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    [原创]RP Fiber Power仿真设计掺铥光纤激光器代码详解 [复制链接]

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    离线小火龙果
     
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    只看楼主 倒序阅读 楼主  发表于: 2020-05-28
    (* K^[Dz\ov5  
    Demo for program"RP Fiber Power": thulium-doped fiber laser, zRA,Yi4;+  
    pumped at 790 nm. Across-relaxation process allows for efficient ej]>*n  
    population of theupper laser level. p~<d8n4UH  
    *)            !(*  *)注释语句 _sqV@ J  
    RxGZ#!j/  
    diagram shown: 1,2,3,4,5  !指定输出图表 5J*h7  
    ; 1: "Powersvs. Position"     !分号是注释;光纤长度对功率的影响 +Y440Tz  
    ; 2:"Variation of the Pump Power"  !泵浦光功率变化对信号输出功率的影响 Dp;6CGYl?  
    ; 3:"Variation of the Fiber Length"!信号输出功率vs 光纤长度的变化,仿真最佳光纤长度 l7S&s&W @  
    ; 4:"Transverse Profiles"             !横向分布,横坐标为半径位置 3\?yjL^  
    ; 5:"Transition Cross-sections"    !不同波长的跃迁横截面,横坐标波长,纵坐标为横截面 ]]V| ]}<)m  
    F t;[>o  
    include"Units.inc"         !读取“Units.inc”文件中内容 90 pt'Jg  
    g:[yA{Eh  
    include"Tm-silicate.inc"    !读取光谱数据 =\x(Rs3  
    j.g9O]pi  
    ; Basic fiberparameters:    !定义基本光纤参数 h~.z[  
    L_f := 4 { fiberlength }      !光纤长度 a>)|SfsE  
    No_z_steps := 50 {no steps along the fiber } !光纤步长,大括号{ }是注释,相当于备注 b^&nr[DC  
    r_co := 6 um { coreradius }                !纤芯半径 Kfs|KIQ>=  
    N_Tm := 100e24 { Tmdoping concentration }  !纤芯Tm离子掺杂浓度 ^r^)  &]  
    I :o.%5)  
    ; Parameters of thechannels:                !定义光信道 .Za)S5U  
    l_p := 790 nm {pump wavelength }                !泵浦光波长790nm +r 8/\'u-  
    dir_p := forward {pump direction (forward or backward) }   !前向泵浦 -<@QR8:  
    P_pump_in := 5 {input pump power }                    !输入泵浦功率5W b,-qyJW6  
    w_p := 50 um {radius of pump cladding }               !包层泵浦相应的半径 50um Mzj|57:gx  
    I_p(r) := (r <=w_p) { pump intensity profile }          !泵浦光强度分布 +Am\jsq  
    loss_p := 0 {parasitic losses of pump wave }           !泵浦光寄生损耗为0 %gV~e@|  
    FSkz[D_}  
    l_s := 1940 nm {signal wavelength }                   !信号光波长1940nm YjwC8#$  
    w_s := 7 um                          !信号光的半径 q,2 +\i  
    I_s(r) := exp(-2 *(r / w_s)^2)            !信号光的高斯强度分布 P(~vqo>!  
    loss_s := 0                            !信号光寄生损耗为0 m7.6;k.  
    =LojRY  
    R_oc := 0.70 {output coupler reflectivity (right side) }      !输出耦合反射率 bLyaJ%pa\/  
    gwv s  
    ; Function for defining themodel:   !定义模型函数,一定要有calc命令,否则函数只会被定义,但不会被执行 $g]'$PB  
    calc %j2ZQ/z  
      begin 4xzoA'Mb@  
        global allow all;                   !声明全局变量 |E9iG  
        set_fiber(L_f, No_z_steps, '');        !光纤参数 VgcLG ]tE[  
        add_ring(r_co, N_Tm); vjO@"2YEw  
        def_ionsystem();              !光谱数据函数 (z.eXoP@>  
        pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  !泵浦光信道 okQ<_1e{  
        signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      !前向信号光信道 \[W)[mH_  
        signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    !后向信号光信道 3YJa3fflK  
        set_R(signal_fw, 1, R_oc);                                 !设置反射率函数 |lVoL.Z,0  
        finish_fiber();                                   NKE,}^C  
      end; si`h(VD9w  
    TAKv E=a;  
    ; Display someoutputs in the Output window (on the right side): !在Output aera区域显示输出 o@A|Lm.   
