6533b828fe1ef96bd1288cfb
RESEARCH PRODUCT
Comprehensive formulation of temperature-dependent dispersion of optical materials: illustration with case of temperature tuning of a mid-IR HgGa_2S_4 OPO
Grégory GadretJ. ManginGabriel MenneratJean-claude De MiscaultValery V. Badikovsubject
Materials sciencebusiness.industryPhysics::OpticsNonlinear opticsStatistical and Nonlinear PhysicsLaserAtomic and Molecular Physics and OpticsThermal expansionlaw.inventionInterferometryWavelengthOpticslawOptical parametric oscillatorbusinessRefractive indexOptical depthdescription
The temperature dependence of refractive indices of optical materials is characterized in this work by what we call their normalized thermo-optic coefficients. These are determined experimentally through interferometric measurements of thermal expansion and of changes in optical thickness at a few laser wavelengths as function of temperature. A suitable vectorial formalism applied to these data allows predicting the thermal evolution of the refractive index all over the useful range of transparency. The validity and reliability of our methodology is demonstrated through temperature tuning of a mid-IR HgGa2S4 optical parametric oscillator (OPO) pumped at 1.0642 μm by a Nd:YAG laser. Measured thermal variation of both signal and idler wavelengths agrees very well with the predicted one.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2009-08-14 | Journal of the Optical Society of America B |