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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
    (* Nr(WbD[T  
    Demo for program"RP Fiber Power": thulium-doped fiber laser, 4 &|9304<H  
    pumped at 790 nm. Across-relaxation process allows for efficient O]2h=M@q.  
    population of theupper laser level. ut\9@>*J=Q  
    *)            !(*  *)注释语句 }qlz^s  
    %0u7pk  
    diagram shown: 1,2,3,4,5  !指定输出图表 !J2Lp  
    ; 1: "Powersvs. Position"     !分号是注释;光纤长度对功率的影响 mZM5aTQ3  
    ; 2:"Variation of the Pump Power"  !泵浦光功率变化对信号输出功率的影响 y"9TS,lmK  
    ; 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 `DA=';>Y  
    ; 4:"Transverse Profiles"             !横向分布,横坐标为半径位置 d!wd,Xj}  
    ; 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 gJF;yW 4  
    #K)HuT  
    include"Units.inc"         !读取“Units.inc”文件中内容 CWDo_g $  
    {'r*Jb0  
    include"Tm-silicate.inc"    !读取光谱数据 41C=O@9m  
    CyXcA;H,.  
    ; Basic fiberparameters:    !定义基本光纤参数 ;G\rhk  
    L_f := 4 { fiberlength }      !光纤长度 7rr5$,Mv  
    No_z_steps := 50 {no steps along the fiber } !光纤步长,大括号{ }是注释,相当于备注 xMuy[)b  
    r_co := 6 um { coreradius }                !纤芯半径 7NXT.E~2  
    N_Tm := 100e24 { Tmdoping concentration }  !纤芯Tm离子掺杂浓度 dG)A-qbV  
    O:Z|fDQ`  
    ; Parameters of thechannels:                !定义光信道 <B``/EX^  
    l_p := 790 nm {pump wavelength }                !泵浦光波长790nm 9X*q^u  
    dir_p := forward {pump direction (forward or backward) }   !前向泵浦 75v*&-  
    P_pump_in := 5 {input pump power }                    !输入泵浦功率5W +b{h*WWdj  
    w_p := 50 um {radius of pump cladding }               !包层泵浦相应的半径 50um 0`qq"j[6a  
    I_p(r) := (r <=w_p) { pump intensity profile }          !泵浦光强度分布 &<>A  
    loss_p := 0 {parasitic losses of pump wave }           !泵浦光寄生损耗为0 gXfAz,  
    q&W#nWBV  
    l_s := 1940 nm {signal wavelength }                   !信号光波长1940nm C]):+F<7  
    w_s := 7 um                          !信号光的半径 H[G EAQO  
    I_s(r) := exp(-2 *(r / w_s)^2)            !信号光的高斯强度分布 'Klz`)F  
    loss_s := 0                            !信号光寄生损耗为0 |w>DZG!}1-  
    x208^=F\\  
    R_oc := 0.70 {output coupler reflectivity (right side) }      !输出耦合反射率 $8eq&_gJ  
    )8N/t6Q  
    ; 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 RdY#B;  
    calc ER|5_  
      begin Q;^([39DI  
        global allow all;                   !声明全局变量 c9ZoO;  
        set_fiber(L_f, No_z_steps, '');        !光纤参数 $qEJO=v  
        add_ring(r_co, N_Tm); <w:fR|O  
        def_ionsystem();              !光谱数据函数 Cn{UzSKfs  
        pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  !泵浦光信道 o1g[(zky  
        signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      !前向信号光信道 97&6iTYA  
        signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    !后向信号光信道 [ z&y]~  
        set_R(signal_fw, 1, R_oc);                                 !设置反射率函数 N4}h_mh^'  
        finish_fiber();                                   P]x@h  
      end; &#)3v8  
    -0Q!:5EC  
    ; Display someoutputs in the Output window (on the right side): !在Output aera区域显示输出 |0bSxPXn!  
