A polarization-maintaining fiber loop mirror based sensor for liquid refractive index absolute measurement

2012 ◽  
Vol 168 ◽  
pp. 360-364 ◽  
Author(s):  
Chuan Zhong ◽  
Changyu Shen ◽  
Yang You ◽  
Jinlei Chu ◽  
Xin Zou ◽  
...  
Keyword(s):  
Refractive Index ◽  
Absolute Measurement ◽  
Polarization Maintaining Fiber ◽  
Polarization Maintaining ◽  
Fiber Loop Mirror ◽  
Loop Mirror ◽  
Fiber Loop

Liquid Refractive Index Sensor Based on a Polarization-Maintaining Fiber Loop Mirror

2013 ◽  
Vol 13 (5) ◽  
pp. 1721-1724 ◽  
Author(s):  
Jianfeng Wang ◽  
Changyu Shen ◽  
Yanfang Lu ◽  
Debao Chen ◽  
Chuan Zhong ◽  
...  
Keyword(s):  
Refractive Index ◽  
Refractive Index Sensor ◽  
Polarization Maintaining Fiber ◽  
Polarization Maintaining ◽  
Fiber Loop Mirror ◽  
Loop Mirror ◽  
Fiber Loop

scholarly journals Influence of light source on the sensitivity of a Polarization Maintaining Fiber Loop Mirror vibration sensor

2019 ◽  
Vol 39 (2) ◽  
pp. 327-334
Author(s):  
Ying Jiang ◽  
Mingjin Yu ◽  
Mengqi Zhang ◽  
Jiyun Lu
Keyword(s):  
Low Power ◽  
Light Source ◽  
High Power ◽  
Narrow Band ◽  
Vibration Monitoring ◽  
Polarization Maintaining Fiber ◽  
Polarization Maintaining ◽  
Fiber Loop Mirror ◽  
Loop Mirror ◽  
Fiber Loop

Wavelength or light intensity demodulation method for a polarization maintaining fiber loop mirror (PM-FLM) sensor is not only expensive but also unsuitable for vibration monitoring. This paper studies the voltage demodulation principle and explores theoretically the influence of light source on the sensitivity. Then a PM-FLM sensor is applied to vibration monitoring. A low-power narrow-band light source reflected from FBG and a high-power laser light source are used respectively as input. The time domain voltage signals of vibration from a photo-detector are collected by a data acquisition card and converted via a fast Fourier transform algorithm. The experimental result shows that a PM-FLM sensor using a high-power narrow-band light source as input has a higher sensitivity to vibration than the one using a low-power narrow-band light source. In practical application, we can choose a high-power narrow-band light source as input to improve the sensitivity to vibration.

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