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。 4mo/MK&M:  
处理办法： _`\!+qGq  
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。 1;=L] L?  
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。 =+j3E<w  
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。 Hm'"I!jyO  
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 o(jLirnk  
    WA1 .6328                 ! Single wavelength ANu>*  
    UNI MM                     ! Lens is in millimeters [//i "Nm  
    OBG .35 2                 ! Gaussian object; waist radius -.35 mm; define full aperture as 2 * 1/e**2 point. Io3-\Ff  
    1    TH 22                 ! Surface 2 is 22 mm from the waist. [d[w/@  
    2    RD -5 TH 2 GTB S     ! Guess some reasonable lens parameters; use glass type SF6 from Schott catalog SF6 U; oXX  
    3    UMC 0.3 YMT 5         ! Solve for the curvature of surface 3 so the marginal ray has an angle of 0.3 P5_Ajb(@'  
                             ! find spacing so ray height is 5 mm on next surface ^{MqJ\S7H  
    4    RD 20 TH 4 PIN 2     ! Guesses for surface 4 xNOKa*  
    5    UMC 0 TH 50             ! Solve for curvature of 5 so beam is collimated. I{(!h90  
    7                         ! Surfaces 6 and 7 exist OU,FU@6,7w  
    AFOCAL                     ! because they are required for AFOCAL output. OmWEa  
    END                         ! End of lens input file.

L4/ns@e  
    FLUX 100 P 3

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    DD: DO MACRO FOR AIP = -1 TO 1 H;nzo3x  
    COMPOSITE                    ! Ready a composite definition. :wIA.1bK}  
    CD1 P FLUX 0 0 AIP 0 3        ! Composite data number 1 is the flux at a relative Y- coordinate of AIP }/1^Lqfnz  
                                ! (defined later) on surface 3. .-rz30xT  
    = CD1 ,ZJ}X 9$<  
    Z1 = FILE 1 EZB0qZIp  
    = 1 + Z1 ^vd$j-kjTP  
    ORD = FILE 1

IwnDG;+Ap  
    CHG NOP Fw&ImRMk  
    9 UMC END i`F5  
cF15Mm
2  
    PANT                        ! Start of variable parameter definitions. VLIST RAD ALL    ! Vary all radii. ]j7`3%4uK  
    VLIST TH 3 5 6 7 8            ! Vary the airspaces and two thicknesses (so AEC works on those elements). END F!#)l*OX;  
/Kli C\  
    AANT                        ! Start of merit function definition AEC np^&cY]  
    ACC i_*yS+Z;  
    LUL 100 1 1 A TOTL            ! Prevent the system from growing too large; assign upper-limit of 150 on TOTL. E6~VHQa2?  
    M 5 10 A P YA 0 0 1 0 9            ! Ask for a beam radius of 5 mm on surfaces 9 and 10 s7 nl  
    M 5 10 A P YA 0 0 1 0 10 vOlfyH>  
    M 0 1 A P FLUX 0 0 1 0 10   ! Ask for a flux falloff of zero at several zones on 10 V"4L=[le  
    M    0    1    A    P    FLUX    0    0    .98        0    10 'Jf LTG.  
    M    0    1    A    P    FLUX    0    0    .97        0    10 9)tb=  
    M    0    1    A    P    FLUX    0    0    .96        0    10 ~fkcal1@  
    M    0    1    A    P    FLUX    0    0    .95        0    10 $5G(_   
    M    0    1    A    P    FLUX    0    0    .94        0    10 2Ty]s~  
    M    0    1    A    P    FLUX    0    0    .93        0    10 Wd;t(5Xl  
    M    0    1    A    P    FLUX    0    0    .92        0    10 3#,6(k4>  
    M    0    1    A    P    FLUX    0    0    .91        0    10 `e'wWV  
    M    0    1    A    P    FLUX    0    0    .85        0    10 m^L!_~  
    M    0    1    A    P    FLUX    0    0    .8    0        10 xbCR4upS  
    M    0    1    A    P    FLUX    0    0    .7    0        10 k5-4^
 
    M    0    1    A    P    FLUX    0    0    .5    0        10 *.nSv@F  
    M    0    1    A    P    FLUX    0    0    .3    0        10 >A{Dpsi\  
    GSO 0 1 5 P                    ! Control the output ray OPD over an SFAN of 5 rays. 0a:oC(Ak  
    END                            ! End of merit function definition. 'M6+(`x  
    SNAP }'wZ)N@  
    SYNO 100

-51LF=(!L  
    CHG NOP ZbT$f^o}M]  
    13 UMC END {?lndBP<  
wyX3qH  
    PANT                        ! Start of variable parameter definitions. -'qVnu  
    VLIST RAD ALL                ! Vary all radii. RP{0+  
    VLIST TH ALL yOz6a :r  
    END _(g0$vRP~  
O'98OH+u  
    AANT                        ! Start of merit function definition AEC $Z)u04;&@  
    ACC 0#TL$?=|  
    LUL 100 1 1 A TOTL            ! Prevent the system from growing too large ?0:]%t18  
    M 5 10 A P YA 0 0 1 0 LB1   ! Ask for a beam radius of 5 mm on surfaces 9 and 10 ,!Q nh:  
    M 5 10 A P YA 0 0 1 0 LB2
TsT5BC63  
    M    0    1    A    P    FLUX    0    0    1 0    1    0       ! Ask for a flux falloff of zero at several zones 9Zd\6F,  
    M    0    1    A    P    FLUX    0    0    .98    0    LB1 `Ns@W?  
    M    0    1    A    P    FLUX    0    0    .97    0    LB1 9l~D}5e7  
    M    0    1    A    P    FLUX    0    0    .96    0    LB1 dz+!yE\f$  
    M    0    1    A    P    FLUX    0    0    .95    0    LB1 TOG4=y-N  
    M    0    1    A    P    FLUX    0    0    .94    0    LB1 (y; 6H  
    M    0    1    A    P    FLUX    0    0    .93    0    LB1 E`_T_O=P  
    M    0    1    A    P    FLUX    0    0    .92    0    LB1 >z%YKdq  
    M    0    1    A    P    FLUX    0    0    .91    0    LB1 AR( gI]1  
    M    0    1    A    P    FLUX    0    0    .85    0    LB1 F<{,W-my `  
    M    0    1    A    P    FLUX    0    0    .8    0    LB1 LTS{[(%  
    M    0    1    A    P    FLUX    0    0    .7    0    LB1 *;}xg{@  
    M    0    1    A    P    FLUX    0    0    .5    0    LB1 nG4ZOx.*1g  
    M    0    1    A    P    FLUX    0    0    .3    0    LB1 5FJLDT2Lg  
    GSO 0 1 10 P                ! Control the output ray OPD over an SFAN of 5 rays. GSR 0 50 10 P |*JMPg?zI  
!`N:.+DT  
    END                            ! End of merit function definition. zx<PX
 
    SNAP  t* Ct*  
Lqxhy s  
    SYNO 40

Mm*V;ADF  
    CHG U -OD  
    CFIX y'`7zJ  
    1 TH 0 D"aK;_W@h  
    END <QvVPE}z   
    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)  $]#8D>E&