基于耗散孤子种子的啁啾脉冲光纤放大系统输出特性  

Output pulse compressibility of the chirped pulse fiber amplification based on the dissipative solitons

作　　者：时雷[1] 马挺[1] 吴浩煜 孙青[2] 马金栋[1] 路桥[1] 毛庆和[1] 

机构地区：[1]中国科学院安徽光学精密机械研究所,安徽省光子器件与材料重点实验室,合肥230031 [2]中国计量科学研究院,光学与激光计量科学研究所,北京100029

出　　处：《物理学报》2016年第8期136-143,共8页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:61377044,61275186,61205099);国家重点基础研究发展计划(批准号:2013CB934304);中国计量科学研究院基本科研业务费(批准号:AKY1404)资助的课题~~

摘　　要：以不同滤波器带宽下获得的全正色散光纤激光器耗散孤子作为啁啾脉冲放大(CPA)系统的种子脉冲,研究了光栅对和光纤展宽器CPA系统输出脉冲的可压缩性.结果表明,对于大能量耗散孤子种子脉冲,当CPA系统采用正色散光纤展宽器时,光纤群速色散与自相位调制之间的相互作用不仅可抑制耗散孤子脉冲光谱调制的影响,还可使脉冲在光纤展宽器中自相似演化,从而可提高CPA输出脉冲的可压缩性.通过优化光纤展宽器长度,对于耗散孤子种子源,采用光纤展宽器的CPA系统输出脉冲可压缩性与主脉冲所占脉冲总能量之比均优于采用光栅对展宽器时的情况.The all-normal-dispersion mode locked fiber laser can produce the dissipative soliton pulses because the laser can tolerate much more nonlinear phase shift than the other mode locked fiber lasers. Such large energy mode locked fiber lasers are excellent seed pulse sources for generating very large-energy ultrashort pulses with fiber chirped pulse amplification（CPA） systems. However, the spectral amplitude modulation carried by the dissipative soliton pulses will severely restrict the compressibility of the output pulses from the typical CPA system. Therefore, it is necessary to investigate and design a suitable CPA system for improving the compressibility of the output pulses according to the properties of dissipative solitons. In this paper, using the dissipative solitons generated by the all-normal-dispersion fiber laser with different spectral filter bandwidths as the input seed pulses, the compressible properties of the pulses for the CPA system with both the grating pair stretcher and the fiber stretcher are investigated. Our simulation results show that, for such a large-energy dissipative soliton seed pulse, when the grating pair stretcher is used in the CPA system,the spectral amplitude modulation of the seed pulse can be mapped to the temporal amplitude modulation by the stretcher, and amplified by the subsequent fiber amplifier, which introduces additional nonlinear phase, finally restricts the compressibility of the output pulses; when the normal-dispersion fiber stretcher is used, the interaction between the group velocity dispersion and the self-phase modulation can not only eliminate the influence of the modulated spectrum of the dissipative soliton on the compressible properties of the pulses, but also make it possible to evolve the pulse self-similarity in the fiber stretcher, and thus improve the compressibility of the output pulses of the CPA system. For the normal-dispersion fiber stretcher CPA system, the compressibility of the output pulses is mainly determined by the fiber stretcher leng

关 键 词：耗散孤子 啁啾脉冲放大 脉冲展宽 脉冲压缩 

分 类 号：TN253[电子电信—物理电子学]