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。 $nPAm6mH  
处理办法： '2nqHX D  
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。 _*6v|Ed?  
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。 11UB4CA  
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。 h(' )"  
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 ..<3%fL3  
    WA1 .6328                 ! Single wavelength PQ U]l"A  
    UNI MM                     ! Lens is in millimeters 0q6I;$H  
    OBG .35 2                 ! Gaussian object; waist radius -.35 mm; define full aperture as 2 * 1/e**2 point. #"f'7'TE  
    1    TH 22                 ! Surface 2 is 22 mm from the waist. %fjuG  
    2    RD -5 TH 2 GTB S     ! Guess some reasonable lens parameters; use glass type SF6 from Schott catalog SF6 ${hz e<g  
    3    UMC 0.3 YMT 5         ! Solve for the curvature of surface 3 so the marginal ray has an angle of 0.3 Tg ?x3?kw  
                             ! find spacing so ray height is 5 mm on next surface Vpp&|n9^  
    4    RD 20 TH 4 PIN 2     ! Guesses for surface 4 m~`>`4  
    5    UMC 0 TH 50             ! Solve for curvature of 5 so beam is collimated. G|u3UhyB  
    7                         ! Surfaces 6 and 7 exist P?ep]  
    AFOCAL                     ! because they are required for AFOCAL output. =A!S/;z>  
    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 nU z7|y  
    COMPOSITE                    ! Ready a composite definition. {]}s#vvy  
    CD1 P FLUX 0 0 AIP 0 3        ! Composite data number 1 is the flux at a relative Y- coordinate of AIP e}{U7xQm1  
                                ! (defined later) on surface 3. }_OM$nzj  
    = CD1 ]MTbW=*}ED  
    Z1 = FILE 1 x"4%(xBu  
    = 1 + Z1 Iy7pt~DJ,  
    ORD = FILE 1

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    CHG NOP kODK@w V-  
    9 UMC END ,/Cq v   
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    PANT                        ! Start of variable parameter definitions. VLIST RAD ALL    ! Vary all radii. rR{,)fX;  
    VLIST TH 3 5 6 7 8            ! Vary the airspaces and two thicknesses (so AEC works on those elements). END "HIXm  
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    AANT                        ! Start of merit function definition AEC nKh&-E  
    ACC oduDA:  
    LUL 100 1 1 A TOTL            ! Prevent the system from growing too large; assign upper-limit of 150 on TOTL. zY9H%  
    M 5 10 A P YA 0 0 1 0 9            ! Ask for a beam radius of 5 mm on surfaces 9 and 10 15H6:_+=0  
    M 5 10 A P YA 0 0 1 0 10 1cJsj  
    M 0 1 A P FLUX 0 0 1 0 10   ! Ask for a flux falloff of zero at several zones on 10 i u]&;  
    M    0    1    A    P    FLUX    0    0    .98        0    10 "4xfrlOc  
    M    0    1    A    P    FLUX    0    0    .97        0    10 _D!g4"  
    M    0    1    A    P    FLUX    0    0    .96        0    10 %@J1]E;  
    M    0    1    A    P    FLUX    0    0    .95        0    10 JhK/']R  
    M    0    1    A    P    FLUX    0    0    .94        0    10 6j9)/HP  
    M    0    1    A    P    FLUX    0    0    .93        0    10 VM=+afY5M  
    M    0    1    A    P    FLUX    0    0    .92        0    10 2 h|e  
    M    0    1    A    P    FLUX    0    0    .91        0    10 yX/";O
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    M    0    1    A    P    FLUX    0    0    .85        0    10 viaJblYj(f  
    M    0    1    A    P    FLUX    0    0    .8    0        10 h#}YKWL  
    M    0    1    A    P    FLUX    0    0    .7    0        10 )M<vAUF  
    M    0    1    A    P    FLUX    0    0    .5    0        10 kJK,6mN  
    M    0    1    A    P    FLUX    0    0    .3    0        10 xK%=  
    GSO 0 1 5 P                    ! Control the output ray OPD over an SFAN of 5 rays. pd@;b5T  
    END                            ! End of merit function definition. omX?Bl  
    SNAP ]`=X'fED  
    SYNO 100

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    CHG NOP CC >=UF  
    13 UMC END s4= "kT]  
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    PANT                        ! Start of variable parameter definitions. U
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    VLIST RAD ALL                ! Vary all radii. X=X\F@V:u  
    VLIST TH ALL f<jb=\}x  
    END %'Xk)-+y  
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    AANT                        ! Start of merit function definition AEC w
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    ACC xycH~ ?  
    LUL 100 1 1 A TOTL            ! Prevent the system from growing too large } /^C|iS7  
    M 5 10 A P YA 0 0 1 0 LB1   ! Ask for a beam radius of 5 mm on surfaces 9 and 10 vq'c@yw;  
    M 5 10 A P YA 0 0 1 0 LB2 2s ,8R  
    M    0    1    A    P    FLUX    0    0    1 0    1    0       ! Ask for a flux falloff of zero at several zones x2VBm$>  
    M    0    1    A    P    FLUX    0    0    .98    0    LB1 3ha|0[r9  
    M    0    1    A    P    FLUX    0    0    .97    0    LB1 2h^WYpCm  
    M    0    1    A    P    FLUX    0    0    .96    0    LB1 p#d+>7  
    M    0    1    A    P    FLUX    0    0    .95    0    LB1 /FY2vDfU6  
    M    0    1    A    P    FLUX    0    0    .94    0    LB1 ;DRTQn`m  
    M    0    1    A    P    FLUX    0    0    .93    0    LB1 M~T.n)x2  
    M    0    1    A    P    FLUX    0    0    .92    0    LB1 &%aXR A#+  
    M    0    1    A    P    FLUX    0    0    .91    0    LB1 "E!mva*NU  
    M    0    1    A    P    FLUX    0    0    .85    0    LB1 Fw4*  
    M    0    1    A    P    FLUX    0    0    .8    0    LB1 ,\PVC@xJ  
    M    0    1    A    P    FLUX    0    0    .7    0    LB1 'md0]R|  
    M    0    1    A    P    FLUX    0    0    .5    0    LB1 {OMgd3%14  
    M    0    1    A    P    FLUX    0    0    .3    0    LB1 $\
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    GSO 0 1 10 P                ! Control the output ray OPD over an SFAN of 5 rays. GSR 0 50 10 P OJ>.-"  
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    END                            ! End of merit function definition. /!FWuRe^  
    SNAP " BTE  
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    SYNO 40

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    CHG | FM }  
    CFIX m$Y :0_^-  
    1 TH 0 nY-*
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    END C"<s/
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    DPROP P 0 0 13 SURF 3 R    RESAMPLE