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Silicon photonic on-chip trace-gas spectroscopy of methane

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Abstract

We demonstrate a silicon photonic chip sensor for absorption spectroscopy of methane near =1651 nm. Noise analysis demonstrates 8.5×10-4 Hz-1/2 minimum fractional absorption and Gaussian noise performance with 20 ppmv detection limit at ~103 s.

© 2016 Optical Society of America

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