Abstract

Ultrasensitive detection of methane, isotopic carbon dioxide, carbon monoxide, formaldehyde, acetylene, and ethylene is performed in the spectral range 2.5–5 μm using intracavity spectroscopy in broadband optical parametric oscillators (OPOs). The OPOs were operated near degeneracy and synchronously pumped either by a mode-locked erbium (1560 nm) or thulium (2050 nm) fiber laser. A large instantaneous bandwidth of up to 800cm1 allows for simultaneous detection of several gases. We observe an effective path-length enhancement due to coherent interaction inside the OPO cavity and achieve part-per-billion sensitivity levels. The measured spectral shapes are in good agreement with a model that takes into account group delay dispersion across the broad OPO frequency band.

© 2013 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Gas-phase broadband spectroscopy using active sources: progress, status, and applications [Invited]

Kevin C. Cossel, Eleanor M. Waxman, Ian A. Finneran, Geoffrey A. Blake, Jun Ye, and Nathan R. Newbury
J. Opt. Soc. Am. B 34(1) 104-129 (2017)

Mid-infrared Fourier transform spectroscopy with a broadband frequency comb

Florian Adler, Piotr Masłowski, Aleksandra Foltynowicz, Kevin C. Cossel, Travis C. Briles, Ingmar Hartl, and Jun Ye
Opt. Express 18(21) 21861-21872 (2010)

Probing methane in air with a midinfrared frequency comb source

Feng Zhu, Jinbao Xia, Aysenur Bicer, James Bounds, Alexandre Kolomenskii, James Strohaber, Lewis Johnson, Mahmood Amani, and Hans Schuessler
Appl. Opt. 56(22) 6311-6316 (2017)

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 OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA 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 OSA member, or as an authorized user of your institution.

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

Figures (17)

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

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

Tables (1)

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

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

Equations (10)

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

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

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

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