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《Acta Optica Sinica》 2009-11
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Self-Similar Propagation and Amplification of High-Power Pulses in Large Mode Area Ytterbium Doped Fiber

Xu Dangpeng Wang Jianjun Lin Honghua Deng Ying Zhang Rui Li Mingzhong (Research Center of Laser Fusion,China Academy of Engineering Physics,Mianyang,Sichuan 621900,China)  
The self-similar solutions of the nonlinear Schrdinger equation for the high-power pulses propagated and amplified in the gain fiber are analyzed,which result showing that when the pulse duration and energy satisfied the certain relation,the seed pulse can be propagated and amplified in the gain fiber by optimizing the length of the gain fiber.The key self-similar evolution parameters of the seed pulse in the gain fiber are investigated.When the injection energy is 400 pJ and the pulse duration is 200 fs,the propagation and amplification characteristics of the secant,Gaussian,and super Gaussian seed pulses propagated and amplified in the large mode area gain fiber whose core diameter is 30 μm are numerical simulated.The results show that the temporal and spectral profiles of the three kinds of seed pulses are evolved into parabolic profiles and broadened.However,there are strong oscillations structure on the edges of the spectral profile.Moreover,the output pulse is linearly chirped parabolic pulse,which is easy to compress and has very important significance for realizing the all fiber high power ultra-short pulse generation system.
【Fund】: 国家863计划(2007AA4303)资助课题
【CateGory Index】: TN253
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Chinese Journal Full-text Database 2 Hits
1 FENG Jie XU Wencheng ZHANG Qiaofen SONG Fang MO Jiexiong LIU Songhao School of Physics & Telecommunication Engineering, South China Normal University, Guangzhou 510006 School of Information & Optoelectronic Science and Engineering,South China Normal University, Guangzhou 510006;Self-Similar Pulse Evolution in Optical Fibers[J];Laser & Optoelectronics Progress;2006-10
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