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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
    (* G `B=:s]  
    Demo for program"RP Fiber Power": thulium-doped fiber laser, yS[HYq  
    pumped at 790 nm. Across-relaxation process allows for efficient _\= /~>Xl  
    population of theupper laser level. 8DbP$Wwi  
    *)            !(*  *)注释语句 +qqCk  
    :S!!J*0  
    diagram shown: 1,2,3,4,5  !指定输出图表 `0w!&  
    ; 1: "Powersvs. Position"     !分号是注释;光纤长度对功率的影响 z(2G"}  
    ; 2:"Variation of the Pump Power"  !泵浦光功率变化对信号输出功率的影响 ,OP\^  
    ; 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 N=~DSsw  
    ; 4:"Transverse Profiles"             !横向分布,横坐标为半径位置 d>c`hQ(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 i }Zz[b  
    U!RIeC  
    include"Units.inc"         !读取“Units.inc”文件中内容 =}u?1~V  
    A{T> Aac  
    include"Tm-silicate.inc"    !读取光谱数据 0;*[}M]Z  
    Ox)_7A  
    ; Basic fiberparameters:    !定义基本光纤参数 %.Kr`#lCr  
    L_f := 4 { fiberlength }      !光纤长度 lL5*l,)To  
    No_z_steps := 50 {no steps along the fiber } !光纤步长,大括号{ }是注释,相当于备注 qzLD  
    r_co := 6 um { coreradius }                !纤芯半径 s$0dLEa9  
    N_Tm := 100e24 { Tmdoping concentration }  !纤芯Tm离子掺杂浓度 9;`hJ!r  
    7uF @Xh  
    ; Parameters of thechannels:                !定义光信道 -~H "zu`  
    l_p := 790 nm {pump wavelength }                !泵浦光波长790nm / T_v8 {D  
    dir_p := forward {pump direction (forward or backward) }   !前向泵浦 9y} J|z  
    P_pump_in := 5 {input pump power }                    !输入泵浦功率5W BGOS(  
    w_p := 50 um {radius of pump cladding }               !包层泵浦相应的半径 50um 1]A\@(  
    I_p(r) := (r <=w_p) { pump intensity profile }          !泵浦光强度分布 Zw%:mZN  
    loss_p := 0 {parasitic losses of pump wave }           !泵浦光寄生损耗为0 =*>.z@WQ  
    %zDi|WZ  
    l_s := 1940 nm {signal wavelength }                   !信号光波长1940nm fjuPGg~  
    w_s := 7 um                          !信号光的半径 vkM_a}%<  
    I_s(r) := exp(-2 *(r / w_s)^2)            !信号光的高斯强度分布 6{g&9~V  
    loss_s := 0                            !信号光寄生损耗为0 wsc=6/#u  
    U^DR'X=  
    R_oc := 0.70 {output coupler reflectivity (right side) }      !输出耦合反射率 i1]}Q$  
    Z[,,(M  
    ; 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 AXnKhYlu  
    calc %rEP.T\i  
      begin /c4$m3?]  
        global allow all;                   !声明全局变量 Ywcgt|  
        set_fiber(L_f, No_z_steps, '');        !光纤参数 Z*v`kl  
        add_ring(r_co, N_Tm); |Vu`-L'Jz  
        def_ionsystem();              !光谱数据函数 iuM ,a F  
        pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  !泵浦光信道 pE0@m-p  
        signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      !前向信号光信道 Imyw-8/;  
        signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    !后向信号光信道 (hRg0Z=  
        set_R(signal_fw, 1, R_oc);                                 !设置反射率函数 %j{*`}  
        finish_fiber();                                   *<?KOM  
      end; S T4[d'|j  
    R+/kx#^  
    ; Display someoutputs in the Output window (on the right side): !在Output aera区域显示输出 [<Mls@?  
    show "Outputpowers:"                                   !输出字符串Output powers: ~4] J'E >  
    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) _=cuOo"!  
