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Microresonator-based High-resolution Gas Spectroscopy by Yu, Mengjie; Okawachi, Yoshitomo; Griffith, Austin G.; Lipson, Michal; Gaeta, Alexander L. is a scholarly article available to read on EtoBox.

What is Microresonator-based High-resolution Gas Spectroscopy about?

In recent years, microresonator-based optical frequency combs have created up opportunities for developing a spectroscopy laboratory on a chip due to its broadband emission and high comb power. However, with mode spacings typically in the range of 10 - 1000 GHz, the realization of a chip-based high-resolution spectrometer suitable for gas-phase spectroscopy has proven to be difficult. Here, we show mode-hop-free tuning of a microresonator-based frequency comb over 16 GHz by simultaneously tuning both the pump laser and the cavity resonance. We illustrate the power of this scanning technique by demonstrating gas-phase molecular fingerprinting of acetylene with a high-spectral-resolution of < 80 MHz over a 45-THz optical bandwidth in the mid-IR. Our technique represents a significant step towards on-chip gas sensing with an ultimate spectral resolution given by the comb linewidth.

Author

Yu, Mengjie; Okawachi, Yoshitomo; Griffith, Austin G.; Lipson, Michal; Gaeta, Alexander L.

Published

2017

Language

EN