Laser heterodyne spectrometer using a liquid nitrogen cooled tunable diode laser for remote measurements of atmospheric O sub 3 and N sub 2 O

Journal Article · Wed Jun 20 04:00:00 EDT 1990 · Applied Optics; (USA)

DOI:https://doi.org/10.1364/AO.29.002722· OSTI ID:7065748

Fukunishi, H; Okano, S; Taguchi, M; Ohnuma, T ^[1]

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1. Tohoku University, Upper Atmosphere Space Research Laboratory, Sendai 980 (Japan)

A laser heterodyne spectrometer with a tunable diode laser as a local oscillator has been developed for ultrahigh resolution IR spectroscopy of the absorption spectra of trace constituents in the earth's atmosphere. The spectral resolution and SNR of the developed system are 0.0013 cm{sup {minus}1} and {similar to}500, respectively. This performance is sufficient for retrieving the altitude profile of atmospheric O{sub 3} through an inversion method. The altitude profile of atmospheric N{sub 2}O has been also obtained for the first time with this laser heterodyne technique. The high resolution and high SNR have been accomplished by adopting a tunable diode laser which operates at liquid nitrogen temperature and by developing an effective technique to eliminate the optical feedback of the local oscillator laser beam.

• OSTI ID: 7065748
• Journal Information: Applied Optics; (USA), Journal Name: Applied Optics; (USA) Vol. 29:18; ISSN 0003-6935; ISSN APOPA
• Country of Publication: United States
• Language: English

Related Subjects

440600* -- Optical Instrumentation-- (1990-)
47 OTHER INSTRUMENTATION
54 ENVIRONMENTAL SCIENCES
540120 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
ABSORPTION SPECTRA
AIR POLLUTION MONITORING
CHALCOGENIDES
DESIGN
EARTH ATMOSPHERE
ELECTRONIC EQUIPMENT
EQUIPMENT
HETERODYNE RECEIVERS
INFRARED SPECTRA
INFRARED SPECTROMETERS
LASERS
LOW TEMPERATURE
MEASURING INSTRUMENTS
MICROWAVE EQUIPMENT
NITROGEN COMPOUNDS
NITROGEN OXIDES
NITROUS OXIDE
OXIDES
OXYGEN COMPOUNDS
OZONE
RADIO EQUIPMENT
REMOTE SENSING
SEMICONDUCTOR DEVICES
SEMICONDUCTOR LASERS
SIGNAL-TO-NOISE RATIO
SOLID STATE LASERS
SPECTRA
SPECTROMETERS
STRATOSPHERE