    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) qS ggZ0*  
    zY-?Bv_D  
    9 OlJC[  
    ; ------------- 0j}@lOt(  
    diagram 1:                   !输出图表1 ,XN4Iy#BZl  
    {7 ](-  
    "Powers vs.Position"          !图表名称 58`Dcx,yJ  
    $H/: -v  
    x: 0, L_f                      !命令x: 定义x坐标范围 P$@:T[}v  
    "position infiber (m)", @x      !x轴标签;@x 指示这些字符串沿坐标轴放置 ^$rqyWZYp  
    y: 0, 15                      !命令y: 定义y坐标范围 :SZi4:4-J8  
    y2: 0, 100                    !命令y2: 定义第二个y坐标范围 "1p, r&}  
    frame          !frame改变坐标系的设置 OL@$RTh  
    legpos 600, 500  !图行在图表窗口中的位置(相对于左上角而言) 9tmnx')_  
    hx             !平行于x方向网格 c s:E^  
    hy              !平行于y方向网格 3b`#)y^y?%  
    "=$uv  
    f: P(pump, x),    !命令f: 定义函数图;P(pump, x)函数是计算x位置处的泵浦光功率 bJ eF1LjS  
      color = red,  !图形颜色 >yLdrf  
      width = 3,   !width线条宽度 ;D%H}+Z  
      "pump"       !相应的文本字符串标签 3S%/>)k  
    f: P(signal_fw, x),  !P(signal_fw ,x) 函数是计算x位置处的前向信号光功率 SR<W3a\  
      color = blue,     i|S/g.r  
      width = 3, F9r|EU#;  
      "fw signal" uw@-.N^  
    f: P(signal_bw, x),   !P(signal_bw ,x) 函数是计算x位置处的后向信号光功率 tQTjqy{K  
      color = blue, ':f,RG  
      style = fdashed, H5CL0#I  
      width = 3, iWkC: fQz  
      "bw signal" oTTE<Ct [  
    Ac}5,  
    f: 100 * n(x, 2),    !n(x ,2) 函数是计算x位置处激活粒子数在能级2上的占比 ~Ds3 -#mMy  
      yscale = 2,            !第二个y轴的缩放比例 dkQP.Tj$i  
      color = magenta, `@So6%3Y|  
      width = 3, ]v+yeGIKS  
      style = fdashed, /38XaKc{6  
      "n2 (%, right scale)" QQ %W3D @  
    Yq{R*HO  
    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 }z2[w@M  
      yscale = 2, Q4g69IE  
      color = red, FB3}M)G>M  
      width = 3, MaF4lFmS  
      style = fdashed, E[FE-{B#  
      "n3 (%, right scale)" 1`~.!yd8(  
    L3s"L.G  
    hK %FpGYA  
    ; ------------- ;RMevVw|  
    diagram 2:                    !输出图表2 m.lzkS]P  
    NuXII-  
    "Variation ofthe Pump Power" o76{;Bl\O  
    :xY9eq=  
    x: 0, 10 ghTue*A  
    "pump inputpower (W)", @x Fnd_\`9{  
    y: 0, 10 f`[E^ zj  
    y2: 0, 100 F><ficT  
    frame ezS@`_pR;  
    hx 9vCCE[9  
    hy w/9%C(w6  
    legpos 150, 150 HI[Pf%${  
    .kB!',v\  
    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 h&rZR`g  
      step = 5, 'k[vcnSz\/  
      color = blue, 7}pg7EF3z  
      width = 3, x]IJ;  
      "signal output power (W, leftscale)",     !相应的文本字符串标签 s|k&@jH)  
      finish set_P_in(pump, P_pump_in) zu 7Fq]zD  
    AP ]`'C  
    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 1I40N[PE)  
      yscale = 2, U&#`5u6'j  
      step = 5, bas1(/|S  
      color = magenta, Zb:Z,O(vn  
      width = 3, ryb81.|  
      "population of level 2 (%, rightscale)", |<MSV KW  
      finish set_P_in(pump, P_pump_in) /. >%IcK  
    dfh 1^Go  
    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 ,}NTV ~  
      yscale = 2, bL5u;iy)  
      step = 5, Q(x/&]7=V  
      color = red, '1~;^rU  
      width = 3, F 1l8jB\  
      "population of level 3 (%, rightscale)", s@ 6Jz\<E  
