Biconical-taper-assisted fiber interferometer with modes coupling enhancement for high-sensitive curvature measurement

Jianghai Wo, Qizhen Sun*, Xiaolei Li, Deming Liu, Perry Ping Shum

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

A modal interferometer based on multimode-singlemode-multimode fiber structure built with a biconical taper for fiber curvature measurement is proposed and experimentally demonstrated. Due to the tapered singlemode fiber acting as a high-efficient mode power converter to enhance the modes coupling, curvature sensor with improved sensitivity is achieved by monitoring the defined fringe visibility of the interference spectrum. The measuring range can be tuned by changing the waist diameter of the fiber taper. Meanwhile, the sensor shows an intrinsic ability to overcome the influence of temperature cross-sensitivity and the power fluctuation of light source. The advantages of easy fabrication, high-quality spectrum with improved sensitivity, and small hysteresis will provide great potential for practical applications of the sensor.

Original languageEnglish
Pages (from-to)1-8
Number of pages8
JournalApplied Physics B
Volume115
Issue number1
Early online date14 Jul 2013
DOIs
Publication statusPublished - 1 Apr 2014

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