Investigation into the ways of tuning parametric oscillators of visible and IR ranges

Different versions of optical parametric oscillator (OPO) schemes were experimentally realised and investigated, which utilise AgGaS₂, LiNbO₃ and HgGa₂S₄ single crystals as well as an Hg_1-xCd_xGa₂S₄ solid solution. The OPOs generate radiation in the 1.2—5.7-μm range and make use of different ways of output wavelength tuning, including fast wavelength tuning (in a time shorter than 0.1 ms) with the help of an acoustooptical deflector. The output spectral line was narrowed by means of an intracavity acoustooptical filter. An OPO for the visible range with an electrodynamic tuning to an arbitrary wavelength in this range in a time of 5ms was implemented employing a BBO single crystal.