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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
    (* L]zNf71RD  
    Demo for program"RP Fiber Power": thulium-doped fiber laser, z<a2cQ?XQ  
    pumped at 790 nm. Across-relaxation process allows for efficient .1ddv4Hk  
    population of theupper laser level. s'2Rs^,hN  
    *)            !(*  *)注释语句 \K`jCsT  
    l`rC0kJ]  
    diagram shown: 1,2,3,4,5  !指定输出图表 8&a_A:h  
    ; 1: "Powersvs. Position"     !分号是注释;光纤长度对功率的影响 kr_oUXiX  
    ; 2:"Variation of the Pump Power"  !泵浦光功率变化对信号输出功率的影响 *)PG-$6X&  
    ; 3:"Variation of the Fiber Length"!信号输出功率vs 光纤长度的变化,仿真最佳光纤长度 y1(P<7:t?  
    ; 4:"Transverse Profiles"             !横向分布,横坐标为半径位置   8Uj:  
    ; 5:"Transition Cross-sections"    !不同波长的跃迁横截面,横坐标波长,纵坐标为横截面 Ku%6$C!,  
    3YTIH2z 5  
    include"Units.inc"         !读取“Units.inc”文件中内容 $Qq_qTJu?G  
    >rRf9wO1l  
    include"Tm-silicate.inc"    !读取光谱数据 r>3^kL5UI  
    F_PTMl=Q|J  
    ; Basic fiberparameters:    !定义基本光纤参数 q,,j',8kq/  
    L_f := 4 { fiberlength }      !光纤长度 T]2U fi.  
    No_z_steps := 50 {no steps along the fiber } !光纤步长,大括号{ }是注释,相当于备注 me'(lQ6^  
    r_co := 6 um { coreradius }                !纤芯半径 <3#<I)#  
    N_Tm := 100e24 { Tmdoping concentration }  !纤芯Tm离子掺杂浓度 tBl#o ^  
    Z ps&[;R$-  
    ; Parameters of thechannels:                !定义光信道 rdI]\UH  
    l_p := 790 nm {pump wavelength }                !泵浦光波长790nm 2NR7V*A  
    dir_p := forward {pump direction (forward or backward) }   !前向泵浦 ta! V=U  
    P_pump_in := 5 {input pump power }                    !输入泵浦功率5W |e"/Mf[  
    w_p := 50 um {radius of pump cladding }               !包层泵浦相应的半径 50um 1jOKcm'#  
    I_p(r) := (r <=w_p) { pump intensity profile }          !泵浦光强度分布 DNho%Xk  
    loss_p := 0 {parasitic losses of pump wave }           !泵浦光寄生损耗为0 F^sw0 .b  
    J8h7e}n?  
    l_s := 1940 nm {signal wavelength }                   !信号光波长1940nm $n*%v85  
    w_s := 7 um                          !信号光的半径 RO(iHR3cA  
    I_s(r) := exp(-2 *(r / w_s)^2)            !信号光的高斯强度分布 l4 `^!  
    loss_s := 0                            !信号光寄生损耗为0 =5_y<0`4  
    ,Qo}J@e(  
    R_oc := 0.70 {output coupler reflectivity (right side) }      !输出耦合反射率 C "9"{  
    UG=I~{L  
    ; Function for defining themodel:   !定义模型函数,一定要有calc命令,否则函数只会被定义,但不会被执行 As}eUm)B5c  
    calc ZV#$Z  
      begin .P%ym~S  
        global allow all;                   !声明全局变量 f#mx:Q.7I  
        set_fiber(L_f, No_z_steps, '');        !光纤参数 V(I7*_ZFl  
        add_ring(r_co, N_Tm); @{bb'q['@  
        def_ionsystem();              !光谱数据函数 9i[4"&K  
        pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  !泵浦光信道 d"!yD/RD  
        signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      !前向信号光信道 \CtQ*[FmN  
        signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    !后向信号光信道 $/.<z(F  
        set_R(signal_fw, 1, R_oc);                                 !设置反射率函数 7%tR&F -u  
        finish_fiber();                                   0&B:\  
      end; {0fz9"|U  
    #ZF>WoC@e?  
