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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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    只看楼主 倒序阅读 楼主  发表于: 2020-05-28
    (* % ."@Q$lA  
    Demo for program"RP Fiber Power": thulium-doped fiber laser, |J0Q,F]T  
    pumped at 790 nm. Across-relaxation process allows for efficient LfLFu9#:w  
    population of theupper laser level. is?2DcSl5  
    *)            !(*  *)注释语句 [xb]Wf  
    gNpJ24QK  
    diagram shown: 1,2,3,4,5  !指定输出图表 %Sk@GNI_  
    ; 1: "Powersvs. Position"     !分号是注释;光纤长度对功率的影响 CHJ> {b`O  
    ; 2:"Variation of the Pump Power"  !泵浦光功率变化对信号输出功率的影响 (08I  
    ; 3:"Variation of the Fiber Length"!信号输出功率vs 光纤长度的变化,仿真最佳光纤长度 LN2D  
    ; 4:"Transverse Profiles"             !横向分布,横坐标为半径位置 2F`cv1M  
    ; 5:"Transition Cross-sections"    !不同波长的跃迁横截面,横坐标波长,纵坐标为横截面 i/So6jW  
    C\ZkGX  
    include"Units.inc"         !读取“Units.inc”文件中内容 w}R~C   
    ww k PF  
    include"Tm-silicate.inc"    !读取光谱数据 oslJC$cy'  
    SP]IUdE\  
    ; Basic fiberparameters:    !定义基本光纤参数 a4i:|   
    L_f := 4 { fiberlength }      !光纤长度 m~hoE8C$  
    No_z_steps := 50 {no steps along the fiber } !光纤步长,大括号{ }是注释,相当于备注 nqVZqX@oE  
    r_co := 6 um { coreradius }                !纤芯半径 c`*TPqw(B[  
    N_Tm := 100e24 { Tmdoping concentration }  !纤芯Tm离子掺杂浓度 AJ^#eY5  
    )yK[Zb[  
    ; Parameters of thechannels:                !定义光信道 8qEK+yi,  
    l_p := 790 nm {pump wavelength }                !泵浦光波长790nm 8 ho[I]  
    dir_p := forward {pump direction (forward or backward) }   !前向泵浦 f:B>zp;N  
    P_pump_in := 5 {input pump power }                    !输入泵浦功率5W q .4A(,  
    w_p := 50 um {radius of pump cladding }               !包层泵浦相应的半径 50um `qVjwJ!+  
    I_p(r) := (r <=w_p) { pump intensity profile }          !泵浦光强度分布 fq[;%cr4  
    loss_p := 0 {parasitic losses of pump wave }           !泵浦光寄生损耗为0 SJt<+kg  
    t*<#<a  
    l_s := 1940 nm {signal wavelength }                   !信号光波长1940nm G~7 i@Zs  
    w_s := 7 um                          !信号光的半径 ._9 n~=!  
    I_s(r) := exp(-2 *(r / w_s)^2)            !信号光的高斯强度分布 YC_5YY(k  
    loss_s := 0                            !信号光寄生损耗为0 aVL=K  
    YXurYwV  
    R_oc := 0.70 {output coupler reflectivity (right side) }      !输出耦合反射率 W1B)]IHc  
    ORXm&z)  
    ; 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 c#IYFTz  
    calc so$(_W3E,  
      begin _p-t<ytnh  
        global allow all;                   !声明全局变量 SUKxkc(  
        set_fiber(L_f, No_z_steps, '');        !光纤参数 4MuO1W-  
        add_ring(r_co, N_Tm); Cv ejb+  
        def_ionsystem();              !光谱数据函数 0$+fkDf  
        pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  !泵浦光信道 A\_|un%  
        signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      !前向信号光信道 $;M:TpX  
        signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    !后向信号光信道 h7*W *Bd  
        set_R(signal_fw, 1, R_oc);                                 !设置反射率函数 5]I|DHmu  
        finish_fiber();                                   RB* J=  
      end; `@[c8j7  
    B+C);WQ,  
    ; Display someoutputs in the Output window (on the right side): !在Output aera区域显示输出 Uy ?  
