球面激光光束整形器：SYNOPSYS 光学设计软件

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激光器的输出具有非均匀的高斯强度分布，并且对于某些应用，人们希望使其均匀分布。 这是激光束整形器的工作需求。 0oiz V;B5%  
处理办法： ?X5Y8n]y\h  
这项工作可以通过多种方式完成。 对于具有球面的简单透镜，它需要以重新分布光的方式平衡大量的球差，降低光束中心处的能量密度，同时在边缘附近增加光束。 使用非球面表面更容易，其中人们可以更好地控制要引入的像差量，如果使用衍射光学元件，则更容易控制。 问题是后者比球面镜片贵得多，所以我们希望看到我们可以先做些什么。 =>en<#[\:  
考虑到这一点，我们将尝试一种全部使用球面透镜的方法，以确定我们可以制作光束的均匀程度以及我们需要多少元件。 让我们从一个非常简单的设置开始，我们将继续优化。 6l,oL'$}P1  
将腰半径为0.35mm的HeNe激光器转换成直径为10mm且均匀至10％以内的光束。 e_Un:r@)  
这是我们输入的初始结构：

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    RLE                         ! Beginning of lens input file. ID LASER BEAM SHAPER yG..B  
    WA1 .6328                 ! Single wavelength ey ;94n:<  
    UNI MM                     ! Lens is in millimeters ?Ja&LNI9S  
    OBG .35 2                 ! Gaussian object; waist radius -.35 mm; define full aperture as 2 * 1/e**2 point. 5kbbeO|0G  
    1    TH 22                 ! Surface 2 is 22 mm from the waist. U2TR>0l  
    2    RD -5 TH 2 GTB S     ! Guess some reasonable lens parameters; use glass type SF6 from Schott catalog SF6 2(5<Wj"  
    3    UMC 0.3 YMT 5         ! Solve for the curvature of surface 3 so the marginal ray has an angle of 0.3 ;(I')[R"  
                             ! find spacing so ray height is 5 mm on next surface ;.EW7`)Z  
    4    RD 20 TH 4 PIN 2     ! Guesses for surface 4 66 @#V  
    5    UMC 0 TH 50             ! Solve for curvature of 5 so beam is collimated. RP|/rd]-k  
    7                         ! Surfaces 6 and 7 exist -H
-:b7  
    AFOCAL                     ! because they are required for AFOCAL output. Q-7C'|  
    END                         ! End of lens input file.

JT(6Uf  
    FLUX 100 P 3

\:vHB!2E  
    DD: DO MACRO FOR AIP = -1 TO 1 vn"+x_  
    COMPOSITE                    ! Ready a composite definition. :+*q,lX8  
    CD1 P FLUX 0 0 AIP 0 3        ! Composite data number 1 is the flux at a relative Y- coordinate of AIP _G0_<WH6  
                                ! (defined later) on surface 3. ).l`N&_peM  
    = CD1 pS6p}S=1]  
    Z1 = FILE 1 yDe6f(D  
    = 1 + Z1 t'{IE!_  
    ORD = FILE 1

