Enlargement of measurement range of optical-fiber Brillouin distributed strain sensor using correlation-based continuous-wave technique

2001 ◽  
Author(s):  
K. Hotate ◽  
M. Tanaka
Keyword(s):  
Optical Fiber ◽  
Continuous Wave ◽  
Strain Sensor ◽  
Measurement Range ◽  
Wave Technique ◽  
Distributed Strain

Multiplexing of optical fiber gas sensors with a frequency-modulated continuous-wave technique

2001 ◽  
Vol 40 (7) ◽  
pp. 1011 ◽  
Author(s):  
H. B. Yu ◽  
W. Jin ◽  
H. L. Ho ◽  
K. C. Chan ◽  
C. C. Chan ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Gas Sensors ◽  
Continuous Wave ◽  
Wave Technique

scholarly journals High-precision optical fiber pressure sensor using frequency-modulated continuous-wave laser interference

AIP Advances ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 025038
Author(s):  
Lang Bai ◽  
Gang Zheng ◽  
Bin Sun ◽  
Xiongxing Zhang ◽  
Qiming Sheng ◽  
...  
Keyword(s):  
Optical Fiber ◽  
High Precision ◽  
Pressure Sensor ◽  
Continuous Wave ◽  
Continuous Wave Laser ◽  
Laser Interference ◽  
Wave Laser

scholarly journals In-Process Diameter Measurement Technique for Micro-Optical Fiber with Standing Wave Illumination

2021 ◽  
Author(s):  
Masaki Michihata ◽  
Zhao Zheng ◽  
Daiki Funaiwa ◽  
Sojiro Murakami ◽  
Shotaro Kadoya ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Standing Wave ◽  
Dynamic Range ◽  
Scattered Light ◽  
High Dynamic Range ◽  
Measurement Range ◽  
Diameter Distribution ◽  
Process Measurement ◽  
Air Turbulence ◽  
Tapered Optical Fiber

AbstractIn this paper, we propose an in-process measurement method of the diameter of micro-optical fiber such as a tapered optical fiber. The proposed technique is based on analyzing optically scattered light generated by standing wave illumination. The proposed method is significant in that it requires an only limited measurement range and does not require a high dynamic range sensor. These properties are suitable for in-process measurement. This experiment verified that the proposed method could measure a fiber diameter as stable as ± 0.01 μm under an air turbulence environment. As a result of comparing the measured diameter distribution with those by scanning electron microscopy, it was confirmed that the proposed method has a measurement accuracy better than several hundred nanometers.

Continuous-wave short-cavity laser based on the Er- Yb-codoped phosphorosilicate optical fiber

2020 ◽  
Author(s):  
D. S. Lipatov ◽  
A. N. Guryanov ◽  
A. S. Lobanov ◽  
A. N. Abramov ◽  
A. A. Umnikov ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Continuous Wave ◽  
Cavity Laser

scholarly journals Wind Turbine Blade Monitoring with Brillouin-Based Fiber-Optic Sensors

2017 ◽  
Vol 2017 ◽  
pp. 1-5 ◽  
Author(s):  
Agnese Coscetta ◽  
Aldo Minardo ◽  
Lucio Olivares ◽  
Maurizio Mirabile ◽  
Mario Longo ◽  
...  
Keyword(s):  
Wind Turbine ◽  
Turbine Blade ◽  
Fiber Optic ◽  
Strain Sensor ◽  
Experimental Tests ◽  
Fiber Optic Sensors ◽  
Composite Blade ◽  
Operation Stability ◽  
Distributed Strain ◽  
Strain Detection

Wind turbine (WT) blade is one of the most important components in WTs, as it is the key component for receiving wind energy and has direct influence on WT operation stability. As the size of modern turbine blade increases, condition monitoring and maintenance of blades become more important. Strain detection is one of the most effective methods to monitor blade conditions. In this paper, a distributed fiber-optic strain sensor is used for blade monitoring. Preliminary experimental tests have been carried out over a 14 m long WT composite blade, demonstrating the possibility of performing distributed strain and vibration measurements.

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