球面激光光束整形器：SYNOPSYS 光学设计软件

g^AQBF  
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。 );5o13h2  
处理办法： R><g\{G]  
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。 k3~9;Z  
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。 0> f!S` *  
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。 IGlR,tw_/  
这是我们输入的初始结构：

o/5-T4  
    RLE                         ! Beginning of lens input file. ID LASER BEAM SHAPER Cf{F"o  
    WA1 .6328                 ! Single wavelength g3R(,IH  
    UNI MM                     ! Lens is in millimeters f6Qr0Op  
    OBG .35 2                 ! Gaussian object; waist radius -.35 mm; define full aperture as 2 * 1/e**2 point. (3#PKfY+  
    1    TH 22                 ! Surface 2 is 22 mm from the waist. +>$]leqa  
    2    RD -5 TH 2 GTB S     ! Guess some reasonable lens parameters; use glass type SF6 from Schott catalog SF6 !l:GrT8J  
    3    UMC 0.3 YMT 5         ! Solve for the curvature of surface 3 so the marginal ray has an angle of 0.3 D /eH~  
                             ! find spacing so ray height is 5 mm on next surface ^D yw(>9  
    4    RD 20 TH 4 PIN 2     ! Guesses for surface 4 qQ@| Cj  
    5    UMC 0 TH 50             ! Solve for curvature of 5 so beam is collimated. 1!#85SMx  
    7                         ! Surfaces 6 and 7 exist |V9[aa*c  
    AFOCAL                     ! because they are required for AFOCAL output. *@U{[J  
    END                         ! End of lens input file.

-YRIe<}E -  
    FLUX 100 P 3

c_lHj#A(l  
    DD: DO MACRO FOR AIP = -1 TO 1 U|^xr~q!f-  
    COMPOSITE                    ! Ready a composite definition. Y\|#Lu>B  
    CD1 P FLUX 0 0 AIP 0 3        ! Composite data number 1 is the flux at a relative Y- coordinate of AIP NBikYxa  
                                ! (defined later) on surface 3. @^{Hq6_`  
    = CD1 s**<=M GK  
    Z1 = FILE 1 7[m?\/K~  
    = 1 + Z1 SZykG
[  
    ORD = FILE 1

?h<4trYcv  
    CHG NOP kZ]H[\Fs  
    9 UMC END 7DB_Z/uU  
1S{Biqi+  
    PANT                        ! Start of variable parameter definitions. VLIST RAD ALL    ! Vary all radii. ]#/nn),Z  
    VLIST TH 3 5 6 7 8            ! Vary the airspaces and two thicknesses (so AEC works on those elements). END `e[S Zj\  
P_bB{~$4  
    AANT                        ! Start of merit function definition AEC uF ?[H -y  
    ACC JsEJ6!1  
    LUL 100 1 1 A TOTL            ! Prevent the system from growing too large; assign upper-limit of 150 on TOTL. Q|y}mC/  
    M 5 10 A P YA 0 0 1 0 9            ! Ask for a beam radius of 5 mm on surfaces 9 and 10 ?R`S-  
    M 5 10 A P YA 0 0 1 0 10 2TK \pfD  
    M 0 1 A P FLUX 0 0 1 0 10   ! Ask for a flux falloff of zero at several zones on 10 ts]e M1;  
    M    0    1    A    P    FLUX    0    0    .98        0    10 lExQp2E  
    M    0    1    A    P    FLUX    0    0    .97        0    10 \#sD`O  
    M    0    1    A    P    FLUX    0    0    .96        0    10 r )|3MUj  
    M    0    1    A    P    FLUX    0    0    .95        0    10 @"w4R6l+*  
    M    0    1    A    P    FLUX    0    0    .94        0    10 JWVV?~1  
    M    0    1    A    P    FLUX    0    0    .93        0    10 s!6lZ mPM  
    M    0    1    A    P    FLUX    0    0    .92        0    10 kpOdyn(  
    M    0    1    A    P    FLUX    0    0    .91        0    10 &L|oqXE0L  
    M    0    1    A    P    FLUX    0    0    .85        0    10 2& Q\W  
    M    0    1    A    P    FLUX    0    0    .8    0        10 R2bqhSlF  
    M    0    1    A    P    FLUX    0    0    .7    0        10 fN vQ.;  
    M    0    1    A    P    FLUX    0    0    .5    0        10 oFk2y^>u  
    M    0    1    A    P    FLUX    0    0    .3    0        10 )f8>kz(  
    GSO 0 1 5 P                    ! Control the output ray OPD over an SFAN of 5 rays.
~ |G&cg  
    END                            ! End of merit function definition. _H]\  
    SNAP !R{IEray  
    SYNO 100

d_[H|H9i6  
    CHG NOP )\wkVAm  
    13 UMC END )"x6V""Rb  
)Q
2Ap&  
    PANT                        ! Start of variable parameter definitions. lg^'/8^f  
    VLIST RAD ALL                ! Vary all radii. v>X!/if<y  
    VLIST TH ALL Z[O hZ 9  
    END HZrA}|:h  
4KPnV+h"b  
    AANT                        ! Start of merit function definition AEC uYW4$6S3  
    ACC oZ{,IZ45  
    LUL 100 1 1 A TOTL            ! Prevent the system from growing too large Jb,54uN  
    M 5 10 A P YA 0 0 1 0 LB1   ! Ask for a beam radius of 5 mm on surfaces 9 and 10 hY}Q|-|  
    M 5 10 A P YA 0 0 1 0 LB2 J,$xQ?,wE  
    M    0    1    A    P    FLUX    0    0    1 0    1    0       ! Ask for a flux falloff of zero at several zones xj5TnE9^  
    M    0    1    A    P    FLUX    0    0    .98    0    LB1 'h$:~C  
    M    0    1    A    P    FLUX    0    0    .97    0    LB1 ?;~!C2Zs  
    M    0    1    A    P    FLUX    0    0    .96    0    LB1 &YFe"C  
    M    0    1    A    P    FLUX    0    0    .95    0    LB1 ]w*"KG!(  
    M    0    1    A    P    FLUX    0    0    .94    0    LB1 "LlpZtw  
    M    0    1    A    P    FLUX    0    0    .93    0    LB1 )x-b+SC  
    M    0    1    A    P    FLUX    0    0    .92    0    LB1 Lf_Y4a#  
    M    0    1    A    P    FLUX    0    0    .91    0    LB1 qI'pjTMDY  
    M    0    1    A    P    FLUX    0    0    .85    0    LB1 Iv6 lE:)  
    M    0    1    A    P    FLUX    0    0    .8    0    LB1 (Cr  
    M    0    1    A    P    FLUX    0    0    .7    0    LB1 a)|y0w)vV  
    M    0    1    A    P    FLUX    0    0    .5    0    LB1 4*_jGw  
    M    0    1    A    P    FLUX    0    0    .3    0    LB1 q<AnWNheE  
    GSO 0 1 10 P                ! Control the output ray OPD over an SFAN of 5 rays. GSR 0 50 10 P 9.)z]Gav  
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    END                            ! End of merit function definition. `IN!#b+Eo  
    SNAP i)l0[FNI}  
&M-vKc"d  
    SYNO 40

.!q_jl%U  
    CHG 3a:Hx| Yg  
    CFIX 0 u*a=f=  
    1 TH 0 hpf0fU  
    END c5p,~z_Dtu  
    DPROP P 0 0 13 SURF 3 R    RESAMPLE