High-power dual-wavelength laser with disordered Nd:CNGG crystals.

State Key Laboratory of Crystal Materials and Institute of Crystal Materials, Shandong University, Jinan, China.
Optics Letters (Impact Factor: 3.18). 02/2009; 34(2):151-3. DOI: 10.1364/OL.34.000151
Source: PubMed

ABSTRACT We demonstrate the high-power dual-wavelength laser output with disordered Nd:CNGG laser crystals. Continuous-wave output power of 4.03 W was obtained under the incident pump power of 15.62 W. In the passively Q-switched operation, the shortest pulse width, largest pulse energy, and highest peak power were achieved to be 12.9 ns, 173.16 microJ, and 12.3 kW, respectively, with Cr(4+):YAG crystals as the saturable absorbers. By spectral analysis, the output lasers were found to have dual wavelengths. We believed that the passively Q-switched dual-wavelength laser should be possible to be used as a source for the generation of terahertz radiation.