Dual tapered optical fiber for simultaneous detection of curvature and strain

J.R. Ek-Ek, D. Jauregui-Vazquez, J.P. Korterik, M. Benedictus, F. Martinez-Pinon, H.L. Offerhaus, J.A. Alvarez-Chavez*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

7 Citations (Scopus)
34 Downloads (Pure)


We present a study of simultaneous detection of curvature and strain in optical fiber. This contains a micro tapered section and a nano tapered section. The transmission spectrum shows interference of multiple modes, and the frequency of the modulation can be used to distinguish and monitor specific physical parts of the fiber structure. The curvature detection is achieved using one specific modulation frequency component; this component shows an intensity modulation with a sensitivity of 0.26 dB/m−1. The strain information is extracted by applying a phase analysis over a second spatial frequency component; this analysis shows a sensitivity close to 8 mrad/με. The strain phase analysis exhibits a linear response, and the intensity curvature data indicates an exponential model. The proposed signal analysis can be employed for simultaneous detection in optical fiber interferometric sensors.
Original languageEnglish
Article number102843
JournalOptical Fiber Technology
Early online date11 Feb 2022
Publication statusPublished - 1 Mar 2022


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