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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
    (* yN6>VD{F  
    Demo for program"RP Fiber Power": thulium-doped fiber laser, u0Nm.--;_3  
    pumped at 790 nm. Across-relaxation process allows for efficient t0)<$At6J  
    population of theupper laser level. IzLQhDJ1  
    *)            !(*  *)注释语句 U;q];e:,=}  
    B9,^mE#  
    diagram shown: 1,2,3,4,5  !指定输出图表 T'H::^9:E  
    ; 1: "Powersvs. Position"     !分号是注释;光纤长度对功率的影响 SUM4Di7  
    ; 2:"Variation of the Pump Power"  !泵浦光功率变化对信号输出功率的影响 )"+2Z^1-  
    ; 3:"Variation of the Fiber Length"!信号输出功率vs 光纤长度的变化,仿真最佳光纤长度 nNt1C  
    ; 4:"Transverse Profiles"             !横向分布,横坐标为半径位置 4\M.6])_   
    ; 5:"Transition Cross-sections"    !不同波长的跃迁横截面,横坐标波长,纵坐标为横截面 7U|mu~$.!  
    ZJ*g)) k7  
    include"Units.inc"         !读取“Units.inc”文件中内容 ]#2Y e7+  
    qIMA6u/  
    include"Tm-silicate.inc"    !读取光谱数据 m3<+yz$!r  
    BV#78,8(  
    ; Basic fiberparameters:    !定义基本光纤参数 NnT g3:.  
    L_f := 4 { fiberlength }      !光纤长度 T~_/Vi  
    No_z_steps := 50 {no steps along the fiber } !光纤步长,大括号{ }是注释,相当于备注 =#gEB#$x:  
    r_co := 6 um { coreradius }                !纤芯半径 umi5Wb<  
    N_Tm := 100e24 { Tmdoping concentration }  !纤芯Tm离子掺杂浓度 y|wlq3o  
    ]X Z-o>+ ,  
    ; Parameters of thechannels:                !定义光信道 Z|" p*5O,  
    l_p := 790 nm {pump wavelength }                !泵浦光波长790nm ~@.%m"<.  
    dir_p := forward {pump direction (forward or backward) }   !前向泵浦 UMl#D >:C<  
    P_pump_in := 5 {input pump power }                    !输入泵浦功率5W $(e#aHB  
    w_p := 50 um {radius of pump cladding }               !包层泵浦相应的半径 50um 0 &_UH}10  
    I_p(r) := (r <=w_p) { pump intensity profile }          !泵浦光强度分布 ,\2:/>2  
    loss_p := 0 {parasitic losses of pump wave }           !泵浦光寄生损耗为0 G  uQ=gN  
    z7GTaX$d  
    l_s := 1940 nm {signal wavelength }                   !信号光波长1940nm 3jB$2:#  
    w_s := 7 um                          !信号光的半径 mE%$HZ}  
    I_s(r) := exp(-2 *(r / w_s)^2)            !信号光的高斯强度分布 )B,|@ynu  
    loss_s := 0                            !信号光寄生损耗为0 @f]{>OS  
    jO*l3:!~\  
    R_oc := 0.70 {output coupler reflectivity (right side) }      !输出耦合反射率 K"j_>63)  
    10!wqyj&  
    ; 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 `K~AhlJUQ  
    calc Suk  
      begin yeDsJ/L  
        global allow all;                   !声明全局变量 ,to+oSZE  
        set_fiber(L_f, No_z_steps, '');        !光纤参数 D(-yjY8aG  
        add_ring(r_co, N_Tm); ]0hrRA`  
        def_ionsystem();              !光谱数据函数 |sRipWh  
        pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  !泵浦光信道 $un?0S  
        signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      !前向信号光信道 )XcOl7XLN  
        signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    !后向信号光信道 NT@;N/I  
        set_R(signal_fw, 1, R_oc);                                 !设置反射率函数 _4^R9Bt  
        finish_fiber();                                   EF3Cdu{]P  
      end; ;4N;D  
    ;qHOOT  
    ; Display someoutputs in the Output window (on the right side): !在Output aera区域显示输出 dT,o=8fg  
    show "Outputpowers:"                                   !输出字符串Output powers: )jrV#/m9  
    show"pump:     ", P_out(pump):d3:"W"  !输出字符串pump:和计算值(格式为3个有效数字,单位W) V,rq0xW  
    show"signal:   ",P_out(signal_fw):d3:"W" !输出字符串signal:和计算值(格式为3个有效数字,单位W) .`>y@p!  
