Journal ArticleDOI
Hybrid fiber Bragg grating/long period fiber grating sensor for strain/temperature discrimination
Reads0
Chats0
TLDR
In this paper, the difference in strain and temperature response of fiber Bragg gratings and a long period fiber grating was used to discriminate between strain induced and temperature induced wavelength shifts.Abstract:
We demonstrate a novel sensor which uses the difference in strain and temperature response of fiber Bragg gratings and a long period fiber grating to discriminate between strain and temperature induced wavelength shifts. Sensor interrogation is performed entirely on the fiber Bragg grating reflection signals. Strain and temperature were simultaneously measured to /spl plusmn/9 /spl mu/strain and /spl plusmn/1.5/spl deg/C over a wide range of conditions.read more
Citations
More filters
Proceedings ArticleDOI
Temperature-independent fiber Bragg grating micro-displacement sensor
TL;DR: In this article, a temperature-independent micro-displacement measurement using a single fiber Bragg grating based on broadened reflection spectrum is proposed and experimentally demonstrated using a specially designed bending cantilever beam (BCB) structure.
Journal ArticleDOI
Rigorous theoretical analysis of reflection and transmission spectra characteristics in cascaded long-period and fiber Bragg gratings
TL;DR: In this article, the authors rigorously deduce the coupledmode equations of a long-period fiber grating and fiber Bragg grating in their cascaded structure (CLBG), based on coupledmode theory.
Journal ArticleDOI
In-Line Mach Zehnder Interferometer Based on Ytterbium Doped Fiber with Up-Taper Structure in Fiber Ring Laser and Its Application in Sensing
TL;DR: In this paper , an up-taper fiber structure in a fiber ring laser (FRL) cavity was designed to simultaneously act as a filter, sensor and gain medium, achieving a temperature sensitivity of 0.261 nm/°C in the range of 10−50 °C.
Journal ArticleDOI
Research on temperature sensing characteristics of fiber side-open cavity structure
Zi-ting Lin,Ri-qing Lv,Yong Zhao,Hong-kun Zheng,Yi-fan Zhou,Ya-nan Zhang,Xuegang Li,Qiang Zhao +7 more
TL;DR: In this paper , a sensing probe based on fiber side-open cavity structure is proposed for the measurement of seawater temperature, which is mainly composed of a lead-in single mode fiber (SMF), a SOCTF, a multimode fiber (MMF), lead-out SMF, and a layer of polydimethylsiloxane (PDMS).
Patent
Surrounding refractive index measurement method based on thin cladding long period fiber bragg grating polarization property
Bai Yukun,Zhang Yue +1 more
TL;DR: In this paper, the authors proposed a measurement method based on the thin cladding long period fiber bragg grating polarization property, where the radius of a cladding is 20.75 micrometers, detection light waves are any complete polarized light ranging from 1690 nm to 1710 nm, and measurement scope of the surrounding refractive index ranges from 1 to 1.46.
References
More filters
Journal ArticleDOI
Formation of Bragg gratings in optical fibers by a transverse holographic method
G. Meltz,W W Morey,W. H. Glenn +2 more
TL;DR: Bragg gratings have been produced in germanosilicate optical fibers by exposing the core, through the side of the cladding, to a coherent UV two-beam interference pattern with a wavelength selected to lie in the oxygen-vacancy defect band of germania, near 244 nm.
Long-period fiber grating as band-rejection filters
TL;DR: In this paper, a new class of long-period fiber gratings that can be used as in-fiber, low-loss, band-rejection filters is presented.
Journal ArticleDOI
Long-period fiber gratings as band-rejection filters
Ashish Madhukar Vengsarkar,Paul Joseph Lemaire,J. B. Judkins,Vikram Bhatia,Turan Erdogan,John E. Sipe +5 more
TL;DR: In this paper, a new class of long-period fiber gratings that can be used as in-fiber, low-loss, band-rejection filters is presented.
Journal ArticleDOI
Multiplexed fiber Bragg grating strain-sensor system with a fiber Fabry–Perot wavelength filter
TL;DR: The use of a fiber Fabry–Perot filter for detecting the wavelength shift of a Fiber Bragg grating sensor or network of sensor elements along a common fiber path is described.
Journal ArticleDOI
Discrimination between strain and temperature effects using dual-wavelength fibre grating sensors
TL;DR: In this paper, the spectral properties of two superimposed fiber gratings having different Bragg wavelengths (850 and 1300 nm) with respect to strain and temperature were studied, and it was shown that the ratio of sensitivity at two Bragg wavelength is dependent on strain, which can be used for simultaneous measurement of these parameters.