Diode-pumped Q-switched Nd:YAG-KGW Raman laser operating in two-color modulation.

We report a diode-pumped Q-switched Nd:YAG-KGW Raman laser operating in two-color modulation. The output wavelength can be switched between 1159nm and 1177nm using an E-O switch, and the Raman output modulated in spectra-time domains was achieved. Raman pulse energy up to 114mJ at 1177nm and 98mJ at 1159nm were obtained respectively, corresponding to an overall Diode-Stokes conversion efficiency of 15.3% at 1177nm and 13.2% at 1159nm.