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。 @X+m,u  
处理办法： &l"/G%W  
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。 d00#;R  
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。 Y#S<:,/sb?  
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。
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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 n/6#rj^$  
    WA1 .6328                 ! Single wavelength Q^prHn*@  
    UNI MM                     ! Lens is in millimeters Q@?8-  
    OBG .35 2                 ! Gaussian object; waist radius -.35 mm; define full aperture as 2 * 1/e**2 point. GK.^Gd  
    1    TH 22                 ! Surface 2 is 22 mm from the waist. 0uV3J  
    2    RD -5 TH 2 GTB S     ! Guess some reasonable lens parameters; use glass type SF6 from Schott catalog SF6 _8A  
    3    UMC 0.3 YMT 5         ! Solve for the curvature of surface 3 so the marginal ray has an angle of 0.3 U$v|c%6  
                             ! find spacing so ray height is 5 mm on next surface (hNTr(z  
    4    RD 20 TH 4 PIN 2     ! Guesses for surface 4 p4GhT~)l:  
    5    UMC 0 TH 50             ! Solve for curvature of 5 so beam is collimated. cWjb149@)  
    7                         ! Surfaces 6 and 7 exist 7rQwn2XD{  
    AFOCAL                     ! because they are required for AFOCAL output. rV84?75(Y  
    END                         ! End of lens input file.

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    FLUX 100 P 3

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    DD: DO MACRO FOR AIP = -1 TO 1 B|pO2de  
    COMPOSITE                    ! Ready a composite definition. #(swVo:+E  
    CD1 P FLUX 0 0 AIP 0 3        ! Composite data number 1 is the flux at a relative Y- coordinate of AIP
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                                ! (defined later) on surface 3. fh_+M"Y0`  
    = CD1 Lh%z2 5t  
    Z1 = FILE 1 }py)EI,U  
    = 1 + Z1 WX .Ax$fT  
    ORD = FILE 1

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    CHG NOP M~%P1@%  
    9 UMC END Q$+6f,m#W  
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    PANT                        ! Start of variable parameter definitions. VLIST RAD ALL    ! Vary all radii. 5aj%<r  
    VLIST TH 3 5 6 7 8            ! Vary the airspaces and two thicknesses (so AEC works on those elements). END b@QCdi,u  
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    AANT                        ! Start of merit function definition AEC L0l'4RRm\  
    ACC Cj%n?-
  
    LUL 100 1 1 A TOTL            ! Prevent the system from growing too large; assign upper-limit of 150 on TOTL. Pi+p
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    M 5 10 A P YA 0 0 1 0 9            ! Ask for a beam radius of 5 mm on surfaces 9 and 10 R2Es~T  
    M 5 10 A P YA 0 0 1 0 10 8Q%g<jX*  
    M 0 1 A P FLUX 0 0 1 0 10   ! Ask for a flux falloff of zero at several zones on 10 >|X )  
    M    0    1    A    P    FLUX    0    0    .98        0    10 &F- \t5X=i  
    M    0    1    A    P    FLUX    0    0    .97        0    10 j,n\`7dD$  
    M    0    1    A    P    FLUX    0    0    .96        0    10 O22Q g  
    M    0    1    A    P    FLUX    0    0    .95        0    10 BG|
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    M    0    1    A    P    FLUX    0    0    .94        0    10 J':X$>
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    M    0    1    A    P    FLUX    0    0    .93        0    10 E1r-$gf_  
    M    0    1    A    P    FLUX    0    0    .92        0    10 vA3wn><  
    M    0    1    A    P    FLUX    0    0    .91        0    10 = N&5]Z  
    M    0    1    A    P    FLUX    0    0    .85        0    10 GYZP?E p*  
    M    0    1    A    P    FLUX    0    0    .8    0        10 =yF]#>Ah  
    M    0    1    A    P    FLUX    0    0    .7    0        10 rjffpU  
    M    0    1    A    P    FLUX    0    0    .5    0        10 (Bq^ D9  
    M    0    1    A    P    FLUX    0    0    .3    0        10 N0DzFXp  
    GSO 0 1 5 P                    ! Control the output ray OPD over an SFAN of 5 rays. D@2L<!\  
    END                            ! End of merit function definition. +7\d78U  
    SNAP GO?hB4 9T  
    SYNO 100

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    CHG NOP V408uy-M  
    13 UMC END [ *Dj7zt:  
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    PANT                        ! Start of variable parameter definitions. A XhP3B]  
    VLIST RAD ALL                ! Vary all radii. ph}%Ay$  
    VLIST TH ALL qJ sH  
    END yR?./M!  
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    AANT                        ! Start of merit function definition AEC jDb"|l  
    ACC WkiPrQ0]:  
    LUL 100 1 1 A TOTL            ! Prevent the system from growing too large TjDtNE  
    M 5 10 A P YA 0 0 1 0 LB1   ! Ask for a beam radius of 5 mm on surfaces 9 and 10 %s497'  
    M 5 10 A P YA 0 0 1 0 LB2 u^G Y7gah  
    M    0    1    A    P    FLUX    0    0    1 0    1    0       ! Ask for a flux falloff of zero at several zones (\D E1q  
    M    0    1    A    P    FLUX    0    0    .98    0    LB1 gu6%$z  
    M    0    1    A    P    FLUX    0    0    .97    0    LB1 "fr{:'HX  
    M    0    1    A    P    FLUX    0    0    .96    0    LB1 Nm !~h|3  
    M    0    1    A    P    FLUX    0    0    .95    0    LB1 &|j0GP&  
    M    0    1    A    P    FLUX    0    0    .94    0    LB1 ;yajt\a  
    M    0    1    A    P    FLUX    0    0    .93    0    LB1 `Xz!apA  
    M    0    1    A    P    FLUX    0    0    .92    0    LB1 76bMy4re  
    M    0    1    A    P    FLUX    0    0    .91    0    LB1 dB6['z)2  
    M    0    1    A    P    FLUX    0    0    .85    0    LB1 "u]&~$  
    M    0    1    A    P    FLUX    0    0    .8    0    LB1 &r.M~k >  
    M    0    1    A    P    FLUX    0    0    .7    0    LB1 J%-4ZB"  
    M    0    1    A    P    FLUX    0    0    .5    0    LB1 99.F'Gz  
    M    0    1    A    P    FLUX    0    0    .3    0    LB1 ~o#mX?'7  
    GSO 0 1 10 P                ! Control the output ray OPD over an SFAN of 5 rays. GSR 0 50 10 P !zvjgDlZv  
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    END                            ! End of merit function definition. Fgi`g{N  
    SNAP ,jEc4ih4  
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    SYNO 40

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    CHG Xp_m=QQsm  
    CFIX i(pHJP:a:  
    1 TH 0 ]+46r!r|  
    END {aNpk,n  
    DPROP P 0 0 13 SURF 3 R    RESAMPLE