Dresden 2011 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 62: Laseranwendungen: Lebenswiss. und Umweltphys.

Q 62.3: Talk

Friday, March 18, 2011, 11:15–11:30, HÜL 386

Absorption measurements via self-phase modulation of light — •Jessica Steinlechner, Stefan Ast, Nico Lastzka, Sebastian Steinlechner, and Roman Schnabel — Albert Einstein Institut, MPI für Gravitationsphysik, QUEST, Leibniz Universität Hannover

The precise measurement of small optical absorptions in dielectric coatings and nonlinear materials is a challenging task. Within the SFB TR7 an absorption measurement scheme based on the shape of the airy peaks of a scanned optical resonator was developed. Due to the heating of the intra-cavity material or the mirror coatings, the transmitted as well as the reflected airy peaks show a hysteresis depending on the scan direction. A time domain simulation based on is used to fit the measurement data. Using these method we measured the absorption of high reflective mirror coatings and a PPKTP substrate. To prove the quantitative result of the measurements we compared our results to measurements with a calorimetric method and values known from literature respectively.