Widely tunable and high resolution mid-infrared laser based on BaGa₄Se₇ optical parametric oscillator

Abstract

The widely tunable and high resolution mid-infrared laser based on a BaGa₄Se₇ (BGSe) optical parametric oscillator (OPO) was demonstrated. A wavelength tuning range of 2.76–4.64 μm and a wavelength tuning resolution of about 0.3 nm were obtained by a BGSe (56.3°, 0°) OPO, which was pumped by a 1064 nm laser. It is the narrowest reported wavelength tuning resolution for BGSe OPO, and was obtained by simultaneously controlling the angle and temperature of BGSe.

Key words： Widely tunable; High resolution; BaGa₄Se₇; Optical parametric oscillator

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