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Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 35, Iss. 3 — Feb. 1, 2010
  • pp: 432–434

Ultrahigh resolution spectral analysis based on a Brillouin fiber laser

François Mihélic, Denis Bacquet, Jaouad Zemmouri, and Pascal Szriftgiser  »View Author Affiliations


Optics Letters, Vol. 35, Issue 3, pp. 432-434 (2010)
http://dx.doi.org/10.1364/OL.35.000432


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Abstract

We report what we believe to be a novel experimental heterodyne technique for the spectral analysis of continuous optical wave sources. The achieved resolution is as low as the kilohertz level, with a dynamic range in excess of 90 dB. The technique is based on a heterodyne detection between the source under test (SUT) and a Brillouin fiber laser generated by this SUT. Contrary to standard self-heterodyne techniques only a few tens of meters of optical fiber is required without the need of any optical modulators. This spectrometer has been used to characterize a distributed-feedback laser diode and a Brillouin fiber laser.

© 2010 Optical Society of America

OCIS Codes
(070.4790) Fourier optics and signal processing : Spectrum analysis
(190.4370) Nonlinear optics : Nonlinear optics, fibers
(290.5900) Scattering : Scattering, stimulated Brillouin

ToC Category:
Nonlinear Optics

History
Original Manuscript: November 24, 2009
Revised Manuscript: December 24, 2009
Manuscript Accepted: December 28, 2009
Published: January 29, 2010

Citation
François Mihélic, Denis Bacquet, Jaouad Zemmouri, and Pascal Szriftgiser, "Ultrahigh resolution spectral analysis based on a Brillouin fiber laser," Opt. Lett. 35, 432-434 (2010)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-35-3-432


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  13. The primary reason of this insulation is to avoid instabilities and laser mode hops. However, as there is no active control of the spectrometer temperature, it is also useful to prevent the frequency drifts of the Stokes wave associated with any temperature drifts (around 1 MHz/K). In fact, the zero frequency of the spectra we observe can be automatically centered to the Stokes frequency, thus rendering the device unaffected by long term slow drifts, provided they are sufficiently slow. With a 1 MHz/K frequency drift and a 1 kHz resolution, the temperature drift must be less than 1 mK during the measurement time.

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