CW optical parametric oscillator for the mid-IR range

Abstract

We report the development of a cw optical parametric oscillator (OPO) for the mid-IR range. The oscillator uses a 50-mm long periodically poled lithium niobate crystal in a ring resonator. The OPO is pumped by an ytterbium fibre laser with a wavelength of 1.064 μm. At a pump power of 10 W, the OPO generates continuous radiation with a wavelength of 3.6 μm and a power of 2.8 W. The pump power depletion in the OPO is 94of the OPO, i.e., the pump depletion, and on a quantum description of three interacting light waves. The power characteristics of the operating OPO are in good agreement with those predicted by the theoretical model.

Titanium and silicon oxides for infrared AR coating design

“…Today, solid-state emitters are one of the promising areas for creating frequency converters, such as optical parametric generators (OPOs). Such emitters are interesting for the possibility of obtaining (converting) radiation in the range of 2-12 μm, based on the phenomenon of parametric generation ferroelectric oxides, such as LiNbO3, KTP, KTA and others, capable of converting pump radiation to the wavelength range of 3-4 μm [1][2][3][4]. In the range of 4-12 μm, crystals based on ternary compounds with a chalcopyrite type crystal lattice are used to generate radiation: AgGaS2, AgGaSe2, ZnGeP2, and also GaSe [5,6].…”