Dual-wavelength Nd:LGGG laser intracavity pumped simultaneous OPO and SRS processes in single KTP

Simultaneous optical parametric oscillation (OPO) and stimulated Raman scattering (SRS) in a single KTiOPO₄ (KTP) intracavity pumped by a dual-wavelength Nd:LGGG laser were demonstrated for the first time, to the best of our knowledge. A maximum output power for the signal beam was 448 mW, while for the Stokes radiations it was 40 mW, corresponding to an overall conversion efficiency of about 4.65%. The shortest pulse durations for OPO and SRS waves were directly measured to be 850 ps and 1.526 ns, respectively. The highest peak power of 30.6 kW and the pulse energy of 26 μJ for the signal beam were also obtained. A set of coupled rate equations for the dual-wavelength pumped OPO and SRS was also established. The numerical solutions fit with the experimental results.