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Proceedings Paper

Interaction of high intensity optical pulses with modified nonlinear GaSe crystals
Author(s): Jin Guo; Jijiang Xie; Laiming Zhang; Ke Jiang; Fei Chen; Yu. M. Andreev; V. V. Atuchin; K. A. Kokh; G. V. Lanskii; V. F. Losev; A. V. Shaiduko
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Paper Abstract

The modified Bridgman method with heat field rotation was used to grow ε-polytype single crystals of pure and 1, 2 and 10 mass % S-doped GaSe or solid solution crystals GaSe1-xSx, x = 0.002, 0.091, 0.412. The interaction of ultrashort laser pulses of ∼ 100 fs duration at 800 nm and 2 μm with the grown crystals was studied at room temperature. Up to 3.4-fold advantage of S-doped crystals in limit pump intensity (no decrease in the transmission) was found under 800 nm pump at S-content increase up to 10 mass %. The advantage became a half less at 2 μm pump due to a decrease of two-photon absorption in pure GaSe crystals. The spectral dependence of transient absorption is recorded with 37 fs resolution and interpreted. It was ascertained that first observable damage of high quality crystals is caused by dissociation of submicrometer thick surface layer to initial elements and do not influence the frequency conversion efficiency until alloying of dissociated Ga. Local microdefects, multiphoton absorption and transient transmission processes are identified as key factors responsible for damage threshold.

Paper Details

Date Published: 16 May 2013
PDF: 10 pages
Proc. SPIE 8796, 2nd International Symposium on Laser Interaction with Matter (LIMIS 2012), 87962D (16 May 2013); doi: 10.1117/12.2011176
Show Author Affiliations
Jin Guo, Changchun Institute of Optics, Fine Mechanics and Physics (China)
Jijiang Xie, Changchun Institute of Optics, Fine Mechanics and Physics (China)
Laiming Zhang, Changchun Institute of Optics, Fine Mechanics and Physics (China)
Ke Jiang, Changchun Institute of Optics, Fine Mechanics and Physics (China)
Fei Chen, Changchun Institute of Optics, Fine Mechanics and Physics (China)
Yu. M. Andreev, Changchun Institute of Optics, Fine Mechanics and Physics (China)
Institute of Monitoring of Climatic and Ecological Systems (Russian Federation)
V. V. Atuchin, A.V. Rzhanov Institute of Semiconductor Physics (Russian Federation)
K. A. Kokh, Institute of Geology and Mineralogy (Russian Federation)
G. V. Lanskii, Changchun Institute of Optics, Fine Mechanics and Physics (China)
Institute for Monitoring of Climatic and Ecological Systems (Russian Federation)
V. F. Losev, Institute of High Current Electronics (Russian Federation)
A. V. Shaiduko, Changchun Institute of Optics, Fine Mechanics and Physics (China)
Institute of Monitoring of Climatic and Ecological Systems (Russian Federation)


Published in SPIE Proceedings Vol. 8796:
2nd International Symposium on Laser Interaction with Matter (LIMIS 2012)
Stefan Kaierle; Jingru Liu; Jianlin Cao, Editor(s)

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