A multichannel fiber optic sensor using Bragg gratings and Brillouin optical time domain analysis for temperature and strain measurements

1999 ◽  
Author(s):  
Ralph Posey
Keyword(s):  
Time Domain ◽  
Fiber Optic ◽  
Time Domain Analysis ◽  
Bragg Gratings ◽  
Domain Analysis ◽  
Fiber Optic Sensor ◽  
Strain Measurements ◽  
Optic Sensor ◽  
Optical Time

scholarly journals Brillouin Optical Time Domain Analysis of Fiber Optic Parametric Amplifiers

2006 ◽  
Author(s):  
A. Vedadi ◽  
D. Alasia ◽  
E. Lantz ◽  
H. Maillotte ◽  
L. Thevenaz ◽  
...  
Keyword(s):  
Time Domain ◽  
Fiber Optic ◽  
Time Domain Analysis ◽  
Domain Analysis ◽  
Parametric Amplifiers ◽  
Optical Time

A Brillouin Optical Time Domain Analysis Based Distributed Fiber Optic Intrusion Sensor System

2010 ◽  
Vol 37 (4) ◽  
pp. 1037-1041 ◽  
Author(s):  
洪小斌 Hong Xiaobin ◽  
郭宏翔 Guo Hongxiang ◽  
伍剑 Wu Jian
Keyword(s):  
Time Domain ◽  
Fiber Optic ◽  
Time Domain Analysis ◽  
Domain Analysis ◽  
Sensor System ◽  
Optical Time

scholarly journals Brillouin Optical Time-Domain Analysis of Fiber-Optic Parametric Amplifiers

2007 ◽  
Vol 19 (3) ◽  
pp. 179-181 ◽  
Author(s):  
A. Vedadi ◽  
D. Alasia ◽  
E. Lantz ◽  
H. Maillotte ◽  
L. Thevenaz ◽  
...  
Keyword(s):  
Time Domain ◽  
Fiber Optic ◽  
Time Domain Analysis ◽  
Domain Analysis ◽  
Parametric Amplifiers ◽  
Optical Time

LabVIEW Applications for Fiber-Optic Remote Test and Fiber Sensor Systems

2014 ◽  
Vol 610 ◽  
pp. 216-220
Author(s):  
Liang Yu Su
Keyword(s):  
Time Domain ◽  
Fiber Optic ◽  
Fiber Optic Sensor ◽  
Fiber Sensor ◽  
Optic System ◽  
Optical Time Domain Reflectometer ◽  
Optic Sensor ◽  
Optical Time ◽  
Fiber Optic System ◽  
Time Domain Reflectometer

This paper demonstrates applications of LabVIEW in automatic test measurement of fiber optic system.First,the LabVIEW applications in fiber optic system and the basics of instrument connectivity are presented.Then,the aspects of hardware communication to external instruments through GPIB and serial interfaces are analyzed.Next,self-calibrating automated characterization system for depressed cladding applications is demonstrated utilizing the LabVIEW’s GPIB interface. Results of the manual and automatic measurements and the analysis of the measurement trace obtained from the optical time domain reflectometer (OTDR) are shown.In the end,two applications of LabVIEW in fiber optic sensor system are discussed.

Heterodyne slope-assisted Brillouin optical time-domain analysis for dynamic strain measurements

2016 ◽  
Vol 18 (2) ◽  
pp. 025606 ◽  
Author(s):  
Aldo Minardo ◽  
Agnese Coscetta ◽  
Romeo Bernini ◽  
Luigi Zeni
Keyword(s):  
Time Domain ◽  
Time Domain Analysis ◽  
Domain Analysis ◽  
Dynamic Strain ◽  
Strain Measurements ◽  
Optical Time

scholarly journals Hybrid Fiber-Optic Sensing Integrating Brillouin Optical Time-Domain Analysis and Fiber Bragg Grating for Long-Range Two-Parameter Measurement

Sensors ◽  
2021 ◽  
Vol 21 (12) ◽  
pp. 4224
Author(s):  
Shien-Kuei Liaw ◽  
Chi-Wen Liao ◽  
Meng-Hsuan Tsai ◽  
Dong-Chang Li ◽  
Shu-Ming Yang ◽  
...  
Keyword(s):  
Time Domain ◽  
Fiber Optic ◽  
Single Mode ◽  
Time Domain Analysis ◽  
Domain Analysis ◽  
Sensing Element ◽  
Hybrid Fiber ◽  
Fiber System ◽  
Fiber Sensing ◽  
Optical Time

Distributed fiber sensing (DFS) can provide real-time signals and warnings. The entire length of fiber optic cable can act as a sensing element, but the accuracy is sometimes limited. On the other hand, point-to-point fiber sensing (PPFS) is usually implemented using one or more fiber Bragg gratings (FBGs) at specific positions along with the fiber for the monitoring of specific parameters (temperature, strain, pressure, and so on). However, the cost becomes expensive when the number of FBGs increases. A hybrid fiber sensing scheme is thus proposed, combining the advantages of DFS and PPFS. It is based on a Brillouin optical time-domain analysis (BOTDA) fiber system with additional FBGs embedded at certain positions where it is necessary to detect specific parameters. The hybrid fiber sensing system has the advantages of full sensing coverage at essential locations that need to be carefully monitored. In our work, the test results showed that the proposed system could achieve a sensing distance of 16 km with the single-mode fiber with a 2 m spatial resolution. For FBG parameter measurements, the temperature variation was 52 °C, from 25 °C to 77 °C, with a temperature sensitivity of 23 pm/°C, and the strain was from 0 to 400 µε, with a strain sensitivity of 0.975 pm/µε, respectively, using two FBGs.

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