    ; Display someoutputs in the Output window (on the right side): !在Output aera区域显示输出 8qmknJC  
    show "Outputpowers:"                                   !输出字符串Output powers: Lv3XYZgW~  
    show"pump:     ", P_out(pump):d3:"W"  !输出字符串pump:和计算值(格式为3个有效数字,单位W) w #<^RKk  
    show"signal:   ",P_out(signal_fw):d3:"W" !输出字符串signal:和计算值(格式为3个有效数字,单位W) kyK'  
    OT%V{hD  
    ,$PFI(Whk  
    ; ------------- 'oCm.~;_  
    diagram 1:                   !输出图表1 @jKDj]\  
    9 c6'  
    "Powers vs.Position"          !图表名称 86#-q7aX  
    }"0{zrz  
    x: 0, L_f                      !命令x: 定义x坐标范围 BP:(IP!&  
    "position infiber (m)", @x      !x轴标签;@x 指示这些字符串沿坐标轴放置 w=5   
    y: 0, 15                      !命令y: 定义y坐标范围 ,y%ziay  
    y2: 0, 100                    !命令y2: 定义第二个y坐标范围 hLSTSD}  
    frame          !frame改变坐标系的设置 "]w!`^'_  
    legpos 600, 500  !图行在图表窗口中的位置(相对于左上角而言) $59nu7yr  
    hx             !平行于x方向网格 |a>}9:g,=*  
    hy              !平行于y方向网格 8T<@ @6`T  
    d<_NB]V&F  
    f: P(pump, x),    !命令f: 定义函数图;P(pump, x)函数是计算x位置处的泵浦光功率 yqYhe-"  
      color = red,  !图形颜色 n{L:MT9TD  
      width = 3,   !width线条宽度 `i9N )3 X  
      "pump"       !相应的文本字符串标签 FQ0KU b}0  
    f: P(signal_fw, x),  !P(signal_fw ,x) 函数是计算x位置处的前向信号光功率 PaxK^*  
      color = blue,     0K/G&c?;=  
      width = 3, b h*^{  
      "fw signal" @~s~/[  
    f: P(signal_bw, x),   !P(signal_bw ,x) 函数是计算x位置处的后向信号光功率 z'T=]- D  
      color = blue, (Hl8U  
      style = fdashed, }$<^wt  
      width = 3, .hc|t-7f  
      "bw signal" 487YaioB$  
    [f=.!\0\  
    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 \WiqN*ZF  
      yscale = 2,            !第二个y轴的缩放比例 z'_&|-m  
      color = magenta, di--:h/  
      width = 3, ka!Bmv)  
      style = fdashed, 0hFH^2%UY  
      "n2 (%, right scale)" B~WK)UR  
     WN$R[N  
    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 6zv;lx0<D&  
      yscale = 2, 3IGCl w(  
      color = red, (=`Z0)=  
      width = 3, Z(KmS (  
      style = fdashed, c%ZeX%p  
      "n3 (%, right scale)" xC[~Fyhp  
    m"<4\;GK  
    ;i.I&*t  
    ; ------------- xrfPZBLy  
    diagram 2:                    !输出图表2 sZ]'DH&_(  
    ^p$1D  
    "Variation ofthe Pump Power" U@#?T  
    xLe =d|6  
    x: 0, 10 |3S'8Oe CI  
    "pump inputpower (W)", @x \{[D|_   
    y: 0, 10 "\4]X"3<+  
    y2: 0, 100 ~B<97x(X  
    frame y!SF/i?Py  
    hx kxygf9I!;  
    hy LE8K)i  
    legpos 150, 150 GhtbQM1[H  
    I<c@uXXV;!  
