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。 @<D'-mMt  
处理办法： {cR_?Y@  
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。 =vqsd4  
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。 T-a&e9B  
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。 ku/\16E/k  
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 BIxV|\k  
    WA1 .6328                 ! Single wavelength Rk($lW)  
    UNI MM                     ! Lens is in millimeters f >mhFy  
    OBG .35 2                 ! Gaussian object; waist radius -.35 mm; define full aperture as 2 * 1/e**2 point. ,|T*|2Gm  
    1    TH 22                 ! Surface 2 is 22 mm from the waist. jo9J%vo  
    2    RD -5 TH 2 GTB S     ! Guess some reasonable lens parameters; use glass type SF6 from Schott catalog SF6 &mN'Tk  
    3    UMC 0.3 YMT 5         ! Solve for the curvature of surface 3 so the marginal ray has an angle of 0.3 VHXI@UT*  
                             ! find spacing so ray height is 5 mm on next surface A Gv!c($  
    4    RD 20 TH 4 PIN 2     ! Guesses for surface 4 V";mWws+?#  
    5    UMC 0 TH 50             ! Solve for curvature of 5 so beam is collimated. Pm$F2YrO3  
    7                         ! Surfaces 6 and 7 exist
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    AFOCAL                     ! because they are required for AFOCAL output. 2[jL^XMM  
    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 X AQGG>  
    COMPOSITE                    ! Ready a composite definition. d{er|$E?  
    CD1 P FLUX 0 0 AIP 0 3        ! Composite data number 1 is the flux at a relative Y- coordinate of AIP CQ@LmTW[  
                                ! (defined later) on surface 3. p86~~rvq[  
    = CD1 h/,R{A2mO  
    Z1 = FILE 1 QB!jLlg(  
    = 1 + Z1 -glugVq  
    ORD = FILE 1

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    CHG NOP M|d={o9Hp  
    9 UMC END t{!/#eQC  
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    PANT                        ! Start of variable parameter definitions. VLIST RAD ALL    ! Vary all radii. f0vJm  
    VLIST TH 3 5 6 7 8            ! Vary the airspaces and two thicknesses (so AEC works on those elements). END M&r2:Whk  
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    AANT                        ! Start of merit function definition AEC tE@FvZC'=  
    ACC 5L F/5`  
    LUL 100 1 1 A TOTL            ! Prevent the system from growing too large; assign upper-limit of 150 on TOTL.
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    M 5 10 A P YA 0 0 1 0 9            ! Ask for a beam radius of 5 mm on surfaces 9 and 10 9z:K1  
    M 5 10 A P YA 0 0 1 0 10 98GlhogWt  
    M 0 1 A P FLUX 0 0 1 0 10   ! Ask for a flux falloff of zero at several zones on 10 %;7.9%  
    M    0    1    A    P    FLUX    0    0    .98        0    10 GD!- 
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    M    0    1    A    P    FLUX    0    0    .97        0    10 1pK6=-3w3  
    M    0    1    A    P    FLUX    0    0    .96        0    10 xOythvO  
    M    0    1    A    P    FLUX    0    0    .95        0    10 ;J]25j]]  
    M    0    1    A    P    FLUX    0    0    .94        0    10 %Uy%kN_&  
    M    0    1    A    P    FLUX    0    0    .93        0    10 %,/lqcFo  
    M    0    1    A    P    FLUX    0    0    .92        0    10 (?vK_{  
    M    0    1    A    P    FLUX    0    0    .91        0    10 KF+mZB  
    M    0    1    A    P    FLUX    0    0    .85        0    10 >L gVj$Z  
    M    0    1    A    P    FLUX    0    0    .8    0        10 {Bh("wg$Lk  
    M    0    1    A    P    FLUX    0    0    .7    0        10
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    M    0    1    A    P    FLUX    0    0    .5    0        10 I.1D*!tz  
    M    0    1    A    P    FLUX    0    0    .3    0        10 !siWEzw  
    GSO 0 1 5 P                    ! Control the output ray OPD over an SFAN of 5 rays. {6h|6.S2  
    END                            ! End of merit function definition. .oEbEs  
    SNAP 1_uvoFLk  
    SYNO 100

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    CHG NOP 9cG<hX9`F  
    13 UMC END ^ q?1U?4  
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    PANT                        ! Start of variable parameter definitions. @E%DP9.I  
    VLIST RAD ALL                ! Vary all radii. jZd}OC<  
    VLIST TH ALL uFG<UF  
    END bAEg$A  
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    AANT                        ! Start of merit function definition AEC ?,)"~c$hZ  
    ACC o5!f#Y  
    LUL 100 1 1 A TOTL            ! Prevent the system from growing too large jnJZ#=)  
    M 5 10 A P YA 0 0 1 0 LB1   ! Ask for a beam radius of 5 mm on surfaces 9 and 10 wfR&li{  
    M 5 10 A P YA 0 0 1 0 LB2 $i#?v  
    M    0    1    A    P    FLUX    0    0    1 0    1    0       ! Ask for a flux falloff of zero at several zones 6S1m<aH6  
    M    0    1    A    P    FLUX    0    0    .98    0    LB1 /7/0x ./{  
    M    0    1    A    P    FLUX    0    0    .97    0    LB1 }Cj8  
    M    0    1    A    P    FLUX    0    0    .96    0    LB1 6o=G8y  
    M    0    1    A    P    FLUX    0    0    .95    0    LB1 wvN
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    M    0    1    A    P    FLUX    0    0    .94    0    LB1 I[d]!YI}F  
    M    0    1    A    P    FLUX    0    0    .93    0    LB1 QM'X@  
    M    0    1    A    P    FLUX    0    0    .92    0    LB1  |yKud  
    M    0    1    A    P    FLUX    0    0    .91    0    LB1 ;b0NGa(k  
    M    0    1    A    P    FLUX    0    0    .85    0    LB1 I4t*?  
    M    0    1    A    P    FLUX    0    0    .8    0    LB1 `s"d]/85VW  
    M    0    1    A    P    FLUX    0    0    .7    0    LB1 V5p0h~PK  
    M    0    1    A    P    FLUX    0    0    .5    0    LB1 |^a;77nE_^  
    M    0    1    A    P    FLUX    0    0    .3    0    LB1 Fky?\ec  
    GSO 0 1 10 P                ! Control the output ray OPD over an SFAN of 5 rays. GSR 0 50 10 P 5MF#&v  
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    END                            ! End of merit function definition. !L$x:/R9M  
    SNAP 5l{Ts04k%  
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    SYNO 40

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    CHG 6'vbT~S!  
    CFIX [?0d~Q(R#  
    1 TH 0 !t#F/C  
    END g)"gw+ZFc  
    DPROP P 0 0 13 SURF 3 R    RESAMPLE