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

Absorption and wavelength modulation spectroscopy of NO 2 using a tunable, external cavity continuous wave quantum cascade laser

Not Accessible

Your library or personal account may give you access

Abstract

The absorption spectra and wavelength modulation spectroscopy (WMS) of NO2 using a tunable, external cavity CW quantum cascade laser operating at room temperature in the region of 1625 to 1645cm1 are reported. The external cavity quantum cascade laser enabled us to record continuous absorption spectra of low concentrations of NO2 over a broad range (16cm1), demonstrating the potential for simultaneously recording the complex spectra of multiple species. This capability allows the identification of a particular species of interest with high sensitivity and selectivity. The measured spectra are in excellent agreement with the spectra from the high-resolution transmission molecular absorption database [J. Quant. Spectrosc. Radiat. Transfer 96, 139–204 (2005)]. We also conduct WMS for the first time using an external cavity quantum cascade laser, a technique that enhances the sensitivity of detection. By employing WMS, we could detect low-intensity absorption lines, which are not visible in the simple absorption spectra, and demonstrate a minimum detection limit at the 100ppb level with a short-path absorption cell. Details of the tunable, external cavity quantum cascade laser system and its performance are discussed.

© 2009 Optical Society of America

Full Article  |  PDF Article
More Like This
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)

Enhanced sensitivity for the detection of trace gases using multiple line integrated absorption spectroscopy

Andreas Karpf and Gottipaty N. Rao
Appl. Opt. 48(27) 5061-5066 (2009)

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 (6)

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

Tables (1)

You do not have subscription access to this journal. Article tables 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

Equations (1)

You do not have subscription access to this journal. Equations 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