Results 261 to 270 of about 42,397 (299)

Fiber Bragg grating strain sensor demodulator using a chirped fiber grating

IEEE Photonics Technology Letters, 2001
A fiber Bragg grating (FBG) sensor demodulator using a chirped fiber grating is proposed. The demodulator uses UV-induced birefringence of chirped fiber grating to interrogate the wavelength shift of a sensor FBG. The demodulator is composed of a polarizing beam splitter, a polarization controller, a single-mode fiber, and a chirped fiber grating.
null Sungchul Kim, null Seungwoo Kim, null Jaejoon Kwon, null Byoungho Lee   +3 more
openaire   +1 more source

Fabrication of tunable nonlinearly chirped fiber gratings using fiber Bragg grating

Optics Communications, 2001
Abstract A simple method for fabricating tunable nonlinearly chirped fiber gratings is demonstrated experimentally. A nonlinearly chirped fiber grating is formed when tension is applied to an etched fiber Bragg grating, whose cross-sectional area’s reciprocal varies nonlinearly along the length of grating.
Zhanxiong Wei, Huiping Li, Wei Zheng, Yushu Zhang   +3 more
openaire   +1 more source

Intensity-independent fiber coupled interrogation technique for fiber Bragg gratings by fiber Bragg gratings

SPIE Proceedings, 2012
A low cost, highly accurate and light intensity-independent sensor system for the analysis of fiber Bragg grating signals based on fiber Bragg gratings in the detection unit is presented. The setup is based on two fiber Bragg gratings used in reflection to analyse one sensing fiber Bragg grating.
Jörg Burgmeier, Jan Koch, Wolfgang Schade   +2 more
openaire   +1 more source

Surface-core fiber gratings

SPIE Proceedings, 2015
In this paper, we report, to our knowledge, the first demonstration of the induction of long-period and Bragg gratings on surface-core optical fibers. Surface-core fibers described herein were fabricated from commercial silica tubes and germanium-doped silica rods by employing a very simple procedure.
Jonas H. Osório, Ricardo Oliveira, L. Mosquera, Marcos A. R. Franco, Jamshid Heidarialamdarloo, Lúcia Bilro, Rogério N. Nogueira, Cristiano M. B. Cordeiro   +7 more
openaire   +1 more source

Unidirectional coupled chiral fiber grating

Optics Letters
We investigate a unidirectional coupled chiral fiber grating (UCFG) with both helical refractive index (RI) and loss modulation. The two modulations form a π/2 phase difference in the fiber cross-sectional azimuth angle, which “breaks” the mode coupled reciprocity of the forward and backward propagation.
Donghui Wang, Chao Ma, Hongye Wang, Chengcheng Feng, Xiaotong Zhang, Houquan Liu, Libo Yuan   +6 more
openaire   +2 more sources

Fiber sensors based on fiber gratings

2013 6th IEEE/International Conference on Advanced Infocomm Technology (ICAIT), 2013
In this paper, we present two different types of pressure sensors including a high-sensitivity lateral pressure sensor and a temperature-independent differential pressure sensor by using fiber Bragg gratings to be encapsulated in a polymer-half-filled metal cylinder.
openaire   +1 more source

Functional Fiber Materials to Smart Fiber Devices

Chemical Reviews, 2023

exaly  

FIBER GRATINGS

2005
P.S. Westbrook, B.J. Eggleton
openaire   +1 more source

Fiber Bragg Gratings

2005
K. Körber, C. Kulik
openaire   +1 more source

Fecal microbial transplantation and fiber supplementation in patients with severe obesity and metabolic syndrome: a randomized double-blind, placebo-controlled phase 2 trial

Nature Medicine, 2021
Valentin Mocanu, Zhengxiao Zhang, Edward C Deehan   +2 more
exaly