NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Portable fiber-coupled diode-laser-based sensor for multiple trace gas detectionTunable narrowband mid-infrared radiation from 3.25 to 4.4 micrometers is generated by a compact fiber-coupled, difference-frequency-based spectroscopic source. A 20-mW external cavity diode laser (with a tuning range from 814 to 870 nm) and a 50-mW distributed-Bragg-reflector diode-laser-seeded ytterbium-doped fiber amplifier operating at 1083 nm are difference-frequency mixed in a multi-grating, temperature-controlled periodically poled LiNbO3 crystal. A conversion efficiency of 0.44 mW/(W2cm) (corresponding to a power of approximately equal to 3 microW at 3.3 micrometers) represents the highest conversion efficiency reported for a portable device. Performance characteristics of such a sensor and its application to spectroscopic detection of CO2, N2O, H2CO, HCl, NO2, and CH4 will be reported in this work.
Document ID
20040088966
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Lancaster, D. G.
(Rice Quantum Institute, Rice University Houston, TX 77251-1892, United States)
Richter, D.
Tittel, F. K.
Date Acquired
August 21, 2013
Publication Date
November 1, 1999
Publication Information
Publication: Applied physics. B, Lasers and optics
Volume: 69
ISSN: 0946-2171
Subject Category
Life Sciences (General)
Distribution Limits
Public
Copyright
Other
Keywords
Non-NASA Center
NASA Discipline Environmental Health

Available Downloads

There are no available downloads for this record.
No Preview Available