Contactless vital signs monitoring based on few-mode and multi-core fibers
Journal Title: Opto-Electronic Advances - Year 2020, Vol 3, Issue 5
Abstract
Few-mode and multi-core fibers are proposed and demonstrated for contactless vital signs monitoring in this paper. In-line optical fiber interferometers using few-mode and multi-core fibers are designed and offset splicing is utilized for mode excitation. Extinction ratio and insertion loss are analyzed experimentally under different offset distances. The fabricated in-line interferometers are packaged under the mattress to realize contactless vital signs signals collection. By using filtering techniques, both respiration and heartbeat signals can be recovered successfully, and respiration as well as heartbeat ratio are obtained. Mode excitation and interference are theoretically analyzed in few-mode fiber while curvature sensing experiments using multi-core fiber interferometer are performed to verify its excellent performance on vital signs monitoring. The successful demonstration on contactless vital signs monitoring makes few-mode and multi-core fibers promising candidates for healthcare applications.
Authors and Affiliations
Fengze Tan, Weimin Lyu, Shuyang Chen, Zhengyong Liu, Changyuan Yu
Keywords
Related Articles
- EP ID EP684076
- DOI 10.29026/oea.2020.190034
- Views 144
- Downloads 0
Speckle reduction using phase plate array and lens array
In this paper, a solution for speckle reduction using phase plate array (PPA) and lens array (LA) in a motionless way is proposed. The specially designed PPA is composed of sub-phase plates, which are constituted by phas...
Printing photovoltaics by electrospray
Solution processible photovoltaics (PV) are poised to play an important role in scalable manufacturing of low-cost solar cells. Electrospray is uniquely suited for fabricating PVs due to its several desirable characteris...
Direct laser interference patterning of nonvolatile magnetic nanostruc-tures in Fe60Al40 alloy via disorder-induced ferromagnetism
Current magnetic memories are based on writing and reading out the domains with opposite orientation of the magnetization vector. Alternatively, information can be encoded in regions with a different value of the saturat...
A novel spoof surface plasmon polariton structure to reach ultra-strong field confinements
Ultrathin corrugated metallic structures have been proved to support spoof surface plasmon polariton (SPP) modes on two-dimension (2D) planar microwave circuits. However, to provide stronger field confinement, larger wid...
Compact pulsed thulium-doped fiber laser for topographical patterning of hydrogels
We report the generation of high energy 2 μm picosecond pulses from a thulium-doped fiber master oscillator power amplifier system. The all-fiber configuration was realized by a flexible large-mode area photonic crystal...