Abstract

In this Letter, a 10μm quantum cascade laser operating in the intrapulse mode is used observe rapid passage (RP) effects within a 40cm single-pass gas cell containing low pressures of NH3. The laser tuning range allows the rotational states J=2 with K=0, 1, and 2 to be probed. We show that the RP structures change as a function of optical density and that the magnitude of the delay in the switch from absorption to emission as a function of increased gas pressure is dependent upon the initial value of K. These measurements are qualitatively well modeled using the Maxwell–Bloch equations.

© 2010 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Enhancement of trace gas detection by integrating wavelength modulated spectra across multiple lines

Andreas Karpf and Gottipaty N. Rao
Appl. Opt. 49(8) 1406-1413 (2010)

Application of a widely electrically tunable diode laser to chemical gas sensing with quartz-enhanced photoacoustic spectroscopy

Damien Weidmann, Anatoliy A. Kosterev, Frank K. Tittel, Neil Ryan, and David McDonald
Opt. Lett. 29(16) 1837-1839 (2004)

Absorption line shift with temperature and pressure: impact on laser-diode-based H2O sensing at 1.393 µm

Richard Phelan, Michael Lynch, John F. Donegan, and Vincent Weldon
Appl. Opt. 42(24) 4968-4974 (2003)

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 (4)

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

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