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。 iq25|{1$  
处理办法： |qn`z-  
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。 ({R-JkW:;  
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。 o|tq&&! <  
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。 d~G, *  
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 F7FUoew<  
    WA1 .6328                 ! Single wavelength 86bRfW'  
    UNI MM                     ! Lens is in millimeters X\z`S##kj  
    OBG .35 2                 ! Gaussian object; waist radius -.35 mm; define full aperture as 2 * 1/e**2 point. #[Z1W8e  
    1    TH 22                 ! Surface 2 is 22 mm from the waist. !mM`+XH  
    2    RD -5 TH 2 GTB S     ! Guess some reasonable lens parameters; use glass type SF6 from Schott catalog SF6 8RA]h?$$J  
    3    UMC 0.3 YMT 5         ! Solve for the curvature of surface 3 so the marginal ray has an angle of 0.3 q{fgsc8v\  
                             ! find spacing so ray height is 5 mm on next surface jGeil qPC  
    4    RD 20 TH 4 PIN 2     ! Guesses for surface 4 oCCTRLb02  
    5    UMC 0 TH 50             ! Solve for curvature of 5 so beam is collimated. \),DW)  
    7                         ! Surfaces 6 and 7 exist (O&R-5m  
    AFOCAL                     ! because they are required for AFOCAL output. 0wh4
sKm[X  
    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 by:"aDGK.  
    COMPOSITE                    ! Ready a composite definition. o'Uaz*-po  
    CD1 P FLUX 0 0 AIP 0 3        ! Composite data number 1 is the flux at a relative Y- coordinate of AIP ~6<'cun@x  
                                ! (defined later) on surface 3. <hJ%]]  
    = CD1 Q^B !^_M  
    Z1 = FILE 1 d,hKy2
 
    = 1 + Z1 Hv>16W$_  
    ORD = FILE 1

LdPA`oI3j  
    CHG NOP 'X$J+s}6&  
    9 UMC END ]ZbZ]  
DJ!<:9FD  
    PANT                        ! Start of variable parameter definitions. VLIST RAD ALL    ! Vary all radii. ++d%D9*V<  
    VLIST TH 3 5 6 7 8            ! Vary the airspaces and two thicknesses (so AEC works on those elements). END .$rt>u,8<  
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    AANT                        ! Start of merit function definition AEC 4GL-3e  
    ACC M%vZcP  
    LUL 100 1 1 A TOTL            ! Prevent the system from growing too large; assign upper-limit of 150 on TOTL. L]syDn  
    M 5 10 A P YA 0 0 1 0 9            ! Ask for a beam radius of 5 mm on surfaces 9 and 10 )~Pj3  
    M 5 10 A P YA 0 0 1 0 10 I?z*.yA*  
    M 0 1 A P FLUX 0 0 1 0 10   ! Ask for a flux falloff of zero at several zones on 10 q_R^Q>ZIe  
    M    0    1    A    P    FLUX    0    0    .98        0    10 C<T)'^7z  
    M    0    1    A    P    FLUX    0    0    .97        0    10 2`]`nTz,  
    M    0    1    A    P    FLUX    0    0    .96        0    10 TA~FP#.  
    M    0    1    A    P    FLUX    0    0    .95        0    10 ZJod=^T  
    M    0    1    A    P    FLUX    0    0    .94        0    10 #C`IfP./  
    M    0    1    A    P    FLUX    0    0    .93        0    10 ,P T5-9 m  
    M    0    1    A    P    FLUX    0    0    .92        0    10 _[kZ:#  
    M    0    1    A    P    FLUX    0    0    .91        0    10 [8Yoz1(smA  
    M    0    1    A    P    FLUX    0    0    .85        0    10 1Fs:&*=  
    M    0    1    A    P    FLUX    0    0    .8    0        10 #\{j/{VZ  
    M    0    1    A    P    FLUX    0    0    .7    0        10 dB=aq34l  
    M    0    1    A    P    FLUX    0    0    .5    0        10 T+q3]&  
    M    0    1    A    P    FLUX    0    0    .3    0        10 }[2|86,G;  
    GSO 0 1 5 P                    ! Control the output ray OPD over an SFAN of 5 rays. "h84D&V  
    END                            ! End of merit function definition. 5>nbA8  
    SNAP 7R{(\s\9:  
    SYNO 100

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    CHG NOP h=7eOK]  
    13 UMC END Cbq|<p# #o  
`;R [*7  
    PANT                        ! Start of variable parameter definitions. vp_$Ft-R  
    VLIST RAD ALL                ! Vary all radii. L*'3f~@Q  
    VLIST TH ALL
Li{R?Osx  
    END jWX^h^
n7K  
G#f(oGn :  
    AANT                        ! Start of merit function definition AEC /yd<+on^  
    ACC l(fStpP  
    LUL 100 1 1 A TOTL            ! Prevent the system from growing too large Qt VZ)777
 
    M 5 10 A P YA 0 0 1 0 LB1   ! Ask for a beam radius of 5 mm on surfaces 9 and 10 KD*q|?Z  
    M 5 10 A P YA 0 0 1 0 LB2 MF}}o0P  
    M    0    1    A    P    FLUX    0    0    1 0    1    0       ! Ask for a flux falloff of zero at several zones mKh<M)Bz  
    M    0    1    A    P    FLUX    0    0    .98    0    LB1 *qN(_  
    M    0    1    A    P    FLUX    0    0    .97    0    LB1 wvuh   
    M    0    1    A    P    FLUX    0    0    .96    0    LB1 wfJ[" q   
    M    0    1    A    P    FLUX    0    0    .95    0    LB1 D,<#pNO_  
    M    0    1    A    P    FLUX    0    0    .94    0    LB1 %CaUC'  
    M    0    1    A    P    FLUX    0    0    .93    0    LB1 J nzI- y  
    M    0    1    A    P    FLUX    0    0    .92    0    LB1 oKlOcws}  
    M    0    1    A    P    FLUX    0    0    .91    0    LB1 eN?:3cP#l  
    M    0    1    A    P    FLUX    0    0    .85    0    LB1 [-pB}1Dxb  
    M    0    1    A    P    FLUX    0    0    .8    0    LB1 5"cYZvGkJ  
    M    0    1    A    P    FLUX    0    0    .7    0    LB1 -y1t;yU.L  
    M    0    1    A    P    FLUX    0    0    .5    0    LB1 a#NP69  
    M    0    1    A    P    FLUX    0    0    .3    0    LB1 LqOjVQxz  
    GSO 0 1 10 P                ! Control the output ray OPD over an SFAN of 5 rays. GSR 0 50 10 P +'{@Xe}  
1 xu2$x.b  
    END                            ! End of merit function definition. mm@)uV<\  
    SNAP FE[{*8  
l*0`{R  
    SYNO 40

rdY/QvP0=  
    CHG zV<vwIUrr  
    CFIX C $r]]MSj  
    1 TH 0 Q x]zz4jD  
    END |x ~<Dc>0*  
    DPROP P 0 0 13 SURF 3 R    RESAMPLE