Absorption measurements of periodically poled potassium titanyl phosphate (PPKTP) at 775 nm and 1550 nm

Jessica Steinlechner; Stefan Ast; Christoph Krüger; Amrit Pal Singh; Tobias Eberle; Vitus Händchen; Roman Schnabel

doi:10.3390/s130100565

Absorption measurements of periodically poled potassium titanyl phosphate (PPKTP) at 775 nm and 1550 nm

Sensors (Basel). 2013 Jan 4;13(1):565-73. doi: 10.3390/s130100565.

Authors

Jessica Steinlechner¹, Stefan Ast, Christoph Krüger, Amrit Pal Singh, Tobias Eberle, Vitus Händchen, Roman Schnabel

Affiliation

¹ Institut für Gravitationsphysik, Leibniz Universität Hannover and Max-Planck-Institut für Gravitationsphysik (Albert-Einstein-Institut), Hannover, Germany.

Abstract

The efficient generation of second-harmonic light and squeezed light requires non-linear crystals that have low absorption at the fundamental and harmonic wavelengths. In this work the photo-thermal self-phase modulation technique is exploited to measure the absorption coefficient of periodically poled potassium titanyl phosphate (PPKTP) at 1,550 nm and 775 nm. The measurement results are (84±40) ppm/cm and (127±24) ppm/cm, respectively. We conclude that the performance of state-of-the-art frequency doubling and squeezed light generation in PPKTP is not limited by absorption.

Publication types

Research Support, Non-U.S. Gov't