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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
    (* DTl&V|h$  
    Demo for program"RP Fiber Power": thulium-doped fiber laser, lL&p?MUp  
    pumped at 790 nm. Across-relaxation process allows for efficient h9QQ8}g  
    population of theupper laser level. d?><+!a  
    *)            !(*  *)注释语句 p+V::O&&r  
    k#G+<7c<  
    diagram shown: 1,2,3,4,5  !指定输出图表 m}t`43}QE  
    ; 1: "Powersvs. Position"     !分号是注释;光纤长度对功率的影响 \zzPsnFIg  
    ; 2:"Variation of the Pump Power"  !泵浦光功率变化对信号输出功率的影响 vj"['6Xa  
    ; 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 S2?)Sb`  
    ; 4:"Transverse Profiles"             !横向分布,横坐标为半径位置 B-V   
    ; 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 Y#FSU# a$<  
    }[OEtd{  
    include"Units.inc"         !读取“Units.inc”文件中内容 {6iHUK   
    06I(01M1   
    include"Tm-silicate.inc"    !读取光谱数据 S"/gZfxer  
    jV' tcFr4  
    ; Basic fiberparameters:    !定义基本光纤参数 0oo_m6ie&  
    L_f := 4 { fiberlength }      !光纤长度 }] . |7h  
    No_z_steps := 50 {no steps along the fiber } !光纤步长,大括号{ }是注释,相当于备注 qWJa p-hb  
    r_co := 6 um { coreradius }                !纤芯半径 :@S=0|:j  
    N_Tm := 100e24 { Tmdoping concentration }  !纤芯Tm离子掺杂浓度 ~>$z1o&}.  
    &Q t1~#1  
    ; Parameters of thechannels:                !定义光信道 L08" 8\  
    l_p := 790 nm {pump wavelength }                !泵浦光波长790nm ZVz*1]}  
    dir_p := forward {pump direction (forward or backward) }   !前向泵浦 Vu,:rPqI  
    P_pump_in := 5 {input pump power }                    !输入泵浦功率5W ?uXY6J"  
    w_p := 50 um {radius of pump cladding }               !包层泵浦相应的半径 50um ZWx4/G  
    I_p(r) := (r <=w_p) { pump intensity profile }          !泵浦光强度分布 XlJ+:st  
    loss_p := 0 {parasitic losses of pump wave }           !泵浦光寄生损耗为0 p<&dy^mS  
    qG0gc\C}  
    l_s := 1940 nm {signal wavelength }                   !信号光波长1940nm 8xHjdQr  
    w_s := 7 um                          !信号光的半径 i~tps  
    I_s(r) := exp(-2 *(r / w_s)^2)            !信号光的高斯强度分布 `3.bux~  
    loss_s := 0                            !信号光寄生损耗为0 ^ ?T,>ZI  
    \>+BvF  
    R_oc := 0.70 {output coupler reflectivity (right side) }      !输出耦合反射率 `!.c_%m2  
    \$ :)Ka  
    ; 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 t}gK)"g  
    calc kS_3 7-;  
      begin kp*BAQ  
        global allow all;                   !声明全局变量 w^/"j_p@  
        set_fiber(L_f, No_z_steps, '');        !光纤参数 uN6xOq/  
        add_ring(r_co, N_Tm); +Q!Kj7EU/  
        def_ionsystem();              !光谱数据函数 dfs1BV'  
        pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  !泵浦光信道 7G_OFD  
        signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      !前向信号光信道 >k(AQW5?  
        signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    !后向信号光信道 Hzc^fC  
        set_R(signal_fw, 1, R_oc);                                 !设置反射率函数 P> ~Lx  
        finish_fiber();                                   >c.HH}O0W  
      end; )`zfDio-1V  
    sJ|IW0Mr  
    ; Display someoutputs in the Output window (on the right side): !在Output aera区域显示输出 *'R2Lo<C  
    show "Outputpowers:"                                   !输出字符串Output powers: "H}ae7@  
    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) F-Ywl)  
    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) 2_){4+,fu  
    /(bn+l}W  
    s=n_(}{ q  
    ; ------------- &XSe&1  
    diagram 1:                   !输出图表1 Zh_ P  
    M:w]g`LKl  
    "Powers vs.Position"          !图表名称 %`:+A?zL  
    UFUm-~x`  
    x: 0, L_f                      !命令x: 定义x坐标范围 p fg>H  
    "position infiber (m)", @x      !x轴标签;@x 指示这些字符串沿坐标轴放置 hj[sxC>z5  
    y: 0, 15                      !命令y: 定义y坐标范围 jce2lXMm  
    y2: 0, 100                    !命令y2: 定义第二个y坐标范围 qFjnuQ,w  
    frame          !frame改变坐标系的设置 ="]y^&(L(  
    legpos 600, 500  !图行在图表窗口中的位置(相对于左上角而言) :N>s#{+"3  
    hx             !平行于x方向网格 LU@+O12  
    hy              !平行于y方向网格 y#5;wb<1  
    S]biN]+7s  
    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 Q3x.qz  
      color = red,  !图形颜色 SZD@<3Nb  
      width = 3,   !width线条宽度 U KdCG.E9^  
      "pump"       !相应的文本字符串标签 JC4Z^/\.  
    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 E)F"!56lV  
      color = blue,     Q |^c5  
      width = 3, N9cUlrDO  
      "fw signal" x<{)xP+|  
    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 U`ELd:  
      color = blue, !,PoH  
      style = fdashed, 7 *HBb-  
      width = 3, z>W'Ra6  
      "bw signal" 5[$jrG\!  
    )UG<KcdI  
    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 ,?s: s&4  
      yscale = 2,            !第二个y轴的缩放比例 )L:p.E  
      color = magenta, pc<A ,?  
      width = 3, h`/1JjP  
      style = fdashed, 04R-}  
      "n2 (%, right scale)" u\|Ys  
    >zB0+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 {siIRl2&  
      yscale = 2, t~FOaSt  
      color = red, KmRxbf  
      width = 3, :[7.YQ   
      style = fdashed, L\X 2Olfz1  
      "n3 (%, right scale)" ziui  
    SiSx ym  
    kc70HrG  
    ; ------------- v"G)G)*z  
    diagram 2:                    !输出图表2 1\+d 5Q0  
    p*]nCUs}n  
    "Variation ofthe Pump Power" $WK~|+"{>  
    NKb,>TO  
    x: 0, 10 Ie8jBf -  
    "pump inputpower (W)", @x mmrz:_  
    y: 0, 10 8?&u5  
    y2: 0, 100 Smlf9h&  
    frame Lj03Mx.2S  
    hx Se-n#  
    hy t@\op}Z-M  
    legpos 150, 150 @^kt[$X;  
    $N)b6(}F10  
    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 +cnBEv~y  
      step = 5, tB7g.)yZb  
      color = blue, ,BG L|5?3z  
      width = 3, Vtr5<:eEx  
      "signal output power (W, leftscale)",     !相应的文本字符串标签 p8Wik<'^  
      finish set_P_in(pump, P_pump_in) \@HsMV2+zN  
    wsLfp82  
    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 #q%V|Ajq  
      yscale = 2, 42mZ.,<  
      step = 5, X6Hd%}*mN  
      color = magenta, Z6xM(*vg  
      width = 3, /DBldL7yi  
      "population of level 2 (%, rightscale)", )w++cC4/5  
      finish set_P_in(pump, P_pump_in) BTu_$5F  
    3fWL}]{<a  
    f: (set_P_in(pump,x); 100 * n_av(3)),   !改变泵浦信号功率对能级3上激活粒子占比的影响 t!,GI&  
      yscale = 2, L H`z '7&/  
      step = 5, Xi!`+N4  
      color = red, '+ cPx\4  
      width = 3, :F`yAB3  
      "population of level 3 (%, rightscale)", =Wj{J.7mf]  
      finish set_P_in(pump, P_pump_in) jVtRn.qh  
    B> LL *  
    J_Pb R b  
    ; ------------- d=_Wgz,d  
    diagram 3:                         !输出图表3 =^LX,!2zp{  
    yl[6b1  
    "Variation ofthe Fiber Length" 7D%}( pX  
    1v^eXvY  
    x: 0.1, 5 u9}k^W)E  
    "fiber length(m)", @x Hs~u&c  
    y: 0, 10 1]<w ZV}.  
