Optimized blue light generation in optically contacted walk-off compensated RbTiOAsO sub(4) and KTiOP sub(1-y)As sub(y)O sub(4)

• Published in: Optics communications Vol. 161; no. 4; pp. 359 - 369
• Main Authors: Feve, J P, Zondy, J J, Boulanger, B, Bonnenberger, R, Cabirol, X, Menaert, B, Marnier, G
• Format: Journal Article
• Language: English
• Published: 01.01.1999
• ISSN: 0030-4018

We study type II 1.32 mu m second harmonic generation (SHG) in a RbTiOAsO sub(4) optically contacted walk-off compensated device. The reduction of the effective walk-off angle by a factor of 3.7 with respect to KTiOPO sub(4) for the same interaction leads to an enhancement by a factor of 10 of the conversion efficiency. A model is proposed for both type I and type II SHG in such a structure. The angular tuning curve is a multi-peaked one, as predicted by the model. The enhancement of the SHG conversion efficiency allows us to optimize the generation of blue laser light at 440 nm: a specially designed KTiOP sub(0.98)As sub(0.02)O sub(4) solid solution crystal achieves angular non-critical phase matching at room temperature for type II sum frequency generation 1.32 mu m+0.66 mu m arrow right 0.44 mu m.