    jReXyRmo({  
    <! )**  
    ; ------------- A\8}|r(>9E  
    diagram 1:                   !输出图表1 2^i(gaXUQ  
    aaD;jxT&M|  
    "Powers vs.Position"          !图表名称 3U_2!zF3_  
    qOIW(D  
    x: 0, L_f                      !命令x: 定义x坐标范围 e[hcJz!D  
    "position infiber (m)", @x      !x轴标签;@x 指示这些字符串沿坐标轴放置 [1.+H yJ}  
    y: 0, 15                      !命令y: 定义y坐标范围 5^^XQ?"  
    y2: 0, 100                    !命令y2: 定义第二个y坐标范围 )iFJz/n>  
    frame          !frame改变坐标系的设置 B&D}F=U  
    legpos 600, 500  !图行在图表窗口中的位置(相对于左上角而言) u\eEh*<7q  
    hx             !平行于x方向网格 HRB<Y mP@  
    hy              !平行于y方向网格 L:@7tc.  
    pAT7)Ch  
    f: P(pump, x),    !命令f: 定义函数图;P(pump, x)函数是计算x位置处的泵浦光功率 \7CGUB>L  
      color = red,  !图形颜色 KtNY_&xd  
      width = 3,   !width线条宽度 9k{PBAP  
      "pump"       !相应的文本字符串标签 w*R$o  
    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 _a1x\,R|DB  
      color = blue,     rtc9wu  
      width = 3, _%QhOY5tv"  
      "fw signal" +SwR+H)?  
    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 "I(xgx*  
      color = blue, BCA&mi3q  
      style = fdashed, &RfC"lc  
      width = 3, P#AW\d^"B  
      "bw signal" kh`"WN Nt  
    D*lKn62  
    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 K.0:C`C  
      yscale = 2,            !第二个y轴的缩放比例 c"[cNZo  
      color = magenta, 1')%`~  
      width = 3, &Y }N|q-  
      style = fdashed, <_7*67{  
      "n2 (%, right scale)" BqT y~{)+  
    lv04g} W  
    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 |j7,Mu+  
      yscale = 2, 13>0OKg`#  
      color = red, 5k.oW=  
      width = 3, jbAx;Xt'=M  
      style = fdashed, .X;3,D[w  
      "n3 (%, right scale)" 4T ~}  
    4M2j!Sw  
    -PfX0y9n  
    ; -------------  a24"yT  
    diagram 2:                    !输出图表2 .4E&/w+  
    t;}:waZD  
    "Variation ofthe Pump Power" }|pwz   
    cH&J{WeZa  
    x: 0, 10 U[ 0=L`0e  
    "pump inputpower (W)", @x z*!%g[3I  
    y: 0, 10 r8xv#r1  
    y2: 0, 100 *+#8mA(  
    frame Ck) * &  
    hx ye,>A.  
