8 July 2013 High birefringence triangular optical nanowire in suspended-core fiber for temperature sensing
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Abstract
Triangular nanowires that present a high birefringence and a very strong confinement were fabricated by tapering suspended-core fibers (SCFs) down to core diameters below 1000 nm. Each nanowire presented a high birefringence with an order of magnitude of 10 −3 . As the spectra of the SCF tapers inserted in fiber loop mirrors can be used to generate a sinusoidal interference pattern from the two main modes (fast and slow axis), a nanowire was employed as a sensing element in a Sagnac interferometer for measuring temperature. Temperature sensitivity was determined to be -56.2  pm/K using a triangular nanowire of 810 nm in-circle diameter when compared with that of a conventional untapered SCF whose temperature sensitivity is −2.1  pm/K .
© 2013 Society of Photo-Optical Instrumentation Engineers (SPIE)
Ricardo M. Andre, Martin Becker, Kay Schuster, Manfred Rothhardt, Hartmut Bartelt, Manuel B. Marques, Orlando Frazão, "High birefringence triangular optical nanowire in suspended-core fiber for temperature sensing," Journal of Nanophotonics 7(1), 073088 (8 July 2013). https://doi.org/10.1117/1.JNP.7.073088
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