    show "Outputpowers:"                                   !输出字符串Output powers: )~H&YINhn  
    show"pump:     ", P_out(pump):d3:"W"  !输出字符串pump:和计算值(格式为3个有效数字,单位W) 3.<E{E!F  
    show"signal:   ",P_out(signal_fw):d3:"W" !输出字符串signal:和计算值(格式为3个有效数字,单位W) ad,pHJ`  
    b]xE^zM-I`  
    clO9l=g  
    ; ------------- =p 7eP  
    diagram 1:                   !输出图表1 b*W01ist  
    IO}53zn<l  
    "Powers vs.Position"          !图表名称 T6fm`uL&L  
    ])H[>.?K  
    x: 0, L_f                      !命令x: 定义x坐标范围 TjLW<D(i>  
    "position infiber (m)", @x      !x轴标签;@x 指示这些字符串沿坐标轴放置 )lDmYt7me  
    y: 0, 15                      !命令y: 定义y坐标范围 xJ|_R,>.H  
    y2: 0, 100                    !命令y2: 定义第二个y坐标范围 w4(g]9^Q  
    frame          !frame改变坐标系的设置 |%c"Avc  
    legpos 600, 500  !图行在图表窗口中的位置(相对于左上角而言) xdkC>o4>  
    hx             !平行于x方向网格 DRuG5|{I:  
    hy              !平行于y方向网格 xmBGZ4f%  
    P QA}_o  
    f: P(pump, x),    !命令f: 定义函数图;P(pump, x)函数是计算x位置处的泵浦光功率 Gsa~zGN  
      color = red,  !图形颜色 4g^Xe-  
      width = 3,   !width线条宽度 :*dfP/GO  
      "pump"       !相应的文本字符串标签 {bD:OF  
    f: P(signal_fw, x),  !P(signal_fw ,x) 函数是计算x位置处的前向信号光功率 #f-pkeaeq  
      color = blue,     d@e2+3<  
      width = 3, P1IL ]  
      "fw signal" ~3,k8C"pRq  
    f: P(signal_bw, x),   !P(signal_bw ,x) 函数是计算x位置处的后向信号光功率 $Z[W}7{pt#  
      color = blue, 'jj|bN  
      style = fdashed, t?;\'  
      width = 3, [ F7ru4"{  
      "bw signal" $ v0beN6MG  
    }`^D O Ar  
    f: 100 * n(x, 2),    !n(x ,2) 函数是计算x位置处激活粒子数在能级2上的占比 3T84f[CFJ  
      yscale = 2,            !第二个y轴的缩放比例 6&s" "J)3  
      color = magenta, #d;/Me  
      width = 3, /YHAU5N/}  
      style = fdashed, 1%`Nu ]D  
      "n2 (%, right scale)" G7uYkJO  
    O"V;otlC  
    f: 100 * n(x, 3),          !n(x ,3) 函数是计算x位置处激活粒子数在能级3上的占比 o#9 Q   
      yscale = 2, lNba[;_  
      color = red, R8C#D B  
      width = 3, xnvG5  
      style = fdashed, pRH'>}rtuH  
      "n3 (%, right scale)" $~r_&1  
    Ze"m;T  
    i$JN s)I%  
    ; ------------- Y=\:fa  
    diagram 2:                    !输出图表2 ne9- c>>  
    %=`wN^3t2  
    "Variation ofthe Pump Power" GvI8W)d3,R  
    =:;K nS  
    x: 0, 10 H?cJ'Q, 5  
    "pump inputpower (W)", @x #b wGDF  
    y: 0, 10 :b`ywSp`  
    y2: 0, 100 |*n B2  
    frame 2wwJ>iR`  
    hx #6*20w_u  
    hy /_qW?LKG/  
    legpos 150, 150 NE4 }!I  
    9>9,   
    f: (set_P_in(pump, x);P_out(signal_fw)), !set_P_in(pump,x)改变泵浦信道功率;P_out(signal_fw)输出前向信号光 ]8/g[Ii  
      step = 5, 6<mlx'  
      color = blue, vo>i36  
      width = 3, = :BTv[lv  
      "signal output power (W, leftscale)",     !相应的文本字符串标签 L%;[tu(*  
      finish set_P_in(pump, P_pump_in) E{BX $R_8  
    dCpDA a3  
    f: (set_P_in(pump,x); 100 * n_av(2)),   !改变泵浦信号功率对能级2上激活粒子占比的影响 0)rayzv  
      yscale = 2, RmRPR<vGW  
      step = 5, qT~a`ou:  
      color = magenta, 6_g:2=6S  
      width = 3, #7['M;_  
      "population of level 2 (%, rightscale)", ;cfPS  
      finish set_P_in(pump, P_pump_in) .,F`*JVFq  
    BlfadM;  
    f: (set_P_in(pump,x); 100 * n_av(3)),   !改变泵浦信号功率对能级3上激活粒子占比的影响 7j8lhrM}^  
      yscale = 2, Lu CiO  
