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

Research output: Contribution to journalArticle

12 Citations (Scopus)


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
Issue number19
Publication statusPublished - 22 Sep 2014


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.