Abstract

A high-sensitivity spectroscopic system has been constructed with a GaAlAs diode laser by using two-tone frequency-modulation spectroscopy. We have demonstrated an absorption sensitivity of 3 × 10−7 in a 0.84-Hz bandwidth by using the Doppler-broadened water vapor absorption line at 12 238.32 cm−1. The sensitivity is limited by laser excess noise and is approximately five times less than the sensitivity expected on the basis of detector noise.

© 1989 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Two-tone frequency-modulation spectroscopy with a CO2 laser

David E. Cooper and Clinton B. Carlisle
J. Opt. Soc. Am. B 7(2) 164-171 (1990)

Comparison of approaches to modulation spectroscopy with GaAlAs semiconductor lasers: application to water vapor

Liang-guo Wang, Haris Riris, Clinton B. Carlisle, and Thomas F. Gallagher
Appl. Opt. 27(10) 2071-2077 (1988)

Quantum noise-limited FM spectroscopy with a lead-salt diode laser

Clinton B. Carlisle, David E. Cooper, and Horst Preier
Appl. Opt. 28(13) 2567-2576 (1989)

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 (6)

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 (3)

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 (9)

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