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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
    (* NBl __q  
    Demo for program"RP Fiber Power": thulium-doped fiber laser, ;K:8#XuV  
    pumped at 790 nm. Across-relaxation process allows for efficient |dadH7  
    population of theupper laser level. (fo Bp  
    *)            !(*  *)注释语句 /&ygiH{^  
    U/qE4u1J6M  
    diagram shown: 1,2,3,4,5  !指定输出图表 gdj^df+2F  
    ; 1: "Powersvs. Position"     !分号是注释;光纤长度对功率的影响 UEzi*"-v2  
    ; 2:"Variation of the Pump Power"  !泵浦光功率变化对信号输出功率的影响 [6(Iwz?  
    ; 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 \|Dei);k  
    ; 4:"Transverse Profiles"             !横向分布,横坐标为半径位置 u@FsLHn  
    ; 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 6xgv:,  
    EEf ]u7  
    include"Units.inc"         !读取“Units.inc”文件中内容 + C7T]&5s  
    -+U/Lrt>8  
    include"Tm-silicate.inc"    !读取光谱数据 (*l2('e#@  
    < 8(?7QI  
    ; Basic fiberparameters:    !定义基本光纤参数 u}H$-$jE  
    L_f := 4 { fiberlength }      !光纤长度 k3@HI|  
    No_z_steps := 50 {no steps along the fiber } !光纤步长,大括号{ }是注释,相当于备注 0o&}mKe  
    r_co := 6 um { coreradius }                !纤芯半径 #\If]w*j  
    N_Tm := 100e24 { Tmdoping concentration }  !纤芯Tm离子掺杂浓度 >HkhAJhW  
    =;c_} VY  
    ; Parameters of thechannels:                !定义光信道 hhR aJ  
    l_p := 790 nm {pump wavelength }                !泵浦光波长790nm evl -V>   
    dir_p := forward {pump direction (forward or backward) }   !前向泵浦 E1>/R  
    P_pump_in := 5 {input pump power }                    !输入泵浦功率5W :_d3//|  
    w_p := 50 um {radius of pump cladding }               !包层泵浦相应的半径 50um ]"x\=A  
    I_p(r) := (r <=w_p) { pump intensity profile }          !泵浦光强度分布 "2HY5 AE  
    loss_p := 0 {parasitic losses of pump wave }           !泵浦光寄生损耗为0 q"aPJ0ni'  
    +AQDD4bu  
    l_s := 1940 nm {signal wavelength }                   !信号光波长1940nm Gm=>!.p  
    w_s := 7 um                          !信号光的半径 7$b?m6fmK  
    I_s(r) := exp(-2 *(r / w_s)^2)            !信号光的高斯强度分布 W$\X~Q'0  
    loss_s := 0                            !信号光寄生损耗为0 K^i"9D)A  
    M$CVQ>op:  
    R_oc := 0.70 {output coupler reflectivity (right side) }      !输出耦合反射率 `n-vjjG%#  
    +?N}Y{Y&  
    ; Function for defining themodel:   !定义模型函数,一定要有calc命令,否则函数只会被定义,但不会被执行 )}X5u%woV  
    calc 'm1.X-$V  
      begin |PM m?2^R  
        global allow all;                   !声明全局变量 rH}fLu8,;Q  
        set_fiber(L_f, No_z_steps, '');        !光纤参数 P%o44|[][  
        add_ring(r_co, N_Tm); A1JzW)B  
        def_ionsystem();              !光谱数据函数 Mz|L-62  
        pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  !泵浦光信道 ! sYf<  
        signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      !前向信号光信道 B7 "Fp  
        signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    !后向信号光信道 |"}4*V_*  
        set_R(signal_fw, 1, R_oc);                                 !设置反射率函数 YQ,tt<CQ  
        finish_fiber();                                   _Dq Qfc%  
      end; Lk(S2$)*  
    *)PG-$6X&  
    ; Display someoutputs in the Output window (on the right side): !在Output aera区域显示输出 y1(P<7:t?  
    show "Outputpowers:"                                   !输出字符串Output powers:   8Uj:  
    show"pump:     ", P_out(pump):d3:"W"  !输出字符串pump:和计算值(格式为3个有效数字,单位W) Ku%6$C!,  
    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) 3YTIH2z 5  
    rye)qp|  
    :Ee?K  
    ; ------------- G\/IM  
    diagram 1:                   !输出图表1 d/B*  
    9.Ap~Ay.  
    "Powers vs.Position"          !图表名称 3hJH(ToO  
    @6%gIsj<H  
    x: 0, L_f                      !命令x: 定义x坐标范围 IvSn>o  
    "position infiber (m)", @x      !x轴标签;@x 指示这些字符串沿坐标轴放置 Oc-u=K,B  
    y: 0, 15                      !命令y: 定义y坐标范围 S:s 3EM  
    y2: 0, 100                    !命令y2: 定义第二个y坐标范围 '?}R4w|)  
    frame          !frame改变坐标系的设置 i=da,W=0  
    legpos 600, 500  !图行在图表窗口中的位置(相对于左上角而言) (@?eLJlT  
    hx             !平行于x方向网格 6:RMU  
    hy              !平行于y方向网格 ;F,qS0lzE  
    V [4n'LcE  
    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 k|ip?O  
      color = red,  !图形颜色 {"4<To]z  
      width = 3,   !width线条宽度 2 zl~>3S  
      "pump"       !相应的文本字符串标签 %AgA -pBp  
    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 9UmBm#"  
      color = blue,     ;vUxO<cKFq  
      width = 3, z+6QZQk  
      "fw signal" D% @KRcp^b  
    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 =L16hDk o  
      color = blue, foyB{6q8  
      style = fdashed, A5+5J_)*  
      width = 3, DrFur(=T  
      "bw signal" FAd``9kRT  
    Gy^FrF   
    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 afy/K'~  
      yscale = 2,            !第二个y轴的缩放比例 >e_%M5 0  
      color = magenta, 0:PSt_33F  
      width = 3, SauHFl8?  
      style = fdashed, 9mm2Vps;  
      "n2 (%, right scale)" ^hysCc  
    Ge~,[If+  
    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 B<C&ay  
      yscale = 2, GMT or  
      color = red, c'~[!,[b<  
      width = 3, CjmV+%b4  
      style = fdashed, OgTSx  
      "n3 (%, right scale)" o]p#%B?mZ  
    <4sj@C  
    Ik-oI=>.  
    ; ------------- 59K}  
    diagram 2:                    !输出图表2 Rj&qh`  
     9^p32G  
    "Variation ofthe Pump Power" W7W3DBKtSm  
    uwId  
    x: 0, 10 a.CF9m5]c  
    "pump inputpower (W)", @x # hZQ>zcF  
    y: 0, 10 .5^a;`-+  
    y2: 0, 100 3~:0?Zuq  
    frame 4y1>  
    hx kI<Wvgo L  
    hy (`F|nG=X  
    legpos 150, 150 ?Oqzd$-  
    1ThwvF%Qo  
    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 )]tvwEo  
      step = 5, ,FY-d$3)  
      color = blue, yz8-&4YRNd  
      width = 3, )ib7K1GJ  
      "signal output power (W, leftscale)",     !相应的文本字符串标签 O%prD}x  
      finish set_P_in(pump, P_pump_in) {&0mK"z_  
    [jy0@Q9  
    f: (set_P_in(pump,x); 100 * n_av(2)),   !改变泵浦信号功率对能级2上激活粒子占比的影响 zw,-.fmM#  
      yscale = 2, F G3Sk!O6  
      step = 5, )7k&`?Mh  
      color = magenta, JxnuGkE0[#  
      width = 3, -E}>h[;qZ  
      "population of level 2 (%, rightscale)", d&5c_6oW  
      finish set_P_in(pump, P_pump_in) 8,_ -0_^$  
    hR!}u}ECd  
    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 T0YDfo  
      yscale = 2, TZ:34\u   
      step = 5, A3z/Bz4]:#  
      color = red, nW~$ (Qnd  
      width = 3, gA{'Q\  
      "population of level 3 (%, rightscale)", J"5jy$30'$  
      finish set_P_in(pump, P_pump_in) ENO? ;  
    wZ$ tJQO  
    abL/Y23 "  
    ; ------------- RZW$!tyI=  
    diagram 3:                         !输出图表3 amMjuyW  
    C1KfXC*|L  
    "Variation ofthe Fiber Length" qw5&Y$((  
    q Frt^+@  
    x: 0.1, 5 E(% XVr0W  
    "fiber length(m)", @x 6g}^Q?cpV#  
    y: 0, 10 \QliHm!  
    "opticalpowers (W)", @y <D~6v2$  
    frame gxI&f  
    hx ;]{{)dst  
    hy | O57N'/  
    ;CA ?eI  
    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 Mm "Wk  
      step = 20,             B*y;>q "{U  
      color = blue, IhUW=1& J  
      width = 3, <nj IXa{  
      "signal output" Cca6L9%  
    K2*1T+?X  
    ;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 Y 5Qb4Sa  
       step = 20, color = red, width = 3,"residual pump" a#^_"GX  
    :G^"e  
    ! set_L(L_f) {restore the original fiber length } o>0O@NE  
    {5U1`>  
    4pLQ"&>}80  
    ; ------------- u/_Gq[Q,u  
    diagram 4:                                  !输出图表4 zwMQXI'k83  
    tB GkRd!  
    "TransverseProfiles" Yr5iZ~V$  
    SrdE>fNbs  
    I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) &aY/eD  
    T}V7SD.  
    x: 0, 1.4 * r_co /um D}mo\  
    "radialposition (µm)", @x RlU;v2Kch  
    y: 0, 1.2 * I_max *cm^2 ?6 8$3;  
    "intensity (W/ cm&sup2;)", @y c=jcvDQ6W  
    y2: 0, 1.3 * N_Tm tDEXm^B2Sv  
    frame L& I` #  
    hx Uy(vELB  
    hy B"7$!Co  
    / c +,  
    f: N_dop(1, x * um,0),      !掺杂浓度的径向分布 A,3@j@bdy  
      yscale = 2, ^?E^']H)5u  
      color = gray, -zPm{a  
      width = 3, BXT 80a\  
      maxconnect = 1, RcY6V_Qx  
      "N_dop (right scale)" #x, ]D  
    5OPS&:  
    f: I(pump, -1, x *um, 0) * cm^2,    !泵浦光沿光纤径向的强度分布 PZKbnu  
      color = red, <dq,y>  
      maxconnect = 1,           !限制图形区域高度,修正为100%的高度 WA<H  
      width = 3, +F1]M2p]  
      "pump" 0\V\qAk  
    eA~J4k_  
    f: I(signal_fw, -1,x * um, 0) * cm^2,  !信号光沿光纤径向的强度分布 }UyzM y,  
      color = blue, p#ZMABlE,P  
      maxconnect = 1, TvQWdX=  
      width = 3, bk/.<Rt  
      "signal" [P.@1mV  
    C*"Rd   
    vs5 D:cZ}  
    ; ------------- `Mo~EHso.  
    diagram 5:                                  !输出图表5 EZ:I$X  
    *raIV]W3  
    "TransitionCross-sections" zi?qK?m  
    WpZy](,  
    I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) Q'FX:[@x-S  
    M \ :"~XW  
    x: 1450, 2050 sL!;hKK  
    "wavelength(nm)", @x &@mvw=d  
    y: 0, 0.6 ^JYF1   
    "cross-sections(1e-24 m&sup2;)", @y ,$hQ(yF  
    frame K?z*3^^X;  
    hx j zxf"X-  
    hy 2&^,IIp  
    (Q}PeKM?jq  
    f: s12_Tm(x * nm) /1e-24,      !Tm3+吸收截面与波长的关系 *D,v>(  
      color = red, nG&w0de<>  
      width = 3, FiV^n6-F`  
      "absorption" qg_>`Bv"a  
    f: s21_Tm(x * nm) /1e-24,  !Tm3+发射截面与波长的关系 N&R '$w  
      color = blue, 5O;/ lX!u  
      width = 3, rC=p;BC@dD  
      "emission" U p]VU9z  
    oN1!>S9m  
     
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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