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Optics Letters

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  • Editor: Alan E. Willner
  • Vol. 35, Iss. 24 — Dec. 15, 2010
  • pp: 4223–4225

Narrow-linewidth chirped frequency comb from a frequency-shifted feedback Ti:sapphire laser seeded by a phase-modulated single-frequency fiber laser

Matthias F. Brandl and Oliver D. Mücke  »View Author Affiliations


Optics Letters, Vol. 35, Issue 24, pp. 4223-4225 (2010)
http://dx.doi.org/10.1364/OL.35.004223


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Abstract

Frequency-shifted feedback (FSF) lasers have emerged as powerful tools for precision distance metrology. At the output of a Michelson interferometer, the detected rf spectra of the FSF laser light contain a length-dependent heterodyne beat signal whose linewidth ultimately limits the achievable accuracy of length measurements. Here, we demonstrate a narrow-linewidth chirped frequency comb from an FSF Ti:sapphire ring laser seeded by a phase-modulated, ultra-low-phase-noise, single-frequency fiber laser. We experimentally investigate the influence of the seed laser linewidth on the resulting width and shape of the length-dependent rf beat signal. An ultranarrow heterodyne beat linewidth of < 20 Hz is observed.

© 2010 Optical Society of America

OCIS Codes
(120.3930) Instrumentation, measurement, and metrology : Metrological instrumentation
(140.3590) Lasers and laser optics : Lasers, titanium

ToC Category:
Instrumentation, Measurement, and Metrology

History
Original Manuscript: September 21, 2010
Revised Manuscript: November 12, 2010
Manuscript Accepted: November 15, 2010
Published: December 15, 2010

Citation
Matthias F. Brandl and Oliver D. Mücke, "Narrow-linewidth chirped frequency comb from a frequency-shifted feedback Ti:sapphire laser seeded by a phase-modulated single-frequency fiber laser," Opt. Lett. 35, 4223-4225 (2010)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-35-24-4223


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