    show "Outputpowers:"                                   !输出字符串Output powers: 6zI?K4o  
    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) Df4n9m}E  
    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) 7u}r^+6_o  
    6Q>w\@lF  
    J7maG|S(DF  
    ; ------------- P&SR;{:y  
    diagram 1:                   !输出图表1 [NFAdE  
    v>e4a/  
    "Powers vs.Position"          !图表名称 u9&p/qMx2  
    FUOvH 85f  
    x: 0, L_f                      !命令x: 定义x坐标范围 R.fRQ>rI  
    "position infiber (m)", @x      !x轴标签;@x 指示这些字符串沿坐标轴放置 cK?t]%S  
    y: 0, 15                      !命令y: 定义y坐标范围 &=UzF  
    y2: 0, 100                    !命令y2: 定义第二个y坐标范围 8~I>t9Q+  
    frame          !frame改变坐标系的设置 bEE:6)]G  
    legpos 600, 500  !图行在图表窗口中的位置(相对于左上角而言) #" OKO6]  
    hx             !平行于x方向网格 p;H1,E:Re#  
    hy              !平行于y方向网格 9 o18VJR  
    Z*Y?"1ar  
    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 ht-6_]+ME  
      color = red,  !图形颜色 XNl!(2x'pb  
      width = 3,   !width线条宽度 jBQQ?cA  
      "pump"       !相应的文本字符串标签 T S.lFg:K  
    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 V]8fn MH  
      color = blue,     4 I~,B[|  
      width = 3, ULJI` I|m  
      "fw signal" 4EELaP|%  
    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 p 2i5/Ly  
      color = blue, 8[Qw8z5-  
      style = fdashed, ox*Ka]  
      width = 3, /U`"|3  
      "bw signal" ?L $KlF Y  
    ,yT4(cMBk?  
    f: 100 * n(x, 2),    !n(x ,2) 函数是计算x位置处激活粒子数在能级2上的占比 TwkzX|  
      yscale = 2,            !第二个y轴的缩放比例 [J];  
      color = magenta, *kIJv?%_}  
      width = 3, &sKYO<6K }  
      style = fdashed, 8e-{S~@W  
      "n2 (%, right scale)" bw[!f4~  
    1TVTP2&Rd  
    f: 100 * n(x, 3),          !n(x ,3) 函数是计算x位置处激活粒子数在能级3上的占比  ;js7rt  
      yscale = 2, );6zV_^!  
      color = red, vKW%l  
      width = 3, -R8RAwsLG  
      style = fdashed, Vr^wesT\Hx  
      "n3 (%, right scale)" f+1]#"9i|  
    {P]l{W@li  
    3Q#VD)  
    ; ------------- 7~65@&P>  
    diagram 2:                    !输出图表2 wVPq1? 9  
    e^FS/=  
    "Variation ofthe Pump Power" 4*54"[9Hr#  
    ,aN/``j=  
    x: 0, 10 x?%vqg^r  
    "pump inputpower (W)", @x /yOd]N;$  
    y: 0, 10 'Hg(N?1"  
    y2: 0, 100 <wuP*vI "h  
    frame kSJWQ  
    hx $""[( d?0  
    hy z(m*]kpL"  
    legpos 150, 150 "au"\}   
    A ssf f;  
    f: (set_P_in(pump, x);P_out(signal_fw)), !set_P_in(pump,x)改变泵浦信道功率;P_out(signal_fw)输出前向信号光 n% *u;iG  
      step = 5, X=JSqO6V9  
      color = blue, m$o|s1t  
      width = 3, w&H ?;1  
      "signal output power (W, leftscale)",     !相应的文本字符串标签 e"b F"L  
      finish set_P_in(pump, P_pump_in) \<P W_'6  
    8'?e4;O  
    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 }Orc;_)r  
      yscale = 2, 06ueE\@Sg  
      step = 5, HU'd/5fun  
      color = magenta, _#L IG2d  
      width = 3, %0]&o, w{  
      "population of level 2 (%, rightscale)", *s!8BwiE  
      finish set_P_in(pump, P_pump_in) & =frt3  
    1jV^\ x0  
    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 lfGiw^  
      yscale = 2, & .#0jb1r  
      step = 5, &&m%=i.qK  
      color = red, c)lK{DC  
      width = 3, Mpj3<vj   
      "population of level 3 (%, rightscale)", T&!>lqU!J  
      finish set_P_in(pump, P_pump_in) R1S Ev$  
    ?>,aq>2O$  
    KctD=6  
    ; ------------- D8h~?phK  
    diagram 3:                         !输出图表3 R#r?<Ofw4  
    S`R ( _eD@  
    "Variation ofthe Fiber Length" bT>^% H3  
    ou(9Qf zN  
    x: 0.1, 5 Z^h4%o-l{  
    "fiber length(m)", @x "'PDreS  
    y: 0, 10 g<,|Q5bK  
    "opticalpowers (W)", @y fkx 9I m4  
    frame q<7Nz] Td  
    hx !q/?t XM!  
