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《Transactions of Beijing Institute of Technology》 2006-01
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6.65 W Output of LD-Pumped Double-Clad Fiber Single-Frequency Amplifier

SUN Wen-feng,ZHAO Chang-ming,YANG Su-hui,LI Lei (Department of Optical Engineering,School of Information Science and Technology,Beijing Institute of Technology,Beijing100081,China)  
The coupling efficiency of the amplifier and the factors affecting the output power improvement are investigated.The pumping source is a fiber coupled laser diode array with radiation at 976 nm,and the gain medium is a D-shaped doubleclad fiber with the length of(4.4 m,) The signal laser is a non-planar ring oscillator.The coupling efficiency for pump and signal are 80% and 44%,respectively.Output power 6.65 W was obtained when the launched pumping power is 24 W and the signal power is 200 mW.In experiment,the input signal was not saturated,so the amplification has the potential to be improved.
【Fund】: 国家部委预研项目(41302010107)
【CateGory Index】: TN722
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