Gc. Bhar et al., Generation of ultraviolet radiation with wide angular tolerance in cesium lithium borate crystal, PRAMANA-J P, 55(3), 2000, pp. 413-421
Tangential phase-matching has been realised in cesium lithium berate (CLBO)
crystal for the first time for the generation of fourth harmonic (266 nm)
of Nd:YAG and third harmonic (226.7 nm) of a dye laser radiation by second
harmonic generation and sum-frequency mixing with the angular tolerance as
large as 22 mrad and 21 mrad respectively, over one of the interacting beam
s. An energy conversion efficiency of 15% for fourth harmonic generation is
obtained with a 5.5 mm thick crystal and with the average pump powers only
170 and 70 mW. A set of Sellmeier dispersion equations for the CLBO crysta
l have also been formulated.