    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 /X@7ju;   
      step = 5, ('T4Db  
      color = blue, l8er$8S}  
      width = 3, (L`l+t1  
      "signal output power (W, leftscale)",     !相应的文本字符串标签 MJ1W*'9</W  
      finish set_P_in(pump, P_pump_in) 5LO4P>fq  
    ^CfM|L8>  
    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 mr@_ %U  
      yscale = 2, sk~za  
      step = 5, U&,r4>V@h>  
      color = magenta, ^uC"dfH  
      width = 3, `@4 2jG}*  
      "population of level 2 (%, rightscale)", Sc%aJ1  
      finish set_P_in(pump, P_pump_in) Uc\|X;nkRk  
    ooomi"u  
    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 b;Hm\aK  
      yscale = 2, 6lN?)<uQ  
      step = 5, ^Vl^,@  
      color = red, N{ : [/  
      width = 3, 9@( O\xr  
      "population of level 3 (%, rightscale)", 's=Q.s  
      finish set_P_in(pump, P_pump_in) Z"l`e0 {  
    Z~duJsH  
    $|>6z_3%  
    ; ------------- UVc>i9,0  
    diagram 3:                         !输出图表3 Qe7" Z  
    *d^9,GGn-  
    "Variation ofthe Fiber Length" !8wZw68"  
    imo'(j7  
    x: 0.1, 5 3js)niT9u  
    "fiber length(m)", @x OI'uH$y  
    y: 0, 10 bq c;.4$  
    "opticalpowers (W)", @y Bx\#`Y  
    frame :X3rd|;kc  
    hx 4aj[5fhb-  
    hy [P.@1mV  
    C*"Rd   
    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 O4lxeiRgC  
      step = 20,             F6RyOUma  
      color = blue,  <'g0il  
      width = 3, *raIV]W3  
      "signal output" zi?qK?m  
    WpZy](,  
    ;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 Q'FX:[@x-S  
       step = 20, color = red, width = 3,"residual pump" M \ :"~XW  
    VFe-#"0ZO  
    ! set_L(L_f) {restore the original fiber length } ODM>Z8@W/  
    )v*v  
    gg lNpzj  
    ; ------------- P Xyyyir{  
    diagram 4:                                  !输出图表4 `l HKQwu  
    OU0xZ=G  
    "TransverseProfiles" *D,v>(  
    d_4n0Kh0  
    I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) t:?<0yfp&  
    9`LU=Xv/  
    x: 0, 1.4 * r_co /um 8r7/IGFg  
    "radialposition (µm)", @x f9h:"Dnzin  
    y: 0, 1.2 * I_max *cm^2 )a4E&D  
    "intensity (W/ cm&sup2;)", @y G:E+s(x  
    y2: 0, 1.3 * N_Tm ]=$-B  
    frame 9b{g+lMZo  
    hx -L^0-g  
    hy w\0Oz?N  
    [15hci+-  
    f: N_dop(1, x * um,0),      !掺杂浓度的径向分布 TzD:bKE&  
      yscale = 2, ,Ut!u)  
      color = gray, b?+ Yo>yF8  
      width = 3, R7\{w(`K  
      maxconnect = 1, zJB+C=]D7H  
      "N_dop (right scale)" Li?{e+g  
    S>/I?(J  
    f: I(pump, -1, x *um, 0) * cm^2,    !泵浦光沿光纤径向的强度分布 (P]^8qc  
      color = red, Og&0Z)%  
      maxconnect = 1,           !限制图形区域高度,修正为100%的高度 n:}MULy;  
      width = 3, @&am!+z  
      "pump" 1s^$oi}  
    ^)eessZ  
    f: I(signal_fw, -1,x * um, 0) * cm^2,  !信号光沿光纤径向的强度分布 Gaw,1Ow!`2  
      color = blue, -r6(=A  
      maxconnect = 1, a9mr-`<  
      width = 3, MJ*oeI!.=  
      "signal" |-cALQ  
    Ggxrj'r  
    S7\|/h:4  
    ; ------------- f:)K  
    diagram 5:                                  !输出图表5 LyCV_6;D  
    @; j0c_^"!  
    "TransitionCross-sections" H|(*$!~e  
    d~Z:$&r  
    I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) hj#+8=  
    q)zu}m  
    x: 1450, 2050 4`^TC[  
    "wavelength(nm)", @x \fQgiX  
    y: 0, 0.6 w oY)G7%  
    "cross-sections(1e-24 m&sup2;)", @y a*$1la'Uf  
    frame %_i0go,^  
    hx |)>GeE  
    hy R&-W_v+  
    ;M(ehX  
    f: s12_Tm(x * nm) /1e-24,      !Tm3+吸收截面与波长的关系 K{[Fa,]'  
      color = red, 0ghwFo  
      width = 3, ^*owD;]4_  
      "absorption" XQ|j5]  
    f: s21_Tm(x * nm) /1e-24,  !Tm3+发射截面与波长的关系 JOE{&^j  
      color = blue, 9g^./k\8%  
      width = 3, ={&TeMMA  
      "emission" hc4`'r;  
    '!|E+P-  
     
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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