| 2.1 micron laser has received considerable attention from many researchers for its unique characters. It has presented more and more comprehensive prospects for a wide range of applications including medical diagnosis and treatment, eye-safe ranger-finder, photoelectric counterwork and laser lidar.In this thesis, theoretically, the radiation mechanism of Cr:Tm:Ho:YAG is expatiated at first. Experimentally, the Cr:Tm:Ho:YAG rod and the optical pumping source are chosen carefully; Influence of different design of pumping chamber on the laser system and reflected efficiency of geometric projection and illumination uniformity has been analyzed, and the design of the chamber has been optimized. Several usual resonant cavities have been discussed, the optimized cavity has been obtained basing on the fact, and the waist radius of Gaussian beams and the dimensions of light spot on two mirrors have been solved. The suitable indication light has been chosen, because He-Ne laser can not transmit Cr:Tm:Ho:YAG crystals. Steady resonant cavity assemble have been designed. Separate cooling style has been used in the laser system, and the cooling system has been designed.The switch power has been designed for pumping-source, whose simmer current, charge current and discharge current have been fixed and debugged; the maximum output arrives 110J, the pulses width of xenon flash lamp is about 500 μs, and two lamps discharge synchronously. Charge voltage of energy storage capacitor has been controlled by lower voltage, and their corresponding relationship has been measured. Programmed single chip microcomputer controls discharge of energy storage capacitor accurately, which solve continuous arc downright.At the end of this thesis, a summary analyze experimental results briefly; some suggestions to improve further work are presented. |
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