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Laser heterodyne spectrometer for helioseismologyThe technique of laser heterodyne spectroscopy has been applied to the measurement of solar oscillations. Coherent mixing of solar radiation with the output of a frequency-stabilized CO2 laser permits the measurement of fully resolved profiles of solar absorption lines with high spectral purity and excellent frequency stability. This technique has been used to measure OH pure rotation lines in the infrared solar spectrum. Power spectra of these line frequency measurements show the well-known 5-min oscillations as well as significant velocity power at shorter periods.
Document ID
19860038590
Document Type
Reprint (Version printed in journal)
Authors
Glenar, D. A. (Colgate University Hamilton, NY, United States)
Deming, D. (Colgate Univ. Hamilton, NY, United States)
Espenak, F. (Colgate Univ. Hamilton, NY, United States)
Kostiuk, T. (Colgate Univ. Hamilton, NY, United States)
Mumma, M. J. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 12, 2013
Publication Date
January 1, 1986
Publication Information
Publication: Applied Optics
Volume: 25
ISSN: 0003-6935
Subject Category
INSTRUMENTATION AND PHOTOGRAPHY
Distribution Limits
Public
Copyright
Other