Dissertation > Excellent graduate degree dissertation topics show

Study on the Laser Characteristic of Tm3+-doped Double-cladding Fiber

Author: WangZhanXiang
Tutor: DaiNengLi
School: Huazhong University of Science and Technology
Course: Optical Engineering
Keywords: Thulium-doped fiber Laser performance Slope efficiency Laser threshold Bend diameter
CLC: TN248
Type: Master's thesis
Year: 2011
Downloads: 62
Quote: 0
Read: Download Dissertation

Abstract


The thulium-doped fiber laser whose output wavelength is 2 micron plays an important role in modern military technology(electrooptical countermeasures),biomed icine and lidar.As the core equipment,the preparation technology of thulium-doped double-cladding fiber has been mastered by foreign research team,which has limited the development of the thulium-fiber-using equipment home.This paper aims to research the laser characteristic of thulium-doped fiber prepared by our team,in order to prepare high slope efficiency and high output power fiber,breaking the monopoly of foreign countries.Firstly,we modify the velocity equation and solve it using the runge-kutta solution.,then simulate and analyse the influence of thulium-ion-doped concentration and fiber length to the laser characteristic.Using the Modified Chemical Vapor Deposition and solution or vapour doping technology,we prepared six kinds thulium-doped perform,then draw them to double-cladding fiber.We establish the thulium-doped fiber laser system and test the laser characteristic(slope efficiency,laser wavelength,threshold) of six thulium-doped double-cladding fiber and the influence of bend diameter and different pump wavelength to the laser characteristic,conclusion as follows:1.The minimum slope efficiency is 27.93%,the maximum is 43.23%,threshold changes from 9.2W to 14.25W,output wavelength is between 2013nm and 2043nm;2.Using DCTDF-M004 as gain medium,small bend diameter doesn’t always lead to high slope efficiency;bend diameter has ignore influence on threshold and output wavelength;3.The appropriate pump wavelength for DCTDF-M006 is around 791nm,corresponding to the maximum slope efficiency 43.39%;the output wavelength shifts red with the pump wavelength increases;the change of pump wavelength has ignore influence to the threshold.Analyse the test result and establish foundation for preparing high performance fiber.

Related Dissertations

  1. Research on Thulium-doped Fiber Lasers,TN248
  2. Theoretical Research of an End Pumped Double-clad Fiber Lasers Doped with Quasi Two-energy-level Ions,TN253
  3. Study on Ytterbium-Doped Single-clad/Double-clad Fibers and the Fiber Lasers,TN253
  4. Theoretical and Experimental Studies of Cladding Pumping Er～(3+)/Yb～(3+) Co-doped Fiber Laser and Amplifier,TN248
  5. The Study on New Laser Crystal Nd:GdVO4,TN244
  6. Theoretical Research on Thulium-doped Fiber Lasers,TN248
  7. Experimental Research on Tm3+-doped Fiber Laser,TN248
  8. Erbium ytterbium co-doped phosphate optical waveguide laser characteristics,TN248
  9. Research on Thulium Doped Fiber Laser and Coherent Beam Combination,TN248
  10. The Clinical Effect of Treating Central Serous Retinopathy Choroidal with Subthreshold Near Infrared Laser Radiation Therapy,R774.1
  11. Study on Growth and Performance of Potassium Yttrium Tungstate and Potassium Gadolinium Tungstate Laser Crystals Doped by Rare Earth Ions,TN244
  12. Study on Preparation, Spectroscopy and Lasing Properties of Inorganic-based Hybrid Solid State Dye Laser Medium and the Prototype Instrument,TN248
  13. Study on Stimulated Brillouin Scattering and Its Applications in Optical Fibers,TN248
  14. Solid-state pulsed YAG laser processing equipment and cutting technology research,TG665
  15. The Growth of Heat Capacity Laser Crystal Nd:GGG,O782
  16. Research on Super-broadband Fiber Amplifier,TN722
  17. Yb: GdVO_4 series laser crystal growth of its performance,TN244
  18. Study on the Growth and Propeties of Nd:KGW Multi-Wavelength Laser Crystal,TN244
  19. Nd : LuVO_4 crystal performance and LD end-pumped microchip lasers,TN248
  20. Doped Yb ~ (3) optical ultrashort pulse laser research,TN248
  21. The Study of Solar-Pumped Alexandrite Laser,TN248.1

CLC: > Industrial Technology > Radio electronics, telecommunications technology > Photonics technology,laser technology > Laser technology, the maser > Laser
© 2012 www.DissertationTopic.Net  Mobile