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。 #'lqE)T  
处理办法： ~+OAAkJ9  
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。 ZA{T0:  
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。 C0v1x=(xiM  
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。 Ap)[;_9BD  
这是我们输入的初始结构：

jSc!"Trl]  
    RLE                         ! Beginning of lens input file. ID LASER BEAM SHAPER uW4wTAk;qh  
    WA1 .6328                 ! Single wavelength GX-V|hLaGX  
    UNI MM                     ! Lens is in millimeters _jCk)3KO  
    OBG .35 2                 ! Gaussian object; waist radius -.35 mm; define full aperture as 2 * 1/e**2 point. \!Cc[n(f#  
    1    TH 22                 ! Surface 2 is 22 mm from the waist. *47',Qy  
    2    RD -5 TH 2 GTB S     ! Guess some reasonable lens parameters; use glass type SF6 from Schott catalog SF6 @eOD+h'  
    3    UMC 0.3 YMT 5         ! Solve for the curvature of surface 3 so the marginal ray has an angle of 0.3 i0/RvrLc  
                             ! find spacing so ray height is 5 mm on next surface pN?geF~t|  
    4    RD 20 TH 4 PIN 2     ! Guesses for surface 4 7>,(QHl
 
    5    UMC 0 TH 50             ! Solve for curvature of 5 so beam is collimated. 14Y<-OO: k  
    7                         ! Surfaces 6 and 7 exist 9hn+eU  
    AFOCAL                     ! because they are required for AFOCAL output. pB0p?D)n  
    END                         ! End of lens input file.

Y5,[udF:O  
    FLUX 100 P 3

J,SP1-L  
    DD: DO MACRO FOR AIP = -1 TO 1 )oAxt70  
    COMPOSITE                    ! Ready a composite definition. YkuFt>U9,  
    CD1 P FLUX 0 0 AIP 0 3        ! Composite data number 1 is the flux at a relative Y- coordinate of AIP 2uZ4$_  
                                ! (defined later) on surface 3. 56`Tna,t  
    = CD1 qr<RMs  
    Z1 = FILE 1 0+
dc  
    = 1 + Z1 R!Lh~~@{(  
    ORD = FILE 1

 ,7h0y  
    CHG NOP j/p1/sJ[y  
    9 UMC END xNOArb5e5  
+oevNM  
    PANT                        ! Start of variable parameter definitions. VLIST RAD ALL    ! Vary all radii. QCAoL.v  
    VLIST TH 3 5 6 7 8            ! Vary the airspaces and two thicknesses (so AEC works on those elements). END (J 1:J  
N}gPf i  
    AANT                        ! Start of merit function definition AEC PrqyJ  
    ACC (|9t+KP  
    LUL 100 1 1 A TOTL            ! Prevent the system from growing too large; assign upper-limit of 150 on TOTL. /N9ct4 {^  
    M 5 10 A P YA 0 0 1 0 9            ! Ask for a beam radius of 5 mm on surfaces 9 and 10 m"/ o4  
    M 5 10 A P YA 0 0 1 0 10 Rl{e<>O\^  
    M 0 1 A P FLUX 0 0 1 0 10   ! Ask for a flux falloff of zero at several zones on 10 <q.Q,_cW  
    M    0    1    A    P    FLUX    0    0    .98        0    10 N@#,YnPI  
    M    0    1    A    P    FLUX    0    0    .97        0    10 '4ip~>3?w  
    M    0    1    A    P    FLUX    0    0    .96        0    10 W+Q^u7K  
    M    0    1    A    P    FLUX    0    0    .95        0    10 %urd;h
D  
    M    0    1    A    P    FLUX    0    0    .94        0    10 rt0_[i  
    M    0    1    A    P    FLUX    0    0    .93        0    10  <BiSx  
    M    0    1    A    P    FLUX    0    0    .92        0    10 \k 6'[ln  
    M    0    1    A    P    FLUX    0    0    .91        0    10 U!i1~)s  
    M    0    1    A    P    FLUX    0    0    .85        0    10 363KU@`  
    M    0    1    A    P    FLUX    0    0    .8    0        10 *$Z,kZ^^  
    M    0    1    A    P    FLUX    0    0    .7    0        10 .]w=+~h  
    M    0    1    A    P    FLUX    0    0    .5    0        10 .+(R,SvN%<  
    M    0    1    A    P    FLUX    0    0    .3    0        10 1I?`3N  
    GSO 0 1 5 P                    ! Control the output ray OPD over an SFAN of 5 rays. Jo''yrJpB  
    END                            ! End of merit function definition. RJ1@a  
    SNAP |/;;uK,y  
    SYNO 100

l;d4Le  
    CHG NOP M}e}3w  
    13 UMC END N*+L'bO  
\`;1[m  
    PANT                        ! Start of variable parameter definitions. Rt>mAU$}  
    VLIST RAD ALL                ! Vary all radii. k+BY3a  
    VLIST TH ALL *,|x p  
    END GL%)s?   
)FN\jo!!.  
    AANT                        ! Start of merit function definition AEC 9ZNzC i!  
    ACC ot0g@q[3  
    LUL 100 1 1 A TOTL            ! Prevent the system from growing too large lVCnu>8  
    M 5 10 A P YA 0 0 1 0 LB1   ! Ask for a beam radius of 5 mm on surfaces 9 and 10 q|V|Jl  
    M 5 10 A P YA 0 0 1 0 LB2 UD=[::##  
    M    0    1    A    P    FLUX    0    0    1 0    1    0       ! Ask for a flux falloff of zero at several zones jO-T1P']Y  
    M    0    1    A    P    FLUX    0    0    .98    0    LB1 C8W_f( i~  
    M    0    1    A    P    FLUX    0    0    .97    0    LB1 vmg[/#  
    M    0    1    A    P    FLUX    0    0    .96    0    LB1 "U!Vdt2vp  
    M    0    1    A    P    FLUX    0    0    .95    0    LB1 8<Pi}RH  
    M    0    1    A    P    FLUX    0    0    .94    0    LB1 Rl&nR$#  
    M    0    1    A    P    FLUX    0    0    .93    0    LB1 zZ,"HY=jN  
    M    0    1    A    P    FLUX    0    0    .92    0    LB1 CG;+Z-"X  
    M    0    1    A    P    FLUX    0    0    .91    0    LB1 &NOCRabc  
    M    0    1    A    P    FLUX    0    0    .85    0    LB1 ZUD{V  
    M    0    1    A    P    FLUX    0    0    .8    0    LB1 z\"9T?zoo  
    M    0    1    A    P    FLUX    0    0    .7    0    LB1 $_3)m  
    M    0    1    A    P    FLUX    0    0    .5    0    LB1 +p[O|[z  
    M    0    1    A    P    FLUX    0    0    .3    0    LB1 a6@k*9D>  
    GSO 0 1 10 P                ! Control the output ray OPD over an SFAN of 5 rays. GSR 0 50 10 P Cp+tcrd_s  
|ZC'a!  
    END                            ! End of merit function definition. z%BX^b$Hj  
    SNAP Jd~Mq9(  
k!bG![Ie|  
    SYNO 40

5{WvV%  
    CHG 8H1&=)M=  
    CFIX \GV'{W+o2  
    1 TH 0 }u8g7Nj  
    END B`gH({U  
    DPROP P 0 0 13 SURF 3 R    RESAMPLE