Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Long-path monitoring of NO2 with a 635 nm diode laser using frequency-modulation spectroscopy

Not Accessible

Your library or personal account may give you access

Abstract

In situ monitoring of traffic-generated nitrogen dioxide (NO2) emissions using long-path absorption spectroscopy is reported. High-sensitivity detection of NO2 is achieved by employing two-tone frequency-modulation spectroscopy at a visible absorption band using a tunable high-power diode laser operated around 635 nm. A real-time absorption spectrometer is accomplished by repetitively applying a rectangular current pulse to the diode-laser operating current, allowing detection of isolated NO2 absorption lines. A detection limit of 10 μg/m3 for NO2 at atmospheric pressure using a 160 m absorption path is demonstrated. Continuous monitoring of NO2 over a road intersection at peak traffic is performed.

© 2005 Optical Society of America

Full Article  |  PDF Article
More Like This
Long-Path Monitoring of Atmospheric Carbon Monoxide with a Tunable Diode Laser System

R. T. Ku, E. D. Hinkley, and J. O. Sample
Appl. Opt. 14(4) 854-861 (1975)

Frequency-modulation spectroscopy with blue diode lasers

Ulf Gustafsson, Gabriel Somesfalean, Janis Alnis, and Sune Svanberg
Appl. Opt. 39(21) 3774-3780 (2000)

Frequency modulation spectroscopy at 1.3 μm using InGaAsP lasers: a prototype field instrument for atmospheric chemistry research

T. J. Johnson, F. G. Wienhold, J. P. Burrows, and G. W. Harris
Appl. Opt. 30(4) 407-413 (1991)

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

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

Figures (3)

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

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

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved