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。 !$hi:3{U,  
处理办法： x']Fe7nv  
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。 82M`sk3.  
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。 )*XD"-9  
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。 U38~m}c  
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 \iP5.3C  
    WA1 .6328                 ! Single wavelength !(HPx@_  
    UNI MM                     ! Lens is in millimeters wJZuJ(  
    OBG .35 2                 ! Gaussian object; waist radius -.35 mm; define full aperture as 2 * 1/e**2 point. ox*>HkV  
    1    TH 22                 ! Surface 2 is 22 mm from the waist. fKW)h?.Kd  
    2    RD -5 TH 2 GTB S     ! Guess some reasonable lens parameters; use glass type SF6 from Schott catalog SF6 K3iQ/j~aq  
    3    UMC 0.3 YMT 5         ! Solve for the curvature of surface 3 so the marginal ray has an angle of 0.3 v5\5:b{/  
                             ! find spacing so ray height is 5 mm on next surface TM5 Y(Q*  
    4    RD 20 TH 4 PIN 2     ! Guesses for surface 4 MD^,"!A  
    5    UMC 0 TH 50             ! Solve for curvature of 5 so beam is collimated. U=WS]  
    7                         ! Surfaces 6 and 7 exist LS$zA>:  
    AFOCAL                     ! because they are required for AFOCAL output. unih"};ou  
    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 R@-x!*z  
    COMPOSITE                    ! Ready a composite definition. TlowEh8r  
    CD1 P FLUX 0 0 AIP 0 3        ! Composite data number 1 is the flux at a relative Y- coordinate of AIP .1}1e;f-  
                                ! (defined later) on surface 3. 3RanAT.nu:  
    = CD1  wX5q=I  
    Z1 = FILE 1 "BVp37m;?  
    = 1 + Z1  T  5F)  
    ORD = FILE 1

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    CHG NOP KIcIYCBz  
    9 UMC END sQJGwZ7  
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    PANT                        ! Start of variable parameter definitions. VLIST RAD ALL    ! Vary all radii. 1yZA_x15:  
    VLIST TH 3 5 6 7 8            ! Vary the airspaces and two thicknesses (so AEC works on those elements). END yIcTc  
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    AANT                        ! Start of merit function definition AEC q
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    ACC FZ
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    LUL 100 1 1 A TOTL            ! Prevent the system from growing too large; assign upper-limit of 150 on TOTL. #%2d;V  
    M 5 10 A P YA 0 0 1 0 9            ! Ask for a beam radius of 5 mm on surfaces 9 and 10 C[}UQod0  
    M 5 10 A P YA 0 0 1 0 10 }lDX3h
 
    M 0 1 A P FLUX 0 0 1 0 10   ! Ask for a flux falloff of zero at several zones on 10 .9J}Z^FD  
    M    0    1    A    P    FLUX    0    0    .98        0    10 YVwpqOE.=  
    M    0    1    A    P    FLUX    0    0    .97        0    10 k qL.ZR  
    M    0    1    A    P    FLUX    0    0    .96        0    10 f@$W5*j  
    M    0    1    A    P    FLUX    0    0    .95        0    10 BM/o7%]n  
    M    0    1    A    P    FLUX    0    0    .94        0    10 Ix6\5}.c9  
    M    0    1    A    P    FLUX    0    0    .93        0    10 .1q}mw   
    M    0    1    A    P    FLUX    0    0    .92        0    10 lcm3wJ'w  
    M    0    1    A    P    FLUX    0    0    .91        0    10 @ ?M\[qeF@  
    M    0    1    A    P    FLUX    0    0    .85        0    10 Pmo<t6  
    M    0    1    A    P    FLUX    0    0    .8    0        10 n|{#5#  
    M    0    1    A    P    FLUX    0    0    .7    0        10 ) $_1U!z  
    M    0    1    A    P    FLUX    0    0    .5    0        10 DnFzCJ  
    M    0    1    A    P    FLUX    0    0    .3    0        10 tj'~RQvO  
    GSO 0 1 5 P                    ! Control the output ray OPD over an SFAN of 5 rays. @lF?+/=$  
    END                            ! End of merit function definition. [8a(4]4  
    SNAP W} i6{Vh  
    SYNO 100

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    CHG NOP jwT` Z  
    13 UMC END zQ|2D*W  
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    PANT                        ! Start of variable parameter definitions. fJ[ ^_,O  
    VLIST RAD ALL                ! Vary all radii. .Pponmy  
    VLIST TH ALL {KNaJ/:>W  
    END J<;io!  
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    AANT                        ! Start of merit function definition AEC I09 W=  
    ACC y\Aa;pL)RQ  
    LUL 100 1 1 A TOTL            ! Prevent the system from growing too large $C;i}q#  
    M 5 10 A P YA 0 0 1 0 LB1   ! Ask for a beam radius of 5 mm on surfaces 9 and 10 e{@RBYX@+c  
    M 5 10 A P YA 0 0 1 0 LB2 eO <N/?t  
    M    0    1    A    P    FLUX    0    0    1 0    1    0       ! Ask for a flux falloff of zero at several zones lG\uJxV  
    M    0    1    A    P    FLUX    0    0    .98    0    LB1 \ saV8U7B  
    M    0    1    A    P    FLUX    0    0    .97    0    LB1 Vo@7G@7K(  
    M    0    1    A    P    FLUX    0    0    .96    0    LB1 B{`adq?pW  
    M    0    1    A    P    FLUX    0    0    .95    0    LB1 RJ'[m~yl5X  
    M    0    1    A    P    FLUX    0    0    .94    0    LB1 B=TUZ)  
    M    0    1    A    P    FLUX    0    0    .93    0    LB1 KU,SAcfR7  
    M    0    1    A    P    FLUX    0    0    .92    0    LB1 U L $!  
    M    0    1    A    P    FLUX    0    0    .91    0    LB1 .oyA
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    M    0    1    A    P    FLUX    0    0    .85    0    LB1 |${4sUR  
    M    0    1    A    P    FLUX    0    0    .8    0    LB1 ~^1y(-cw  
    M    0    1    A    P    FLUX    0    0    .7    0    LB1 2L~Vr4eHG  
    M    0    1    A    P    FLUX    0    0    .5    0    LB1 ^)~Smj^d  
    M    0    1    A    P    FLUX    0    0    .3    0    LB1 `s}L3bR]  
    GSO 0 1 10 P                ! Control the output ray OPD over an SFAN of 5 rays. GSR 0 50 10 P ICN>kJ\;M  
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    END                            ! End of merit function definition. &T,|?0>~=J  
    SNAP F<,pAxl~@  
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    SYNO 40

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    CHG T/3LJGnY  
    CFIX 1?Y>Xz  
    1 TH 0 lV$JCNe  
    END Z<i}XCE  
    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)  D~C'1C&W