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以下我們使用一個(gè)很簡(jiǎn)單的共振器范例模型進(jìn)行功能示范 `
0$i^,} 此范例將會(huì)示范如何使用GLAD。我們將使用resonator.inp這個(gè)檔案示范共振器。即使使用者對(duì)共振器不感興趣，這個(gè)范例也將會(huì)展示在GALD中解決問(wèn)題的幾個(gè)重要步驟： \gsJ1@
初始化計(jì)算機(jī)數(shù)組及單位 &\>=4)HB;
選擇波長(zhǎng) nND;
lVQSO
定義初始分布 *{_N*p\{
使用宏進(jìn)行重復(fù)運(yùn)算 !>:SPt l
建立數(shù)據(jù)顯示計(jì)算結(jié)果 c ;?J
此共振器將使用半對(duì)稱的結(jié)構(gòu)進(jìn)行計(jì)算，由半徑50cm的球面鏡及平面鏡所組成。共振器的長(zhǎng)度為46cm。輸出將由平面鏡輸出。下表1顯示其結(jié)構(gòu)參數(shù)： >D
jJ*vM  h;+{0a  I4 |LD/b 圖1-穩(wěn)定的共振器結(jié)構(gòu)。其光腰將會(huì)在平面鏡上形成，及其相曲率將與曲面鏡的理想模態(tài)曲率相同 $:?Dyu(Il 為了簡(jiǎn)化討論，我們將忽略增益及形成bare-cavity分析。我們開(kāi)始分析從準(zhǔn)備一個(gè)命令檔案如下： (*M* muk variab/dec/int pass `q9n`h1
macro/def reson/o &6^ --cc
pass = pass + 1 # increment pass counter $`A{-0=x\U
prop 45 # propagate 45 cm. ;A G&QdTMh
mirror/sph 1 -50 # mirror of 50 cm. radius 2tb+3K1
clap/c/n 1 .14 # .14 cm. radius aperture T@Bu Fr`]<
prop 45 # propagate 45 cm. along beam sYq:2Wn>8Q
mirror/flat 1 # flat mirror r6eZ-V`4
variab/set Energy 1 energy # set variable to energy value Gx7bV}&PN
Energy = Energy - 1 # calculate energy difference /Rf,Rjs
udata/set pass pass Energy # store energy differences zfD@/kU
energy/norm 1 1 # renormalize energy 6b7c9n Z
plot/l 1 xrad=.15 # make a plot at each pass PNo9.-@G
macro/end
>ak C
array/set 1 64 # set array size { 2%'= v
wavelength/set 0 1.064 # set wavelengths x8xz 33
units/set 1 .005 # set .005 cm sample spacing =@nE :uto]
resonator/name reson # set name of resonator macro VA>0Y
resonator/eigen/test 1 # find resonator properties 1COSbi]
resonator/eigen/set 1 # set surrogate beam to eigen mode Q>q-6/|UX
clear 1 0 # clear the array 5hHLC7tT9
noise 1 1 # start from noise y H (3 m#
energy/norm 1 1 # normalize energy ?KB]
/gT^
pass = 0 # initialize pass counter BbM/Rd1tAm
reson/run 100 # run resonator 100 times B"sB0NuT/$
title Energy loss per pass gyQPQ;"H$2
plot/watch plot1.plt # set plot name 4ClSl#X#i
plot/udata min=-.05 max=.0 # plot summary of eigenvalues p"FWAC!
title diffraction mode shape A0>r]<y
set/density 32 # set plot grid to 32 x 32 MgP &9
set/window/abs -.05 .05 -.05 .05 # set plot window 3RX9LJGX
plot/watch plot2.plt # set plot name EJP]
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