Second harmonic (SH) generation in optical waveguides is widely studied for its many applications. In order to obtain efficient non-linear phenomena in waveguides, it is ver). important that the optico-physical characteristics of the fabricated waveguides are exactly those foreseen in the project. This because in practical applications operation wavelength and temperature can rarely be adjusted to achieve phase-matching conditions. The present work describes a model that, once fixed the operation conditions, finds the optico-physical characteristics of Ti:LiNbO3 planar waveguides necessary to obtain SH generation and relates them to the fabrication parameters. Phase-matching conditions between the two interacting guided modes (fundamental and SH) are achieved by exploiting the material birefringence. The investigation is performed at a fundamental wavelength of 1.064 mu m and at room temperature on Y-cut, X-propagation waveguides. The waveguides, fabricated according to our design, were then characterised at different wavelengths. Experimental tests of SH generation confirmed the goodness of the model proposed.
Waveguides in Ti:LiNbO3 for second harmonic generation: Design and experimental tests
Palchetti L;Osellame R;
1996
Abstract
Second harmonic (SH) generation in optical waveguides is widely studied for its many applications. In order to obtain efficient non-linear phenomena in waveguides, it is ver). important that the optico-physical characteristics of the fabricated waveguides are exactly those foreseen in the project. This because in practical applications operation wavelength and temperature can rarely be adjusted to achieve phase-matching conditions. The present work describes a model that, once fixed the operation conditions, finds the optico-physical characteristics of Ti:LiNbO3 planar waveguides necessary to obtain SH generation and relates them to the fabrication parameters. Phase-matching conditions between the two interacting guided modes (fundamental and SH) are achieved by exploiting the material birefringence. The investigation is performed at a fundamental wavelength of 1.064 mu m and at room temperature on Y-cut, X-propagation waveguides. The waveguides, fabricated according to our design, were then characterised at different wavelengths. Experimental tests of SH generation confirmed the goodness of the model proposed.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
