Fabrication of Phase-Shifted Long-Period Fiber Grating and Its Application to Strain Measurement

Author

Peng Wang ; Lunlun Xian ; Hongpu Li

Author_Institution

Grad. Sch. of Sci. & Technol., Shizuoka Univ., Hamamatsu, Japan

Volume

27

Issue

5

fYear

2015

fDate

March1, 1 2015

Firstpage

557

Lastpage

560

Abstract

Several kinds of phase-shifted long-period gratings (LPGs) have been fabricated using a high-repetitionrate CO₂ laser, where both the grating and the inserted phase shift are simultaneously produced in a commonly used single-mode fiber. Furthermore, using one of the fabricated phase-shifted LPGs, a temperature-insensitive sensor that allows for large axial strain measurement with a value up to 7600 με, is proposed and first demonstrated. Measurement accuracy for the strain ranging from 340 to 7600 με is estimated to be ±30 με, while the temperature is changed in a range of 20°C-140°C.

Keywords

diffraction gratings; fibre optic sensors; laser materials processing; optical fibre fabrication; optical fibre testing; optical phase shifters; strain measurement; strain sensors; temperature sensors; high-repetition-rate carbon dioxide laser; large axial strain measurement; phase-shifted long-period fiber grating fabrication; single-mode fiber; temperature 20 degC to 140 degC; temperature-insensitive sensor; Fiber gratings; Optical fiber polarization; Optical fiber sensors; Strain; Strain measurement; Temperature measurement; Long-period fiber grating; phase-shifted grating; strain sensor;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2014.2385067

Filename

6994817