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Advances in OptoElectronics
Volume 2010, Article ID 586986, 7 pages
Research Article

Model and Simulation of a Tunable Birefringent Fiber Using Capillaries Filled with Liquid Ethanol for Magnetic Quasiphase Matching In-Fiber Isolator

Advanced Electric Laser Branch, Air Force Research Laboratory, Directed Energy Directorate, Kirtland Air Force Base, NM 87117, USA

Received 30 November 2009; Revised 16 February 2010; Accepted 25 March 2010

Academic Editor: Iyad Dajani

Copyright © 2010 Clint Zeringue and Gerald T. Moore. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


A technique to tune a magnetic quasi-phase matching in-fiber isolator through the application of stress induced by two mutually orthogonal capillary tubes filled with liquid ethanol is investigated numerically. The results show that it is possible to “tune” the birefringence in these fibers over a limited range depending on the temperature at which the ethanol is loaded into the capillaries. Over this tuning range, the thermal sensitivity of the birefringence is an order-of-magnitude lower than conventional fibers, making this technique well suited for magnetic quasi-phase matching.