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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
    (* 'J)9#  
    Demo for program"RP Fiber Power": thulium-doped fiber laser, fm$Qd^E|e  
    pumped at 790 nm. Across-relaxation process allows for efficient ] K+8f-  
    population of theupper laser level. R2Lq??XA=  
    *)            !(*  *)注释语句 1d$wP$  
    "([lkn  
    diagram shown: 1,2,3,4,5  !指定输出图表 %q.5; L  
    ; 1: "Powersvs. Position"     !分号是注释;光纤长度对功率的影响 *,)1Dcv(  
    ; 2:"Variation of the Pump Power"  !泵浦光功率变化对信号输出功率的影响 r*ziO#[  
    ; 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 G *<g%"  
    ; 4:"Transverse Profiles"             !横向分布,横坐标为半径位置 >QPCYo<E  
    ; 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 lk` |u$KPz  
    JEK_W<BD  
    include"Units.inc"         !读取“Units.inc”文件中内容 #bCUI*N"P  
    NZlCn:"  
    include"Tm-silicate.inc"    !读取光谱数据 VbNN1'a-  
    "Xl"H/3r  
    ; Basic fiberparameters:    !定义基本光纤参数 1@}<CWE9  
    L_f := 4 { fiberlength }      !光纤长度 0X$2~jV>  
    No_z_steps := 50 {no steps along the fiber } !光纤步长,大括号{ }是注释,相当于备注 O]?\<&y  
    r_co := 6 um { coreradius }                !纤芯半径 b&]z^_m)  
    N_Tm := 100e24 { Tmdoping concentration }  !纤芯Tm离子掺杂浓度 BqpJvRJd  
    +U>Y.YP  
    ; Parameters of thechannels:                !定义光信道 i>C%[dk9  
    l_p := 790 nm {pump wavelength }                !泵浦光波长790nm W e*uZ?+  
    dir_p := forward {pump direction (forward or backward) }   !前向泵浦 fF2] 7:  
    P_pump_in := 5 {input pump power }                    !输入泵浦功率5W 3lKs>HE0  
    w_p := 50 um {radius of pump cladding }               !包层泵浦相应的半径 50um oTr,zRL  
    I_p(r) := (r <=w_p) { pump intensity profile }          !泵浦光强度分布 `=Rxnl,<U  
    loss_p := 0 {parasitic losses of pump wave }           !泵浦光寄生损耗为0 uL:NWgN  
    /XNC^!z6Js  
    l_s := 1940 nm {signal wavelength }                   !信号光波长1940nm ^W`RBrJay  
    w_s := 7 um                          !信号光的半径 YgtW(j[  
    I_s(r) := exp(-2 *(r / w_s)^2)            !信号光的高斯强度分布 4QYStDFe  
    loss_s := 0                            !信号光寄生损耗为0 >.H}(!  
    b ZZ _yc  
    R_oc := 0.70 {output coupler reflectivity (right side) }      !输出耦合反射率 4^9qs%&  
    9j}Q~v\  
    ; 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 }*!_M3O  
    calc Pj*]%V  
      begin :*R+ee,& -  
        global allow all;                   !声明全局变量 a/rQ@c>  
        set_fiber(L_f, No_z_steps, '');        !光纤参数 bxWzm|  
        add_ring(r_co, N_Tm); F>?~4y,b7  
        def_ionsystem();              !光谱数据函数 xa 967Ki9"  
        pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  !泵浦光信道 1c*:" k  
        signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      !前向信号光信道 &'/bnN +R  
        signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    !后向信号光信道 ]vw%J ^7:a  
        set_R(signal_fw, 1, R_oc);                                 !设置反射率函数 _bv9/#tR  
        finish_fiber();                                   %`s1 Ocvp  
      end; ) % gU  
    3ly ]DTbz  
    ; Display someoutputs in the Output window (on the right side): !在Output aera区域显示输出 \5a;_N[Ed  
