Dissertation > Excellent graduate degree dissertation topics show

Study on Spectral Characteristic of Fiber Bragg Grating

Author: LiuHaiTao
Tutor: PanZuo
School: Southwest Jiaotong University
Course: Communication and Information System
Keywords: Optical fiber Bragg grating Sampled fiber Bragg grating (SFBG) Spectral characteristic Multiple phase shift (MPS) Optical filter
CLC: TN253
Type: Master's thesis
Year: 2009
Downloads: 232
Quote: 0
Read: Download Dissertation


Optical fiber Bragg grating is one of the most important equipments in fiber communication and sensing system, and is a very advanced project all around the world too. It can be used extensively in almost all the links of optic communication because it has many advantages such as low insertion loss, polarization insensitive, easy connection with fiber, controllable and dynamic, contact construction, easy to integrate etc. With the development of optic communication, not only the requirements for the resonant wavelength of the reflection spectrum, peak value and bandwidth will be stricter, but there is still a great deal of work to do about the spectrum analysis and improvement.Firstly, the development, classification and application of FBG have beensimply illustrated. Secondly, the Coupled-Mode Theory which is fit for the Bragg grating was derived from the wave equation and a simple but effective numerical method known as Transfer Matrix Method is also presented. And then, a very useful theory-Multiple Phase Shifts (MPS) theory is discoursed in detail. The reflection characteristic of rectangle sampled, Sinc sampled, Gauss apodized gratings with MPS have been calculated by using the Transfer Matrix Method, the analyzing and discussion were given in the end. Finally, a method for designing a broad spectrum multi-channel optical filter base on FBG is proposed. It was designed according to the practical demand in DWDM and with many different requirements, and the numerical simulation was shown in the end.The results of MPS theory in Sinc sampled grating and Gauss apodized sampled grating indicate that in Sine sampled gratings, the side-lobes and crossfire must be influenced by the index change. After using the MPS, the crossfire will be more severe. In Gauss apodized gratings, the extinction ratio and the ratio of bandwidth to channel spacing all will be changed with the parameter of G. After using the MPS, the change will be cuter.The designing of a broad spectrum multi-channel optical filter shows that the wave band of the reflection spectrum is widened and the channel number is multiplied. What’s more, the spectrum flatness is improved with the increasing of refraction index change. Moreover, for the sake of improving the extinction ratio and peak value when MPS adopted in concatenated SFBG, an available designing method based on the cascaded unit is put forward and the optimized results are obtained.

Related Dissertations

  1. Research of Fiber Sensor Measure Method Based on DSP,TP212.14
  2. Study on Spectral Properties and Structure Design of Fiber Bragg Grating Flow Meters,TN253
  3. Design of FBG Sensor and System Research on Mine Monitoring of Safe Production,TP212.9
  4. Study on Fiber Grating Demodulation System Based on Tuned DFB Laser,TN253
  5. Tunable optical grating comb filter characteristics,O436
  6. Magneto - optical fiber grating polarization characteristics of,O436.3
  7. Optical fiber grating interferometer based on the structure of,TN253
  8. Study on Sensing Signal Demodulation System for Fiber Bragg Grating Based on LabVIEW,TP212.14
  9. Magneto-optical fiber Bragg grating - based all-optical clock regeneration,TN253
  10. Temperature-Insensitive Biochemical Sensor and All-Optical Switching Based on Fiber Gratings,TP212.2
  11. Based on the gaussian filter FBG vibration sensor demodulation technology research,TN253
  12. The Study on the Fiber Bragg Grating Demodulation Technique Based on the Edge Filter,TN256
  13. Theoretical Research on Gas Sensing by Bragg Fiber,TP212
  14. Research on the Technique of the Optical Fiber Bragg Grating Sensors,TN25
  15. The Basic Research on Chemical Sensing of Fiber Bragg Gratings,TN253
  16. Application Research on Fiber Bragg Grating in Dynamic Strain Measurement,TN253
  17. Study of Sensing Signal Demodulation Technique Based on FBG,TP202
  18. Temperature Compensation Method of Optical Fiber Bragg Grating Sensing Test to Simulation Experiments,TN253
  19. Study on Optical Fiber Bragg Grating Muti-Parameter Sensing Theory and Technology and Its Application in Monitoring Underground Engineering Disasters,P694
  20. Research on All-optical Signal Processing Based on Nonlinear Effect of Fiber,TN911.74
  21. Studies on the Characters of Large Chirped Fiber Grating,TN253

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