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Transcript
Optical Fiber with Tunable Birefringence using Pressurized Liquid Capillaries Patent No. 7,489,847 Background: Previously, in-fiber optical isolators suitable for high power operation utilize Faraday rotation in a birefringent fused-silica single-mode optical fiber whose polarization beat length has been matched to the period of an array of permanent magnets arranged in a repelling configuration. It would be desirable to be able to vary the stress in a portion of an optical fiber segment and to vary the birefringence in the entire length of the segment. For information about this technology, please contact: Jeff Abbott 520-743-6878 [email protected] Technology Description: AFRL has developed a single-mode optical fiber segment incorporating liquid-filled holes parallel to the core that are sealed at each end. Heating the liquid produces stress in the fiber and increases the birefringence level. Market Applications: - Optical fibers with photonic crystal fibers (PCF’s) - Simulated Raman scattering in a gas Key Advantage: - Ability to vary stress in a portion of optical fiber (vary birefringence in the entire length of the segment) Key Words: Optical Fibers, Faraday Rotation
