Hundred-watt diode laser source by spectral beam combining

Abstract

A diode laser source with a continuous wavelength (CW) power of 106 W and the beam quality M 2 of 14.6 is demonstrated by spectrum beam combining (SBC) of three 800 nm LDAs. With the help of relay optics, a wavelength interval of 0.21 nm and a whole spectrum span of 13.9 nm are achieved, which is almost 10 times narrower than those of the structure without the relay optics. This presents a method to obtain a high power and high beam quality SBC laser source with a narrow spectrum.

High-power direct diode laser output by spectral beam combining

“…Xiao et al achieved a 1 kW continuous wave (CW) all-fiber laser pumped by seven 200 W 91× nm fiber-coupled (200 µm/NA 0.22) SBC diode stacks [4]. Zhang et al presented a new SBC scheme with transmission grating, and realized a hundred-watt class SBC output [5,6]. Wu et al proposed a theoretical model for SBC, and simulated and discussed the beam properties and combining efficiency in detail [7].…”