Bending insensitivity of fiber Bragg gratings in suspended-core optical fibers |
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| Authors: | Jewart Charles M Chen Tong Lindner Eric Fiebrandt Julia Rothhardt Manfred Schuster Kay Kobelke Jens Bartelt Hartmut Chen Kevin P |
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| Affiliation: | Department of Electrical and Computer Engineering, University of Pittsburgh, 3700 O’Hara Street, Pittsburgh, Pennsylvania 15261, USA. |
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| Abstract: | This Letter presents simulation and experimental results that explore bending insensitivity of fiber Bragg gratings in suspended-core optical fibers. The implementation of thin silica bridge in the fibers enhances index contrast of the fiber core and reduces bending-induced strain transfer to the fiber core. This fiber design lead to a reduction of over 7 times in strain-induced fiber Bragg grating resonant peak shifts in the suspended-core fiber compared with that in standard telecommunication fiber, and an 0.14 dB bending loss at a bending radius of 6.35 mm. |
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