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Optics Letters

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  • Vol. 36, Iss. 6 — Mar. 15, 2011
  • pp: 906–908

Fundamental frequency noise properties of extended cavity erbium fiber lasers

G. A. Cranch and G. A. Miller  »View Author Affiliations


Optics Letters, Vol. 36, Issue 6, pp. 906-908 (2011)
http://dx.doi.org/10.1364/OL.36.000906


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Abstract

A multimode linear cavity and a single-mode unidirectional ring cavity fiber laser with meter-long cavity lengths are shown to exhibit frequency noise limited by fundamental thermodynamic noise from 100 Hz to 100 kHz . Their measured spectra agree closely with theoretically derived thermodynamic noise and the characteristic dependence of the frequency noise power spectrum on the inverse of the cavity length is observed. The unidirectional ring laser exhibits a frequency noise of 2 Hz / Hz 1 / 2 at 1 kHz , one of the lowest published values to date from a free-running laser. The multimode linear cavity laser is shown to be a suitable candidate for thermal-noise-limited, meter-long fiber laser strain sensors with a strain resolution of 14 f ϵ / Hz 1 / 2 at 1 kHz .

OCIS Codes
(030.1640) Coherence and statistical optics : Coherence
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(140.3510) Lasers and laser optics : Lasers, fiber
(140.3560) Lasers and laser optics : Lasers, ring
(060.3510) Fiber optics and optical communications : Lasers, fiber

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: January 6, 2011
Manuscript Accepted: February 4, 2011
Published: March 9, 2011

Citation
G. A. Cranch and G. A. Miller, "Fundamental frequency noise properties of extended cavity erbium fiber lasers," Opt. Lett. 36, 906-908 (2011)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-36-6-906

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