      finish set_P_in(pump, P_pump_in) @gw8r[  
    E;An':j  
    M(n@ytz  
    ; ------------- L-%'jR  
    diagram 3:                         !输出图表3 5kojh _\  
    8Y:x+v5  
    "Variation ofthe Fiber Length" *U`R<mV\  
    3PlIn0+LX  
    x: 0.1, 5 7}`FXB  
    "fiber length(m)", @x yet ~  
    y: 0, 10 \9`.jB~<  
    "opticalpowers (W)", @y $)d34JM  
    frame #aiI]'  
    hx l hST%3Ld  
    hy .hnq>R\  
    45OAJ?N  
    f: (set_L(x);P_out(signal_fw)),     !改变光纤长度对信号光输出功率的影响 ? 51i0~O=  
      step = 20,             6h0}ZM  
      color = blue, R`B} T<*  
      width = 3, <kWkc|z BY  
      "signal output" 8s %YudW  
    vin3 i&k  
    ;f: (set_L(x);P_out(pump)),                     !改变光纤长度对泵浦信号输出功率的影响 unKgOvtj  
       step = 20, color = red, width = 3,"residual pump" e0j4t-lL  
    dnh~An 9  
    ! set_L(L_f) {restore the original fiber length } 9SJSUv:@  
    }_('3C,Ba  
    {qOqtkj  
    ; ------------- }(,{^".[}  
    diagram 4:                                  !输出图表4 Z*-a=u%gl'  
    9'@G7*Yn  
    "TransverseProfiles" {WQ6=wGpS  
    HJP~ lg  
    I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) S#<y_w%  
    k|{ 4"4r  
    x: 0, 1.4 * r_co /um "oyBF CW  
    "radialposition (µm)", @x cDK)zD  
    y: 0, 1.2 * I_max *cm^2 #Tt*NU  
    "intensity (W/ cm&sup2;)", @y 4Z5;y[k(  
    y2: 0, 1.3 * N_Tm %F^,6y  
    frame mkrVeBp  
    hx lD-2 5~YV  
    hy .Lu3LVS  
    s+z5"3'n  
    f: N_dop(1, x * um,0),      !掺杂浓度的径向分布 \A)Pcc}7  
      yscale = 2, oB~V~c}8x  
      color = gray, Et0)6^-v  
      width = 3, n{&;@mgI  
      maxconnect = 1, `r-3"or/$  
      "N_dop (right scale)" `zB bB^\`W  
    GLX{EG9Z  
    f: I(pump, -1, x *um, 0) * cm^2,    !泵浦光沿光纤径向的强度分布 IAmZ_2  
      color = red, E0yx @Vx  
      maxconnect = 1,           !限制图形区域高度,修正为100%的高度 CGkx_E]  
      width = 3, /Z,hQ>/  
      "pump" S _ UAz  
    \Hf/8!q  
    f: I(signal_fw, -1,x * um, 0) * cm^2,  !信号光沿光纤径向的强度分布 Bf6i{`!G  
      color = blue, ;tF&r1  
      maxconnect = 1, Nwe-7/Q  
      width = 3, ZKq#PB/.  
      "signal" M'F<1(  
    &]shBvzl^  
    mx UyD[|  
    ; ------------- adAdX;@e`  
    diagram 5:                                  !输出图表5 zqBzataR:  
    /J&ks>St  
    "TransitionCross-sections" `j!_tE`  
    hQlyqTP|2  
    I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) E!BzE_|i  
    uG +ZR: _  
    x: 1450, 2050 &flRrJ  
    "wavelength(nm)", @x </1]eDnU  
    y: 0, 0.6 E|+<m!  
    "cross-sections(1e-24 m&sup2;)", @y {cb<9Fii  
    frame Jb^{o+s53  
    hx ^!0z+M:>^  
    hy M ?AX:0  
    /oLY\>pD  
    f: s12_Tm(x * nm) /1e-24,      !Tm3+吸收截面与波长的关系 N u\<Xr8  
      color = red, }`%ks  
      width = 3, C'R6mz%Q?  
      "absorption" 1uCF9P ai  
    f: s21_Tm(x * nm) /1e-24,  !Tm3+发射截面与波长的关系 3HW&\:q5'M  
      color = blue, ts}OE  
      width = 3, 3vjOfr`  
      "emission" Q\T?t  
    DvB{N`COd  
     
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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