Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Optical-feedback cavity-enhanced absorption spectroscopy with a quantum cascade laser

Not Accessible

Your library or personal account may give you access

Abstract

Optical-feedback cavity-enhanced absorption spectroscopy is demonstrated in the mid-IR by using a quantum cascade laser (emitting at 4.46μm). The laser linewidth reduction and frequency locking by selective optical feedback from the resonant cavity field turns out to be particularly advantageous in this spectral range: It allows strong cavity transmission, which compensates for low light sensitivity, especially when using room-temperature detectors. We obtain a noise equivalent absorption coefficient of 3×109/cm for 1s averaging of spectra composed by 100 independent points. At 4.46μm, this yields a detection limit of 35 parts in 1012 by volume for N2O at 50mbar, corresponding to 4×107 molecules/cm3, or still to 1fmol in the sample volume.

© 2010 Optical Society of America

Full Article  |  PDF Article
More Like This
Linear cavity optical-feedback cavity-enhanced absorption spectroscopy with a quantum cascade laser

A. G. V. Bergin, G. Hancock, G. A. D. Ritchie, and D. Weidmann
Opt. Lett. 38(14) 2475-2477 (2013)

Sensitive CH4 detection applying quantum cascade laser based optical feedback cavity-enhanced absorption spectroscopy

N. Lang, U. Macherius, M. Wiese, H. Zimmermann, J. Röpcke, and J. H. van Helden
Opt. Express 24(6) A536-A543 (2016)

Sensitive absorption spectroscopy with a room-temperature distributed-feedback quantum-cascade laser

K. Namjou, S. Cai, E. A. Whittaker, J. Faist, C. Gmachl, F. Capasso, D. L. Sivco, and A. Y. Cho
Opt. Lett. 23(3) 219-221 (1998)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (3)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Metrics

Select as filters


Select Topics Cancel
© Copyright 2022 | Optica Publishing Group. All Rights Reserved