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Single nanosecond-pulse production of polymeric fiber Bragg gratings for biomedical applications

Authors :
Chi-Fung Jeff Pun
Xin Cheng
Julien Bonefacino
Hwa Yaw Tam
Dinusha Serandi Gunawardena
Source :
Optics Express. 28:33573
Publication Year :
2020
Publisher :
Optica Publishing Group, 2020.

Abstract

In this study, we present first-time fabrication of FBGs in all ZEONEX-based SMPOFs with a single 25 ns pulse of 248 nm UV irradiation over a 12-month period, which opens up new frontiers in optics and photonics for the effective fabrication of polymer optical fiber Bragg gratings (POFBGs), permitting mass producibility of them. POFBGs were characterized by subjecting them to various physical parameters including temperature and tensile strain. Strain responses of FBGs with similar grating strengths fabricated with 248 nm and 325 nm He-Cd laser irradiations were explored over a year to demonstrate their long-term stability and applicability. Owing to the unique features of the proposed sensing device fabricated by embedding POFBGs in silicone rubber, a good performance in the detection of human heart rate with an amplitude of 4 pm, which is 4 times higher compared to that of silica single mode fiber (SMF) was demonstrated. The response of the sensing device during a human respiration process was also explored where exhalation and inhalation were monitored and distinguished while the breath was held. These revelations signify the importance of ZEONEX-based POFBGs, which allow consistent and effective grating fabrication and are highly promising in the foreseeable future for biomedical applications.

Details

ISSN :
10944087
Volume :
28
Database :
OpenAIRE
Journal :
Optics Express
Accession number :
edsair.doi.dedup.....fb39eaeeb4ad9261a87066eb8fd143cb
Full Text :
https://doi.org/10.1364/oe.408744