Dissertation > Excellent graduate degree dissertation topics show

LD-pumped Yb-doped double-clad fiber laser

Author: LiangLanJu
Tutor: ZhengYi
School: Qufu Normal University
Course: Physical Electronics
Keywords: Yb3 -doped double-clad fiber LD pumped F-P cavity Asymmetric double-end -pumped
CLC: TN248
Type: Master's thesis
Year: 2005
Downloads: 149
Quote: 2
Read: Download Dissertation

Abstract


Since the 20th century, since the late 1980s, due cladding-pumped technology major breakthrough in fiber laser research has made unprecedented progress, and with excellent performance and broad application prospects become a hot topic in the international photonics industry. In this paper, both theoretical and experimental aspects of doped Yb 3 double-clad fiber laser in-depth study. Include the following: 1. Detailed overview of the domestic and international double-clad fiber laser research progress and the main application, that the double-clad fiber laser research significance. 2 From the Yb 3 level structure and properties, combined with Yb 3 ion absorption and emission spectra of doped Yb 3 Fiber laser pump source selection were analyzed. Then he analyzed the doped Yb 3 double-clad fiber laser geometry and the shape of the inner cladding double-clad fiber absorption efficiency. 3 Taking into account the double-clad fiber laser special structure of the distribution of spontaneous emission and fiber loss and other factors to establish the rate equation model, the use of Runge - Kutta method (Rounge-Kutta) calculated output power, gain and optical characteristics the length of the relationship, according to the rate equation derived double-clad fiber laser pumping threshold, slope efficiency of expression. By numerical calculation, obtained at a certain pump power there is an optimal fiber length calculations also show that the smaller the output mirror reflectivity greater output power fiber lasers, fiber end can be used as an output mirror. The distribution of spontaneous emission and optical loss of the fiber lasers have a certain impact. Especially for high-power double-clad fiber laser, we must consider the spontaneous radiation power, fiber distribution losses and other factors. For double-clad fiber laser pump source configuration was theoretically optimized. Analysis of different pump mode pump light, the laser output power and gain characteristics in optical fiber distribution, comprehensive analysis of asymmetrical double-end-pumped more suitable for high-power fiber lasers. 4 typical FP cavity doped Yb 3 double-clad fiber laser experimental setup for plum-shaped doped Yb 3 fiber laser output characteristics for a detailed experimental study. 976nm pigtailed laser diode in the output power of 18.29W pumped to obtain laser output power greater than 8.48W. Laser slope efficiency reached 54.42%, optical conversion efficiency of 46.36%.

Related Dissertations

  1. Analyiss on Dicharge Environment and the Effect of of Dust Electrostatic Coagualation,X701.2
  2. Solar Pressurized Cavity Thermal Receiver Numerical Simulation Research,TK513
  3. Theoretical Study on Structures and Thermodynamic Properties of Gd（H2O）n3+（n =8,9）,O614.339
  4. Multi-velocity Lattice Gas Simulation on Characteristic of Thermoacoustic Engines,TK40
  5. The Simulation Study of Diesel Spray Based on CFD,TK421
  6. LD-Pumped 355nm Ultraviolet Laser of Continuous,TN248
  7. Research on Multi-Wavelength Solid-State Laser,TN248
  8. 885nm Directly Pumped Nd: YAG Laser,TN248
  9. The Research on the Processing of N Surface Emitting 980nm VCSEL,TN248
  10. Piezoelectric Wind-energy-harvesting Device with Reed and Resonant Cavity,TK8
  11. Theoretical Study of the Output Characteristics of LD Pumped Tm3+, Ho3+ Doped Fiber Laser,TN248
  12. Research on the Intensity Property of the Surface Plasmon Waves Splitting,O436.1
  13. Raman Laser System for Atom Coherent Manipulation,TN241
  14. Research and Implementation of Observation System of Industry Measuring Appliance Based on SMS of GSM,TP274
  15. Research on Fiber Optical Fabry-Perot Cavity Temperature Sensing Technology,TP212.1
  16. Ginger moxibustion moxa treatment of primary dysmenorrhea Hanning Blood Clinical Observation,R246.3
  17. Meso-analysis and Application of Yield Function of Pressure-sensitive Materials,O344.1
  18. Wide Bandwidth beam antenna design,TN822.8
  19. How To Understand Non-material Culture Protection Through Haha Singing and District Opera,G122
  20. Fabrication of Zinc Oxide Microcavities Array and Its Applications,O614.241
  21. Research on the Boundary Element Method in Eie Forward Problem,R318.0

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