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Proceedings Paper

Comparative evaluation of GdCOB and YCOB nonlinear optical properties in principal and out of principal plane configurations for the 1064 nm Nd:YAG laser frequency conversion
Author(s): Gerard Aka; Frederic Mougel; Denis Pelenc; Bernard Ferrand; D. Vivien
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Paper Abstract

Large and good optical quality crystal of YCOB and GdCOB were grown from the melt by Czochralski technique. Typically they are 50 mm in diameter and 150 long. We have used the Fresnel formula to calculate GdCOB and YCOB phase matching angle loci for SHG of 1064 nm radiation, in type I and type II configurations. We have used femtosecond broadband pulses to measure the phase matching angels in type I SHG for the three principal planes of YCOB and compared them to the computed values. Different crystals of YCOB and GdCOB were cut and polished in principal plane configurations for type I and type II interactions. Moreover, crystal were also cut by using some SHG configurations selected out of principal planes. All these crystal were used to evaluate in the same conditions, the SHG conversion efficiency of Q-switched Nd:YAG laser in relation with the angular acceptance, walk- off angle and the non-linear coefficients which were also determined. The type II configurations give the highest angular acceptance. The high damage threshold and the relatively large angular acceptance of YCOB and GdCOB led to efficiency greater than 50 percent.

Paper Details

Date Published: 23 March 2000
PDF: 7 pages
Proc. SPIE 3928, Nonlinear Materials, Devices, and Applications, (23 March 2000); doi: 10.1117/12.379907
Show Author Affiliations
Gerard Aka, ENSCP (France)
Frederic Mougel, ENSCP and CRISMATEC (France)
Denis Pelenc, CRISMATEC (France)
Bernard Ferrand, CEA-LETI (France)
D. Vivien, ENSCP (France)


Published in SPIE Proceedings Vol. 3928:
Nonlinear Materials, Devices, and Applications
Jeffrey W. Pierce, Editor(s)

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