Frequency-stable operation of a diode-pumped continuous-wave optical parametric oscillator (OPO) of RbTiOAsO4 is demonstrated. Piezoelectric and fast electro-optic control of the optical length of the two-mirror OPO cavity (resonant for the pump and the idler waves) compensates for thermal changes in the refractive index of the OPO crystal (induced by absorption of pump light) and acoustic perturbations of the cavity length. Pumped by 405mW of the 810-nm output of a GaAlAs masterf-oscillator-tapered-amplifier diode laser system, the OPO generates a power-stable single-frequency signal wave at 1.24µm with an output of 84mW and a spectral bandwidth of less than 10MHz.
© 1997 Optical Society of America
M. Scheidt, B. Beier, K.-J. Boller, and R. Wallenstein, "Frequency-stable operation of a diode-pumped continuous-wave RbTiOAsO4 optical parametric oscillator," Opt. Lett. 22, 1287-1289 (1997)