The parametric generation of broad spectral bandwidths by the use of suitable phase-matching geometries is reported. Greater than 100-nm simultaneous bandwidth in the visible is generated in a collimated signal beam from a novel, noncollinear phase-matching geometry in a β-barium borate optical parametric oscillator, which is pumped by the collimated output of a Q -switched and frequency-tripled Nd:YAG laser. Dispersive cavity tuning of the optical parametric oscillator by use of a rotatable Littrow-mounted grating, with a static crystal and pump configuration, is also described. A tunable bandwidth of >100 nm is also demonstrated.
© 1997 Optical Society of America
Jian Wang, Malcolm H. Dunn, and Cameron F. Rae, "Polychromatic optical parametric generation by simultaneous phase matching over a large spectral bandwidth," Opt. Lett. 22, 763-765 (1997)