Issue |
J. Eur. Opt. Soc.-Rapid Publ.
Volume 6, 2011
|
|
---|---|---|
Article Number | 11032 | |
Number of page(s) | 8 | |
DOI | https://doi.org/10.2971/jeos.2011.11032 | |
Published online | 11 June 2011 |
Regular papers
Equivalent temperature of nonlinear-optical crystals interacting with laser radiation
1
NTO “IRE-Polus”, Vvedensky Sq.1, Fryazino, Moscow region, 141190, Russia
2
Moscow Institute of Physics and Technology, Institutskii per. 9, Dolgoprudny, Moscow region, 141700, Russia
3
Kotelnikov Institute of Radio-engineering and Electronics of RAS, Vvedensky Sq. 1, Fryazino, Moscow region, 141190, Russia
Received:
20
January
2011
Temperature calibrated piezoelectric resonances of internal acoustic vibration modes of a nonlinear-optical crystal during its heating by high-power laser radiation are used for noncontact measurements of both the non-uniform temperature distribution in the crystal volume and in the surrounding air. A novel notion of equivalent temperature of a crystal heated by laser radiation is introduced in laser physics. The true non-uniform crystal thermodynamic temperature at a given laser power is substituted by the measured equivalent crystal temperature, which is constant at that laser power. Using appropriate laser heating model the measured value of the equivalent crystal temperature allows one to calculate the unknown linear and nonlinear optical absorption coefficients as well as the heat transfer coefficient of the crystal with the surrounding air.
Key words: piezoelectric resonance / nonlinear-optical crystals / optical absorption / heat transfer coefficient
© The Author(s) 2011. All rights reserved.
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