    hy H,uOshR  
    ./6L&?*`~;  
    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 / '7WL[<  
      step = 20,             :H?p^d e  
      color = blue, {o]OxqE@  
      width = 3, a. gu  
      "signal output" ad"&c*m[  
    `*~:n vU  
    ;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 7f`jl/   
       step = 20, color = red, width = 3,"residual pump" plp).Gq  
    C 4n5U^  
    ! set_L(L_f) {restore the original fiber length } `j<'*v zo  
    7{b|+0W  
    Z1>pOJm  
    ; ------------- qV(Plt%  
    diagram 4:                                  !输出图表4 mp5]=6 ~:m  
    2S/^"IM["  
    "TransverseProfiles" [szwPNQ_  
    !E*-\}[  
    I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) iBc( @EJ  
    0.Iw/e  
    x: 0, 1.4 * r_co /um }we"IqLb  
    "radialposition (µm)", @x |D^[]*cEH  
    y: 0, 1.2 * I_max *cm^2 v=/V<3  
    "intensity (W/ cm&sup2;)", @y 1dKLNE  
    y2: 0, 1.3 * N_Tm ,2]6cP(6qQ  
    frame >`lf1x  
    hx W58 \V  
    hy 3kJAaI8   
    +C+3DwN  
    f: N_dop(1, x * um,0),      !掺杂浓度的径向分布 htkyywv  
      yscale = 2, S#ven&  
      color = gray, 'T.> oP0>  
      width = 3, "r|O /   
      maxconnect = 1, 4[5Z>2w  
      "N_dop (right scale)" ]r#tJ T`M  
    QALMF rWH  
    f: I(pump, -1, x *um, 0) * cm^2,    !泵浦光沿光纤径向的强度分布 K{ 0mb  
      color = red, @5kN L~2  
      maxconnect = 1,           !限制图形区域高度,修正为100%的高度 tw.%'oJ7  
      width = 3, M,<%j  
      "pump" m@yaF: R  
    x-q er-  
    f: I(signal_fw, -1,x * um, 0) * cm^2,  !信号光沿光纤径向的强度分布 m6JIq}CMb  
      color = blue, 1ra}^H}  
      maxconnect = 1, yhTe*I=Gk  
      width = 3, |"ck;.)  
      "signal" 2Gx&ECa,  
    NW~n+uk5v  
    c[Y7tj%y  
    ; ------------- fXL$CgXG\x  
    diagram 5:                                  !输出图表5 1 iE  
     ) .#,1  
    "TransitionCross-sections" S__ o#nf`%  
    ^D6JckW  
    I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) {)`5*sd  
    _tYt<oB~%  
    x: 1450, 2050 AU)Qk$c  
    "wavelength(nm)", @x Vg2s~ce{  
    y: 0, 0.6 &&tQ,5H5  
    "cross-sections(1e-24 m&sup2;)", @y *X,vu2(I-=  
    frame in%+)`'nH7  
    hx gBresHrlH  
    hy bk"` hq  
    =WN6Fj`  
    f: s12_Tm(x * nm) /1e-24,      !Tm3+吸收截面与波长的关系 & 8e~<  
      color = red, :e gSW2"5S  
      width = 3, %(n4`@  
      "absorption" 8 v&5)0u  
    f: s21_Tm(x * nm) /1e-24,  !Tm3+发射截面与波长的关系 )0/ D Y  
      color = blue, :vc[ iZ  
      width = 3, Z\NC+{7k]  
      "emission" v6iV#yz3(  
    0;V2>!  
     
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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