OSA's Digital Library

Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 40, Iss. 6 — Feb. 20, 2001
  • pp: 829–839

Wavelength-modulation laser hygrometer for ultrasensitive detection of water vapor in semiconductor gases

David Christian Hovde, Joseph T. Hodges, Gregory E. Scace, and Joel A. Silver  »View Author Affiliations


Applied Optics, Vol. 40, Issue 6, pp. 829-839 (2001)
http://dx.doi.org/10.1364/AO.40.000829


View Full Text Article

Enhanced HTML    Acrobat PDF (173 KB)





Browse Journals / Lookup Meetings

Browse by Journal and Year


   


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools

Share
Citations

Abstract

Water vapor is measured by use of a near-infrared diode laser and wavelength-modulation absorption spectroscopy. Humidity levels as low as 5 nmol/mol [1 nmol/mol = 1 ppb (1 ppb equals 1 part in 109)] of water vapor in air are measured with a sensitivity of better than 0.2 nmol/mol (3σ). The sensitivity, linearity, and stability of the technique are determined in experiments conducted at the National Institute of Standards and Technology, Gaithersburg, Maryland, by use of the low frost-point humidity generator over the range from 5 nmol/mol to 2.5 µmol/mol of water vapor in air. The pressure-broadening coefficients for water broadened by helium [0.0199(6) cm-1 atm-1 HWHM] and by hydrogen chloride [0.268(6) cm-1 atm-1 HWHM] are reported for the water line at 1392.5 nm.

© 2001 Optical Society of America

OCIS Codes
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(120.6200) Instrumentation, measurement, and metrology : Spectrometers and spectroscopic instrumentation
(300.0300) Spectroscopy : Spectroscopy
(300.1030) Spectroscopy : Absorption
(300.6260) Spectroscopy : Spectroscopy, diode lasers
(300.6380) Spectroscopy : Spectroscopy, modulation

History
Original Manuscript: June 1, 2000
Revised Manuscript: August 17, 2000
Published: February 20, 2001

Citation
David Christian Hovde, Joseph T. Hodges, Gregory E. Scace, and Joel A. Silver, "Wavelength-modulation laser hygrometer for ultrasensitive detection of water vapor in semiconductor gases," Appl. Opt. 40, 829-839 (2001)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-40-6-829

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
Log in to access OSA Member Subscription

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
Log in to access OSA Member Subscription

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
Log in to access OSA Member Subscription

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
Log in to access OSA Member Subscription

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited