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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
    (*  ^_%kE%I  
    Demo for program"RP Fiber Power": thulium-doped fiber laser, M!tXN&V]  
    pumped at 790 nm. Across-relaxation process allows for efficient Qo1eXMW  
    population of theupper laser level. f7'q-  
    *)            !(*  *)注释语句 ]Bm>-*@0N  
    ;9}pOzF1q  
    diagram shown: 1,2,3,4,5  !指定输出图表 6O22P?v  
    ; 1: "Powersvs. Position"     !分号是注释;光纤长度对功率的影响 | /|  
    ; 2:"Variation of the Pump Power"  !泵浦光功率变化对信号输出功率的影响 A;O~#Chvd  
    ; 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 Cua%1]"4w  
    ; 4:"Transverse Profiles"             !横向分布,横坐标为半径位置 U7DCx=B  
    ; 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 fI7j):h;  
    XJ0oS32_wK  
    include"Units.inc"         !读取“Units.inc”文件中内容 o8Z[+;  
    q;:6_Qr  
    include"Tm-silicate.inc"    !读取光谱数据 D r~=o%  
    PccB]  
    ; Basic fiberparameters:    !定义基本光纤参数 pMJ1v  
    L_f := 4 { fiberlength }      !光纤长度 Na\WZSu'"  
    No_z_steps := 50 {no steps along the fiber } !光纤步长,大括号{ }是注释,相当于备注 NcAp_q? 4  
    r_co := 6 um { coreradius }                !纤芯半径 Hku!bJ  
    N_Tm := 100e24 { Tmdoping concentration }  !纤芯Tm离子掺杂浓度 {q3H5csFq  
    SgEBh  
    ; Parameters of thechannels:                !定义光信道 R+~cl;#G6  
    l_p := 790 nm {pump wavelength }                !泵浦光波长790nm vw)7 !/#  
    dir_p := forward {pump direction (forward or backward) }   !前向泵浦 :SsUdIX;P  
    P_pump_in := 5 {input pump power }                    !输入泵浦功率5W !8@*F  
    w_p := 50 um {radius of pump cladding }               !包层泵浦相应的半径 50um er.CDKD%L  
    I_p(r) := (r <=w_p) { pump intensity profile }          !泵浦光强度分布 wfjc/u9W6R  
    loss_p := 0 {parasitic losses of pump wave }           !泵浦光寄生损耗为0 l6u&5[C  
    HSIvWhg?p  
    l_s := 1940 nm {signal wavelength }                   !信号光波长1940nm _7D_72  
    w_s := 7 um                          !信号光的半径 [,aqQ6S  
    I_s(r) := exp(-2 *(r / w_s)^2)            !信号光的高斯强度分布 RuG-{NF{F  
    loss_s := 0                            !信号光寄生损耗为0 P(>(K{v  
    -OYDe@Wb]  
    R_oc := 0.70 {output coupler reflectivity (right side) }      !输出耦合反射率 M@thI%lR  
    b`_w])Y@  
    ; 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 e\b`n}nC  
    calc =q"eU=9  
      begin ?K@t0a   
        global allow all;                   !声明全局变量 SxjCwX">  
        set_fiber(L_f, No_z_steps, '');        !光纤参数 vLO&Lpv  
        add_ring(r_co, N_Tm); !%Y~~'5 h  
        def_ionsystem();              !光谱数据函数 mga6[E<  
        pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  !泵浦光信道 i%#$*  
        signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      !前向信号光信道 \NqEw@91B  
        signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    !后向信号光信道 - /c7n F  
        set_R(signal_fw, 1, R_oc);                                 !设置反射率函数 SjdZyJa  
        finish_fiber();                                   .!}hhiF,Z  
      end; &l}?v@@+_  
    ? &zQa xD  
    ; Display someoutputs in the Output window (on the right side): !在Output aera区域显示输出 XW L^  
    show "Outputpowers:"                                   !输出字符串Output powers: U4Nh  
    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) !eJCM`cp  
    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) MbXq`%  
    r Db>&s3  
    jvzBh-!  
