15 February 2018 Whispering gallery optical parametric oscillators for the mid-infrared spectral range
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The tunability of cw optical parametric oscillators can be extended in the mid-infrared spectral range by using whispering gallery resonators (WGRs) made of non-oxide crystals. We demonstrate the fabrication of WGRs from silver gallium selenide, cadmium silicon phosphide and orientation-patterned gallium phosphide with quality factors above 106 . The resonators made of the first two provide optical parametric oscillation in the mid-infrared pumped by a compact laser diode at 1.57 μm wavelength. The wavelength tunability of the device based on silver gallium selenide provides a tuning range beyond 8 μm wavelength. These achievements are considered as the first steps of cw optical parametric oscillators into this important spectral region.
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Ingo Breunig, Ingo Breunig, Kevin Hanka, Kevin Hanka, Yuechen Jia, Yuechen Jia, Kevin T. Zawilski, Kevin T. Zawilski, Peter G. Schunemann, Peter G. Schunemann, Karsten Buse, Karsten Buse, } "Whispering gallery optical parametric oscillators for the mid-infrared spectral range", Proc. SPIE 10516, Nonlinear Frequency Generation and Conversion: Materials and Devices XVII, 105160E (15 February 2018); doi: 10.1117/12.2292834; https://doi.org/10.1117/12.2292834


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