Qixin Zhu, Jianhong Shi, Huixuan Hu, Jie Wu, Zhiyuan Wang, Yinbing Xing, Jinyan Li, Dapeng Yan, Cheng Li
An LP11 -mode output all-fiber laser was presented, utilizing long-period fiber gratings (LPFGs) and polarization-maintaining optical fiber (PMF). The LPFG was designed and fabricated, achieving a 90.56% efficiency in LP01 to LP11 mode conversion. Furthermore, the transmission stability of LP11 -mode in the PMF was also explored, with the spatial mode overlap ratio exceeding 0.95. Ultimately, the high-power polarization-maintaining (PM) fiber laser, capable of the LP11 mode output, was constructed, with the output power of 600 W and the beam quality M2 of 2...
March 11, 2024: Optics Express