Experimental and theoretical investigation of a cryogenically cooled Nd:YAG laser with dual-wavelength at 946 and 1061 nm

A diode-end-pumped cryogenically cooled Nd:YAG laser is demonstrated with dual-wavelengths at 946 nm and 1061 nm. As temperature varies from 300 K to 190 K, a transition occur from single-wavelength at 946 nm to dual-wavelength at 946 nm and 1061 nm. Only the line at 1061 nm oscillated for the temperature less than 180 K. Moreover, a theoretical simulation of oscillation condition at cryogenic temperatures is implemented, leading a deep insight into the physical mechanism of dual-wavelength generation.