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。 >A5R  
处理办法： M$~3`n*^  
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。 f uQbDb&  
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。 (+68s9XS7  
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。 Ni#!C:q  
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 <nlZ?~
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    WA1 .6328                 ! Single wavelength 11[[HkX@  
    UNI MM                     ! Lens is in millimeters usH9dys,  
    OBG .35 2                 ! Gaussian object; waist radius -.35 mm; define full aperture as 2 * 1/e**2 point. gyj.M`+y  
    1    TH 22                 ! Surface 2 is 22 mm from the waist. T]-yTsto  
    2    RD -5 TH 2 GTB S     ! Guess some reasonable lens parameters; use glass type SF6 from Schott catalog SF6 qYR $
5  
    3    UMC 0.3 YMT 5         ! Solve for the curvature of surface 3 so the marginal ray has an angle of 0.3 wwrP7T+d  
                             ! find spacing so ray height is 5 mm on next surface Zu`; S#Y  
    4    RD 20 TH 4 PIN 2     ! Guesses for surface 4 D9,609w  
    5    UMC 0 TH 50             ! Solve for curvature of 5 so beam is collimated. 'KB\K)cD=3  
    7                         ! Surfaces 6 and 7 exist |z\5Ik!fF]  
    AFOCAL                     ! because they are required for AFOCAL output. 'kb5pl~U  
    END                         ! End of lens input file.

(MhC83|?  
    FLUX 100 P 3

b&[9m\AX`  
    DD: DO MACRO FOR AIP = -1 TO 1 '{dduHo  
    COMPOSITE                    ! Ready a composite definition. =y-L'z&r  
    CD1 P FLUX 0 0 AIP 0 3        ! Composite data number 1 is the flux at a relative Y- coordinate of AIP yTzP{
I  
                                ! (defined later) on surface 3. 5OeTOI()&5  
    = CD1 J!5BH2bg  
    Z1 = FILE 1 KiY
O,nD;\  
    = 1 + Z1 1{l18B`  
    ORD = FILE 1

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    CHG NOP rt">xVl  
    9 UMC END PN9^ sLx=  
vzV,} S*c  
    PANT                        ! Start of variable parameter definitions. VLIST RAD ALL    ! Vary all radii. /~3~Xc~=p  
    VLIST TH 3 5 6 7 8            ! Vary the airspaces and two thicknesses (so AEC works on those elements). END :VwU2  
} 8ZCWmd  
    AANT                        ! Start of merit function definition AEC 0\v98g<[+  
    ACC HUqG)t*c1  
    LUL 100 1 1 A TOTL            ! Prevent the system from growing too large; assign upper-limit of 150 on TOTL. pRI<L'  
    M 5 10 A P YA 0 0 1 0 9            ! Ask for a beam radius of 5 mm on surfaces 9 and 10 }L Q9db1  
    M 5 10 A P YA 0 0 1 0 10 RtVy^~=G  
    M 0 1 A P FLUX 0 0 1 0 10   ! Ask for a flux falloff of zero at several zones on 10
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    M    0    1    A    P    FLUX    0    0    .98        0    10 HT]W2^k  
    M    0    1    A    P    FLUX    0    0    .97        0    10 m|q?g
X9R  
    M    0    1    A    P    FLUX    0    0    .96        0    10 H.-jBFt}  
    M    0    1    A    P    FLUX    0    0    .95        0    10 Z$qFjWp  
    M    0    1    A    P    FLUX    0    0    .94        0    10 HScj  
    M    0    1    A    P    FLUX    0    0    .93        0    10 d"3S[_U  
    M    0    1    A    P    FLUX    0    0    .92        0    10 [h
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    M    0    1    A    P    FLUX    0    0    .91        0    10 E)==!T@E  
    M    0    1    A    P    FLUX    0    0    .85        0    10 GC?X>AC:  
    M    0    1    A    P    FLUX    0    0    .8    0        10 )|;*[S4  
    M    0    1    A    P    FLUX    0    0    .7    0        10 OLXkiesK{  
    M    0    1    A    P    FLUX    0    0    .5    0        10 &8'.Gwm}  
    M    0    1    A    P    FLUX    0    0    .3    0        10 ?^Sk17G  
    GSO 0 1 5 P                    ! Control the output ray OPD over an SFAN of 5 rays. C${{&$&  
    END                            ! End of merit function definition. y,qP$5xiq  
    SNAP 5dffFe  
    SYNO 100

qW]gp7jK4  
    CHG NOP p:M#F:  
    13 UMC END U3r[ysf  
+EJwWDJ!%  
    PANT                        ! Start of variable parameter definitions. Hw"ik6  
    VLIST RAD ALL                ! Vary all radii. Z09FW>"u  
    VLIST TH ALL mhnjYK9  
    END =PHl|^  
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    AANT                        ! Start of merit function definition AEC VM{`CJ2  
    ACC u2HkAPhD  
    LUL 100 1 1 A TOTL            ! Prevent the system from growing too large @rs(`4QEh  
    M 5 10 A P YA 0 0 1 0 LB1   ! Ask for a beam radius of 5 mm on surfaces 9 and 10 #.O,JG#H  
    M 5 10 A P YA 0 0 1 0 LB2 SNP.n))   
    M    0    1    A    P    FLUX    0    0    1 0    1    0       ! Ask for a flux falloff of zero at several zones r\]yq-_  
    M    0    1    A    P    FLUX    0    0    .98    0    LB1 Oq"(oNG@  
    M    0    1    A    P    FLUX    0    0    .97    0    LB1 ps0wN%tA  
    M    0    1    A    P    FLUX    0    0    .96    0    LB1 +3.Ik,Z}zq  
    M    0    1    A    P    FLUX    0    0    .95    0    LB1 Ore$yI}!m  
    M    0    1    A    P    FLUX    0    0    .94    0    LB1 I(BG%CO9  
    M    0    1    A    P    FLUX    0    0    .93    0    LB1 @C)O[&Sk  
    M    0    1    A    P    FLUX    0    0    .92    0    LB1 'B}pIx6k~  
    M    0    1    A    P    FLUX    0    0    .91    0    LB1 ~XGO^P"?  
    M    0    1    A    P    FLUX    0    0    .85    0    LB1 jB }O6u[%  
    M    0    1    A    P    FLUX    0    0    .8    0    LB1 7t-j2 n`<  
    M    0    1    A    P    FLUX    0    0    .7    0    LB1 {9TWPB/>  
    M    0    1    A    P    FLUX    0    0    .5    0    LB1 MhC74G  
    M    0    1    A    P    FLUX    0    0    .3    0    LB1 Lm+!/e  
    GSO 0 1 10 P                ! Control the output ray OPD over an SFAN of 5 rays. GSR 0 50 10 P HE&,?vioy  
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    END                            ! End of merit function definition. ;SQ<^"eK  
    SNAP C%d 4ItB >  
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    SYNO 40

1!/+~J[#  
    CHG w?ssV  
    CFIX 9[DQ[bL  
    1 TH 0 Bc}<B:q%b  
    END G],+?E_,  
    DPROP P 0 0 13 SURF 3 R    RESAMPLE