Dissertation > Excellent graduate degree dissertation topics show

Theoretical and Experimental Study of the BOTDA Based Temperature / Strain Sensing Technology

Author: ZhangJingWen
Tutor: LiYongZuo
School: North China Electric Power University
Course: Communication and Information System
Keywords: Brillouin optical time domain analysis . Pulse pre- pump Electro-optic modulator Bias control Polarization control
CLC: TN253
Type: Master's thesis
Year: 2011
Downloads: 97
Quote: 0
Read: Download Dissertation

Abstract


This article describes a fiber Brillouin scattering principle , discussed in detail the basic theory of stimulated Brillouin scattering , Brillouin spectrum characteristics . Fiber by stimulated Brillouin scattering frequency shift by fiber optic temperature and strain mechanism established by using fiber stimulated Brillouin scattering sensing temperature and strain measurement model established between them function expression style . Brillouin frequency shift and optical fiber temperature and strain relations modulation Brillouin optical time domain analysis (BOTDA) system to achieve the theoretical basis of the temperature and strain distributed measurement . Further study based on in-depth analysis of the the light leakage BOTDA system effects , the principle of pulse pre- pumped Brillouin optical time domain analysis techniques ; studied pre - pumped Brillouin optical time domain pulse solutions based on perturbation analysis (PPP-BOTDA) theoretical model of the sensing system , laid the theoretical foundation for the development of future the PPP-BOTDA system . Selected on the basis of in-depth study of principles and operating point drift characteristics of the electro-optical modulator (EOM) , the the appropriate bias control module , the and Design the EOM bias control unit Experiment BOTDA sensing system based on its features and functions . This experiment is used to verify the performance of the bias controller in eliminating EOM transmission curve drift sensing in order to obtain a stable pulse . On the basis of in-depth study on the principle of polarization control and polarization control module features designed EOM input light polarization control experimental system , the preparation of the polarization control procedures ; were controlling the output voltage linearity correction experiment , the experimental results analysis and simulation , and the polarization control module input and output voltage linearity correction ; completion of the half-wave voltage measurements of the polarization control module , using extreme value method to analyze the experimental data , and get channels 1 and 2 of the half- wave voltage ; structures polarization control experiment , the experimental study of polarization control performance of the experimental system , the results show that the basic dynamic control of the polarization state .

Related Dissertations

  1. Research on Modulation Schemes and Automatic Polarization Control Technology in Coherent Optical Communication System,TN929.1
  2. The Research and Controlling of the Modulation Performances of Electro-optic Modulator for the Distributed Brillouin Sensing System,O437.2
  3. Polarization Generator Research Based on PZT Squeezed Fiber Polarization Controller,TN929.11
  4. Coplanar waveguide electro-optic modulator,TN761
  5. Mach- Zehnder interferometer polarization control and Raman optical fiber temperature sensor design,TP212.11
  6. 40Gbps DPSK optical transceiver module studies,TN929.11
  7. Research of Polarization Characteristic in Distributed Optical Fiber White-Light Sensors,O436.3
  8. The Study of Fabricating Photonic Crystal by Holographic Interference Method with a Single Prism and Polymer Electro-optic Modulators,TN761
  9. Research on the Bias Control of Electrohydraulic Vibrator Based on 2D Valve,TH137.5
  10. Organic polymer electro-optic modulators optimize design,TN761
  11. Preparation and Properties of Side Chain PI-based 2nd-Order NLO Materials,O633.22
  12. Research on Linear Electro-optic Effect and Ultraviolet Photoelectric Effect of Cubic Boron Nitride,O613.81
  13. Study on Bidirectional-Switch Power Electronics Converter,TM46
  14. Research of Pulse Green Laser Operating at Variable Repetition Rate,TN248
  15. Study on Microwave Electrode of Polymer Electro-optic Modulator,TN761
  16. Distributed fiber optic sensor demodulation technology,TP212.14
  17. Studies of the Electric-filed-induced and Stress-induce Second-order Nonlinear Optical Effects in Silicon,O437
  18. DSP-Based High Speed Polarization Control System,TP273
  19. Polymer electro-optic modulators microwave electrode system optimization design,TN761
  20. Phase modulation of laser self- mixing interference measurement of micro and nano technologies,TN247

CLC: > Industrial Technology > Radio electronics, telecommunications technology > Photonics technology,laser technology > Optical waveguide and integrated optics > Fiber optic components
© 2012 www.DissertationTopic.Net  Mobile