BANDWIDTH NARROWING OF AN ALL-SOLID-STATE OPTICAL PARAMETRIC OSCILLATOR AMPLIFIER SYSTEM

An all-solid-state narrow-bandwidth tunable near-infrared KTP optical parametric oscillator amplifier (OPOA) is presented. The bandwidth at 960 nn was reduced from the free running mode (> 100 GHz) to less than 150 MHz by the simultaneous injection seeding of the pump laser and t he OPOA, which is close to the Fourier transform limit of the 4 ns out put pulses. The OPOA has a potential tunability of over 60 nn from 915 -975 nm determined by its external cavity grating tuned diode seed las er.