| yuwenhui2008 |
2015-07-26 20:41 |
用ASAP高斯光束分解的方法遇到的问题
各位光学专业的大神，我最近在用ASAP对微阶梯反射镜（如附图）进行模拟。一束单色平行光垂直入射到微阶梯反射镜上，用探测器接收反射光。如图，理论上在探测器上应该也是均匀的光场，但是用ＡＳＡＰ的高斯光束分解模拟得到的结果却如图所示。这是为什么呢？ Q`#Y_N-h+
以下是我的ＡＳＡＰ代码，可以拷贝运行一下。 t\2Lo7[Pu
2+pLDIIT
SYSTEM NEW ;IX3w:Aw
RESET tA?P$5?-*
B|#*I[4`w@
UNITS MM cE S3<`[K
WAVELENGTHS 3.7 UM 9;3f`DK@2k
Z/=x(I0
COATING PROPERTIES 0( fN
1 0 'REFLECT' %;0Llxf "
0 0 'ABSORB' bg$df 0
RFyeA.
N
PARABASAL 4 uQ4WM
BEAMS COHERENT DIFFRACT CrHH Ob
WIDTHS 1.6 ;5 W|#{I
R3;GMe@D#
A=1 3| 5Af
N=32 g0w<vD`<g
L=(N)*(A) ( r _xs
D1=0.625E-3 MrIo.
D2=(N)*(D1) Q>s> @hw
!! 微阶梯镜======================= 7<&CN0&
$DO -16 15 1 .%>U A|[~:
{SURFACE W.h6g8|wx
PLANE Z 0 RECTANGLE (A)/2 (L)/2 VIo %((
OBJECT 'MIRROR2_?' 9H5S@w[je
INTERFACE COATING REFLECT AIR AIR OZdiM&Zss
SHIFT X (A)*?+(A)/2 )]Xj"V2
SHIFT Z (D2)*? l%h0x*?$
} 8 /Z
GROUP MIRROR2_? 2T!pFcc
SHIFT Z (L) o @[yF<
ROTATE X -90 0 0 m_~!Lj[u.
!! DETECTOR====================== aL @myq.
SURFACE & mj98
PLANE Y -(2*L) RECTANGLE (L)/2 (L)/2 F Vkb9(WW
OBJECT 'DETECTOR' mjUln8Jc
INTERFACE COATING ABSORB AIR AIR j["b*X`8G
!! SOURCE ======================= TqK`X#Zq
GRID RECT Y -(L) -(L)/2 (L)/2 -(L)/2 (L)/2 (256) (256) 0sW=;R2
SOURCE DIR 0 1 0 i,>yIPBU!
!! !!TRACE PLOT========================= X
10 (oT
!!WINDOW Y Z gE^
{@^
!!PLOT FACETS 5 5 !!OVERLAY '6*^s&H~
TRACE!! PLOT qn}w]yGW
!!$VIEW p(/PG+
D 2x-Wa
CONSIDER ONLY DETECTOR !!CONSIDER ONLY DUMY Q/ rOIHiI
WINDOW X -(L)/2 (L)/2 Z -(L)/2 (L)/2 ~0 <?^
PIXELS (256) j!9p#JK#u
SPREAD NORMAL @O b$w1c
DISPLAY \nM$qr'`B
!! FORM 0.5 [4'C4Zl
PICTURE ,a& N1G.
RETURN
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