    show "Outputpowers:"                                   !输出字符串Output powers: 8|u8J0^  
    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) ?B`c <H"  
    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) H> n;[  
    !<F5W <V  
    -I z,vd  
    ; ------------- 9)n3f^,Oj*  
    diagram 1:                   !输出图表1 9niffq)h  
    vq\L9$WJ  
    "Powers vs.Position"          !图表名称 Wd7qpWItjQ  
    VkId6k:>6C  
    x: 0, L_f                      !命令x: 定义x坐标范围 e5w0}/yW/  
    "position infiber (m)", @x      !x轴标签;@x 指示这些字符串沿坐标轴放置 .$+,Y4q~(  
    y: 0, 15                      !命令y: 定义y坐标范围 DweF8c  
    y2: 0, 100                    !命令y2: 定义第二个y坐标范围 %][zn$aa|  
    frame          !frame改变坐标系的设置 dV^ck+  
    legpos 600, 500  !图行在图表窗口中的位置(相对于左上角而言) SP vKq=,  
    hx             !平行于x方向网格 +xU=7chA  
    hy              !平行于y方向网格 <2LUq@Pg  
    r jnf30  
    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 gEmsPk,  
      color = red,  !图形颜色 0&3zBL%Bo  
      width = 3,   !width线条宽度 %+(fdk-k+  
      "pump"       !相应的文本字符串标签 +JB*1dz>8  
    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 I]Z"?T  
      color = blue,     }{[p<pU$C  
      width = 3, 3qDuF  
      "fw signal" dd@ D s  
    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 KPZqPtb;  
      color = blue, qg*xdefQ%  
      style = fdashed, ;Wn0-`_1,  
      width = 3, aq9Ej]1b  
      "bw signal" n0uL^{B  
    @y|JIBBRc  
    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 " "CNw-^t  
      yscale = 2,            !第二个y轴的缩放比例 >/.Ae8I)  
      color = magenta, R78P](1\>  
      width = 3, _1jeaV9@  
      style = fdashed, 1NAtg*`  
      "n2 (%, right scale)" A8ClkLC;I  
    l HZ4N{n  
    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%h[o9i  
      yscale = 2, "&\]1A}Z-x  
      color = red, WVx^}_FD0  
      width = 3, %.:]4jhk  
      style = fdashed, b\xse2#  
      "n3 (%, right scale)" NH,4>mV$!  
    vs*@)'n0}  
    iUS?xKN$~-  
    ; ------------- h|EHK!<"8  
    diagram 2:                    !输出图表2 yq`  ,)  
    )2F%^<gZ#  
    "Variation ofthe Pump Power" 7[M@;$  
    v5L#H=P  
    x: 0, 10 P_E xh]P  
    "pump inputpower (W)", @x .zJZ*\2ob  
    y: 0, 10 Oz=!EG|N  
    y2: 0, 100 }5u;'>$  
    frame djDE0-QxcR  
    hx ,(kaC.Em  
    hy %:Zp7O2UB'  
    legpos 150, 150 $o*p#LU  
    UJ&gm_M+kL  
    f: (set_P_in(pump, x);P_out(signal_fw)), !set_P_in(pump,x)改变泵浦信道功率;P_out(signal_fw)输出前向信号光 fBP J8VY  
      step = 5, VS+5{w:t  
      color = blue, M:%Ll3  
      width = 3, @Z@S;RWSU  
      "signal output power (W, leftscale)",     !相应的文本字符串标签 o H]FT{  
      finish set_P_in(pump, P_pump_in) px^brzLQo  
    -M-y*P)  
    f: (set_P_in(pump,x); 100 * n_av(2)),   !改变泵浦信号功率对能级2上激活粒子占比的影响 wOR#sp&  
      yscale = 2, z| zd=3c  
      step = 5, T{Yk/Z/}?  
      color = magenta, J 77*Ue ^  
      width = 3, bE"J&;|  
      "population of level 2 (%, rightscale)", ^K!R4Y4t  
      finish set_P_in(pump, P_pump_in) ZIaFvm&q7Z  
    ,fyqa  
    f: (set_P_in(pump,x); 100 * n_av(3)),   !改变泵浦信号功率对能级3上激活粒子占比的影响 w)Y}hlcq  
      yscale = 2, V`LW~P;  
      step = 5, w6[$vib'  
      color = red, R)9FXz$).  
