Earticle

초록

영어

In order to improve the detection accuracy of wavelength, the filtering and curve fitting technologies were applied in the FBG wavelength demodulation system based on tunable F-P filter. These methods could realize the accurate peak-location of output signals of the photo detector. According to the characteristics of noise, the FIR low-pass filter was designed to filter the obtained light power signals so as to provide the input signals with high SNR for the peak-detection algorithms. By analyzing and comparing several typical peak-searching algorithms, the algorithm of Gauss formula nonlinear curve fitting (L-M) was chosen to fit the digitized light power signals. The experimental results show that L-M fitting algorithm reduces the mean square error by 7.5% compared with the Gauss fitting algorithm. For the Gauss signal in the wavelength demodulation system designed in the paper, the L-M algorithm has lower mean square error than other peak-searching algorithms. This algorithm is suitable for FBG wavelength demodulation system based on tunable F-P filter. It can efficiently raise the accuracy of wavelength demodulation system.

목차

Abstract
 1. Introduction
 2. Tunable F-P Filter Demodulation System
 3. Design of Filter Algorithm
 4. Peak-searching Algorithm
  4.1. Direct Peak-detection Algorithm
  4.2. Gauss Curve Fitting Algorithm
  4.3. Gauss Formula Nonlinear Curve Fitting Algorithm
 5. Implementation of Filtering and Peak-searching Algorithm on FPGA
 6. Experimental Result and Analysis
 7. Conclusion
 Acknowledgements
 References

키워드

저자

• Peng Wang [ College of Electrical and Electronic Engineering, Harbin University of Science and Technology, Harbin, 150080, China, Key Laboratory of Engineering Dielectrics and Its Application, Ministry of Education of China, Harbin, 150080, China ]
• Xu Han [ College of Electrical and Electronic Engineering, Harbin University of Science and Technology, Harbin, 150080, China ]
• Simin Guan [ College of Electrical and Electronic Engineering, Harbin University of Science and Technology, Harbin, 150080, China ]
• Hong Zhao [ Key Laboratory of Engineering Dielectrics and Its Application, Ministry of Education of China, Harbin, 150080, China ]
• Minglei Shao [ College of Electrical and Electronic Engineering, Harbin University of Science and Technology, Harbin, 150080, China ]

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  International Journal of Hybrid Information Technology

• 간기

  격월간

• pISSN

  1738-9968

• 수록기간

  2008~2016

• 십진분류

  KDC 505 DDC 605