Hexagonally poled lithium niobate for second harmonic and optical parametric generation

In this paper we present results of an experimental and theoretical study on basic non-linear optical properties in hexagonally poled lithium niobate (HexLN). We measured the 'temperature-tuning curve in a second harmonic generation (SHG) process and we studied the theoretical dependencies of the pump-signal and pump-idler angles on the signal wavelength for an optical parametric generation (OPG) process. The pump wavelength was 1536 nm in the SHG experiment and 1040 nm in the OPG study.