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Adaptive Perfect Coherent Absorber for Photoacoustic Spectroscopy

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Abstract

Using adaptive coupled Fabry-Perot cavities, we have utilized the concept of perfect coherent absorbers in a compact and sensitive photoacoustic spectrometer. Normalized noise-equivalent absorption (NNEA) coefficient of 1×1010cm1W/Hz is measured.

© 2017 Optical Society of America

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