880 nm high-power fiber-coupled diode laser module for active illumination

Near-infrared laser diode arrays (LDA) are usually utilized as illuminated source for active laser illumination technology. The severe red exposure of 808nm LDA deteriorates its potential for military application. Due to the low response of CMOS to light beyond 900nm, LDA with 880nm wavelength is a good candidate for active laser illumination. The 880 nm LDA has been chosen as a new type of laser active illumination source. As the beam of the high-power LDA has large divergence and uneveness, the 880 nm LDA can not be used directly for active illumination. Thus high power 880 nm fiber-coupled diode lasers have been developed with a pair of micro step-mirrors for beam shaping. As a result, output power about 44.9 W of the fiber-coupled laser diode module is achieved, and electro-optical con