Near infrared frequency comb vernier spectrometer for broadband trace gas detection

Feng Zhu, James Bounds, Aysenur Bicer, James Strohaber, Alexandre A. Kolomenskii, Christoph Gohle, Mahmood Amani, Hans A. Schuessler

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Abstract

We present a femtosecond frequency comb vernier spectrometer in the near infrared with a femtosecond Er doped fiber laser, a scanning high-finesse cavity and an InGaAs camera. By utilizing the properties of a frequency comb and a scanning high-finesse cavity such a spectrometer provides broad spectral bandwidth, high spectral resolution, and high detection sensitivity on a short time scale. We achieved an absorption sensitivity of ∼8 × 10-8cm-1Hz-1/2, corresponding to a detection limit of ∼70 ppbv for acetylene, with a resolution of ∼1.1 GHz in single images taken in 0.5 seconds and covering a frequency range of ∼5 THz. Such measurements have broad applications for sensing greenhouse gases in this fingerprint near infrared region with a simple apparatus.

Original languageEnglish
Pages (from-to)23026-23033
Number of pages8
JournalOptics Express
Volume22
Issue number19
DOIs
Publication statusPublished - 22 Sep 2014

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ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Medicine(all)

Cite this

Zhu, F., Bounds, J., Bicer, A., Strohaber, J., Kolomenskii, A. A., Gohle, C., Amani, M., & Schuessler, H. A. (2014). Near infrared frequency comb vernier spectrometer for broadband trace gas detection. Optics Express, 22(19), 23026-23033. https://doi.org/10.1364/OE.22.023026