Huang Long, Lai Wenchang, Ma Pengfei, Wang Jin, Su Rongtao, Ma Yanxing, Li Can, Zhi Dong, Zhou Pu
Opt Lett. 2020 Jul 15;45(14):4001-4004. doi: 10.1364/OL.393051.
The all-fiber high-power linearly polarized single-frequency fiber laser based on the polarization-maintaining tapered Yb-doped fiber (T-YDF) is systematically studied. As a result, a 300 W-level stable output with linear polarization and nearly diffraction-limited beam quality is demonstrated. In particular, the overall properties of the transverse mode instability (MI) effect in such a single-frequency laser system are discussed in detail for the first time, to the best of our knowledge, including temporal, frequency, polarization, and spatial domains. Furthermore, the beam pointing error taking the MI effect into account is investigated. Theoretical analyses covering both stimulated Brillouin scattering and the MI effects reveal the great potential of the T-YDF for further power scaling as well.
对基于保偏锥形掺镱光纤（T-YDF）的全光纤高功率线性偏振单频光纤激光器进行了系统研究。结果表明，该激光器能够实现300W级的稳定输出，具有线性偏振和接近衍射极限的光束质量。据我们所知，首次详细讨论了这种单频激光系统中横向模式不稳定性（MI）效应的整体特性，包括时域、频域、偏振域和空间域。此外，还研究了考虑MI效应时的光束指向误差。涵盖受激布里渊散射和MI效应的理论分析也揭示了T-YDF在进一步功率扩展方面的巨大潜力。
