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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
    (* m(Cn'@i`"0  
    Demo for program"RP Fiber Power": thulium-doped fiber laser, H5Rn.n(|  
    pumped at 790 nm. Across-relaxation process allows for efficient g|PVOY+|^  
    population of theupper laser level. ~mtL\!vaM  
    *)            !(*  *)注释语句 xOjCF&W  
    D'>yu"  
    diagram shown: 1,2,3,4,5  !指定输出图表 MdWT[  
    ; 1: "Powersvs. Position"     !分号是注释;光纤长度对功率的影响 ".qh]RVjV  
    ; 2:"Variation of the Pump Power"  !泵浦光功率变化对信号输出功率的影响 qPpC)6-Q  
    ; 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 EY(@R2~#J  
    ; 4:"Transverse Profiles"             !横向分布,横坐标为半径位置 ti'a^(  
    ; 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 X.,1SYG[  
    \)ac,i@fy  
    include"Units.inc"         !读取“Units.inc”文件中内容 \HDRr*KO  
    E#_TX3B   
    include"Tm-silicate.inc"    !读取光谱数据 gU Cv#:  
    G1Cn[F;e  
    ; Basic fiberparameters:    !定义基本光纤参数 #Vanw!  
    L_f := 4 { fiberlength }      !光纤长度 r}P{opn$t  
    No_z_steps := 50 {no steps along the fiber } !光纤步长,大括号{ }是注释,相当于备注 Pb.-Z@  
    r_co := 6 um { coreradius }                !纤芯半径 Z8Fbx+~"  
    N_Tm := 100e24 { Tmdoping concentration }  !纤芯Tm离子掺杂浓度 ">kf X1LT  
    er}/~@JJ  
    ; Parameters of thechannels:                !定义光信道  _tN"<9v.  
    l_p := 790 nm {pump wavelength }                !泵浦光波长790nm K ^1bR(a  
    dir_p := forward {pump direction (forward or backward) }   !前向泵浦 ~) }npS;  
    P_pump_in := 5 {input pump power }                    !输入泵浦功率5W z@cL<.0CE  
    w_p := 50 um {radius of pump cladding }               !包层泵浦相应的半径 50um 38%]G Q  
    I_p(r) := (r <=w_p) { pump intensity profile }          !泵浦光强度分布 ~l-Q0wg  
    loss_p := 0 {parasitic losses of pump wave }           !泵浦光寄生损耗为0 fw_V'l#\  
    8 @!/%"Kt2  
    l_s := 1940 nm {signal wavelength }                   !信号光波长1940nm jd=k[Yqr  
    w_s := 7 um                          !信号光的半径 R{3f5**0  
    I_s(r) := exp(-2 *(r / w_s)^2)            !信号光的高斯强度分布 `7Ni bZX0  
    loss_s := 0                            !信号光寄生损耗为0 LZyUlz  
    '1=t{Rw  
    R_oc := 0.70 {output coupler reflectivity (right side) }      !输出耦合反射率 bzmT.!  
    AFl]w'=  
    ; 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 ]]+wDhxH  
    calc K!k,]90Ko  
      begin r9@W8](\  
        global allow all;                   !声明全局变量 u|=_!$8  
        set_fiber(L_f, No_z_steps, '');        !光纤参数 ZYrXav<  
        add_ring(r_co, N_Tm); rU5gQq;  
        def_ionsystem();              !光谱数据函数 B[Uvj~g  
        pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  !泵浦光信道 F`U%xn,  
        signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      !前向信号光信道 ^l ~i>:V  
        signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    !后向信号光信道 R1X9  
        set_R(signal_fw, 1, R_oc);                                 !设置反射率函数 f>5{SoM  
        finish_fiber();                                   1Af~6jz  
      end; j"/i+r{"E  
    wa W2$9O  
    ; Display someoutputs in the Output window (on the right side): !在Output aera区域显示输出 :=^JHE{  
    show "Outputpowers:"                                   !输出字符串Output powers: ]~)FMWQz-  
    show"pump:     ", P_out(pump):d3:"W"  !输出字符串pump:和计算值(格式为3个有效数字,单位W) zO2Z\E'% .  
    show"signal:   ",P_out(signal_fw):d3:"W" !输出字符串signal:和计算值(格式为3个有效数字,单位W) r<Ll>R  
    ge[f/"u  
    JMpjiB,A}  
    ; ------------- YQiTx)_  
    diagram 1:                   !输出图表1 mTW0_!.  
