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5 September 2002 LD pumped combined crystal Cr4+:YAG-Nd3+:YAG self Q-switched laser
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Using the combined crystal Cr4+:YAG -Nd3+:YAG pumped by LD, the selfQ-switched laser pulses are obtained. The combined crystal with 8mm long and 1mm diameter is doped with 0.2% Cr4+ in one side and 1.1% Nd3+ in the other side. As the gain medium and the saturable absorber simultaneously in one material, this laser possesses a compact structure and high efficiency. Using the Laser diode CW pumping Cr4+:YAG -Nd3+:YAG single crystal micro-cylinder, the self Q-switched laser pulses with the pulse width of iOns and the pulse repetition rate of 10KHz are obtained. The average output power is I 8mW. From the rate equations considering the saturable absorption the pulse width and repetition rate vs. pump power are theoretically calculated. From this theory the pulse duration and output power of single pulse are independent of the pumping power, but the repetition rate almost linear increased with the pumping power. These results agree with the experimental measurements.
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Jun Chen, Biqing Ye, and Jianhong Ge "LD pumped combined crystal Cr4+:YAG-Nd3+:YAG self Q-switched laser", Proc. SPIE 4913, Semiconductor Lasers and Applications, (5 September 2002);


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