    ; ------------- zEw >SP1,  
    diagram 1:                   !输出图表1 {?{U,&  
    PzY)"]g  
    "Powers vs.Position"          !图表名称 n$2RCQ  
    w.N,)]h  
    x: 0, L_f                      !命令x: 定义x坐标范围 #yc L'T`X%  
    "position infiber (m)", @x      !x轴标签;@x 指示这些字符串沿坐标轴放置 9zgNjjCl]  
    y: 0, 15                      !命令y: 定义y坐标范围 :o"8MZp  
    y2: 0, 100                    !命令y2: 定义第二个y坐标范围 )uP[!LV[e  
    frame          !frame改变坐标系的设置 L<(VG{)Z  
    legpos 600, 500  !图行在图表窗口中的位置(相对于左上角而言) P.sgRsL  
    hx             !平行于x方向网格 9YF$CXonE=  
    hy              !平行于y方向网格 ~k'V*ERNSj  
    PG,U6c #  
    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 {Ts:ZI+ 8d  
      color = red,  !图形颜色 CQODXB^  
      width = 3,   !width线条宽度 YYRT.U'  
      "pump"       !相应的文本字符串标签 6(sIYZ2yq  
    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"xWw/Ec  
      color = blue,     Y(GN4@`S  
      width = 3, J< JBdk  
      "fw signal" _ ^7|!(Sz  
    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 Wn!G.(Jq  
      color = blue, -PAF p3w\y  
      style = fdashed, fY2wDD  
      width = 3, sXl ??UGe  
      "bw signal" 8o)L,{yl  
    m%QqmTH  
    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 H]&!'\aUz  
      yscale = 2,            !第二个y轴的缩放比例 JatHSW7j9  
      color = magenta, ;Mj002.\G  
      width = 3, R V!o4"\]  
      style = fdashed, !W1eUY  
      "n2 (%, right scale)" Uq X1E  
    SZVV40w  
    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 <?$kI>Ot  
      yscale = 2, F ,G,b  
      color = red, rbk<z\pc  
      width = 3, R9. HD?H@  
      style = fdashed, ZHy><=2  
      "n3 (%, right scale)" ^i<}]c_|f  
    >zL |8f  
    CKTrZxR"  
    ; ------------- p27p~b&  
    diagram 2:                    !输出图表2 ma}}Sn)Q  
    9y"TDo  
    "Variation ofthe Pump Power" Ku3!*n_\  
    ;.Zh,cU  
    x: 0, 10 jXEGSn  
    "pump inputpower (W)", @x =aow d4 t  
    y: 0, 10 ) Ypz!  
    y2: 0, 100 k)E;(  
    frame K[ ?R[  
    hx tE!'dpG5)  
    hy \7E`QY4  
    legpos 150, 150 ~eo^`4O{{  
    |vy]8?Ak  
    f: (set_P_in(pump, x);P_out(signal_fw)), !set_P_in(pump,x)改变泵浦信道功率;P_out(signal_fw)输出前向信号光 IYNMU\s  
      step = 5, 0|2%#  E  
      color = blue, jA2ofC  
      width = 3, ci7~KewJ*  
      "signal output power (W, leftscale)",     !相应的文本字符串标签 ?@a$!_  
      finish set_P_in(pump, P_pump_in) F7 uhuqA]N  
    'P/taEi=R  
    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 (G5T%[/U  
      yscale = 2, Y}/jR6hK  
      step = 5, ?1m ,SK  
      color = magenta, Am7| /  
      width = 3, silp<13HN  
      "population of level 2 (%, rightscale)", 7l}~4dm2J  
      finish set_P_in(pump, P_pump_in) d]k='  
    I2*oTUSik  
    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 oWcACs3fB  
      yscale = 2, zjoo{IH}  
      step = 5, L; C|ow^c  
      color = red, 9`&77+|;e  
      width = 3, ^@ UjQ9[>  
      "population of level 3 (%, rightscale)", {gIEZ{  
