球面激光光束整形器：SYNOPSYS 光学设计软件

Tx!
c}  
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。 H;nq4;^yK  
处理办法： +w'{I`QIL0  
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。 JJe?Zu\  
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。 "Ca?liy  
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。 2(Ez H  
这是我们输入的初始结构：

KXy|Si8w  
    RLE                         ! Beginning of lens input file. ID LASER BEAM SHAPER P0N%77p>"  
    WA1 .6328                 ! Single wavelength //\UthOT  
    UNI MM                     ! Lens is in millimeters ;q6FdS  
    OBG .35 2                 ! Gaussian object; waist radius -.35 mm; define full aperture as 2 * 1/e**2 point. %}%vey  
    1    TH 22                 ! Surface 2 is 22 mm from the waist. cr_Q,
*  
    2    RD -5 TH 2 GTB S     ! Guess some reasonable lens parameters; use glass type SF6 from Schott catalog SF6 -A A='s  
    3    UMC 0.3 YMT 5         ! Solve for the curvature of surface 3 so the marginal ray has an angle of 0.3 F6xQ`T|  
                             ! find spacing so ray height is 5 mm on next surface /92m5p  
    4    RD 20 TH 4 PIN 2     ! Guesses for surface 4 beM}({:`  
    5    UMC 0 TH 50             ! Solve for curvature of 5 so beam is collimated. <O#/-r>2  
    7                         ! Surfaces 6 and 7 exist wt@q+9:  
    AFOCAL                     ! because they are required for AFOCAL output. wZV/]jmlEt  
    END                         ! End of lens input file.

D; 0iNcit  
    FLUX 100 P 3

fy`e)?46  
    DD: DO MACRO FOR AIP = -1 TO 1 tE: m& ;I  
    COMPOSITE                    ! Ready a composite definition. UEvRK?mm=  
    CD1 P FLUX 0 0 AIP 0 3        ! Composite data number 1 is the flux at a relative Y- coordinate of AIP b6k'`vLA  
                                ! (defined later) on surface 3. 6jRUkI-!  
    = CD1 <Eo;CaaF/  
    Z1 = FILE 1 8R6!SB  
    = 1 + Z1 D%0GXUp  
    ORD = FILE 1

8-?.Q"D7%  
    CHG NOP
lglC1W-q  
    9 UMC END 8/;q~:v  
.]qj];m  
    PANT                        ! Start of variable parameter definitions. VLIST RAD ALL    ! Vary all radii. Q`qHzb~%  
    VLIST TH 3 5 6 7 8            ! Vary the airspaces and two thicknesses (so AEC works on those elements). END
@}K'Ic  
A3p@hQl  
    AANT                        ! Start of merit function definition AEC l)glT]G3+  
    ACC dooS
|Mq  
    LUL 100 1 1 A TOTL            ! Prevent the system from growing too large; assign upper-limit of 150 on TOTL. 0@y
HT-Dy  
    M 5 10 A P YA 0 0 1 0 9            ! Ask for a beam radius of 5 mm on surfaces 9 and 10 8"4&IX  
    M 5 10 A P YA 0 0 1 0 10 n# %mL<  
    M 0 1 A P FLUX 0 0 1 0 10   ! Ask for a flux falloff of zero at several zones on 10 h7NS9CgO  
    M    0    1    A    P    FLUX    0    0    .98        0    10 gc 14%  
    M    0    1    A    P    FLUX    0    0    .97        0    10 Zu\(XN?62  
    M    0    1    A    P    FLUX    0    0    .96        0    10 x?:[:Hf   
    M    0    1    A    P    FLUX    0    0    .95        0    10 ,c@^u6a  
    M    0    1    A    P    FLUX    0    0    .94        0    10 {q%wr*  
    M    0    1    A    P    FLUX    0    0    .93        0    10 ISI\<qx  
    M    0    1    A    P    FLUX    0    0    .92        0    10 8I)66  
    M    0    1    A    P    FLUX    0    0    .91        0    10 `/:ZB6  
    M    0    1    A    P    FLUX    0    0    .85        0    10 k[]B P4  
    M    0    1    A    P    FLUX    0    0    .8    0        10 $!L'ZO1_r  
    M    0    1    A    P    FLUX    0    0    .7    0        10 fQ5VRpWGn  
    M    0    1    A    P    FLUX    0    0    .5    0        10 O+Fu zCWj  
    M    0    1    A    P    FLUX    0    0    .3    0        10 {$,e@nn  
    GSO 0 1 5 P                    ! Control the output ray OPD over an SFAN of 5 rays. ]A:n]mL  
    END                            ! End of merit function definition. /R&!92I0*  
    SNAP A@BYd'}]  
    SYNO 100

tr6<89e(o  
    CHG NOP
)UA};Fus  
    13 UMC END &13qlc6  
-t_t3aU|  
    PANT                        ! Start of variable parameter definitions. =7@N'xX  
    VLIST RAD ALL                ! Vary all radii. cXiNO ke&  
    VLIST TH ALL eXY*l>B  
    END ;Bk?,g  
7F OG^  
    AANT                        ! Start of merit function definition AEC XBE+O7  
    ACC ;0ap#6T  
    LUL 100 1 1 A TOTL            ! Prevent the system from growing too large q~
68)D(  
    M 5 10 A P YA 0 0 1 0 LB1   ! Ask for a beam radius of 5 mm on surfaces 9 and 10 ?El8:zt?|  
    M 5 10 A P YA 0 0 1 0 LB2 g5X;]%:  
    M    0    1    A    P    FLUX    0    0    1 0    1    0       ! Ask for a flux falloff of zero at several zones 5qzFH,  
    M    0    1    A    P    FLUX    0    0    .98    0    LB1 /EF0~iy  
    M    0    1    A    P    FLUX    0    0    .97    0    LB1 duCxYhh|  
    M    0    1    A    P    FLUX    0    0    .96    0    LB1 45` i  
    M    0    1    A    P    FLUX    0    0    .95    0    LB1 j^#4!Ue  
    M    0    1    A    P    FLUX    0    0    .94    0    LB1 DD`Bl1)  
    M    0    1    A    P    FLUX    0    0    .93    0    LB1 n,hl6[OL7  
    M    0    1    A    P    FLUX    0    0    .92    0    LB1 InnjZ>$  
    M    0    1    A    P    FLUX    0    0    .91    0    LB1 k%|7H,7  
    M    0    1    A    P    FLUX    0    0    .85    0    LB1 TbqH-R3W  
    M    0    1    A    P    FLUX    0    0    .8    0    LB1 f8yE>qJP  
    M    0    1    A    P    FLUX    0    0    .7    0    LB1 RKoM49W  
    M    0    1    A    P    FLUX    0    0    .5    0    LB1 o!W 71  
    M    0    1    A    P    FLUX    0    0    .3    0    LB1 (jbHV.]P9  
    GSO 0 1 10 P                ! Control the output ray OPD over an SFAN of 5 rays. GSR 0 50 10 P u;f${Wn'3  
c5x2FM z  
    END                            ! End of merit function definition. wVU.j$+_#  
    SNAP $VOSd<87  
|[apLQ6  
    SYNO 40

I`k%/ei38  
    CHG }LK +w+h~  
    CFIX !'|^`u=eL  
    1 TH 0 P2la/jN  
    END H_w&_h&  
    DPROP P 0 0 13 SURF 3 R    RESAMPLE