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以下我们使用一个很简单的共振器范例模型进行功能示范
>?Y)evW 此范例将会示范如何使用GLAD。我们将使用resonator.inp这个档案示范共振器。即使使用者对共振器不感兴趣,这个范例也将会展示在GALD中解决问题的几个重要步骤: !Cqm=q{K 初始化计算机数组及单位 ~bm
VpoI 选择波长 bx!uHL= 定义初始分布 3C:!\R 使用宏进行重复运算 4)]w"z0Pc 建立数据显示计算结果 cL+--$L 此共振器将使用半对称的结构进行计算,由半径50cm的球面镜及平面镜所组成。共振器的长度为46cm。输出将由平面镜输出。下表1显示其结构参数: CMQlxX? 0P MF)';R (~59}lu~ 图1-稳定的共振器结构。其光腰将会在平面镜上形成,及其相曲率将与曲面镜的理想模态曲率相同 T/[8w 为了简化讨论,我们将忽略增益及形成bare-cavity分析。我们开始分析从准备一个命令档案如下: )7X+T'?% variab/dec/int pass Kmk}Yz macro/def reson/o #sHA!@ | pass = pass + 1 # increment pass counter -|1H-[Y( prop 45 # propagate 45 cm. G,jv Mb`+ mirror/sph 1 -50 # mirror of 50 cm. radius [{s 1=c clap/c/n 1 .14 # .14 cm. radius aperture Vki'pAN prop 45 # propagate 45 cm. along beam sObH#/l` mirror/flat 1 # flat mirror nqp:nw variab/set Energy 1 energy # set variable to energy value ;Avz%2#c` Energy = Energy - 1 # calculate energy difference R1!F mZW8 udata/set pass pass Energy # store energy differences B~%'YQk energy/norm 1 1 # renormalize energy A$6T) plot/l 1 xrad=.15 # make a plot at each pass {"^LUw8fd macro/end ,5Vc
array/set 1 64 # set array size ywSV4ZtM wavelength/set 0 1.064 # set wavelengths Sio> QL Y units/set 1 .005 # set .005 cm sample spacing |3Fo4K%+ resonator/name reson # set name of resonator macro $A4rdhvd resonator/eigen/test 1 # find resonator properties =)h<" 2 resonator/eigen/set 1 # set surrogate beam to eigen mode G<F+/Oi&DX clear 1 0 # clear the array `&3hfiI} noise 1 1 # start from noise /]xu=q2 energy/norm 1 1 # normalize energy qVHXZdGL pass = 0 # initialize pass counter |igr3p5Fw reson/run 100 # run resonator 100 times PZT]H? title Energy loss per pass *\-R& |