Highly sensitive vernier sensor based on Chirp Grating Fabry-Perot Interferometer (CG-FPI) for the strain detection in lithium polymer (LiPo) batteries
Document Type
Article
Publication Date
2-1-2023
Abstract
In this work, a highly sensitive vernier sensor based on Chirp Grating Fabry-Perot Interferometers (CG-FPI) is experimentally demonstrated for the detection of small strain signal in Lithium Polymer (LiPo) battery. The vernier sensor is assembled from two CG-FPIs with small difference in free-spectral range, vernier effect is achieved from the overlap of both reflection spectra that has a magnified strain sensitivity is similar to 33.22 pm/mu epsilon. Each CG-FPI comprises of two identical chirped gratings inscribed in a single mode fiber to produce a well-defined 8.5 nm-wide interference spectrum. This enables additional Fiber Bragg Grating (FBG) sensors to be incorporated into the same fiber sensor network without crosstalk and for better wavelength division multiplexing (WDM) efficiency. The fabrication is entirely based on grating inscription process without any physical modification on the fiber structure. In comparison with the standard FBGs, the proposed sensor offers 88.4% lower normalized root mean s
Keywords
Chirp grating, Fabry-perot interferometer, Optical fiber strain sensor, Lithium polymer battery
Divisions
fsktm,Computer,Science,PHYSICS,photonics
Publication Title
Sensors and Actuators A-Physical
Volume
350
Publisher
Elsevier Science SA
Publisher Location
PO BOX 564, 1001 LAUSANNE, SWITZERLAND