Optical frequency stability controller
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United States of America Patent
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May 26, 1998
Grant Date -
N/A
app pub date -
Oct 10, 1996
filing date -
Oct 10, 1996
priority date (Note) -
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Abstract
The present invention is a method for calibrating power spectral data obtained with an interferometer based Fourier transform spectrometer which utilizes a laser based coherent radiant source as the metrology source. A radiant beam of predetermined wavelength from a neon lamp based noncoherent radiant source is directed in parallel with a radiant beam from the laser source into the interferometer to create a laser based interference pattern and a neon lamp based interference pattern. Distinct fringe counts are derived from the laser based interference pattern and the neon lamp based interference pattern. The wavelength of the laser source is determined based on a correlation between the known wavelength of the neon lamp based interference pattern and the determined fringe counts. The scale of the power spectral data is calibrated based on the determined wavelength of the laser source.
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