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Proceedings of SPIE - The International Society for Optical Engineering

Lithium niobate: wavelength and temperature dependence of the thermo-optic coefficient in the visible and near infrared

S Fieberg 1
, 
L. Streit 1
, 
J. Kiessling 1
, 
P Becker 2
, 
L. Bohaty 2
, 
F Kühnemann 1
, 
K Buse 3
1
 
2
 
Univ. zu Köln (Germany) | 
3
 
Publication type: Proceedings Article
Publication date: 2015-03-24
SJR: 0.152
CiteScore: 0.5
Impact factor: —
ISSN: 0277786X, 1996756X
Abstract
The thermo-optic coefficient of lithium niobate (LiNbO3) has been measured in the temperature range from 10 to 160 °C using an interferometric setup. Undoped and magnesium-doped congruently melting LiNbO3 and undoped stoichiometric LiNbO3 were studied over a wide wavelength range in the visible and near infrared (450 – 600 nm and 900 – 1130 nm) using a frequency-doubled cw optical parametric oscillator. Experimental results for congruently grown lithium niobate were aggregated using a Schott equation to describe the wavelength and temperature dependence of the thermo-optic coefficient.
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