Absorption Measurements of Periodically Poled Potassium Titanyl Phosphate (PPKTP) at 775 nm and 1550 nm

J. Steinlechner, S. Ast, C. Kruger, A.P. Singh, T. Eberle, V. Handchen, R. Schnabel*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review


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.
Original languageEnglish
Pages (from-to)565-573
Number of pages9
Issue number1
Publication statusPublished - 1 Jan 2013
Externally publishedYes


  • absorption
  • photo-thermal

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