Deterioration of laser beam quality caused by cladding modes in fusion splices of double-cladding fibers

作者：Yan Ping; Fu Chen^*; Xiao Qirong; Sun Junyi; Li Dan; Zhang Haitao; Gong Mali

来源：Applied Physics B: Lasers and Optics , 2015, 120(4): 623-629.

DOI：10.1007/s00340-015-6174-1

In this study, the influences of cladding modes on double-cladding fiber (DCF) laser beam quality are discussed for the first time. Based on mode-coupling theory and beam propagation method, the formations of DCF cladding modes and mixed fields of guided modes and cladding modes are discussed and illustrated under the conditions of core misalignment in fiber fusion splice process. Further, the deterioration of laser beam quality caused by the existence of cladding modes is also carried out. Simulation results show in good accordance with the experiment of M (2) factor measurement of fiber lasers with cladding modes.

• 出版日期2015-9
• 单位清华大学