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arXiv physics/0101004physics.optics
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克尔透镜锁模激光器中超短脉冲的光谱特性

Spectral Characteristics of Ultrashort Pulses in Kerr-lens Mode-Locked Lasers

V. L. Kalashnikov, E. Sorokin, I. T. Sorokina

摘要:

研究了影响克尔透镜锁模Cr:LiSGaF激光器中飞秒脉冲光谱位置的几个因素:高阶色散、增益饱和、基态重吸收和受激拉曼散射。利用一维数值模型对激光腔进行了模拟,比较了不同因素对激光腔的相对贡献。拉曼效应提供了最大的自频移从增益峰值(高达60 nm),其次是增益饱和(25 nm),而高阶色散的贡献是微不足道的(5 nm)。通过与实验数据的比较,证实了受激喇曼散射是Cr:LiSGaF和Cr:LiSAF激光器超短脉冲自频移的主要原因

英文摘要:

A number of factors that influence spectral position of the femtosecond pulse in a Kerr-lens modelocked Cr:LiSGaF laser have been identified: high-order dispersion, gain saturation, reabsorption from the ground state, and stimulated Raman scattering. Using the one-dimensional numerical model for the simulation of the laser cavity, the relative contributions of different factors have been compared. The Raman effect provides the largest self-frequency shift from the gain peak (up to 60 nm), followed by the gain saturation (25 nm), while the high-order dispersion contribution is insignificant (5 nm). Comparison with the experimental data confirm that the stimulated Raman scattering is a main cause of the ultrashort pulse self-frequency shift observed in Cr:LiSGaF and Cr:LiSAF lasers

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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