9S_PZH  
    CHG NOP (2uF<$7(  
    9 UMC END :/<SJ({q  
DElrY)3O.  
    PANT                        ! Start of variable parameter definitions. VLIST RAD ALL    ! Vary all radii. T j(MIFi|5  
    VLIST TH 3 5 6 7 8            ! Vary the airspaces and two thicknesses (so AEC works on those elements). END "\`>Ll  
Wb{0UkApJ  
    AANT                        ! Start of merit function definition AEC }p|S3/G?$!  
    ACC O3KTKL]  
    LUL 100 1 1 A TOTL            ! Prevent the system from growing too large; assign upper-limit of 150 on TOTL. 3LW_qX  
    M 5 10 A P YA 0 0 1 0 9            ! Ask for a beam radius of 5 mm on surfaces 9 and 10 {'@`:p&3r  
    M 5 10 A P YA 0 0 1 0 10 eEl71  
    M 0 1 A P FLUX 0 0 1 0 10   ! Ask for a flux falloff of zero at several zones on 10 Mv?$zV"`#  
    M    0    1    A    P    FLUX    0    0    .98        0    10 ic;M=dsh:  
    M    0    1    A    P    FLUX    0    0    .97        0    10 SPN5H;{[]K  
    M    0    1    A    P    FLUX    0    0    .96        0    10  ,7h0y  
    M    0    1    A    P    FLUX    0    0    .95        0    10 -~] q?k?  
    M    0    1    A    P    FLUX    0    0    .94        0    10 &,8F!)[9  
    M    0    1    A    P    FLUX    0    0    .93        0    10 z)Gd3C  
    M    0    1    A    P    FLUX    0    0    .92        0    10 M~eXC  
    M    0    1    A    P    FLUX    0    0    .91        0    10 $H8B%rT]  
    M    0    1    A    P    FLUX    0    0    .85        0    10 N> jQe  
    M    0    1    A    P    FLUX    0    0    .8    0        10 /nWBol,  
    M    0    1    A    P    FLUX    0    0    .7    0        10 Ek6z[G` O  
    M    0    1    A    P    FLUX    0    0    .5    0        10 f"RS,]  
    M    0    1    A    P    FLUX    0    0    .3    0        10 H ]z83:Z  
    GSO 0 1 5 P                    ! Control the output ray OPD over an SFAN of 5 rays. 5_7y1  
    END                            ! End of merit function definition. c4V%
>A  
    SNAP W"n0x8~sV  
    SYNO 100

dt||nF  
    CHG NOP Z^!% b  
    13 UMC END |i\%>Y,  
["^? vhv  
    PANT                        ! Start of variable parameter definitions. aqEmF  
    VLIST RAD ALL                ! Vary all radii. Jo''yrJpB  
    VLIST TH ALL /b7]NC%  
    END |/;;uK,y  
FDal;T  
    AANT                        ! Start of merit function definition AEC U'aJCM  
    ACC U#Wg"W{  
    LUL 100 1 1 A TOTL            ! Prevent the system from growing too large E?- ~*T
 
    M 5 10 A P YA 0 0 1 0 LB1   ! Ask for a beam radius of 5 mm on surfaces 9 and 10 H~ E<ek'~  
    M 5 10 A P YA 0 0 1 0 LB2 H
tV8=.^  
    M    0    1    A    P    FLUX    0    0    1 0    1    0       ! Ask for a flux falloff of zero at several zones |*$0~mA  
    M    0    1    A    P    FLUX    0    0    .98    0    LB1 X;]Ijha<*  
    M    0    1    A    P    FLUX    0    0    .97    0    LB1 fE"-W{M  
    M    0    1    A    P    FLUX    0    0    .96    0    LB1 Z 4QL&?U  
    M    0    1    A    P    FLUX    0    0    .95    0    LB1 1
ixBwnp?  
    M    0    1    A    P    FLUX    0    0    .94    0    LB1 $0Ys{m  
    M    0    1    A    P    FLUX    0    0    .93    0    LB1 !oa/\p  
    M    0    1    A    P    FLUX    0    0    .92    0    LB1 JNv@MJb}  
    M    0    1    A    P    FLUX    0    0    .91    0    LB1 @jCMQYR  
    M    0    1    A    P    FLUX    0    0    .85    0    LB1 Ihp Ea,v)  
    M    0    1    A    P    FLUX    0    0    .8    0    LB1 iNr&;  
    M    0    1    A    P    FLUX    0    0    .7    0    LB1 fjCFJ_  
    M    0    1    A    P    FLUX    0    0    .5    0    LB1 "5204I  
    M    0    1    A    P    FLUX    0    0    .3    0    LB1 &F:%y(;{Y  
    GSO 0 1 10 P                ! Control the output ray OPD over an SFAN of 5 rays. GSR 0 50 10 P )#8}xAjV  
D-FT3Culw  
    END                            ! End of merit function definition. >n3ig~0d  
    SNAP $zM \Jd  
=QK ucLo  
    SYNO 40

g&{CEfw&  
    CHG -<L5;  
    CFIX eLLOE)x  
    1 TH 0 # [ +n(  
    END c/^l2CJ0  
    DPROP P 0 0 13 SURF 3 R    RESAMPLE