Fabrication of Optical Stretchable Curvature Sensors With High Linearity

Bing Sun*, Fei Li, Fanbo Feng, Kai Wan, Kaiming Zhou, Zuxing Zhang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


This article presents an optical approach for fabricating stretchable curvature sensors that possess a high degree of reproducibility, can detect diverse curvatures, and can accommodate large strain ranges, while also being cost-effective and straightforward. The method involves the removal of the cladding and core of a single-mode fiber via a side-polishing technique, followed by encapsulation in a PDMS film with hundreds of micros. The resulting structure permits multimode interference effects that enable the sensor to exhibit high linearity and minimal hysteresis in its sensitive and reversible detection of bending deformations. Additionally, the unique mechanical and sensing properties of the sensor make it well-suited for integration into clothing or placement on skin surfaces to monitor a range of human activities, from subtle physiological signals such as wrist pulses to extensive motions involving joint bending and hand gestures.

Original languageEnglish
Pages (from-to)6423-6427
Number of pages5
JournalJournal of Lightwave Technology
Issue number19
Early online date7 Sept 2023
Publication statusPublished - 1 Oct 2023

Bibliographical note

Funding: This work was supported in part by the China Association
for Science and Technology (CAST) through Outstanding Chinese and Foreign
Youth Exchange Program, in part by Jiangsu Province Science and Technology,
in part by Association Youth Science and Technology Talent Promotion, in
part by the Nanjing University of Posts and Telecommunications (Dingxin)
through 1311 Talents Program, in part by the Science Foundation of Nanjing
University of Posts and Telecommunications under Grants NY219046 and
NY222139, and in part by Marie Skłodowska-Curie Individual Fellowships in
the European Union’s Horizon 2020 Research and Innovation Programme under
Grant 891685

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  • Bending
  • Curvature
  • Optical fiber sensors
  • Optical fibers
  • Optical films
  • Optical sensors
  • PDMS film
  • Sensors
  • Strain
  • multimode interference
  • side-polishing


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