A Field Trial of Fiber Optic Subscriber Loop Systems Utilizing Wavelength-Division Multiplexers

1982 ◽  
Vol 30 (9) ◽  
pp. 2172-2184 ◽  
Author(s):  
K. Asatani ◽  
R. Watanabe ◽  
K. Nosu ◽  
T. Matsumoto ◽  
F. Nihei
Keyword(s):  
Field Trial ◽  
Fiber Optic ◽  
Wavelength Division

Field trial experiment of CDMA fiber-optic microcellular system: FoMiCell

2003 ◽  
Author(s):  
J.M. Cheong ◽  
S.H. Seo ◽  
Y.S. Son ◽  
T.G. Kim ◽  
H. Kim ◽  
...  
Keyword(s):  
Field Trial ◽  
Fiber Optic

Four-channel fiber-optic link employing wavelength division multiplexing and full duplex transmission

1982 ◽  
Author(s):  
A. H. Fitch ◽  
B. E. Kincaid ◽  
K. K. Chow ◽  
C. R. Gifford ◽  
L. Slobodin
Keyword(s):  
Wavelength Division Multiplexing ◽  
Fiber Optic ◽  
Full Duplex ◽  
Wavelength Division

scholarly journals A High-Speed Demodulation Technology of Fiber Optic Extrinsic Fabry-Perot Interferometric Sensor Based on Coarse Spectrum

Sensors ◽  
2021 ◽  
Vol 21 (19) ◽  
pp. 6609
Author(s):  
Peng Zhang ◽  
Ying Wang ◽  
Yuru Chen ◽  
Xiaohua Lei ◽  
Yi Qi ◽  
...  
Keyword(s):  
Real Time ◽  
High Speed ◽  
Cavity Length ◽  
Fiber Optic ◽  
Likelihood Estimation ◽  
Time Dynamic ◽  
Wavelength Division ◽  
Broadband Spectrum ◽  
Fabry Perot ◽  
Interferometric Sensor

A fast real-time demodulation method based on the coarsely sampled spectrum is proposed for transient signals of fiber optic extrinsic Fabry-Perot interferometers (EFPI) sensors. The feasibility of phase demodulation using a coarse spectrum is theoretically analyzed. Based on the coarse spectrum, fast Fourier transform (FFT) algorithm is used to roughly estimate the cavity length. According to the rough estimation, the maximum likelihood estimation (MLE) algorithm is applied to calculate the cavity length accurately. The dense wavelength division multiplexer (DWDM) is used to split the broadband spectrum into the coarse spectrum, and the high-speed synchronous ADC collects the spectrum. The experimental results show that the system can achieve a real-time dynamic demodulation speed of 50 kHz, a static measurement root mean square error (RMSE) of 0.184 nm, and a maximum absolute and relative error distribution of 15 nm and 0.005% of the measurement cavity length compared with optical spectrum analyzers (OSA).

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