Heterodyne spectrophotometry of ozone in the 9.6-μm band using a tunable diode laser

Tunable diode laser heterodyne spectrophotometry (TDLHS) has been used to make extremely high resolution (0.0003 cm−1) solar spectra in the 9.6-μm ozone band. Observations have shown that a signal-to-noise ratio of 120:1 (∼30% of theoretical) for an integration time of 1/8 s can be achieved at a resolution of 0.0013 wave numbers. The spectral data have been inverted to yield a total column amount of ozone, in good agreement with that measured at the nearby National Oceanic and Atmospheric Administration (NOAA) ozone monitoring facility in Boulder, Colorado. Line positions for several ozone lines in the spectral region 996–997 cm−1 are reported. Recent improvements have produced a signal-to-noise ratio of 95∶1 (∼40% of theoretical) at 0.0003 cm−1 and extended the range of wavelengths which can be observed.

[1]  David G. Murcray,et al.  High Resolution Studies Of Atmospheric Infrared Emission And Absorption Spectra , 1988, Defense, Security, and Sensing.

[2]  C. Rinsland,et al.  Measurements of air-broadened and nitrogen-broadened half-widths and shifts of ozone lines near 9 microns , 1988 .

[3]  A Goldman,et al.  The HITRAN database: 1986 edition. , 1987, Applied optics.

[4]  M. Mumma,et al.  Remote sensing by IR heterodyne spectroscopy. , 1983, Applied optics.

[5]  F. G. Fernald,et al.  Spectral least squares quantification of several atmospheric gases from high resolution infrared solar spectra obtained at the South Pole , 1983 .

[6]  J. Hoell,et al.  High resolution atmospheric spectroscopy using a diode laser heterodyne spectrometer , 1982 .

[7]  D. Buhl,et al.  Tunable diode-laser heterodyne spectrometer for remote observations near 8 microm. , 1982, Applied optics.

[8]  D. Spears,et al.  Balloon-borne laser heterodyne radiometer for measurements of stratospheric trace species. , 1981, Applied optics.

[9]  F. Allario,et al.  An experiment concept to measure stratospheric trace constituents by laser heterodyne spectroscopy , 1980 .

[10]  D. Buhl,et al.  Stratospheric sounding by infrared heterodyne spectroscopy , 1979 .

[11]  B. J. Rye.  Antenna parameters for incoherent backscatter heterodyne lidar. , 1979, Applied optics.

[12]  Y. Fujii,et al.  Incoherent optical heterodyne detection and its application to air pollution detection. , 1978, Applied optics.

[13]  David Buhl,et al.  Stratospheric ozone measurement with an infrared heterodyne spectrometer , 1978 .

[14]  M. Frerking,et al.  Infrared heterodyne spectroscopy of atmospheric ozone , 1977, IEEE Journal of Quantum Electronics.

[15]  D. Buhl,et al.  Sensitivity limits of an infrared heterodyne spectrometer for astrophysical applications: errata. , 1976, Applied optics.

[16]  S C Cohen,et al.  Heterodyne detection: phase front alignment, beam spot size, and detector uniformity. , 1975, Applied optics.

[17]  T. Blaney.  Signal-to-noise ratio and other characteristics of heterodyne radiation receivers , 1975 .

[18]  L. Mandel,et al.  Optimum conditions for heterodyne detection of light. , 1975 .

[19]  B. J. Rye,et al.  Tolerances in optical mixing , 1974 .

[20]  Anthony E. Siegman,et al.  The antenna properties of optical heterodyne receivers , 1966 .

[21]  C. T. McElroy,et al.  Tunable Diode Laser Heterodyne Spectrophotometry of Ozone , 1988 .

[22]  D. Glenar,et al.  Laser heterodyne spectrometer for helioseismology. , 1986, Applied optics.

[23]  D. Spears,et al.  Planar HgCdTe quadrantal heterodyne arrays with GHz response at 10.6 μm , 1977 .