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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 31, Iss. 21 — Jul. 20, 1992
  • pp: 4106–4112

Stationary Fourier-transform spectrometer

Marja-Leena Junttila  »View Author Affiliations


Applied Optics, Vol. 31, Issue 21, pp. 4106-4112 (1992)
http://dx.doi.org/10.1364/AO.31.004106


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Abstract

The performance and the characteristics of an interferometric double-mirror spectrometer with uncollimated light are studied by measuring spectra of different radiation sources. The stationary interferometer is fabricated without a beam splitter or moving components. The measured interferogram visibilities, which are limited by the size of the source aperture, agree with the theoretical predictions for a slit and a circular source aperture. By background subtraction the effect of detection nonuniformity can be radically reduced to increase the dynamics and the resolving power of the spectrometer. We used a mercury pencil lamp for measurement and found that the dynamic range was ~ 80 dBm. When isolated spectral lines are measured, the resolving power can be improved by squeezing more than half of a spatial interference cycle onto one pixel. The maximum resolving power reached in measuring the spectra of a diode laser was 1600. The instrument is applicable to a wide range of measurements, such as the recording of temporally variant, wideband radiation sources and the monitoring of laser wavelength.

© 1992 Optical Society of America

History
Original Manuscript: September 17, 1991
Published: July 20, 1992

Citation
Marja-Leena Junttila, "Stationary Fourier-transform spectrometer," Appl. Opt. 31, 4106-4112 (1992)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-31-21-4106

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