Dissertation > Excellent graduate degree dissertation topics show

Study on the Target-In-the-Loop Adaptive Optics Systems

Author: TaoRuMao
Tutor: SiLei
School: National University of Defense Science and Technology
Course: Optical Engineering
Keywords: Adaptive optics Target in the loop High energy fiber laser Beam quality Atmospheric transport
CLC: TN249
Type: Master's thesis
Year: 2011
Downloads: 25
Quote: 0
Read: Download Dissertation

Abstract


One of the effective ways to target-in-the-loop (Target-in-the-loop, referred to as TIL) adaptive optics system with optical feedback, without the advantages of the auxiliary beacon laser, high-energy laser system miniaturization practical in recent years become research focus in the field of high-energy laser technology. Launched a comprehensive system of research paper TIL adaptive optics system, the establishment of a model of the fiber laser array the TIL adaptive optics system, fiber laser array TIL adaptive optics system feasibility, technical approach and achieve, the actual high-energy fiber laser The three key issues of environmental transmission performance. Firstly, traditional adaptive optics technology, TIL adaptive optics technology review. The basic principles and characteristics of traditional adaptive optics and TIL adaptive optics, and the lack of conventional adaptive optics, as well as the advantage of TIL adaptive optics, focusing on analysis of the TIL adaptive optics technology developments and trends, as well as the last few years to obtain a series of landmark achievements. Established a theoretical model of fiber laser array the TIL adaptive optical system based on a coherent light propagation parabolic equations and the target surface wave scattering equation. Verified by theoretical analysis, the TIL adaptive optics used for the atmospheric turbulence fiber laser array adaptive phase locked feasibility. Build a fiber laser array the TIL adaptive phase lock experimental system, carried out a 2-way / 8-way high-power fiber laser array experimental study. First, the successful implementation of the 2-way / 9 10-watt fiber laser array TIL adaptive phase locked, open-loop, long exposure spot contrast to less than 15%, phase-locked, the contrast is higher than 70%, validated TIL adaptive optics compensation and inhibition of high power fiber laser phase noise and turbulence in the laser power and control large ones are currently the highest level of fiber laser array TIL adaptive optics field; Secondly, to carry out a fiber laser array TIL adaptive optics system properties of the closed-loop control, closed-loop control system performance impact on rotating target and strong turbulence, the study results show that: the target characteristic performance impact of TIL closed-loop control, closed-loop control performance dropped significantly when the target rotation, and the strong turbulence disturbance TIL closed loop control performance impact can be ignored. Derivation of a general formula for high-energy laser beam quality degradation after the actual optical system, and quantitative analysis of a fiber laser The collimator system after the beam quality. The study showed that the DS for high power fiber laser alignment beam system, lens material, lens structure and parameters of the actual performance, there is an optimal input power value, the collimation system through rational design, by high energy fiber laser system beam quality. The actual launch of the optical system and the actual atmospheric transmission characteristics, consider transmitting optical system platform mechanical jitter, beam coherence, atmospheric turbulence, thermal blooming, and other factors, the actual high-power fiber laser transmission model, the collimation system, thermal blooming beam transmission performance impact on first consideration. Quantitative analysis of the impact of various factors on the the target target surface energy, and provide a reference for the performance evaluation of the actual high-energy laser system.

Related Dissertations

  1. Master-slave structure SPGD AO control display system key technology research,O437
  2. The Effects of Turbulence on Laser Transmission Quality and Improvement,TN241
  3. The Study of Stochastic-parallel-gradient-descent Adaptive Optics Control Platform Based on DSP,O437
  4. Research of the Regional Characteristics of Gaseous Pollutants and Atmospheric Transport in Beijing and Its Surrounding Areas,X51
  5. Study on the Algorithms of Adaptive Optical Images Restoration,TP391.41
  6. The Study of Adaptive Fiber Coupling Based on of Variable Quality of Laser Beam,TN248
  7. The Study of Adaptive Optics Image Restoration,TP391.41
  8. Study on the Effects and Testing Technology of Atmospheric Turbulence on Space Laser Communication Systems,TN929.12
  9. Research on High Power Er3+ /Yb3+-Codoped All Fiber Laser,TN248.1
  10. Thermal Deformations Influence of Reflector on Propagation Properties of Laser Beams Through Turbulent Atmosphere,TN248
  11. Research on Outputting Technology of High Power Diode Laser Coupling with Optical Fiber,TN253
  12. Research on the Propagation Properties of the Dark Hollow Laser Beams in Atmosphere,TN241
  13. Research of the Stochastic Parallel Gradient Descent Algorithm for Wavefront Control Technique,O439
  14. Study on the Beam-shaping of High-power Laser Diode Bar,TN248
  15. The Research on All-solid-state Cw Single Frequency Nd: YLF Laser,TN248
  16. Study on Factors for Holographic Data Storage,O438.1
  17. Beam measurement and control system design and implementation,TP273
  18. Research of Adaptive Wave Front Reconstruction Based on Improved Neural Network Algorithm,TP183
  19. Optimization Design for 3~5 μm Optical Parametric Oscillator,TN752
  20. Study on the LD Pumped Novel Na+, Yb3+:CaF2 Mode-locking Laser,TN248

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