Abstract

We present a multimode one-dimensional model of nanosecond optical parametric oscillation (OPO) and apply it to the modelling of an experimental doubly-resonant KTP OPO with double-passing of the pump described in Ref. 1. Assuming a single-mode driving pump at frequency ω_p0, signal modes are generated at ω_s1 <ω_s2<ω_s3 <… along with the corresponding idler ones at ω₁ > ω_i2 > ω_i3 >… For the first time to our knowledge, we show the effects of cross talk between the different signal-idler pairs generated, creating "pump" at side-frequencies (ω_p−1 =ω_s1+ω_i2 and ω_p+1 =ω_s2 + ω_i1 when considering only the two signal-idler pairs indexed 1 and 2).

© 1996 Optical Society of America