| Summary: | 碩士 === 國立中山大學 === 光電工程研究所 === 85 === A compact continue-wave all solid-state green laser can provide stable output beam with TEM00 transverse mode and single longitudinal mode. The excellent performance of which inhibits high quality spatial laser beam and power intensity exceeds the conventional commerical gas laser and not yet well developed blue-green semiconductor diode laser. Its potential applications include materials characterization, remote sensing, under-water communictaion, pollution detection and optical data-storage consumer electronic products, etc.
In this thesis, we sucessfully implement and study a solid-state green laser system. Using a non-linear crystal for intra-cavity frequency doubling , we obtain 532 nm visible green laser beam with a power of 50 mW. It isthe first domestic high-stable, compact, continue-wave all solid-state green laser.
In addition, we measured the optical properties and parameters on 1064 nm IR and 532 nm visible laser separately. Before frequency doubling, the IR threshold is about 50 mW and the optical slope efficiency is greater than 45%. After frequency doubling, the optical to optical conversion efficiency is greater than 6%.
We also employed a Brewster window to increase the long term stability of the green laser system, the RMS of the green power variation is less than 0.5%, and its linewidth is less than 0.5 GHz.
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