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Demonstration of an Ultra-Wide Wavelength Tunable Band Rejection Filter Implemented with Photonic Crystal Fiber
Jinchae KIM Gyeong-Jun KONG Un-Chul PAEK Kyung Shik LEE Byeong Ha LEE
IEICE TRANSACTIONS on Electronics
Publication Date: 2005/05/01
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Joint Special Section on Recent Progress in Optoelectronics and Communications)
Category: Optical Fibers, Cables and Fiber Devices
photonic crystal fiber, long-period fiber grating, mode coupling, band-rejection filter,
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Press-induced long-period fiber gratings exhibiting strong core-to-cladding mode coupling were formed in photonic crystal fiber. Only one resonance peak was observed over a 600 nm spectral range and the resonant wavelength was tuned over the whole range by tilting a groove plate before pressing the fiber. The resonant wavelength decreased with increasing periodicity of the grating, which was opposite to the trend of the step-index conventional optical fiber. Meanwhile, the resonant wavelength increased with increasing the ambient refractive index, which was also opposite to that of the conventional optical fiber.