Research Papers

High birefringence triangular optical nanowire in suspended-core fiber for temperature sensing

[+] Author Affiliations
Ricardo M. André

Instituto de Engenharia de Sistemas e Computadores do Porto, Rua do Campo Alegre 687, 4169-007 Porto, Portugal

University of Porto, Physics and Astronomy Department, Faculty of Science, Rua do Campo Alegre 687, 4169-007 Porto, Portugal

Martin Becker

IPHT, Institute for Photonic Technology, D-07745 Jena, Germany

Kay Schuster

IPHT, Institute for Photonic Technology, D-07745 Jena, Germany

Manfred Rothhardt

IPHT, Institute for Photonic Technology, D-07745 Jena, Germany

Hartmut Bartelt

IPHT, Institute for Photonic Technology, D-07745 Jena, Germany

Manuel B. Marques

Instituto de Engenharia de Sistemas e Computadores do Porto, Rua do Campo Alegre 687, 4169-007 Porto, Portugal

University of Porto, Physics and Astronomy Department, Faculty of Science, Rua do Campo Alegre 687, 4169-007 Porto, Portugal

Orlando Frazão

Instituto de Engenharia de Sistemas e Computadores do Porto, Rua do Campo Alegre 687, 4169-007 Porto, Portugal

J. Nanophoton. 7(1), 073088 (Jul 08, 2013). doi:10.1117/1.JNP.7.073088
History: Received February 21, 2013; Revised June 3, 2013; Accepted June 11, 2013
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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 103. 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 56.2pm/K using a triangular nanowire of 810 nm in-circle diameter when compared with that of a conventional untapered SCF whose temperature sensitivity is 2.1pm/K.

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© 2013 Society of Photo-Optical Instrumentation Engineers

Citation

Ricardo M. André ; Martin Becker ; Kay Schuster ; Manfred Rothhardt ; Hartmut Bartelt, et al.
"High birefringence triangular optical nanowire in suspended-core fiber for temperature sensing", J. Nanophoton. 7(1), 073088 (Jul 08, 2013). ; http://dx.doi.org/10.1117/1.JNP.7.073088


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