      step = 5, +E-CsNAZ*"  
      color = red, s;cGf+  
      width = 3, -G(#,rXk  
      "population of level 3 (%, rightscale)", 1YN w=  
      finish set_P_in(pump, P_pump_in) 89Ir}bCr  
    K5!OvqzG  
    H3L uRGe&2  
    ; ------------- yw1-4*$c  
    diagram 3:                         !输出图表3 +Jh1D_+!9  
    + w/B3 b  
    "Variation ofthe Fiber Length" 3~1Gts  
    8]D0)  
    x: 0.1, 5 iDWM-Ytx  
    "fiber length(m)", @x ![9$ru  
    y: 0, 10 ?Wc+ J4  
    "opticalpowers (W)", @y ow{J;vFy\  
    frame 0Wj,=9q  
    hx 2Z>8ROv^X  
    hy _L+j6N.h1  
    zx5#eMD  
    f: (set_L(x);P_out(signal_fw)),     !改变光纤长度对信号光输出功率的影响 (67byO{  
      step = 20,             X;n09 L`CB  
      color = blue, &0i$Y\g  
      width = 3, l <p(zLR  
      "signal output" -^3uQa<zN^  
    ,^RZ1tLz  
    ;f: (set_L(x);P_out(pump)),                     !改变光纤长度对泵浦信号输出功率的影响 IhRdn1&  
       step = 20, color = red, width = 3,"residual pump" 6-z(34&N  
    )-0+O=v  
    ! set_L(L_f) {restore the original fiber length } 0SQrz$y  
    udXzsY9Ng  
    '{-Ic?F<P  
    ; ------------- <4n"LJ9  
    diagram 4:                                  !输出图表4 {Fqwr>e  
    /b\c<'3NY  
    "TransverseProfiles" [(eX\kL  
    5mS/,fs@  
    I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) et"Pb_-U  
    u=tp80_  
    x: 0, 1.4 * r_co /um TOhWfl;  
    "radialposition (µm)", @x mx#%oJnsi  
    y: 0, 1.2 * I_max *cm^2 C`R<55x6  
    "intensity (W/ cm&sup2;)", @y N\];{pe>  
    y2: 0, 1.3 * N_Tm \E[6wB>uN%  
    frame 9J?lNq  
    hx ,"Fl/AjO  
    hy Kv2S&P|jXM  
    s/B_  
    f: N_dop(1, x * um,0),      !掺杂浓度的径向分布 ~KRS0 ^  
      yscale = 2, @]]&^ 7  
      color = gray, g/_0WW]}  
      width = 3, R$+p4@?S  
      maxconnect = 1, jZC[_p;  
      "N_dop (right scale)"  "iR:KW@  
    T@*'}*  
    f: I(pump, -1, x *um, 0) * cm^2,    !泵浦光沿光纤径向的强度分布 8N+T=c  
      color = red, =H3tkMoi2  
      maxconnect = 1,           !限制图形区域高度,修正为100%的高度 ,@/O\fit)  
      width = 3, K8Q3~bMf  
      "pump" S~hu(x#  
    X&kp1Ih<^  
    f: I(signal_fw, -1,x * um, 0) * cm^2,  !信号光沿光纤径向的强度分布 vQ]d?Tp  
      color = blue, +g kJrw  
      maxconnect = 1, nzaA_^`mB  
      width = 3, jRd$Vt  
      "signal" {z\K!=X/  
    _m[DieR  
    iEZ+Znon  
    ; ------------- d^J)Mhju  
    diagram 5:                                  !输出图表5 .6T0d 4,1  
    $dXx@6fP  
    "TransitionCross-sections" T=)qD2?  
    &x[7?Y L  
    I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) r~2hTie  
    :vX%0|  
    x: 1450, 2050 !><asaB]1  
    "wavelength(nm)", @x ZOMYo]  
    y: 0, 0.6 jw9v&/-  
    "cross-sections(1e-24 m&sup2;)", @y o<%0|n_O&  
    frame M2N8?Ycv3  
    hx ~ !!\#IX  
    hy TYb$+uY  
    KX]!yA  
    f: s12_Tm(x * nm) /1e-24,      !Tm3+吸收截面与波长的关系 {?5iK1|}K  
      color = red, * m^\&  
      width = 3, k}Q<#   
      "absorption" jS~Pdz  
    f: s21_Tm(x * nm) /1e-24,  !Tm3+发射截面与波长的关系 PkI+z_  
      color = blue, p7@R+F\.};  
      width = 3, Y*PfU +y~  
      "emission" x(vQ %JC  
    :>2wVN&\c  
     
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    只看该作者 1楼 发表于: 2021-09-28
    感谢,视频上有点看不清楚