting seed power (output source) and forward feedback coefficient rear port source. It is shown that threshold can be increased significantly reducing or coefficient. Moreover, it also found extremely sensitive to value from port. The influence on attributed fact plays important role length gain amplifier. enhanced SRS configuration because end surface together amplifier constitutes half-opening cavity. This will very helpful develop