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。 Vk/!_)  
处理办法： 6Ch [!=p{  
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。 :q.g#:1s  
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。 TA.ugF)h  
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。 DaV:Slp9  
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 c?;YufH'j
 
    WA1 .6328                 ! Single wavelength KZ"&c~[  
    UNI MM                     ! Lens is in millimeters <Oi65O_X  
    OBG .35 2                 ! Gaussian object; waist radius -.35 mm; define full aperture as 2 * 1/e**2 point. 8+>r!)Q+  
    1    TH 22                 ! Surface 2 is 22 mm from the waist. F.s*^}L[  
    2    RD -5 TH 2 GTB S     ! Guess some reasonable lens parameters; use glass type SF6 from Schott catalog SF6 ^4
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    3    UMC 0.3 YMT 5         ! Solve for the curvature of surface 3 so the marginal ray has an angle of 0.3 ne=?'e4  
                             ! find spacing so ray height is 5 mm on next surface ,-11w7y\  
    4    RD 20 TH 4 PIN 2     ! Guesses for surface 4 ]Cfjs33H  
    5    UMC 0 TH 50             ! Solve for curvature of 5 so beam is collimated. mM> L0  
    7                         ! Surfaces 6 and 7 exist T=EHue$  
    AFOCAL                     ! because they are required for AFOCAL output. %[<@$qP  
    END                         ! End of lens input file.

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7  
    FLUX 100 P 3

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    DD: DO MACRO FOR AIP = -1 TO 1 Dsl,(qm5  
    COMPOSITE                    ! Ready a composite definition. 4@iMGYR9!s  
    CD1 P FLUX 0 0 AIP 0 3        ! Composite data number 1 is the flux at a relative Y- coordinate of AIP r9nyEzk  
                                ! (defined later) on surface 3. Q"6:W2#v  
    = CD1 y@#JzfY?Hr  
    Z1 = FILE 1 b9F:X  
    = 1 + Z1 A5UZUU^  
    ORD = FILE 1

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    CHG NOP sjZ@}Vk3b  
    9 UMC END DOsQVdH  
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A5cm  
    PANT                        ! Start of variable parameter definitions. VLIST RAD ALL    ! Vary all radii. lU
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    VLIST TH 3 5 6 7 8            ! Vary the airspaces and two thicknesses (so AEC works on those elements). END &>@  
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    AANT                        ! Start of merit function definition AEC 'lsG?  
    ACC ^69ZX61vt  
    LUL 100 1 1 A TOTL            ! Prevent the system from growing too large; assign upper-limit of 150 on TOTL. S'h{["P~ 0  
    M 5 10 A P YA 0 0 1 0 9            ! Ask for a beam radius of 5 mm on surfaces 9 and 10 7f$ hg8  
    M 5 10 A P YA 0 0 1 0 10 Z[,A>tJ  
    M 0 1 A P FLUX 0 0 1 0 10   ! Ask for a flux falloff of zero at several zones on 10 w1Xe9'$Qb  
    M    0    1    A    P    FLUX    0    0    .98        0    10 j(QK0"z  
    M    0    1    A    P    FLUX    0    0    .97        0    10 +Fk]hCL  
    M    0    1    A    P    FLUX    0    0    .96        0    10 aqw;T\GI+~  
    M    0    1    A    P    FLUX    0    0    .95        0    10 S [$Os7  
    M    0    1    A    P    FLUX    0    0    .94        0    10 `|rr<Tsy\  
    M    0    1    A    P    FLUX    0    0    .93        0    10 $:RP tG  
    M    0    1    A    P    FLUX    0    0    .92        0    10 <Z>p1S  
    M    0    1    A    P    FLUX    0    0    .91        0    10 #:)yh]MP  
    M    0    1    A    P    FLUX    0    0    .85        0    10 r(VGdG  
    M    0    1    A    P    FLUX    0    0    .8    0        10 !wU~;sL8C3  
    M    0    1    A    P    FLUX    0    0    .7    0        10 tO@n3"O  
    M    0    1    A    P    FLUX    0    0    .5    0        10 fF|m~#y  
    M    0    1    A    P    FLUX    0    0    .3    0        10 ,.
K}uW  
    GSO 0 1 5 P                    ! Control the output ray OPD over an SFAN of 5 rays. X!AD]sK  
    END                            ! End of merit function definition. MYlPG1X=?  
    SNAP  EOn[!  
    SYNO 100

rIhe}1  
    CHG NOP
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    13 UMC END
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&~ .n}h&  
    PANT                        ! Start of variable parameter definitions. B7u4e8(E*  
    VLIST RAD ALL                ! Vary all radii. 3c|u2Pl  
    VLIST TH ALL M
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    END % k}+t3aF  
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    AANT                        ! Start of merit function definition AEC v6#i>n~x,  
    ACC s~)I1G  
    LUL 100 1 1 A TOTL            ! Prevent the system from growing too large \Q~HL_fy|Y  
    M 5 10 A P YA 0 0 1 0 LB1   ! Ask for a beam radius of 5 mm on surfaces 9 and 10 z7PmyU >  
    M 5 10 A P YA 0 0 1 0 LB2 px~:'U  
    M    0    1    A    P    FLUX    0    0    1 0    1    0       ! Ask for a flux falloff of zero at several zones #$?!P1  
    M    0    1    A    P    FLUX    0    0    .98    0    LB1 dJf#j?\[  
    M    0    1    A    P    FLUX    0    0    .97    0    LB1 ;&~9k?v7L  
    M    0    1    A    P    FLUX    0    0    .96    0    LB1 O~bJ<O=?  
    M    0    1    A    P    FLUX    0    0    .95    0    LB1 #FwTV@  
    M    0    1    A    P    FLUX    0    0    .94    0    LB1 $;Nw_S@  
    M    0    1    A    P    FLUX    0    0    .93    0    LB1 D
x*tolF  
    M    0    1    A    P    FLUX    0    0    .92    0    LB1 i9O;D*  
    M    0    1    A    P    FLUX    0    0    .91    0    LB1 w dpd`  
    M    0    1    A    P    FLUX    0    0    .85    0    LB1 8IQqDEY^  
    M    0    1    A    P    FLUX    0    0    .8    0    LB1 }^"#&w3<  
    M    0    1    A    P    FLUX    0    0    .7    0    LB1 EjjW%"C,  
    M    0    1    A    P    FLUX    0    0    .5    0    LB1 j3$\+<m]  
    M    0    1    A    P    FLUX    0    0    .3    0    LB1 a*3h|b<  
    GSO 0 1 10 P                ! Control the output ray OPD over an SFAN of 5 rays. GSR 0 50 10 P zAA3bgaa  
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    END                            ! End of merit function definition. y=k!>Y|E  
    SNAP e'MLLC[  
9_&N0>OF  
    SYNO 40

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    CHG ?'%9  
    CFIX RuBL_Vi  
    1 TH 0 @S#Ls="G  
    END 9zac[tno  
    DPROP P 0 0 13 SURF 3 R    RESAMPLE