      finish set_P_in(pump, P_pump_in) sUda   
    ocP*\NR  
    wrK#lh2  
    ; ------------- RQ5P}A 3H  
    diagram 3:                         !输出图表3 >'0lw+a  
    8g5.7{ky  
    "Variation ofthe Fiber Length" E<a.LW@  
    !>|`ly$6  
    x: 0.1, 5 Et0&E  
    "fiber length(m)", @x i-V0Lm/  
    y: 0, 10 ^=#!D[xj>  
    "opticalpowers (W)", @y O<iI  
    frame / T#o<D  
    hx "sIN86pCs  
    hy Eb7}$Ji\  
    Jh(mbD  
    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 wKrdcWI,Z  
      step = 20,             W[ "HDR  
      color = blue, T=yCN#cqQ`  
      width = 3, 0&o WfTg  
      "signal output" .6I%64m  
    U:Fpj~E_w  
    ;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 u dUXc6U  
       step = 20, color = red, width = 3,"residual pump" q\G{]dz?R  
    lzI/\%  
    ! set_L(L_f) {restore the original fiber length } ^B6`e^ <  
    .n=xbx:=  
    R_~F6O^EO  
    ; ------------- Z0z)  
    diagram 4:                                  !输出图表4 SOYDp;j  
    'iDu0LX  
    "TransverseProfiles" *q[^Q'jnN  
    %$\}z( G  
    I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) nO%<;-=u\  
    u4xA'X'~R  
    x: 0, 1.4 * r_co /um 3_@G{O)e  
    "radialposition (µm)", @x td`wNy\  
    y: 0, 1.2 * I_max *cm^2 J b|mXNcL  
    "intensity (W/ cm&sup2;)", @y (F_7%!g1d  
    y2: 0, 1.3 * N_Tm 0YHYxn  
    frame ~JT lPU'  
    hx V?o&])?[  
    hy $&NbLjeS  
    hXBqz9  
    f: N_dop(1, x * um,0),      !掺杂浓度的径向分布 {bxhH)a'  
      yscale = 2, 2@4MC`&  
      color = gray, ir"* iL=  
      width = 3, Z^C!RSQ  
      maxconnect = 1, 2GUhV*TN  
      "N_dop (right scale)" MQhYJ01i  
    yW'BrTw  
    f: I(pump, -1, x *um, 0) * cm^2,    !泵浦光沿光纤径向的强度分布 8F.(]@NY  
      color = red, Psg +\14  
      maxconnect = 1,           !限制图形区域高度,修正为100%的高度 @$_rEdwi  
      width = 3, ta2z  
      "pump" 7?*~oVZW  
    ,\Z8*Jr3Q  
    f: I(signal_fw, -1,x * um, 0) * cm^2,  !信号光沿光纤径向的强度分布 UYl JO{|a  
      color = blue, "F04c|oR<X  
      maxconnect = 1,  z, :+Oc  
      width = 3, l ,ZzB,"  
      "signal"  ; \Y-  
    )bF)RL Z  
    ye9QTK6$,  
    ; ------------- {_+>"esc  
    diagram 5:                                  !输出图表5 /o~ @VF:  
    CA'hvXb.  
    "TransitionCross-sections" E]D4']  
    cC*zj \O  
    I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) AJdlqbd'+  
    h%4 ~0  
    x: 1450, 2050 <%T%NjNPQ  
    "wavelength(nm)", @x zkw0jX~  
    y: 0, 0.6 |J @|  
    "cross-sections(1e-24 m&sup2;)", @y <PH3gyC  
    frame P1vF{e  
    hx ZhxfI?i)l  
    hy Va&KIHw  
    uBV^nUjS"m  
    f: s12_Tm(x * nm) /1e-24,      !Tm3+吸收截面与波长的关系 9QO!vx  
      color = red, ~W5>;6f\  
      width = 3, gqKC4'G0  
      "absorption" Z.Lx^h+U  
    f: s21_Tm(x * nm) /1e-24,  !Tm3+发射截面与波长的关系 ant-\w> }  
      color = blue, V~tu<"%  
      width = 3, .oB'ttF1  
      "emission" \:18Uoe7  
    }6b7a1p  
     
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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