n142746SE Academic Article uri icon

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(-8) cm(-1)Hz(-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.

published proceedings

  • Opt Express

author list (cited authors)

  • Zhu, F., Bounds, J., Bicer, A., Strohaber, J., Kolomenskii, A. A., Gohle, C., Amani, M., & Schuessler, H. A.

publication date

  • January 1, 2014 11:11 AM