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Tunable optical fiber filters with magnetic fluids

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6 Author(s)
Liao, Weijun ; Institute of Optics and Photonics, Department of Physics, The State Key Laboratory on Fiber-Optic Local Area Communication Networks and Advanced Optical Communication Systems, Shanghai JiaoTong University 800, Dong Chuan Road, Shanghai, 200240, China ; Chen, Xianfeng ; Yuping Chen ; Pu, Shengli
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Your organization might have access to this article on the publisher's site. To check, click on this link:http://dx.doi.org/+10.1063/1.2103401 

This letter presents a tunable optical fiber filter based on a long-period grating (LPG) by applying a magnetic field on a magnetic nanoparticle fluid. The movement of the magnetic fluid jacket surrounding the fiber cladding controlled by an applied magnetic field results in a variation of the external index between that of the magnetic fluid and air. As a result, the attenuation band of the LPG is shifted. The observed center wavelength shift of the attenuation band is as large as 7 nm, which can cover eight dense wavelength division multiplexing channels (100 GHz channel spacing). Repeatable transport of a magnetic fluid at a switching rate of 1 Hz is demonstrated.

Published in:

Applied Physics Letters  (Volume:87 ,  Issue: 15 )

Date of Publication:

Oct 2005

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