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Investigation Of LD-Side-Pumped Highrepetition Rate 670nm RED Laser

Posted on:2012-04-14Degree:MasterType:Thesis
Country:ChinaCandidate:Z Q YuFull Text:PDF
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Because of the important application in the laser color display, laser measurement, high-density holographic storage, laser printing, and laser medical of the high-power solid-state red of laser has been widespread research focus. With the increasing demand for the application of the red light, higher requirements have been proposed, such as output power, repetition rate, beam quality and pulse width. This requires solving the technology issues which the low gain of the emission line in the laser working matter at 1.34μm and the low efficiency of nonlinear frequency conversion.This paper the 670nm red laser has been obtained using the LD side-pumped NdrYAP 1.3μm laser by the saturable absorber V:YAG passively Q-switched and the LBO intracavity frequency doubled. First proposed use the V:YAG as Q-components for high repetition rate red laser, in order to obtain high-repetition-rate red light provides a new method. The main contents are as follows:(1)By comparing the characteristics of laser working matter at 1.3um, reasonable choice the laser working matter and the pumping method, first proposed by the technical solutions of the LD side-pumped Nd:YAP crystal, V:YAG passively Q-switched, LBO intracavity frequency doubling to obtain the red light output.(2)We simulate the phase matching curve, the effective nonlinear coefficient, walk-off angle and acceptance angle of the frequency doubling crystal by MATLAB software. Comparative analysis the characteristics of the red frequency doubling crystal, choose the best frequency doubling crystal and the best phase matching.(3)According to the theory of the equivalent thermal lens and the ABCD transfer matrix theory, Simulated the cavity structure of the high repetition rate red light experiments, the cavity structure parameters were optimally designed.(4)Based on the theoretical analysis, experimental research was carrying on. The output power, pulse width, and repetition rate of the red light has been researched by using the different cavity structure and different initial transmission of the V:YAG. And the conversion efficiency of the red light has been researched by changing the different positions and length of the frequency doubling crystal in the cavity. Finally obtain the maximum average output power of the red light is 1.29W.
Keywords/Search Tags:red laser, saturable absorber, passively Q-switched, intracavity frequency doubling
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