      width = 3, 4$4n9`odE  
      "population of level 3 (%, rightscale)", Q0TKM >  
      finish set_P_in(pump, P_pump_in) 62>/0_m5  
    L%f$ &  
    \3cg\Q+~  
    ; ------------- &- ZRS/_d>  
    diagram 3:                         !输出图表3 Z DnAzAR  
    TK#-;p_  
    "Variation ofthe Fiber Length" CfHPJ: Qo[  
    s;:quM  
    x: 0.1, 5 6X$iTJ[\x  
    "fiber length(m)", @x eRIdN(pP  
    y: 0, 10 B zr}+J  
    "opticalpowers (W)", @y 3$kElq[  
    frame q<A,S8'm  
    hx rXnG"A  
    hy DZX4c2J  
    CIf""gL9  
    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 \J^xpR_0u  
      step = 20,             f8 L3+u  
      color = blue, ^Kh>La:>O  
      width = 3, .t{?doOT  
      "signal output"  SwmX_F#_  
    aB4L$M8x  
    ;f: (set_L(x);P_out(pump)),                     !改变光纤长度对泵浦信号输出功率的影响 Py#iC#g~  
       step = 20, color = red, width = 3,"residual pump" 3hNb ?  
    (OHd} YQ  
    ! set_L(L_f) {restore the original fiber length } g?!;04  
    JT 5+d ,  
    '5n=tRx  
    ; ------------- \ffU15@N  
    diagram 4:                                  !输出图表4 Uc|MfxsL  
    ktK/s!bgY  
    "TransverseProfiles" 1z=}`,?>  
    DZ0\pp?S  
    I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) Vq#_/23=$y  
    !)'|Y5 o  
    x: 0, 1.4 * r_co /um 4$b9<:M_  
    "radialposition (µm)", @x Cl3hpqv1I  
    y: 0, 1.2 * I_max *cm^2 ak;S Ie  
    "intensity (W/ cm&sup2;)", @y }#U3vMx(  
    y2: 0, 1.3 * N_Tm %q,^A+=  
    frame q"pnFK9/L  
    hx T 9?!.o  
    hy GE.@*W  
    U HUO9h  
    f: N_dop(1, x * um,0),      !掺杂浓度的径向分布 ,=p.Cx'PR  
      yscale = 2, -qRO}EF  
      color = gray, (3Z~EIZz  
      width = 3, Bn{0-5nj  
      maxconnect = 1, jRIm_)  
      "N_dop (right scale)" _7w2E   
    MEn#MT/Cz  
    f: I(pump, -1, x *um, 0) * cm^2,    !泵浦光沿光纤径向的强度分布 _i{4 4zE  
      color = red, {p@uj_pS  
      maxconnect = 1,           !限制图形区域高度,修正为100%的高度 esQRg~aCGy  
      width = 3, U9p^?\-=  
      "pump" .:#6dG\0z  
    ZI#Xh5  
    f: I(signal_fw, -1,x * um, 0) * cm^2,  !信号光沿光纤径向的强度分布 z?8Sie  
      color = blue, Q CB~x2C  
      maxconnect = 1, A'X, zw^}  
      width = 3, 6KI< J*Wz`  
      "signal" uP[:P?,t  
    H=k*;'  
    8?7:sfc  
    ; ------------- XS/5y(W  
    diagram 5:                                  !输出图表5 h8_~ OX  
    _Uz}z#jt  
    "TransitionCross-sections" f*SAbDE  
    c F (]`49(  
    I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) VG`A* Vj  
    9#@CmiIhy  
    x: 1450, 2050 !Rw\k'<GKX  
    "wavelength(nm)", @x ?V&[U  
    y: 0, 0.6 2=l !b/m  
    "cross-sections(1e-24 m&sup2;)", @y &c!=< <5M  
    frame (_lc< Bj  
    hx |!{ BjOAD'  
    hy QP e}rQnm  
    QYL ';  
    f: s12_Tm(x * nm) /1e-24,      !Tm3+吸收截面与波长的关系 %7?v='s=  
      color = red, Kv:ih=?  
      width = 3, q}["Nww-  
      "absorption" $'Hg}|53  
    f: s21_Tm(x * nm) /1e-24,  !Tm3+发射截面与波长的关系 c!%:f^7g  
      color = blue, TY|]""3 f9  
      width = 3, P!";$]+  
      "emission" AcF;5h  
    J ZQ$*K  
     
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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