    hy N'GeHByIT  
    legpos 150, 150 }n>p4W"OM  
    32`{7a3!=  
    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 ]jo1{IcI  
      step = 5, IhVO@KJI  
      color = blue, N u<_}  
      width = 3, I+tb[*X+  
      "signal output power (W, leftscale)",     !相应的文本字符串标签 )% ~OH  
      finish set_P_in(pump, P_pump_in) : qd`zG3  
    xwq+j "  
    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 oY933i@l)P  
      yscale = 2, f}9zgWU  
      step = 5, ?j"KV_  
      color = magenta,  PoxK{Y  
      width = 3, e?8HgiP-  
      "population of level 2 (%, rightscale)", ~Vr.J}]J  
      finish set_P_in(pump, P_pump_in) sTn<#l6  
    ~T1 XLu  
    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 n $$SNWgM  
      yscale = 2, o!kbK#k  
      step = 5, m}7iTDJR9  
      color = red, *%%g{ 3$  
      width = 3, ^\4h<M  
      "population of level 3 (%, rightscale)", Z{]0jhUyNh  
      finish set_P_in(pump, P_pump_in) 3h$6t7=C  
    .y!<t}  
    1;Ou7T9w  
    ; ------------- E2R&[Q"%  
    diagram 3:                         !输出图表3 _({hc+9p  
    U:^PC x`  
    "Variation ofthe Fiber Length" PHZ0P7  
    '"SEw w  
    x: 0.1, 5 21K>`d\  
    "fiber length(m)", @x wl#@lOv-P  
    y: 0, 10 \hDlTp }  
    "opticalpowers (W)", @y <G|(|E1  
    frame t*Sa@$p  
    hx S4Y&  
    hy Ya3C#=  
    :~Wrf8 UQ  
    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 K,+LG7ec  
      step = 20,             &$`P,i 1)  
      color = blue, bDL,S?@  
      width = 3, kmP]SO?tx  
      "signal output" 7z JRJ*NB  
    _>(^tCo  
    ;f: (set_L(x);P_out(pump)),                     !改变光纤长度对泵浦信号输出功率的影响 cW@Zd5&0S  
       step = 20, color = red, width = 3,"residual pump" 6dabU*  
    (^T F%(H  
    ! set_L(L_f) {restore the original fiber length } 9K{%vK  
    hI]Hp3S  
    }wr{W:j  
    ; ------------- k/#&qC>]  
    diagram 4:                                  !输出图表4 _(%d(E2?  
    hYPl&^  
    "TransverseProfiles" ObVGV  
    KL1/^1  
    I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) 8xMEe:}V  
    n}F&1Z  
    x: 0, 1.4 * r_co /um U>=Z- T  
    "radialposition (µm)", @x *W,]>v0%T  
    y: 0, 1.2 * I_max *cm^2 %b&". mN  
    "intensity (W/ cm&sup2;)", @y LlX{#R  
    y2: 0, 1.3 * N_Tm ! h"Kq>9 T  
    frame Rdvk ml@@  
    hx q rJ`1  
    hy G&D7a/G\  
    ;RDh ~EV  
    f: N_dop(1, x * um,0),      !掺杂浓度的径向分布 #lmB AL~3  
      yscale = 2, *scVJ  
      color = gray, q)X$^oE!6  
      width = 3, IUE~_7  
      maxconnect = 1, "c3Grfoz  
      "N_dop (right scale)" S%bCyK%p  
    K2M~-S3  
    f: I(pump, -1, x *um, 0) * cm^2,    !泵浦光沿光纤径向的强度分布 D!{Y$;  
      color = red, 1C}NQ!.  
      maxconnect = 1,           !限制图形区域高度,修正为100%的高度 sqEI4~514  
      width = 3, R;s?$;I  
      "pump" +giyX7BPJ  
    q)LMm7  
    f: I(signal_fw, -1,x * um, 0) * cm^2,  !信号光沿光纤径向的强度分布 %HGD;_bhI  
      color = blue, UK595n;P  
      maxconnect = 1, 6t>.[Y"v  
      width = 3, ii[F]sR\  
      "signal" d"}k! 0m  
    xSktg]u Se  
    qaiNz S@q  
    ; ------------- Isvx7$Vu+  
    diagram 5:                                  !输出图表5 $7O}S.x  
    /Y9>8XSc  
    "TransitionCross-sections" !}YAdZJ  
    KK&rb~  
    I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) aZ2!i  
    %eX{WgH  
    x: 1450, 2050 h].<t&  
    "wavelength(nm)", @x |jI#"LbF  
    y: 0, 0.6 '8Q]C*Z  
    "cross-sections(1e-24 m&sup2;)", @y pWy=W&0~qf  
    frame a|%J=k>>  
    hx ykl .1(  
    hy "@%7-nu  
    +]*zlE\N`  
    f: s12_Tm(x * nm) /1e-24,      !Tm3+吸收截面与波长的关系 .<jr0,i  
      color = red, ?u{~>  
      width = 3, v25R_""~  
      "absorption" iP =V8g?L  
    f: s21_Tm(x * nm) /1e-24,  !Tm3+发射截面与波长的关系 ock Te5U  
      color = blue, N >FKy'.gk  
      width = 3, ]JCvyz H  
      "emission" FG6h,7+  
    DgUT5t1  
     
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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