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Study Of All-Solid-State Single Frequency Laser Technology

Posted on:2011-04-08Degree:MasterType:Thesis
Country:ChinaCandidate:W F ZhaoFull Text:PDF
GTID:2178360305454106Subject:Optical Engineering
Abstract/Summary:PDF Full Text Request
All-solid-state single-frequency laser is advantage of narrow line width, good frequency stability, compact and long life, so it is a important part in the all-solid-state laser field. The 1.06μm single-frequency laser has broad prospect in the scientific research, military, industrial manufacturing and medical applications, so it has became the research focus in the international research; at the same time, the 1.06μm single-frequency laser is the base of studying other wavelength single-frequency lasers and nonlinear frequency conversion to generate other wavelength single-frequency lasers. In the all-solid-state single-frequency laser, single-frequency and high power is always the two important research points, all-solid-state high power single-frequency laser has very important application prospect in many areas such as industry, medical, military, in particular, nonlinear frequency conversation technology has an urgent demand for pulsed single-frequency high power lasers, but high power output and single-frequency operation is often difficult to simultaneously achieve.The second chapter introduces the theory of single-frequency laser, and it is the theoretical basis of this paper. This chapter introduced the theory of laser mode, the rate equation theory, the spatial distribution of the pump laser and the oscillating laser and the single frequency detection device. The theory of laser mode is the based to understand the laser characteristics, design and debug the laser cavity, and it is the based to research and master the laser technology and application. The rate equation theory researches the basic relation of the atomic spontaneous emission, stimulated emission and stimulated absorption, and it is the fundamental theoretical calculations. The spatial distribution of the pump laser and the oscillating laser is very important for the operation of single transverse. The single frequency detection device has the decisive role in experimental result. The four parts is the theory basis for realizing the single-frequency laser.The third chapter is the preparation of this thesis experiment. First, measure some experimental parameters, such as the thermal focal length, the size of the pump laser and so on. Second, according to these known parameters, design the laser cavity and analyze the factor of astigmatism. Finally, using the theory, calculate the threshold and efficiency of the laser, and the result is agree with the experimental results. The preparation of this chapter provides practical guidance for the following experiments, make the following experiments change the experiment parameters, obtain the better results.The fourth chapter is the experiment part of this paper, and it is also the vital part. In this chapter, we introduce the experimental research of the 12 W Nd:YVO4 single frequency laser, the research of pulsed single frequency laser, Nd:GdVO4 single frequency laser, the research of 1319nm laser and the preliminary study of sum-frequency generation. On the basis of the last chapter, we obtain 12 W single frequency laser output with 56% of the slope efficiency. To the best of our knowledge, this is the highest slope efficiency in single-frequency Nd:YVO4 ring laser. The efficiency of the single frequency laser is close to the limit of the efficiency theoretically.
Keywords/Search Tags:All-solid-state laser, single-frequency laser, ring laser
PDF Full Text Request
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