    "opticalpowers (W)", @y _ X* A  
    frame D~s TQfWr  
    hx 9G@ J#vsqr  
    hy .j)f'<;%  
    }}'0r2S  
    f: (set_L(x);P_out(signal_fw)),     !改变光纤长度对信号光输出功率的影响 mt(2HBNoz  
      step = 20,             qJZ5w }  
      color = blue,  )6 _+  
      width = 3, T1Q c?5K^  
      "signal output" M@/Hd0$  
    dNL<O   
    ;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 oJEUNgY&  
       step = 20, color = red, width = 3,"residual pump" BL^8gtdn  
    Cg! ]x o  
    ! set_L(L_f) {restore the original fiber length } /{9"O y7E  
    n rpxZA  
    &m>sGCZ  
    ; ------------- c)tG1|Og]  
    diagram 4:                                  !输出图表4 +=/FKzT<  
    Uxyj\p  
    "TransverseProfiles" Zh]FL8[ nc  
    _V`Gmy[]p  
    I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) ?Hd/!I&  
    _26<}&]b*  
    x: 0, 1.4 * r_co /um @N-P[.qL"  
    "radialposition (µm)", @x RN%*3{-  
    y: 0, 1.2 * I_max *cm^2 4/Yk;X[jk  
    "intensity (W/ cm&sup2;)", @y >;A7mi/  
    y2: 0, 1.3 * N_Tm kCu"G  
    frame G-)Q*p{i|  
    hx `]8z]PD  
    hy $C;)Tlh  
    6?3f+=e"~!  
    f: N_dop(1, x * um,0),      !掺杂浓度的径向分布 n^Uu6  
      yscale = 2, H^c8r^#  
      color = gray, q)ns ui(  
      width = 3, s]"NqwIPK  
      maxconnect = 1, }op0`-Xb  
      "N_dop (right scale)" #Wz7ju;  
    6jKZ.S+s)  
    f: I(pump, -1, x *um, 0) * cm^2,    !泵浦光沿光纤径向的强度分布 !Cpy )D(  
      color = red, ~P47:IZf  
      maxconnect = 1,           !限制图形区域高度,修正为100%的高度 {Di()]/  
      width = 3, 2)A% 'Akf  
      "pump" 1$*ZN4  
    /8(\AuDT  
    f: I(signal_fw, -1,x * um, 0) * cm^2,  !信号光沿光纤径向的强度分布 5)rMoYn25  
      color = blue, ,p,$(V  
      maxconnect = 1, 'TF5CNX  
      width = 3, )\bA'LuFy  
      "signal" 8 pQx6QE  
    /7nircXj@  
    2k}" 52  
    ; ------------- ky`xBO =  
    diagram 5:                                  !输出图表5 <R TAO2  
    3Vu_-.ID  
    "TransitionCross-sections" B J0P1vh6M  
    KZ"&c~[  
    I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) 0.9%m7.m  
    _7h:NLd  
    x: 1450, 2050 JfJLJ(}  
    "wavelength(nm)", @x _%xe:X+ M  
    y: 0, 0.6 xIN&>D'|N  
    "cross-sections(1e-24 m&sup2;)", @y !&$uq|-  
    frame ,[ UqUEO  
    hx L*Gk1'  
    hy s7A3CY]->  
    6`tc]a"#Zb  
    f: s12_Tm(x * nm) /1e-24,      !Tm3+吸收截面与波长的关系 x.+r.cAXH  
      color = red, < )dqv0=  
      width = 3, U.fL uKt  
      "absorption" *?2aIz"  
    f: s21_Tm(x * nm) /1e-24,  !Tm3+发射截面与波长的关系 <}G*/ z?/  
      color = blue, {<~oa+"  
      width = 3, p f\ Ybbs  
      "emission" ig Q,ZY1  
    3y[6n$U&  
     
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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