18 October 2006 Long-period gratings in photonic crystal fibers for sensing of external refractive index change and macro-bending
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Abstract
Long-period gratings (LPGs) have been fabricated in endlessly single mode photonic crystal fibers (ESM-PCFs) utilizing focused CO2 laser irradiation and residual stress relaxation technique. The responses of the ESM-PCF-LPGs to external refractive index and applied bending curvature have been investigated. As compared with the conventional fiber-based LPGs inscribed under the same condition, the ESM-PCF-LPGs exhibit higher sensitivity to external refractive index change and macro-bending, making them attractive candidates for chemical and biological sensing applications.
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Zonghu He, Zonghu He, Yinian Zhu, Yinian Zhu, Ryan T. Bise, Ryan T. Bise, Henry Du, Henry Du, } "Long-period gratings in photonic crystal fibers for sensing of external refractive index change and macro-bending", Proc. SPIE 6369, Photonic Crystals and Photonic Crystal Fibers for Sensing Applications II, 636908 (18 October 2006); doi: 10.1117/12.688355; https://doi.org/10.1117/12.688355
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