Chinese Optics Letters, 2014, 12 (10): 101402, Published Online: Sep. 28, 2014
Theoretical analysis of lens array for uniform irradiation on target in multimode fiber lasers Download: 556次
140.3298 Laser beam combining 140.3300 Laser beam shaping 140.3510 Lasers, fiber 260.1960 Diffraction theory
Abstract
We propose and demonstrate a scheme to smooth and shape the on-target patterns in multimode fiber lasers, which includes expanding–collimating system and lens array (LA). A smooth pattern with flat-top and sharp-edge profiles can be obtained with the irradiation nonuniformity decreasing significantly. We analyze the effects of the parameters such as defocus distance, the tilt angles, the number of the incident fiber lasers, and the diffraction-weakened LA on the uniformity irradiation of target by numerical simulations.
Jian Lin, Lixin Xu, Shengbo Wang, Haixiao Han. Theoretical analysis of lens array for uniform irradiation on target in multimode fiber lasers[J]. Chinese Optics Letters, 2014, 12(10): 101402.