Experiment research of frequency doubling characteristics in tandem double KTiOPO_4 crystal
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Corresponding author:
SHEN Xue-ju, sxjoptics@yahoo.com.cn
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Received Date:
2012-02-23
Accepted Date:
2012-05-03
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Abstract
In order to study effect of two pieces of potassium titanyl phosphate(KTiOPO4,KTP) crystal in tandem to improve the conversion efficiency of the frequency doubling green lasers,three pieces of KTP crystal in 6mm,8mm,15mm long separately were used in experiments with two of them in tandem.The conversion efficiency curves of monolithic crystal and two tandem crystals were drawn.The results of scheme of two-piece KTP crystal orthogonal or parallel tandem were compared with that of a single monolithic KTP.The result shows that two-piece KTP orthogonal tandem has nearly 10% higher conversion efficiency than two-piece KTP parallel tandem,and two-piece KTP orthogonal tandem has nearly 30% higher conversion efficiency than a monolithic one in the same length with power density at fundamental frequency from 520MW/cm2 to 750MW/cm2.The experimental results have a certain significance in improving the conversion efficiency of frequency doubling green lasers.
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