Noncollinear optical parametric amplification in lithium triborate seeded by a cw Ti:sapphire laser

Abstract

Experimental investigations of a type-I noncollinear phase-matched optical parametric amplification based on lithium triborate, which was pumped by a 5-ns second-harmonic pulses from a Q-switched Nd:YAG, seeded by a cw Ti:sapphire laser at 800 nm , was presented. The experiments generated 2-ns signal output pulses at 800 nm , the maximum signal output pulse energy reached 19 μJ , the corresponding parametric gain was 44 dB . Furthermore, the experiments demonstrate that the 65 nm -FWHM parametric fluorescence gain spectrum could also be observed. A quantitative account of the ultrabroadband parametric fluorescence gain spectrum was given with our theory. The experimental measurements are in agreement with theoretical calculations.