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

On-line multicomponent trace-gas analysis with a broadly tunable pulsed difference-frequency laser spectrometer

Not Accessible

Your library or personal account may give you access

Abstract

The design and application of a novel automated room-temperature laser spectrometer are reported. The compact instrument is based on difference-frequency generation in bulk LiNbO3. The instrument employs a tunable cw external-cavity diode laser (795–825 nm) and a pulsed diode-pumped Nd:YAG laser (1064 nm). The generated mid-IR nanosecond pulses of 50-µW peak power and 6.5-kHz repetition rate, continuously tunable from 3.16 to 3.67 µm, are coupled into a 36-m multipass cell for spectroscopic studies. On-line measurements of methane are performed at concentrations between 200 ppb (parts in 109 by mole fraction) and ≈1%, demonstrating a large dynamic range of 7 orders of magnitude. Furthermore computer-controlled multicomponent analysis of a mixture containing five trace gases and water vapor with an overall response time of 90 s at an averaging time of only ≈30 s is reported. A minimum detectable absorption coefficient of 1.1 × 10-7 cm-1 has been achieved in an averaging time of 60 s, enabling detection limits in the ppb range for many important trace gases, such as CH4, C2H6, H2CO, NO2, N2O, HCl, HBr, CO, and OCS.

© 1999 Optical Society of America

Full Article  |  PDF Article
More Like This
Compact gas sensor using a pulsed difference-frequency laser spectrometer

Michael Seiter and Markus W. Sigrist
Opt. Lett. 24(2) 110-112 (1999)

Development of an automated diode-laser-based multicomponent gas sensor

Dirk Richter, David G. Lancaster, and Frank K. Tittel
Appl. Opt. 39(24) 4444-4450 (2000)

Room-temperature mid-infrared laser sensor for trace gas detection

Thomas Töpfer, Konstantin P. Petrov, Yasuharu Mine, Dieter Jundt, Robert F. Curl, and Frank K. Tittel
Appl. Opt. 36(30) 8042-8049 (1997)

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 (7)

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 (2)

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 (4)

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