Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group
Journal Home About Issues in Progress Current Issue All Issues Feature Issues

Simultaneous measurement of temperature and strain using dual long-period fiber gratings with controlled temperature and strain sensitivities

Young-Geun Han, Sang Bae Lee, Chang-Seok Kim, Jin. U. Kang, Un-Chul Paek, and Youngjoo Chung

Open Access Open Access

Abstract

Unambiguous simultaneous measurement of strain and temperature based on dual long-period fiber gratings by controlling their thermal and strain sensitivities is proposed and experimentally demonstrated. The difference in the wavelength peak shift and the separation with the variation of strain and temperature allows discrimination between the strain and temperature effects, respectively.

©2003 Optical Society of America

Full Article  |  PDF Article
More Like This
Simultaneous strain and temperature measurement by cascading few-mode fiber and single-mode fiber long-period fiber gratings

Li Wang, Weigang Zhang, Biao Wang, Lei Chen, Zhiyong Bai, Shecheng Gao, Jieliang Li, Yongji Liu, Liyu Zhang, Quan Zhou, and Tieyi Yan
Appl. Opt. 53(30) 7045-7049 (2014)

Simultaneous strain and temperature measurement with long-period gratings

Vikram Bhatia, David Campbell, Richard O. Claus, and Ashish M. Vengsarkar
Opt. Lett. 22(9) 648-650 (1997)

Discrimination of bending and temperature sensitivities with phase-shifted long-period fiber gratings depending on initial coupling strength

Young-Geun Han, Ju Han Lee, and Sang Bae Lee
Opt. Express 12(14) 3204-3208 (2004)

View More...

Cited By

Optica participates in Crossref's Cited-By Linking service. Citing articles from Optica Publishing Group journals and other participating publishers are listed here.

Alert me when this article is cited.


Figures (5)
Fig. 1.
Fig. 1. Schematic of the simultaneous measurement of strain and temperature based on two LPFGs with similar strain sensitivities.

Download Full Size | PDF

Fig. 2.
Fig. 2. Evolution of the transmission characteristics of two LPFGs during the grating formation. The dashed and gray lines show the final transmission characteristics of LPFG1 alone and overlapped gratings, respectively. Circles show the transmission characteristics of LPFG2 with UV exposure during the grating formation.

Download Full Size | PDF

Fig. 3.
Fig. 3. Measurement results of the peak separation of LPFGs with the temperature change. The sensitivity estimated from the linear fit of the peak separation was 0.69 nm/°C. The transmission characteristics of LPFGs with the temperature change were shown in the inset

Download Full Size | PDF

Fig. 4.
Fig. 4. Measurement results of the peak shift of LPFGs with the strain change. The sensitivity estimated from the linear fit of the peak shift was 0.46 nm/µstrain. The transmission characteristics of LPFGs with the strain change were shown in the inset.

Download Full Size | PDF

Fig. 5.
Fig. 5. Results of simultaneous measurement of strain and temperature. The rms error of the measured strain and temperature were 8.3 µstrain and 0.7°C, respectively.

Download Full Size | PDF

Tables (1)

Tables Icon

Table 1. Measurement results of the temperature and strain sensitivities of LPFG1 and LPFG2 with the cladding mode order m.

View Table
Select as filters
Select Topics Cancel
Top
       
© Copyright 2024 | Optica Publishing Group. All rights reserved, including rights for text and data mining and training of artificial technologies or similar technologies.
Privacy | Terms of Use