A high-speed and high-precision phase-shift demodulation algorithm for optical fiber sensing system based on low-coherence interference

2012 ◽  
Author(s):  
Shaohua Wang ◽  
Junfeng Jiang ◽  
Tiegen Liu ◽  
Kun Liu ◽  
Jinde Yin ◽  
...  
Keyword(s):  
Phase Shift ◽  
Optical Fiber ◽  
High Precision ◽  
High Speed ◽  
Low Coherence ◽  
Fiber Sensing ◽  
Sensing System ◽  
Precision Phase ◽  
Optical Fiber Sensing

Bird strike event monitoring in a composite UAV wing using high speed optical fiber sensing system

2012 ◽  
Vol 72 (4) ◽  
pp. 498-505 ◽  
Author(s):  
Chan Yik Park ◽  
Byeong-Wook Jang ◽  
Jong Heon Kim ◽  
Chun-Gon Kim ◽  
Seung-Moon Jun
Keyword(s):  
Optical Fiber ◽  
High Speed ◽  
Bird Strike ◽  
Event Monitoring ◽  
Fiber Sensing ◽  
Sensing System ◽  
Optical Fiber Sensing

Ultralow-Repetition-Rate High-Energy Square Wave Pulse Amplification System for the Brillouin Optical Fiber Sensing System

2013 ◽  
Vol 397-400 ◽  
pp. 1913-1917
Author(s):  
Hang Tian ◽  
Cheng Qun Yin ◽  
An Qiang Lv ◽  
Yong Qian Li
Keyword(s):  
Optical Fiber ◽  
High Speed ◽  
Frequency Component ◽  
High Energy ◽  
Duty Ratio ◽  
Square Wave ◽  
Fiber Sensing ◽  
Sensing System ◽  
Amplification System ◽  
Optical Fiber Sensing

This paper is aimed at designing a special pulse power amplification system for an ultrahigh-speed pulser that is used in Brillouin optical fiber sensing system. This amplification system consists of three parts, that is, signal receiving part, power amplifying part and 180 degree phase shifting part. Considering the fact that signals produced by the pulser are 1.2V differential PCML square wave signals and have ultrafast rising and falling transition time, high speed op-amps were adopted to receive signals and isolate pulser and amplifier. Since square wave signals have ultralow duty ratio, the power amplifier was designed with only one transistor working in switch-mode. As the effective frequency component of the pulse is up to 1500MHz, this design made use of a high speed high voltage operational amplifier to shift phase for signals. The eventually result indicates that, this amplification system can amplify square wave signals whose pulse width ranges from 2ns to 5ns, and voltage amplitude 1V of square wave signals with maximum duty ratio 5:105and minimum duty ratio 1:106up to 8V.

Distributed Raman Optical Fiber Sensing System Based on FPGA

2021 ◽  
Vol 58 (5) ◽  
pp. 0506006-506006142
Author(s):  
刘恒 Liu Heng ◽  
喻俊松 Yu Junsong ◽  
万生鹏 Wan Shengpeng ◽  
董德壮 Dong Dezhuang ◽  
熊新中 Xiong Xinzhong ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Fiber Sensing ◽  
Sensing System ◽  
Optical Fiber Sensing

scholarly journals Plastic Optical Fiber Sensing of Alcohol Concentration in Liquors

2012 ◽  
Vol 2012 ◽  
pp. 1-5 ◽  
Author(s):  
Masayuki Morisawa ◽  
Shinzo Muto
Keyword(s):  
Optical Fiber ◽  
Fast Response ◽  
Alcohol Concentration ◽  
Novolac Resin ◽  
Sensor Head ◽  
Cladding Layer ◽  
Fiber Sensing ◽  
Sensing System ◽  
Green Led ◽  
Optical Fiber Sensing

A simple optical fiber sensing system of alcohol concentration in liquors has been studied. In this sensor head, a mixture polymer of novolac resin and polyvinylidenefluoride (PVDF) with a ratio of 9 : 1 was coated as a sensitive cladding layer on the plastic fiber core made of polystyrene-(PS-)coated polycarbonate (PC). Using this sensor head and a green LED light source, it was confirmed that alcohol concentration in several kinds of liquors from beer to whisky can easily be measured with a fast response time less than 1 minute.

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