Abstract

Transmission spectroscopy over large spectral ranges (>100cm1) generally requires a reference measurement to be taken separately from the sample scan. The ratio of the two measurements (i.e., the transmittance) is therefore susceptible to baseline changes that occur between the recording of the two spectra. The origins of relatively strong baseline changes (1%) of a difference-frequency- generation-based laser spectrometer (tuning range 29003144cm1, 150μW average power) were investigated and a method for minimizing them by improving reproducibility and reducing measurement time is presented. The new method was tested for a gas mixture and the sensitivity for broad absorption features was determined as 5×103 minimum measurable absorbance for a total scan duration of 70min.

© 2010 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Simultaneous observation of CO isotopomer absorption by broadband difference-frequency generation using a direct-bonded quasi-phase-matched LiNbO3 waveguide

Tsutomu Yanagawa, Osamu Tadanaga, Yoshiki Nishida, Hiroshi Miyazawa, Katsuaki Magari, Masaki Asobe, and Hiroyuki Suzuki
Opt. Lett. 31(7) 960-962 (2006)

Room-temperature mid-infrared laser sensor for trace gas detection

Thomas Töpfer, Konstantin P. Petrov, Yasuharu Mine, Dieter Jundt, Robert F. Curl, and Frank K. Tittel
Appl. Opt. 36(30) 8042-8049 (1997)

Widely tunable rapid-scanning mid-infrared laser spectrometer for industrial gas process stream analysis

Douglas J. Bamford, David J. Cook, Scott J. Sharpe, and Aaron D. Van Pelt
Appl. Opt. 46(19) 3958-3968 (2007)

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 (9)

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

Equations (7)

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