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High-power continuous-wave mid-infrared radiation generated by difference frequency mixing of diode-laser-seeded fiber amplifiers and its application to dual-beam spectroscopyWe report the generation of up to 0.7 mW of narrow-linewidth (<60-MHz) radiation at 3.3 micrometers by difference frequency mixing of a Nd:YAG-seeded 1.6-W Yb fiber amplifier and a 1.5-micrometers diode-laser-seeded 0.6-W Er/Yb fiber amplifier in periodically poled LiNbO3. A conversion efficiency of 0.09%/W (0.47 mWW-2 cm-1) was achieved. A room-air CH4 spectrum acquired with a compact 80-m multipass cell and a dual-beam spectroscopic configuration indicates an absorption sensitivity of +/-2.8 x 10(-5) (+/-1 sigma), corresponding to a sub-parts-in-10(9) (ppb) CH4 sensitivity (0.8 ppb).
Document ID
20040088907
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Lancaster, D. G.
(Rice Quantum Institute, Rice University Houston, Texas 77005, United States)
Richter, D.
Curl, R. F.
Tittel, F. K.
Goldberg, L.
Koplow, J.
Date Acquired
August 21, 2013
Publication Date
December 1, 1999
Publication Information
Publication: Optics letters
Volume: 24
Issue: 23
ISSN: 0146-9592
Subject Category
Life Sciences (General)
Distribution Limits
Public
Copyright
Other
Keywords
Non-NASA Center
NASA Discipline Environmental Health

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