    show "Outputpowers:"                                   !输出字符串Output powers: )*;zW! H  
    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) g.c8FP+  
    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) VvFC -r,=G  
    0;4t&v7  
    #_Z$2L"U  
    ; ------------- r:&` $8$  
    diagram 1:                   !输出图表1 OouPj@r  
    b^D$jY  
    "Powers vs.Position"          !图表名称 -[U1]R  
    kr$ b^"Ku  
    x: 0, L_f                      !命令x: 定义x坐标范围 /!^&;$A'  
    "position infiber (m)", @x      !x轴标签;@x 指示这些字符串沿坐标轴放置 o9xlu.QL{c  
    y: 0, 15                      !命令y: 定义y坐标范围 Yt|6 X:l  
    y2: 0, 100                    !命令y2: 定义第二个y坐标范围 [V'QrcCF  
    frame          !frame改变坐标系的设置 +dA,P\  
    legpos 600, 500  !图行在图表窗口中的位置(相对于左上角而言) SS`qJZ|w  
    hx             !平行于x方向网格 `(A5f71MfM  
    hy              !平行于y方向网格 E9?ph D  
    ? (*t@ {k  
    f: P(pump, x),    !命令f: 定义函数图;P(pump, x)函数是计算x位置处的泵浦光功率 >5s6u`\  
      color = red,  !图形颜色 H$G0`LP0/a  
      width = 3,   !width线条宽度 n,$IfC"  
      "pump"       !相应的文本字符串标签 A)%A!  
    f: P(signal_fw, x),  !P(signal_fw ,x) 函数是计算x位置处的前向信号光功率 V=fEPM  
      color = blue,     mUS_(0q  
      width = 3, :qChMU|Y6  
      "fw signal" 5_XV%-wM  
    f: P(signal_bw, x),   !P(signal_bw ,x) 函数是计算x位置处的后向信号光功率 x(<(t: ?o  
      color = blue, %dQxJMwj  
      style = fdashed, CPg+f1K  
      width = 3, dlhdsj:  
      "bw signal" "D?z  
    %QKZT=}  
    f: 100 * n(x, 2),    !n(x ,2) 函数是计算x位置处激活粒子数在能级2上的占比 N3u((y/  
      yscale = 2,            !第二个y轴的缩放比例 JXyM\}9-X  
      color = magenta, ynA|}X  
      width = 3, G$ _yy:  
      style = fdashed, 3 %.#}O,(  
      "n2 (%, right scale)" ~T) Q$  
    @?YRuwp L  
    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 V& C/Z}\  
      yscale = 2, Sz H"  
      color = red, ]4;PR("aU  
      width = 3, s21wxu:  
      style = fdashed, A:7k+4  
      "n3 (%, right scale)" 3;% 5Yu  
    71vkyn@"  
    S"Zp D.XX  
    ; ------------- =gcM%=*'  
    diagram 2:                    !输出图表2 $Y5)(  
    +3KEzo1=)  
    "Variation ofthe Pump Power" gY@N~'f;"  
    B'^:'uG  
    x: 0, 10 sZW^ !z  
    "pump inputpower (W)", @x $H+VA@_  
    y: 0, 10 5uxBK"q  
    y2: 0, 100 =0;^(/1Mc  
    frame ?_I[,N?@41  
    hx 765p/**  
    hy SJIOI@\b  
    legpos 150, 150 #> j.$2G>  
    +[5.WC7J  
    f: (set_P_in(pump, x);P_out(signal_fw)), !set_P_in(pump,x)改变泵浦信道功率;P_out(signal_fw)输出前向信号光 (PfqRk1Y  
      step = 5, 0{#8',*}m?  
