Sensing properties of fiber Bragg gratings in small-core Ge-doped photonic crystal fibers |
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| Authors: | Yiping Wang Hartmut Bartelt Reinhardt Willsch Michael Kautz Manfred Rothhardt |
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| Institution: | a Institute of Photonic Technology, Albert-Einstein-Str. 9, 07745 Jena, Germany
b State Key Lab of Advanced Optical Communication Systems and Networks, Shanghai Jiao Tong University, Shanghai 200240, PR China |
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| Abstract: | We report about fiber Bragg gratings (FBGs) inscribed in two different types of small-core Ge-doped photonic crystal fibers with a UV laser. Sensing properties of the FBGs were systematically investigated by means of demonstrating the responses of Bragg wavelengths to temperature, strain, bending, and transverse-loading. The Bragg wavelength of the FBGs shifts toward longer wavelengths with increasing temperature, tensile strain, and transverse-loading. Moreover, the bending and transverse-loading properties of the FBGs are sensitive to the fiber orientations. The reasonable analyses for these sensing properties also are presented. |
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| Keywords: | Fiber Bragg gratings Photonic crystal fibers Optical fiber sensors |
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