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Proceedings Paper

Chromium ion valence transformations in Cr,Ca:YAG used for passive Q-switching
Author(s): Revital Feldman; Yehoshua Shimony; Zeev Burshtein
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Paper Abstract

Composite laser devices of passively Q-switched Nd:YAG were prepared by optical contacting of a Ca,Cr:YAG crystal onto a Nd:YAG wafer, followed by thermal treatments at elevated temperatures. Thermal treatments of the composite devices under reducing and/or oxidizing environments enabled to control the Cr4+ ion concentration, which affects its absorption saturation behavior. Optical absorption saturation measurements on partialy reduced Ca,Cr:YAG crystal revealed that residual absorption of the saturable absorber at 1064 nm results from excited-state absorption. Laser damage measurements at the gain/absorber interface of the monolithic device showed that the damage threshold at the gain/absorber interface of the composite device is higher than at the entrance interface. The high optical quality device thus obtained was end-pumped by a fiber-optic-coupled diode laser, and exhibited a high repetition-rate oscillations of short pulses, with fair beam quality.

Paper Details

Date Published: 16 June 2003
PDF: 14 pages
Proc. SPIE 4970, Laser Crystals, Glasses, and Nonlinear Materials Growth and Characterization, (16 June 2003); doi: 10.1117/12.483711
Show Author Affiliations
Revital Feldman, Soreq Nuclear Research Ctr. (Israel)
Yehoshua Shimony, Soreq Nuclear Research Ctr. (Israel)
Zeev Burshtein, Ben-Gurion Univ. of the Negev (Israel)

Published in SPIE Proceedings Vol. 4970:
Laser Crystals, Glasses, and Nonlinear Materials Growth and Characterization
Yehoshua Y. Kalisky, Editor(s)

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