Chinese Optics Letters, 2007, 5 (4): 221, Published Online: Jun. 26, 2007
High power low-order modes operation of a multimode fiber laser Download: 779次
Abstract
Coiling technique is used to suppress high-order modes of a large mode area (LMA) double clad multimode fiber. Output powers and beam quality factors M2 are measured under two different coiling radii. 217 W with M2 of 2.96 can be obtained for coiling radius of 165 mm and 160 W with M2 of 1.38 for 52 mm. The corresponding slope efficiencies are 60% and 48%. With smaller coiling radius, the brightness is 3.4 times as high as that of the larger one.
Libo Li, Qihong Lou, Jun Zhou, Jingxing Dong, Yunrong Wei, Jinyan Li. High power low-order modes operation of a multimode fiber laser[J]. Chinese Optics Letters, 2007, 5(4): 221.