NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Blocked impurity band detectors applied to tunable diode laser spectroscopy in the 8- to 28-micron rangeA novel tunable diode laser spectrometer operating at 8-28 microns is described. A blocked impurity band Si:As chip is employed as detector. This device operates in this wavelength range with high detectivity and adequate frequency response for the high-sensitivity techniques used. A combination of sweep averaging and second-harmonic detection at 22 kHz yielded signal-to-noise ratios of 1200 at wavelengths above 20 microns. The sensitivity and spectral resolution achieved are an order of magnitude better than those of Fourier instruments in this range, with an improvement in instrument time response of about 3000. Several molecular bands of CO2 and N2O are observed for what is, to our knowledge, the first time with this instrument. Examples of spectral line measurements are presented.
Document ID
19930052189
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Sirota, J. M.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Reuter, Dennis C.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Mumma, Michael J.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 16, 2013
Publication Date
April 20, 1993
Publication Information
Publication: Applied Optics
Volume: 32
Issue: 12
ISSN: 0003-6935
Subject Category
Lasers And Masers
Accession Number
93A36186
Distribution Limits
Public
Copyright
Other

Available Downloads

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