强激光与粒子束, 2003, 15 (1): 5, 网络出版: 2006-04-28
近轴光场演化的计算――惠更斯变换
Evolution of paraxial field--Heggens transform
惠更斯变换 短脉冲数值模拟 大尺度准同心腔 高平均功率自由电子激光 Heggens transform short-pulse effects numerical s high average output power FE
摘要
对于远红外自由电子激光使用的大尺度(10m量级)准同心光腔,由于短脉冲效应严重影响功率演化,光束团的数值模拟必须同时考察时域-空域中的演化,因此计算量是巨大的.为了缩小计算量但又不失精确度,发展了一种称为"惠更斯变换"的公式,它以简单的类似基尔霍夫-费涅尔公式的积分运算精确地重现了波荡器之外的光束团演化.
Abstract
The large scale (ten/tens meters) quasi-concentric cavity used in high average output power far-infrared PEL and the short-pulse effects require that the numerical simulation must involve evolution in both space and time, which means huge quantity of calculating. To decrease quantity of calculating and keep accuracy, a new calculating method named Heggens transform is developed which is an integral expression similar to the Kirchhoff-Fresnel expression and can be applied out of undulator.
施义晋, 董保国. 近轴光场演化的计算――惠更斯变换[J]. 强激光与粒子束, 2003, 15(1): 5. 施义晋, 董保国. Evolution of paraxial field--Heggens transform[J]. High Power Laser and Particle Beams, 2003, 15(1): 5.