SYNOPSYS 光学设计软件课程十一：球形激光光束整形器

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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。 RiFw?Q+  
处理办法： ]tt} #  
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，所以我们要明白我们想要一个什么样的结果。 MagMZR  
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结构开始。 hW2.8f$  
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。 q<{NO/M
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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 v}uJtBG(  
    WA1 .6328                 ! Single wavelength 83iCL;GS=  
    UNI MM                     ! Lens is in millimeters *l>0t]5YH  
    OBG .35 2                 ! Gaussian object; waist radius -.35 mm; define full aperture as 2 * 1/e**2 point. ;vp\YIeX1  
    1    TH 22                 ! Surface 2 is 22 mm from the waist. K"{HseN{  
    2    RD -5 TH 2 GTB S     ! Guess some reasonable lens parameters; use glass type SF6 from Schott catalog SF6 A7-r<s  
    3    UMC 0.3 YMT 5         ! Solve for the curvature of surface 3 so the marginal ray has an angle of 0.3 e!x6bR9EZ  
                             ! find spacing so ray height is 5 mm on next surface BWq/TG=>  
    4    RD 20 TH 4 PIN 2     ! Guesses for surface 4 FY#!
N L  
    5    UMC 0 TH 50             ! Solve for curvature of 5 so beam is collimated. $Ua56Y  
    7                         ! Surfaces 6 and 7 exist =Hu0v}i/  
    AFOCAL                     ! because they are required for AFOCAL output. pyB~M9Bp/  
    END                         ! End of lens input file.

1B:aC|B  
    FLUX 100 P 3

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    DD: DO MACRO FOR AIP = -1 TO 1 @h9MxCE!  
    COMPOSITE                    ! Ready a composite definition. M]EsS^/X  
    CD1 P FLUX 0 0 AIP 0 3        ! Composite data number 1 is the flux at a relative Y- coordinate of AIP 4A.Q21s  
                                ! (defined later) on surface 3. tIZ~^*'  
    = CD1 J !#Zi#8sF  
    Z1 = FILE 1 Fi;VDK(V9  
    = 1 + Z1 T] | d5E  
    ORD = FILE 1

}STYG`  
    CHG NOP < K%j  
    9 UMC END ]> G&jd7  
tL(BpL'  
    PANT                        ! Start of variable parameter definitions. VLIST RAD ALL    ! Vary all radii.
O6c\KFBSJ  
    VLIST TH 3 5 6 7 8            ! Vary the airspaces and two thicknesses (so AEC works on those elements). END ?b:_AO&  
>- Bg%J9  
    AANT                        ! Start of merit function definition AEC ~L?nq@DL  
    ACC O!F]^'!  
    LUL 100 1 1 A TOTL            ! Prevent the system from growing too large; assign upper-limit of 150 on TOTL. hx!7w}[A  
    M 5 10 A P YA 0 0 1 0 9            ! Ask for a beam radius of 5 mm on surfaces 9 and 10 tk?UX7F  
    M 5 10 A P YA 0 0 1 0 10 >P(`MSc  
    M 0 1 A P FLUX 0 0 1 0 10   ! Ask for a flux falloff of zero at several zones on 10 M?@pN<|  
    M    0    1    A    P    FLUX    0    0    .98        0    10 y\PxR708  
    M    0    1    A    P    FLUX    0    0    .97        0    10 Re[:qLa]  
    M    0    1    A    P    FLUX    0    0    .96        0    10 *|RS*ABte  
    M    0    1    A    P    FLUX    0    0    .95        0    10 (FVX57  
    M    0    1    A    P    FLUX    0    0    .94        0    10 9){  
    M    0    1    A    P    FLUX    0    0    .93        0    10 96ZdM=  
    M    0    1    A    P    FLUX    0    0    .92        0    10 i/qTFQst _  
    M    0    1    A    P    FLUX    0    0    .91        0    10 GjQfi'vCk  
    M    0    1    A    P    FLUX    0    0    .85        0    10 ]((i?{jb(  
    M    0    1    A    P    FLUX    0    0    .8    0        10 #gv4  
    M    0    1    A    P    FLUX    0    0    .7    0        10 %xlpB75N4N  
    M    0    1    A    P    FLUX    0    0    .5    0        10 vXcy#  
    M    0    1    A    P    FLUX    0    0    .3    0        10 w6zBVi  
    GSO 0 1 5 P                    ! Control the output ray OPD over an SFAN of 5 rays. 5K.+CO<  
    END                            ! End of merit function definition. ;VzMU ;j  
    SNAP 2{o10eL  
    SYNO 100

J!p<oW)a!  
    CHG NOP km 5E)_]  
    13 UMC END \ TL82H@D  
oXGZK5w<l  
    PANT                        ! Start of variable parameter definitions. 'mV:@].le  
    VLIST RAD ALL                ! Vary all radii. dgc&[  
    VLIST TH ALL /lH'hcXcX  
    END v\0^mp  
%z)EO9vtr  
    AANT                        ! Start of merit function definition AEC GU6qIz|  
    ACC m&El)  
    LUL 100 1 1 A TOTL            ! Prevent the system from growing too large 5~}!@yzc  
    M 5 10 A P YA 0 0 1 0 LB1   ! Ask for a beam radius of 5 mm on surfaces 9 and 10 )I9aC~eAD  
    M 5 10 A P YA 0 0 1 0 LB2 0m=(W^c  
    M    0    1    A    P    FLUX    0    0    1 0    1    0       ! Ask for a flux falloff of zero at several zones 80&D""  
    M    0    1    A    P    FLUX    0    0    .98    0    LB1 a%J/0'(d  
    M    0    1    A    P    FLUX    0    0    .97    0    LB1 >oY^Gx  
    M    0    1    A    P    FLUX    0    0    .96    0    LB1 *cNk>y  
    M    0    1    A    P    FLUX    0    0    .95    0    LB1 W~dE  
    M    0    1    A    P    FLUX    0    0    .94    0    LB1 8S>>7z!U  
    M    0    1    A    P    FLUX    0    0    .93    0    LB1 Pj!%ym3A  
    M    0    1    A    P    FLUX    0    0    .92    0    LB1 !0jq6[&  
    M    0    1    A    P    FLUX    0    0    .91    0    LB1 fVUKvZ}P*  
    M    0    1    A    P    FLUX    0    0    .85    0    LB1 0k1MKzi Q  
    M    0    1    A    P    FLUX    0    0    .8    0    LB1 K&S@F!#g  
    M    0    1    A    P    FLUX    0    0    .7    0    LB1 rPTfpeqN)  
    M    0    1    A    P    FLUX    0    0    .5    0    LB1 cU | _  
    M    0    1    A    P    FLUX    0    0    .3    0    LB1 +x]e-P%  
    GSO 0 1 10 P                ! Control the output ray OPD over an SFAN of 5 rays. GSR 0 50 10 P ETelbj;0  
Sx&mv.?X  
    END                            ! End of merit function definition. zoXuFg  
    SNAP t2.juoI(  
eH[y[~r  
    SYNO 40

v>k b^38  
    CHG C$y fMK,,N  
    CFIX _z%\
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    1 TH 0 4Q&mC"  
    END y`+<X{V5L  
    DPROP P 0 0 13 SURF 3 R    RESAMPLE

火车污污:很有收获，谢谢楼主 (2019-02-26 15:21)  <w%DyRFw3