학술논문
Few-layer MOS2-deposited flexible side-polished fiber Bragg grating bending sensor for pulse detection
Document Type
Conference
Author
Source
2017 19th International Conference on Solid-State Sensors, Actuators and Microsystems (TRANSDUCERS) Solid-State Sensors, Actuators and Microsystems (TRANSDUCERS), 2017 19th International Conference on. :2007-2010 Jun, 2017
Subject
Language
ISSN
2167-0021
Abstract
We demonstrate a flexible side-polished fiber Bragg grating (FBG)-based bending sensor involving the deposition of MoS 2 onto the FBG fiber core, with a D-shaped zone of ∼54 μm depth and ∼15 mm length. The MoS 2 overlay could enable the sensor a higher sensitivity to bending strain because of the overlay-induced additional refractive index changes in the evanescent field interaction with fiber gratings. The bending strain test shows that the developed sensor can achieve one order of wavelength shift higher than that of conventional bare FBG at larger bending deformation. Furthermore, the extracted subtle wrist pulse signal validates the great potential of MoS 2 -based side-polished fibers as wearable sensors for human activity detection.