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Pulse Evolution Characteristics in Self-Similar Mode-locked Fibre Laser 被引量:1

Pulse Evolution Characteristics in Self-Similar Mode-locked Fibre Laser
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摘要 A self-similar mode locked fibre laser is studied based on a numerical model. By introducing a dimensionless factor k to characterize the pulse shape, the self-similar pulse evolution, formation and the temporal and spectral shape changes due to the elements in the cavity are investigated throughout the laser cavity. The results show that in the self-similar mode locked fibre laser, self-similar pulse is first formed in the single-mode fibre, which is then amplified in the gain fibre. Gain bandwidth has a small influence on pulse shape, so high energy self-similar pulse can be obtained after amplification. Because net cavity dispersion directly influences the pulse width as well as peak power after compression by a pair of gratings, which can determine the pulse self-similar evolution, it is very important to control the net cavity dispersion to a certain range to obtain self-similar pulses. A self-similar mode locked fibre laser is studied based on a numerical model. By introducing a dimensionless factor k to characterize the pulse shape, the self-similar pulse evolution, formation and the temporal and spectral shape changes due to the elements in the cavity are investigated throughout the laser cavity. The results show that in the self-similar mode locked fibre laser, self-similar pulse is first formed in the single-mode fibre, which is then amplified in the gain fibre. Gain bandwidth has a small influence on pulse shape, so high energy self-similar pulse can be obtained after amplification. Because net cavity dispersion directly influences the pulse width as well as peak power after compression by a pair of gratings, which can determine the pulse self-similar evolution, it is very important to control the net cavity dispersion to a certain range to obtain self-similar pulses.
机构地区 Institute of Physics
出处 《Chinese Physics Letters》 SCIE CAS CSCD 2007年第11期3175-3178,共4页 中国物理快报(英文版)
基金 Supported by the National Natural Science Foundation of China under Grant No 60677013, and the Doctoral Program Foundation of Institute of Higher Education of China under Grant No 20060055021.
关键词 coated conductor buffer layer self-epitaxy CEO2 coated conductor, buffer layer, self-epitaxy, CeO2
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