Difference frequency generation in the mid-infrared with orientation-patterned gallium phosphide crystals

We report on the generation of coherent mid-infrared radiation around 5.85 μm by difference frequency generation (DFG) of a continuous-wave Nd:YAG laser at 1064 nm and a diode laser at 1301 nm in an orientation-patterned gallium phosphide (OP-GaP) crystal. We provide the first characterization of th...

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Bibliographic Details
Published in:Optics letters 2016-11, Vol.41 (21), p.5114-5117
Main Authors: Insero, Giacomo, Clivati, Cecilia, D'Ambrosio, Davide, Natale, Paolo De, Santambrogio, Gabriele, Schunemann, Peter G, Zondy, Jean-Jacques, Borri, Simone
Format: Article
Language:English
Subjects:
Crystal structure
Efficiency
Gallium phosphides
Gaussian beams (optics)
Lasers
Nonlinearity
Tuning
Wavelengths
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Summary:We report on the generation of coherent mid-infrared radiation around 5.85 μm by difference frequency generation (DFG) of a continuous-wave Nd:YAG laser at 1064 nm and a diode laser at 1301 nm in an orientation-patterned gallium phosphide (OP-GaP) crystal. We provide the first characterization of the linear, thermo-optic, and nonlinear properties of OP-GaP in a DFG configuration. Moreover, by comparing the experimental efficiency to Gaussian beam DFG theory, we derive an effective nonlinear coefficient d=17(3)  pm/V for first-order quasi-phase-matched OP-GaP. The temperature and signal wavelength tuning curves are in qualitative agreement with theoretical modeling.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.41.005114