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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 20 — Sep. 24, 2012
  • pp: 21932–21939

Continuous real-time correction and averaging for frequency comb interferometry

Julien Roy, Jean-Daniel Deschênes, Simon Potvin, and Jérôme Genest  »View Author Affiliations

Optics Express, Vol. 20, Issue 20, pp. 21932-21939 (2012)

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Interferograms from a dual-comb spectrometer are continuously corrected and averaged in real-time. The algorithm is implemented on a field-programmable gate array (FPGA) development board. The chosen approach and the algorithm are described. Measurements with high signal-to-noise ratio, resolution and bandwidth are shown to demonstrate the accuracy of the optical referencing and the processing algorithm with 24 hours of averaging time, reaching a signal to noise ratio of 10,750,000 (>21 bits) in the interferogram and 316,000 in the spectrum at 100 MHz resolution. An interferogram where signal dominates the noise over the full delay range imposed by the 100 MHz repetition rate is reported for the first time.

© 2012 OSA

OCIS Codes
(120.3940) Instrumentation, measurement, and metrology : Metrology
(120.4640) Instrumentation, measurement, and metrology : Optical instruments
(140.4050) Lasers and laser optics : Mode-locked lasers
(300.6300) Spectroscopy : Spectroscopy, Fourier transforms

ToC Category:
Instrumentation, Measurement, and Metrology

Original Manuscript: July 31, 2012
Revised Manuscript: August 30, 2012
Manuscript Accepted: August 30, 2012
Published: September 11, 2012

Julien Roy, Jean-Daniel Deschênes, Simon Potvin, and Jérôme Genest, "Continuous real-time correction and averaging for frequency comb interferometry," Opt. Express 20, 21932-21939 (2012)

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