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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 37, Iss. 18 — Sep. 15, 2012
  • pp: 3912–3914

Dispersed single-phase-step Michelson interferometer for Doppler imaging using sunlight

Xiaoke Wan and Jian Ge  »View Author Affiliations

Optics Letters, Vol. 37, Issue 18, pp. 3912-3914 (2012)

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A Michelson interferometer is dispersed with a fiber array-fed spectrograph, providing 59 Doppler sensing channels using sunlight in the 510–570 nm wavelength region. The interferometer operates at a single-phase-step mode, which is particularly advantageous in multiplexing and data processing compared to the phase-stepping mode of other interferometer spectrometer instruments. Spectral templates are prepared using a standard solar spectrum and simulated interferometer modulations, such that the correlation function with a measured 1D spectrum determines the Doppler shift. Doppler imaging of a rotating cylinder is demonstrated. The average Doppler sensitivity is 12 m / s , with some channels reaching 5 m / s .

© 2012 Optical Society of America

OCIS Codes
(120.0280) Instrumentation, measurement, and metrology : Remote sensing and sensors
(120.3180) Instrumentation, measurement, and metrology : Interferometry

ToC Category:
Instrumentation, Measurement, and Metrology

Original Manuscript: July 18, 2012
Manuscript Accepted: August 10, 2012
Published: September 14, 2012

Xiaoke Wan and Jian Ge, "Dispersed single-phase-step Michelson interferometer for Doppler imaging using sunlight," Opt. Lett. 37, 3912-3914 (2012)

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