Hangyu Peng

CW 50W/M2 = 10.9 diode laser source by spectral beam combining based on a transmission grating

An external cavity structure based on the -1st transmission grating is introduced to spectral beam combining a 970 nm diode laser bar. A CW output power of 50.8 W, an electro-optical conversion efficiency of 45%, a spectral beam combining efficiency of 90.2% and a holistic M(2) value of 10.9 are achieved. This shows a way for a diode laser source with several KW power and diffraction-limited beam quality at the same time.

Optimization of an intracavity Q-switched solid-state second order Raman laser

In this paper, the model of an intracavity Q-switched second order Raman laser is established, the characteristics of the output 2nd Stokes are simulated. The dynamic balance mechanism among intracavity conversion rates of stimulated emission, first order Raman and second order Raman is obtained. Finally, optimization solutions for increasing output 2nd Stokes pulse energy are proposed.

Hundred-watt diode laser source by spectral beam combining

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.