Non-linear optics; ultraviolet radiation; tangential phase-matching; Sellmeier dispersion
Tangential phase-matching has been realised in cesium lithium borate (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 beams. 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 crystal have also been formulated.
Volume 89 | Issue 5
Guest Editors: Anurag Srivastava, C. S. Praveen,
H. S. Tewari