    3*3WO,9  
    "Powers vs.Position"          !图表名称 5Y"lr Y38  
    g% #" 5Kr  
    x: 0, L_f                      !命令x: 定义x坐标范围 xRJv_=dT  
    "position infiber (m)", @x      !x轴标签;@x 指示这些字符串沿坐标轴放置 Txfu%'2)e  
    y: 0, 15                      !命令y: 定义y坐标范围 WtFv"$V  
    y2: 0, 100                    !命令y2: 定义第二个y坐标范围 "MKgU[t  
    frame          !frame改变坐标系的设置 q/?#+d  
    legpos 600, 500  !图行在图表窗口中的位置(相对于左上角而言) ;4Y@xS2M  
    hx             !平行于x方向网格 `pE~M05  
    hy              !平行于y方向网格 ;c_X ^"d  
    n!&DLB1z  
    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 8k]'P*9ulz  
      color = red,  !图形颜色 'd^U!l  
      width = 3,   !width线条宽度 r@H<@Vuc  
      "pump"       !相应的文本字符串标签 (+38z)f  
    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 y|nMCkuX  
      color = blue,     Xp{+){Iu  
      width = 3, b"t!nfgo  
      "fw signal" Ja| ! fT  
    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  "C B*  
      color = blue, WsTbqR)W%  
      style = fdashed, T#Qn\ 8  
      width = 3, eR D?O  
      "bw signal" vL`wn=  
    A}FEM[2  
    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 OnC|9  
      yscale = 2,            !第二个y轴的缩放比例 f:GZb?Wyd  
      color = magenta, B8'" ^a^&-  
      width = 3, :z56!qU  
      style = fdashed, KO<Yc`Fs  
      "n2 (%, right scale)" }L{en  
    SgHLs  
    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 9Y- Sqk+  
      yscale = 2, =GTltFqI1  
      color = red, 4T`u?T]  
      width = 3, @3K)VjY7  
      style = fdashed, bBc<yaN  
      "n3 (%, right scale)" p}hOkx4R\  
    p-GlGEt_X  
    *T*=~Y4kE  
    ; ------------- @H"~/m_o  
    diagram 2:                    !输出图表2 3 ~0Z.!O  
    |Ma"B4  
    "Variation ofthe Pump Power" Pq>r|/~_  
    PCH&eTKN  
    x: 0, 10 ~&[Wqn@MZ  
    "pump inputpower (W)", @x .vj`[?T  
    y: 0, 10 }a,j1r_Hl&  
    y2: 0, 100 }xn\.M:ic  
    frame + O=wKsGD  
    hx 7JD jJQy  
    hy ~EG`[cv  
    legpos 150, 150 I#zrz3WU  
    fD  
    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 x1W<r)A )r  
      step = 5, -~~"}u  
      color = blue, ~&4Hc%*IB  
      width = 3, Kgbgp mW  
      "signal output power (W, leftscale)",     !相应的文本字符串标签 jwgXq(  
      finish set_P_in(pump, P_pump_in) )d!,,o  
    3xWeN#T0  
    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 fHCLsI  
      yscale = 2, ,o& &d.  
