Non-collinear sum-frequency generation of femtosecond pulses in a micro-structured beta-BaB2O4 crystal

作者：Romero Carolina^*; Vazquez de Aldana Javier R; Mendez Cruz; Roso Luis

来源：Optics Express, 2008, 16(22): 18109-18117.

DOI：10.1364/OE.16.018109

Sum-frequency generation of femtosecond pulses by noncollinear phase matching in a micro-structured beta-BaB2O4 crystal has been investigated. A 1D relief grating was recorded in the surface of a beta-BaB2O4 crystal by direct irradiation with femtosecond pulses. Groove dimensions of 1 mu m width and 200 nm depth were obtained for the recording parameters. This micro-structured crystal was used for generating ultraviolet pulses (265 nm) by noncollinear sum-frequency generation of the fundamental and the second harmonic of a Ti:Sapphire femtosecond laser system. Effective group-velocity matching between the incident pulses can be achieved for certain noncollinear processes in a compact way. The application of such device to intensity cross-correlation measurements of the second-harmonic pulse was shown.

• 出版日期2008-10-27