球面激光光束整形器：SYNOPSYS 光学设计软件

6s&%~6J,  
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。 FQikFy(YY  
处理办法： l1}HJmom
 
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。 sTFRu  
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。 \oAxmvt  
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。 RQd5Q.  
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 \ dZD2e4  
    WA1 .6328                 ! Single wavelength ?1/wl;=fm  
    UNI MM                     ! Lens is in millimeters OEj%cB!  
    OBG .35 2                 ! Gaussian object; waist radius -.35 mm; define full aperture as 2 * 1/e**2 point. 9rQw~B<S  
    1    TH 22                 ! Surface 2 is 22 mm from the waist. S
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    2    RD -5 TH 2 GTB S     ! Guess some reasonable lens parameters; use glass type SF6 from Schott catalog SF6 FLOSdMYdw  
    3    UMC 0.3 YMT 5         ! Solve for the curvature of surface 3 so the marginal ray has an angle of 0.3 ~(d#T|ez  
                             ! find spacing so ray height is 5 mm on next surface #6qLu  
    4    RD 20 TH 4 PIN 2     ! Guesses for surface 4 Ih5F\eM  
    5    UMC 0 TH 50             ! Solve for curvature of 5 so beam is collimated. o`ijdg!5qG  
    7                         ! Surfaces 6 and 7 exist >tVD[wVF0  
    AFOCAL                     ! because they are required for AFOCAL output. N+0`Jm  
    END                         ! End of lens input file.

 9/R<,  
    FLUX 100 P 3

,#QLc  
    DD: DO MACRO FOR AIP = -1 TO 1 nV+]jQ~o  
    COMPOSITE                    ! Ready a composite definition. nXcOFU  
    CD1 P FLUX 0 0 AIP 0 3        ! Composite data number 1 is the flux at a relative Y- coordinate of AIP tz"zQC$  
                                ! (defined later) on surface 3.
5nJmabw3  
    = CD1 \
l9S5%L9  
    Z1 = FILE 1 Fwv(J_'q  
    = 1 + Z1 vd!|k5t[d  
    ORD = FILE 1

~g[<A?0=y  
    CHG NOP b".e6zev  
    9 UMC END 6t(I.>-  
ykbTWp$Y4Z  
    PANT                        ! Start of variable parameter definitions. VLIST RAD ALL    ! Vary all radii. fA>FU/r  
    VLIST TH 3 5 6 7 8            ! Vary the airspaces and two thicknesses (so AEC works on those elements). END wth*H$iF  
=jN9PzLk  
    AANT                        ! Start of merit function definition AEC
qCaM]Y  
    ACC X6g{qzHg_  
    LUL 100 1 1 A TOTL            ! Prevent the system from growing too large; assign upper-limit of 150 on TOTL. q-)Ynp4'  
    M 5 10 A P YA 0 0 1 0 9            ! Ask for a beam radius of 5 mm on surfaces 9 and 10 51lN,VVD  
    M 5 10 A P YA 0 0 1 0 10 *yxn*B_xZ  
    M 0 1 A P FLUX 0 0 1 0 10   ! Ask for a flux falloff of zero at several zones on 10 49m}~J=*  
    M    0    1    A    P    FLUX    0    0    .98        0    10 e+=P)Zp/  
    M    0    1    A    P    FLUX    0    0    .97        0    10 SYsbe
5j  
    M    0    1    A    P    FLUX    0    0    .96        0    10 E\!<=  
    M    0    1    A    P    FLUX    0    0    .95        0    10 P<WCW3!JZ  
    M    0    1    A    P    FLUX    0    0    .94        0    10 RRH[$jk  
    M    0    1    A    P    FLUX    0    0    .93        0    10 zU$S#4/C  
    M    0    1    A    P    FLUX    0    0    .92        0    10 d*{NAq'9X  
    M    0    1    A    P    FLUX    0    0    .91        0    10 F ak"u'~  
    M    0    1    A    P    FLUX    0    0    .85        0    10 YZH&KGY  
    M    0    1    A    P    FLUX    0    0    .8    0        10 8hx 3pv
mk  
    M    0    1    A    P    FLUX    0    0    .7    0        10 %+,7=Wt-  
    M    0    1    A    P    FLUX    0    0    .5    0        10 BCtm05  
    M    0    1    A    P    FLUX    0    0    .3    0        10 zU1[+JJY"{  
    GSO 0 1 5 P                    ! Control the output ray OPD over an SFAN of 5 rays. Hkck=@>8H*  
    END                            ! End of merit function definition. {a `#O9  
    SNAP S=bdue  
    SYNO 100

ZdP2}w  
    CHG NOP [Q=NGHB1/  
    13 UMC END .%rB-vO:g  
)ZA3m_w]  
    PANT                        ! Start of variable parameter definitions. f4TNy^-  
    VLIST RAD ALL                ! Vary all radii. +bbhm0f  
    VLIST TH ALL 6GZzNhz  
    END Jm l4EW7  
tL!R^Tf  
    AANT                        ! Start of merit function definition AEC aF~ 0\XC  
    ACC },G>+ s8h  
    LUL 100 1 1 A TOTL            ! Prevent the system from growing too large p+F{iMC  
    M 5 10 A P YA 0 0 1 0 LB1   ! Ask for a beam radius of 5 mm on surfaces 9 and 10 =U_WrY<F  
    M 5 10 A P YA 0 0 1 0 LB2 9(PQ7}  
    M    0    1    A    P    FLUX    0    0    1 0    1    0       ! Ask for a flux falloff of zero at several zones s$s]D\N  
    M    0    1    A    P    FLUX    0    0    .98    0    LB1 (gn)<JJS}  
    M    0    1    A    P    FLUX    0    0    .97    0    LB1 !h "6h  
    M    0    1    A    P    FLUX    0    0    .96    0    LB1 8"\g?/  
    M    0    1    A    P    FLUX    0    0    .95    0    LB1 RI q9wD}4(  
    M    0    1    A    P    FLUX    0    0    .94    0    LB1 85Hb~|0  
    M    0    1    A    P    FLUX    0    0    .93    0    LB1 .Y"H{|]Mnh  
    M    0    1    A    P    FLUX    0    0    .92    0    LB1 ^Cs5A0xo#s  
    M    0    1    A    P    FLUX    0    0    .91    0    LB1  OEN!~-u  
    M    0    1    A    P    FLUX    0    0    .85    0    LB1 ; iK9'u  
    M    0    1    A    P    FLUX    0    0    .8    0    LB1 :i4>&4j  
    M    0    1    A    P    FLUX    0    0    .7    0    LB1 HJn  
    M    0    1    A    P    FLUX    0    0    .5    0    LB1 3 oG5E"G  
    M    0    1    A    P    FLUX    0    0    .3    0    LB1 O#e'.n!rI  
    GSO 0 1 10 P                ! Control the output ray OPD over an SFAN of 5 rays. GSR 0 50 10 P <opBOZ d  
W\tSXM-Hg  
    END                            ! End of merit function definition. ]i3 1@O  
    SNAP x[,HK{U|t  
<3;Sq~^  
    SYNO 40

W+&w'~M  
    CHG [_&\wHX  
    CFIX S9$*w!W  
    1 TH 0 Z>)(yi9+  
    END 26c,hPIeXY  
    DPROP P 0 0 13 SURF 3 R    RESAMPLE