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变换极限脉冲泵浦的飞秒脉冲光参量产生的理论研究
Theoretical Research on Femtosecond Pulse Optical Parametric Generation by Transform-Limited Pump Pulses
【摘要】 建立了一个超短脉冲(USP)光参量产生(OPG)过程的理论模型,综合考虑了泵浦光的消耗、介质损耗、相位失配、泵浦光、信号光和闲频光之间的群速度失配(GVM)和脉冲内的群速度色散(IGVD)等因素,导出耦合波方程组,对耦合波方程组进行数值求解并对USPOPG过程作数值计算,详细研究了GVM参数、IGVD参数、泵浦光的强度和脉宽以及信号光波长的调谐对USPOPG的转换效率、输出脉冲的脉宽和对称性等特性的影响.
【Abstract】 A general theory of ultrashort-pulse (USP) optical parametric generation (OPG) that accounts for pump depletion, loss, phase mismatch, group-velocity mismatch (GVM) among the pump, signal and idler pulses, and intrapulse group-velocity dispersion (IGVD) is presented. The coupled differential equations are numerically solved and the USP-OPG process is calculated. The effects of the GVM parameters, the IGVD parameters, the pump intensity, the pump pulse duration and the signal wavelength on the characteristics of USP-OPG (the OPG conversion efficiency, the duration and the asymmetry degree of the signal pulse) are studied.
【Key words】 optical parametric generation; femtosecond pulses; group-velocity mismatch;
- 【文献出处】 中央民族大学学报(自然科学版) ,Journal of The Central University For Nationalities(Natural Science Edition) , 编辑部邮箱 ,2005年03期
- 【分类号】TN24
- 【被引频次】3
- 【下载频次】148