Chinese Optics Letters, 2007, 5 (s1): 53, Published Online: Jul. 15, 2007
High brightness laser output with single-fiber-coupled laser diode array Download: 567次
140.2010 Diode laser arrays 140.3300 Laser beam shaping 140.3510 Lasers, fiber 060.1810 Buffers, couplers, routers,switches, and multiplexers 270.3430 Laser theory
Abstract
In order to get high efficiency and high brightness laser output with single fiber coupled laser diode array, two laser diode array bars which have 40-W continuous wave (CW) output power at 980-nm wavelength are used in the experiment. The laser diode bars are collimated by two pieces of cylindrical micro lenses in the fast axis direction, and in the slow axis direction step mirrors are used to divide the beams of light to shape the output beam symmetrically. A piece of polarizing beam splitter cube is used to combine the two shaped beams. The focused output beam is coupled into a multimode fiber. More than 55-W output power is obtained from the fiber with core diameter of 400 microns and numerical aperture of 0.22, the total coupling efficiency is about 70% and the brightness is up to 10^(9) level.
Peifeng Wang, Zhongwei Fan, Gang Niu, Zhaohui Shi, Jianfeng Cui, Jing Zhang, Ying Zhang, Bo Pei, Peng Wang. High brightness laser output with single-fiber-coupled laser diode array[J]. Chinese Optics Letters, 2007, 5(s1): 53.