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。 HHcWyu  
处理办法： tEE4"OAy  
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。 -J\R}9 lIm  
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。 D*o5fPvFO
 
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。 o1?bqVF;6  
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 5`H.{4@  
    WA1 .6328                 ! Single wavelength %6eQ;Rp*  
    UNI MM                     ! Lens is in millimeters t0-)\kXcA  
    OBG .35 2                 ! Gaussian object; waist radius -.35 mm; define full aperture as 2 * 1/e**2 point. rI.CCPY~s
 
    1    TH 22                 ! Surface 2 is 22 mm from the waist. >y{oC5S  
    2    RD -5 TH 2 GTB S     ! Guess some reasonable lens parameters; use glass type SF6 from Schott catalog SF6 )$oboAv#  
    3    UMC 0.3 YMT 5         ! Solve for the curvature of surface 3 so the marginal ray has an angle of 0.3 y|(C L^(  
                             ! find spacing so ray height is 5 mm on next surface Tj v)jD  
    4    RD 20 TH 4 PIN 2     ! Guesses for surface 4 k2Y *  
    5    UMC 0 TH 50             ! Solve for curvature of 5 so beam is collimated. UK!PMkX  
    7                         ! Surfaces 6 and 7 exist Lx#CFrLQ*  
    AFOCAL                     ! because they are required for AFOCAL output. T(2*P5%&  
    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 V4>qR{5  
    COMPOSITE                    ! Ready a composite definition. %=EN 3>,  
    CD1 P FLUX 0 0 AIP 0 3        ! Composite data number 1 is the flux at a relative Y- coordinate of AIP #$;i 4a  
                                ! (defined later) on surface 3. 3L1MMUACL  
    = CD1 uXkc07 r'  
    Z1 = FILE 1 nXFPoR)T  
    = 1 + Z1 a7YzX5n  
    ORD = FILE 1

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    CHG NOP &8xwR   
    9 UMC END .mwB'Ll  
8K@>BFk1.  
    PANT                        ! Start of variable parameter definitions. VLIST RAD ALL    ! Vary all radii. =%Z5"];  
    VLIST TH 3 5 6 7 8            ! Vary the airspaces and two thicknesses (so AEC works on those elements). END poU1Q#+4p*  
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    AANT                        ! Start of merit function definition AEC /(jG9RM  
    ACC s=[T
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    LUL 100 1 1 A TOTL            ! Prevent the system from growing too large; assign upper-limit of 150 on TOTL. }8&?  
    M 5 10 A P YA 0 0 1 0 9            ! Ask for a beam radius of 5 mm on surfaces 9 and 10 KbTd`AIL  
    M 5 10 A P YA 0 0 1 0 10 ,:=g}i  
    M 0 1 A P FLUX 0 0 1 0 10   ! Ask for a flux falloff of zero at several zones on 10 tB)nQw7  
    M    0    1    A    P    FLUX    0    0    .98        0    10 ,d`6 {ll  
    M    0    1    A    P    FLUX    0    0    .97        0    10 z`esst\aV  
    M    0    1    A    P    FLUX    0    0    .96        0    10 Or3GrZ!H  
    M    0    1    A    P    FLUX    0    0    .95        0    10 -50Qy[0."  
    M    0    1    A    P    FLUX    0    0    .94        0    10 b9RJ>K  
    M    0    1    A    P    FLUX    0    0    .93        0    10 )&vuT q'7'  
    M    0    1    A    P    FLUX    0    0    .92        0    10 wT>~7$=L{  
    M    0    1    A    P    FLUX    0    0    .91        0    10 cf+EQY  
    M    0    1    A    P    FLUX    0    0    .85        0    10 Gr8%%]1!0  
    M    0    1    A    P    FLUX    0    0    .8    0        10 CAa&,ZR  
    M    0    1    A    P    FLUX    0    0    .7    0        10 HnsPXF'8g  
    M    0    1    A    P    FLUX    0    0    .5    0        10 cyTBp58  
    M    0    1    A    P    FLUX    0    0    .3    0        10 .Q5zmaA]  
    GSO 0 1 5 P                    ! Control the output ray OPD over an SFAN of 5 rays. Rv)*Wo!L  
    END                            ! End of merit function definition. .NSV%I  
    SNAP 4l rKU^-  
    SYNO 100

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    CHG NOP WJTc/  
    13 UMC END MREB  
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    PANT                        ! Start of variable parameter definitions. a3J' c  
    VLIST RAD ALL                ! Vary all radii. Z9q1z~qSQ  
    VLIST TH ALL e:+[}I)  
    END Rrw6\iO  
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    AANT                        ! Start of merit function definition AEC %;,4qB  
    ACC "@YtxYTW-  
    LUL 100 1 1 A TOTL            ! Prevent the system from growing too large 5Zuk`%O  
    M 5 10 A P YA 0 0 1 0 LB1   ! Ask for a beam radius of 5 mm on surfaces 9 and 10 >X
PR)&t  
    M 5 10 A P YA 0 0 1 0 LB2 pmc)$3u  
    M    0    1    A    P    FLUX    0    0    1 0    1    0       ! Ask for a flux falloff of zero at several zones e7r3o,!  
    M    0    1    A    P    FLUX    0    0    .98    0    LB1 >udu~  
    M    0    1    A    P    FLUX    0    0    .97    0    LB1 Vl/fkd,Z  
    M    0    1    A    P    FLUX    0    0    .96    0    LB1  N<~LgH  
    M    0    1    A    P    FLUX    0    0    .95    0    LB1 1Vx>\A  
    M    0    1    A    P    FLUX    0    0    .94    0    LB1 rEwd76?  
    M    0    1    A    P    FLUX    0    0    .93    0    LB1 {RN-rF3w  
    M    0    1    A    P    FLUX    0    0    .92    0    LB1 j~Mx^ivwj  
    M    0    1    A    P    FLUX    0    0    .91    0    LB1 VQ;'SY:`  
    M    0    1    A    P    FLUX    0    0    .85    0    LB1 M'nzoRk  
    M    0    1    A    P    FLUX    0    0    .8    0    LB1 ,wZq~;2  
    M    0    1    A    P    FLUX    0    0    .7    0    LB1 0@wXE\s  
    M    0    1    A    P    FLUX    0    0    .5    0    LB1 "Pl.G[Buc-  
    M    0    1    A    P    FLUX    0    0    .3    0    LB1 tQE<'94A  
    GSO 0 1 10 P                ! Control the output ray OPD over an SFAN of 5 rays. GSR 0 50 10 P  PckAL  
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    END                            ! End of merit function definition. zmFS]IOv$  
    SNAP M^
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    SYNO 40

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    CHG d%:J-UtG"  
    CFIX P6A##
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    1 TH 0 lE$(*1H  
    END CYYo+5x  
    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)  mY]o_\`