Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/162764
Title: In-situ adjustable fiber-optic piezometer based on parallelly structured external Fabry-Perot interferometers with Vernier effect and its harmonics
Authors: Wang, Shun
Yang, Yaowen
Wu, Lei
Mohanty, Lipi
Jin, Rui-Bo
Zhang, Liang
Lu, Peixiang
Keywords: Engineering::Civil engineering
Issue Date: 2021
Source: Wang, S., Yang, Y., Wu, L., Mohanty, L., Jin, R., Zhang, L. & Lu, P. (2021). In-situ adjustable fiber-optic piezometer based on parallelly structured external Fabry-Perot interferometers with Vernier effect and its harmonics. Optics Express, 29(26), 42800-42812. https://dx.doi.org/10.1364/OE.445192
Journal: Optics Express
Abstract: Translating interferometric applications into practical field use with the required flexible precision and measurement range, is a recognized challenge. We report an in-situ adjustable fiber-optic piezometer based on parallelly structured external Fabry-Perot interferometers (EFPIs) with the Vernier effect and its harmonics. By accommodating the EFPI structure with an adjustable and a fixed cavity length, the EFPIs are utilized as a referencing fiber piezometer (RFP), and a sensing fiber piezometer (SFP), respectively. The Vernier effect with amplified sensitivity is formed by connecting the RFP and SFP in parallel via a 3 dB optical coupler. By simply tuning the cavity length of the RFP, the magnification factor M of the Vernier effect is in-situ continuously adjustable. Using the two prototypes SFP1 and SFP2, water level measurement is performed in the fundamental Vernier effect (FVE) mode and the harmonic Vernier effect (HVE) mode. Experimental results demonstrate that in the FVE mode, the sensitivity can be predictably tuned from -0.15 nm/cm to -7.02 nm/cm with M=1∼48 for SFP1, and -0.31 nm/cm to -7.22 nm/cm with M=1∼23 for SFP2. In the HVE mode, the sensitivity can be further enhanced as high as -9.08 nm/cm, while the sensing performance fluctuates during the adjusting process. Benefiting from the merits of in-situ adjustable sensitivity and measurement range, simplicity of composition, robustness, and remote sensing capability, the proposed scheme can be applied to various practical applications.
URI: https://hdl.handle.net/10356/162764
ISSN: 1094-4087
DOI: 10.1364/OE.445192
Rights: © 2021 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:CEE Journal Articles

Files in This Item:
File Description SizeFormat 
oe-29-26-42800.pdf4 MBAdobe PDFView/Open

SCOPUSTM   
Citations 20

7
Updated on Nov 26, 2022

Web of ScienceTM
Citations 50

3
Updated on Nov 18, 2022

Page view(s)

12
Updated on Nov 30, 2022

Download(s)

4
Updated on Nov 30, 2022

Google ScholarTM

Check

Altmetric


Plumx

Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.