O. A. Ryabushkin, D. V. Myasnikov, “Experimental determination and the theoretical model of an equivalent temperature of nonlinear optical crystals interacting with high-power laser radiation”, Kvantovaya Elektronika, 2012, Volume 42, Number 6,Pages <nobr>539

This article is cited in 14 papers

Nonlinear optical phenomena

Experimental determination and the theoretical model of an equivalent temperature of nonlinear optical crystals interacting with high-power laser radiation

O. A. Ryabushkin^abc, D. V. Myasnikov^ac

^a Moscow Institute of Physics and Technology (State University)
^b Kotelnikov Institute of Radioengineering and Electronics, Fryazino Branch, Russian Academy of Sciences
^c IRE-Polus Research and Technology Association, Fryazino, Moscow Region

Abstract: We present the results of the use of resonant ultrasound spectroscopy to study changes in temperature of crystals during their interaction with high-power laser radiation. To measure the nonuniform temperature of a crystal, use is made of the frequency (calibrated at uniform temperature θ) of the nth mode of the piezoelectric resonance Rf_n(θ) and its change ΔRf_n(P_in) upon crystal irradiation by laser light with an average power Pin. A spatially inhomogeneous distribution of thermodynamic temperature in the crystal at a fixed laser power Pin is set in correspondence with equivalent temperature θ_eq(P_in), defined in this paper. A mathematical model is proposed, justifying the correctness of its introduction. This parameter can be used to study any piezoelectric crystals interacting with laser radiation.

Keywords: high-power laser radiation, nonlinear optical crystals, equivalent temperature.

PACS: 42.70.Mp, 77.65.-j, 43.40.+s

Received: 20.05.2011
Revised: 15.03.2012