Compact fiber-optic curvature sensor based on super-mode interference in a seven-core fiber

    Authors

    G. Salceda-Delgado; A. Van Newkirk; J. E. Antonio-Lopez; A. Martinez-Rios; A. Schulzgen;R. A. Correa

    Comments

    Authors: contact us about adding a copy of your work at STARS@ucf.edu

    Abbreviated Journal Title

    Opt. Lett.

    Keywords

    PHOTONIC CRYSTAL FIBER; MACH-ZEHNDER INTERFEROMETER; MULTICORE FIBER; OPTICAL-FIBER; TEMPERATURE; TAPERS; LOOP; Optics

    Abstract

    A compact, low loss, and highly sensitive optical fiber curvature sensor is presented. The device consists of a fewmillimeter- long piece of seven-core fiber spliced between two single-mode fibers. When the optical fiber device is kept straight, a pronounced interference pattern appears in the transmission spectrum. However, when the device is bent, a spectral shift of the interference pattern is produced, and the visibility of the interference notches changes. This allows for using either visibility or spectral shift for sensor interrogation. The dynamic range of the device can be tailored through the proper selection of the length of the seven-core fiber. The effects of temperature and refractive index of the external medium on the response of the curvature sensor are also discussed. Linear sensitivity of about 3000 nm/mm(-1) for bending was observed experimentally. (C) 2015 Optical Society of America

    Journal Title

    Optics Letters

    Volume

    40

    Issue/Number

    7

    Publication Date

    1-1-2015

    Document Type

    Article

    Language

    English

    First Page

    1468

    Last Page

    1471

    WOS Identifier

    WOS:000352154600086

    ISSN

    0146-9592

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