Impact of BaB 2 O 4 growth method on frequency conversion to the deep ultra-violetReport as inadecuate




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1 Laboratoire Charles Fabry - Lasers LCF - Laboratoire Charles Fabry 2 LMOPS - Laboratoire Matériaux Optiques, Photonique et Systèmes 3 Eolite Systems 4 Sobolev Institute of Geology and Mineralogy

Abstract : In this article, we report how the growth method used for barium beta-borate b-BaB2O4 BBOimpacts its high power second harmonic generation properties in the deep-UV. We compared a BBO crystalgrown by flux Top Seeded Solution Growth or TSSG and a BBO crystal grown by the Czochralski CZ method.We first characterized their transparency properties, then we measured their single-pass second harmonicconversion efficiencies with both a low average power and a high average power nanosecond pulsed lasers. Weshow that both crystals have comparable linear absorption and conversion efficiencies at low power, whereas ina high power experiment, the CZ-grown BBO yields higher conversion efficiency than the TSSG grown BBO.With a 30 W, 150 kHz, 8ns green laser, the use of a CZ BBO led at best to a 40% increase in available averageoutput power at 257 nm.

Keywords : Borates Nonlinear optical





Author: L Deyra - Alain Maillard - R Maillard - D Sangla - F Salin - F Balembois - A.E. Kokh - Patrick Georges -

Source: https://hal.archives-ouvertes.fr/



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