Flexible and Wearable Optical System Based on U‐Shaped Cascaded Microfiber Interferometer. Issue 3 (6th October 2022)

• Record Type: Journal Article
• Authors: Mishra, Pratik; Kumar, Hemant; Sahu, Subrat; Jha, Rajan
• Is Part Of: Advanced materials technologies. Volume 8:Issue 3(2023)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-10-06
• Subjects: flexible substrate -- microfiber interferometry -- optical bending and temperature sensors -- wearable devices; Materials science -- Periodicals; Technological innovations -- Periodicals; Materials science; Technological innovations; Periodicals; 620.1105
• DOI: 10.1002/admt.202200661
• Languages: English
• ISSNs: 2365-709X

Abstract

Abstract: Future wearable devices for health monitoring, robotics, and ultraprecise industrial positioning necessitate flexible optical systems. Here, an optical microfiber interferometer‐based wearable system is demonstrated with wavelength interrogation that overcomes the limits of commonly reported electrical, optical, and material‐based flexible devices. The microfiber in a finely tuned configuration is enclosed in polydimethylsiloxane (PDMS) thin film to provide a means of controlling interference between fundamental and higher‐order modes. Using this approach, it is possible to create a simple, adaptable, and cost‐effective optical device with a direction recognizable bending sensitivity of up to 1.01 nm per degree, and remarkable temperature sensitivity of −3.07 nm °C −1 . The ultrahigh sensitivity, mechanical robustness, and outstanding flexible and biocompatible nature make this sensor system a leading candidate for wearable medical devices for elder‐care facilities, physiological monitoring, athletic training, and rehabilitation programs. Abstract : This article describes a simple, efficient, flexible, and economical optical wearable system based on optical microfiber interferometer for human physiological monitoring/rehabilitation programs. This skin mountable and customizable system has the potential to overcome the limitations of widely reported electronics, optical‐, and material‐based flexible devices, which can be used.