适用于金属薄板焊接的柔性光纤耦合半导体激光加工光源

摘要

研制了一种单光纤耦合的柔性半导体激光加工光源,该光源由20个传导热沉封装的激光列阵以线阵合束方式耦合而成,在大通道工业水冷条件下,从600 μm芯径、NA为0.2的光纤中连续输出907 W功率,输出光束质量为47 mm·mrad,最终达到工件表面的功率密度为3.21×105 W/cm2,最大插头效率达39％.该激光光源具有直接应用在金属薄板焊接的潜力.%A high power fiber-coupled flexible source is fabracated in which 20 conduction cooled diode laser bars were intergrated in manner of linear array coupling.Under the macrochannel cooling with industrial water,a CW output power of 907 W,a beam parameter product of 47 mm · mrad,an optical power density of 3.21 × 105 W/cm2 and a maximum wall-plug efficiency of 39％ on the work piece are demonstrated from a 600 μm,NA 0.2 fiber.This source has a great potential to be directly adapted in materials processing,especially in metal sheet welding.