      color = blue, P;k0W>~k  
      width = 3, sJ]taY ou  
      "signal output power (W, leftscale)",     !相应的文本字符串标签 {dmj/6Lc  
      finish set_P_in(pump, P_pump_in) ?s:d[To6  
    `[C!L *#,  
    f: (set_P_in(pump,x); 100 * n_av(2)),   !改变泵浦信号功率对能级2上激活粒子占比的影响 bT&: fHc  
      yscale = 2, gks{\H]  
      step = 5, /% kY0 LY  
      color = magenta, JGuN:c$  
      width = 3, `F/Tv 5@L  
      "population of level 2 (%, rightscale)", / ~^rr f  
      finish set_P_in(pump, P_pump_in) n5{Xj:}  
    6 ~ >FYX  
    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 U^Xm)lL  
      yscale = 2, b!)<-|IK  
      step = 5, "_`F\DGAZu  
      color = red, )n,P"0  
      width = 3, +"1NC\<*  
      "population of level 3 (%, rightscale)", 6oBfB8]:d  
      finish set_P_in(pump, P_pump_in) up'Tit  
    %Q.&ZhB  
    .jj$Kh q]  
    ; ------------- [o?* "c  
    diagram 3:                         !输出图表3 %JLk$sP9y`  
    / z}~zO  
    "Variation ofthe Fiber Length" z Toq^T  
    ,mj@sC>  
    x: 0.1, 5 JJ%ePgWT  
    "fiber length(m)", @x CxfRV L`7  
    y: 0, 10 c 9jGq  
    "opticalpowers (W)", @y &8z[`JW,T  
    frame Ps 8%J;  
    hx uV=Qp1~  
    hy '7oA< R  
    =KR NvW  
    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 rta:f800z  
      step = 20,             ]niJG t  
      color = blue, 0pbtH8~  
      width = 3, 4T=u`3pD7l  
      "signal output" Op_RzZP`  
    KG=h&  
    ;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 5sb\r,kW  
       step = 20, color = red, width = 3,"residual pump" IV)<5'v  
    v;0|U:`]  
    ! set_L(L_f) {restore the original fiber length } f/V 2f].  
    0lv %`,  
    xe*aC  
    ; ------------- /"B?1?qc,=  
    diagram 4:                                  !输出图表4 'z$Q rFW  
    V<j.xd7  
    "TransverseProfiles" Lliq j1&  
    gmm|A9+tv  
    I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) mL4]l(U  
    1n@8Kv  
    x: 0, 1.4 * r_co /um \.3D~2cU  
    "radialposition (µm)", @x n+PzA[  
    y: 0, 1.2 * I_max *cm^2 DS'n  
    "intensity (W/ cm&sup2;)", @y qBCK40   
    y2: 0, 1.3 * N_Tm {\(L%\sV@  
    frame ; k)@DX  
    hx d`F&aC  
    hy q5#J~n8Wr  
    l'3pQ;  
    f: N_dop(1, x * um,0),      !掺杂浓度的径向分布 et }T %~T  
      yscale = 2, |JVk&8 ?8  
      color = gray, <^lRUw  
      width = 3, kbMYMx.[  
      maxconnect = 1, ;]pJj6J&v  
      "N_dop (right scale)" >2Kh0rIH  
    PoT`}-9  
    f: I(pump, -1, x *um, 0) * cm^2,    !泵浦光沿光纤径向的强度分布 QV&D l_  
      color = red, 9J?wO9rI  
      maxconnect = 1,           !限制图形区域高度,修正为100%的高度 o5Q{/  
      width = 3, xa pq*oj  
      "pump" G;~V  
    YxP@!U9dE,  
    f: I(signal_fw, -1,x * um, 0) * cm^2,  !信号光沿光纤径向的强度分布 sUU{fNC6|  
      color = blue, lHhUC16>  
      maxconnect = 1, 48*Do}l]  
      width = 3, k0Uyf~p~  
      "signal" )kkhJI*v  
    afb+GA!  
    Qu]z)";7  
    ; ------------- ,Bal  
    diagram 5:                                  !输出图表5 `^4vT3e  
    FGh] S-A  
    "TransitionCross-sections" %,k] [V  
    XGkkB  
    I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) p^'3Odd|O  
    j<)9dEM'  
    x: 1450, 2050 |e2be1LD  
    "wavelength(nm)", @x H(&4[%;MP  
    y: 0, 0.6 \} ^E`b  
    "cross-sections(1e-24 m&sup2;)", @y :"!9_p(,,  
    frame >z.<u|r2  
    hx Jyqc2IH  
    hy |H! 9fZO  
    D7S'*;F  
    f: s12_Tm(x * nm) /1e-24,      !Tm3+吸收截面与波长的关系 PK4iuU`vh  
      color = red, W<E47  
      width = 3, )u qA(R>  
      "absorption" 78/N   
    f: s21_Tm(x * nm) /1e-24,  !Tm3+发射截面与波长的关系 17OH]  
      color = blue, -%I2[)F<  
      width = 3, {U_$&f9s  
      "emission" w#g#8o>'  
    X 51Yfr  
     
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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