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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 10 — May. 20, 2013
  • pp: 11794–11807

All-optical, thermo-optical path length modulation based on the vanadium-doped fibers

Ziga Matjasec, Stanislav Campelj, and Denis Donlagic  »View Author Affiliations

Optics Express, Vol. 21, Issue 10, pp. 11794-11807 (2013)

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This paper presents an all-fiber, fully-optically controlled, optical-path length modulator based on highly absorbing optical fiber. The modulator utilizes a high-power 980 nm pump diode and a short section of vanadium-co-doped single mode fiber that is heated through absorption and a non-radiative relaxation process. The achievable path length modulation range primarily depends on the pump’s power and the convective heat-transfer coefficient of the surrounding gas, while the time response primarily depends on the heated fiber’s diameter. An absolute optical length change in excess of 500 µm and a time-constant as short as 11 ms, were demonstrated experimentally. The all-fiber design allows for an electrically-passive and remote operation of the modulator. The presented modulator could find use within various fiber-optics systems that require optical (remote) path length control or modulation.

© 2013 OSA

OCIS Codes
(060.2270) Fiber optics and optical communications : Fiber characterization
(060.2280) Fiber optics and optical communications : Fiber design and fabrication
(060.2300) Fiber optics and optical communications : Fiber measurements
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(060.2400) Fiber optics and optical communications : Fiber properties
(060.4080) Fiber optics and optical communications : Modulation
(060.5060) Fiber optics and optical communications : Phase modulation
(140.6810) Lasers and laser optics : Thermal effects
(230.4110) Optical devices : Modulators

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: March 21, 2013
Revised Manuscript: April 26, 2013
Manuscript Accepted: April 29, 2013
Published: May 7, 2013

Ziga Matjasec, Stanislav Campelj, and Denis Donlagic, "All-optical, thermo-optical path length modulation based on the vanadium-doped fibers," Opt. Express 21, 11794-11807 (2013)

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