      step = 5, \Y_2Z /  
      color = magenta, r j#K5/df  
      width = 3, %Wkvo-rOq  
      "population of level 2 (%, rightscale)", 8rAOs\ys  
      finish set_P_in(pump, P_pump_in) 8bLA6qmM\  
    +pZ, RW.D  
    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 ME7jF9d  
      yscale = 2, (ec?_N0=  
      step = 5, XZYpU\K  
      color = red, s]Nh9h  
      width = 3, $73 7oV<  
      "population of level 3 (%, rightscale)", vyP3]+n  
      finish set_P_in(pump, P_pump_in) y8'WR-;  
    >KmOTM< {  
    obKWnet  
    ; ------------- ?F1NZA[%t  
    diagram 3:                         !输出图表3 ?2zVWZ  
    x*Y&s<  
    "Variation ofthe Fiber Length" ZdJwy%  
    ;,![Lar5L  
    x: 0.1, 5 ~CgKU8  
    "fiber length(m)", @x !qsk;Vk7Z  
    y: 0, 10 D0 Yl?LU3  
    "opticalpowers (W)", @y Gx ci  
    frame \Y&*sfQ  
    hx u[q1]]   
    hy o^hI\9  
    ^m.QW*  
    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 $_CE!_G&)  
      step = 20,             dqMt6b\}  
      color = blue, D 's'LspQ  
      width = 3, 9otA5I^v  
      "signal output" p\T9 q  
    /4J2F9:f  
    ;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 bCr) 3,  
       step = 20, color = red, width = 3,"residual pump" ,ef"S r  
    2?9 FFlX  
    ! set_L(L_f) {restore the original fiber length } 2\h}6DGx2  
    mX3~rK>@~  
    M3c!SXx\  
    ; ------------- F(c~D0  
    diagram 4:                                  !输出图表4 eIBHAdU+g/  
    8.FBgZh*  
    "TransverseProfiles" Pw i6Ly`  
    {j i;~9'Q  
    I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) hfT HP  
    35I y\  
    x: 0, 1.4 * r_co /um 2c`m8EaJ  
    "radialposition (µm)", @x VN`T:!&  
    y: 0, 1.2 * I_max *cm^2 p?(w !O  
    "intensity (W/ cm&sup2;)", @y |g<1n  
    y2: 0, 1.3 * N_Tm [ lZo'o  
    frame 7Gb1[3  
    hx AoB~ZWq  
    hy gZ%wm Y  
    #U45;idp  
    f: N_dop(1, x * um,0),      !掺杂浓度的径向分布 r2A%.bL#  
      yscale = 2, dzJ\+ @4  
      color = gray, PhF.\W b  
      width = 3, $MD|YW5  
      maxconnect = 1, PkA_uDhw  
      "N_dop (right scale)" XOgl> 1O  
    ~wG.'d]  
    f: I(pump, -1, x *um, 0) * cm^2,    !泵浦光沿光纤径向的强度分布 par| j]  
      color = red, -;pZC}Nd3  
      maxconnect = 1,           !限制图形区域高度,修正为100%的高度 V#8]io  
      width = 3, ^DVj_&~  
      "pump" "{>I5<:t  
    0I_A$Z,x  
    f: I(signal_fw, -1,x * um, 0) * cm^2,  !信号光沿光纤径向的强度分布 w{uq y]  
      color = blue, bl@0+NiM  
      maxconnect = 1, /N6sH!w  
      width = 3, ~XAtt\WS  
      "signal" ]"bkB+I  
    `L p3snS  
    T \%{zz_(  
    ; ------------- %qA@)u53  
    diagram 5:                                  !输出图表5 JTbg8b  
    &"GHD{ix  
    "TransitionCross-sections" ^Q!qJav  
    Kq!E<|yM  
    I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) cx%[hM09  
    [pMJ9 d$  
    x: 1450, 2050 YT!QY@qw  
    "wavelength(nm)", @x =f'MiU!p6  
    y: 0, 0.6 <hlH@[7!  
    "cross-sections(1e-24 m&sup2;)", @y iC-WQkQY  
    frame K..L8#SC  
    hx DVCO( fz  
    hy Mda~@)7$  
    5Pmmt&#/Z  
    f: s12_Tm(x * nm) /1e-24,      !Tm3+吸收截面与波长的关系 XE8~R5  
      color = red, r,}U-S.w  
      width = 3, qh}M!p2  
      "absorption" v%Rc wVt|  
    f: s21_Tm(x * nm) /1e-24,  !Tm3+发射截面与波长的关系 dm3cQ<0  
      color = blue, Mf0!-bu  
      width = 3, K07SbL7g!p  
      "emission" OiPE,sv  
    BM bT:)%  
     
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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