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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 48, Iss. 4 — Feb. 1, 2009
  • pp: 704–707

Thermoacoustic optical path length stabilization in a single-mode optical fiber

Wojciech Lewoczko-Adamczyk, Max Schiemangk, Holger Müller, and Achim Peters  »View Author Affiliations

Applied Optics, Vol. 48, Issue 4, pp. 704-707 (2009)

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We present a simple technique to actively stabilize the optical path length in an optical fiber. A part of the fiber is coated with a thin, electrically conductive layer, which acts as a heater. The optical path length is thus modified by temperature-dependent changes in the refractive index and the mechanical length of the fiber. For the first time, we measure the dynamic response of the optical path length to the periodic changes of temperature and find it to be in agreement with our former theoretical prediction. The fiber’s response to the temperature changes is determined by the speed of sound in quartz rather than by slow thermal diffusion. Making use of this fact, we succeeded in actively stabilizing the optical path length with a closed-loop bandwidth of 3.8 kHz .

© 2009 Optical Society of America

OCIS Codes
(060.2270) Fiber optics and optical communications : Fiber characterization
(060.4080) Fiber optics and optical communications : Modulation

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: October 6, 2008
Manuscript Accepted: November 28, 2008
Published: January 21, 2009

Wojciech Lewoczko-Adamczyk, Max Schiemangk, Holger Müller, and Achim Peters, "Thermoacoustic optical path length stabilization in a single-mode optical fiber," Appl. Opt. 48, 704-707 (2009)

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