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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
    (* W<OO:B.ty  
    Demo for program"RP Fiber Power": thulium-doped fiber laser, 0qk.NPMB0  
    pumped at 790 nm. Across-relaxation process allows for efficient #M=d)}[  
    population of theupper laser level. !k0t (.  
    *)            !(*  *)注释语句 zE_t(B(Q  
    Xb5 $ijH  
    diagram shown: 1,2,3,4,5  !指定输出图表 I.L8A|nZ  
    ; 1: "Powersvs. Position"     !分号是注释;光纤长度对功率的影响 m9li%p  
    ; 2:"Variation of the Pump Power"  !泵浦光功率变化对信号输出功率的影响 1`@rAA>h'  
    ; 3:"Variation of the Fiber Length"!信号输出功率vs 光纤长度的变化,仿真最佳光纤长度 8+U':xR  
    ; 4:"Transverse Profiles"             !横向分布,横坐标为半径位置 /u N3"m5i  
    ; 5:"Transition Cross-sections"    !不同波长的跃迁横截面,横坐标波长,纵坐标为横截面 tX.{+yyU  
    Jm {~H%  
    include"Units.inc"         !读取“Units.inc”文件中内容 pTzfc`~xv  
    -nKBSls  
    include"Tm-silicate.inc"    !读取光谱数据 x|IG'R1:Y  
    CJ 9tO#R  
    ; Basic fiberparameters:    !定义基本光纤参数 ey3;rY1  
    L_f := 4 { fiberlength }      !光纤长度 _<P~'IN+n  
    No_z_steps := 50 {no steps along the fiber } !光纤步长,大括号{ }是注释,相当于备注 G)wIxm$?0  
    r_co := 6 um { coreradius }                !纤芯半径 i4*!t.eI  
    N_Tm := 100e24 { Tmdoping concentration }  !纤芯Tm离子掺杂浓度 >6cENe_@t  
    y1zep\-D  
    ; Parameters of thechannels:                !定义光信道 ]Zz<9zix  
    l_p := 790 nm {pump wavelength }                !泵浦光波长790nm  {r?qI  
    dir_p := forward {pump direction (forward or backward) }   !前向泵浦 k.CHMl]  
    P_pump_in := 5 {input pump power }                    !输入泵浦功率5W ne\N1`AU  
    w_p := 50 um {radius of pump cladding }               !包层泵浦相应的半径 50um ?FRQ!R  
    I_p(r) := (r <=w_p) { pump intensity profile }          !泵浦光强度分布 kzcD}?mSS  
    loss_p := 0 {parasitic losses of pump wave }           !泵浦光寄生损耗为0 L~~Dj:%uq  
    !WReThq  
    l_s := 1940 nm {signal wavelength }                   !信号光波长1940nm Ch9A6?=Hj8  
    w_s := 7 um                          !信号光的半径 qnZ`]?  
    I_s(r) := exp(-2 *(r / w_s)^2)            !信号光的高斯强度分布 @5-+>\Hd^t  
    loss_s := 0                            !信号光寄生损耗为0 r]vD]  
    G$HLta  
    R_oc := 0.70 {output coupler reflectivity (right side) }      !输出耦合反射率 JI}p{ yI  
    C'$}!p70  
    ; 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 y:zo/#34  
    calc |uE _aFQs  
      begin f{[,!VG  
        global allow all;                   !声明全局变量 %C8fv|@:f  
        set_fiber(L_f, No_z_steps, '');        !光纤参数 D3emO'`gQ  
        add_ring(r_co, N_Tm); XT5Vo  
        def_ionsystem();              !光谱数据函数 5bzYTK&-  
        pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  !泵浦光信道 _\Cd.  
        signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      !前向信号光信道 iAlFgOk'  
        signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    !后向信号光信道 AH(O"v`  
        set_R(signal_fw, 1, R_oc);                                 !设置反射率函数 .W+ F<]r  
        finish_fiber();                                   6c>tA2G|8  
      end; /@bLc1"  
    OWK)4[HY(  
    ; Display someoutputs in the Output window (on the right side): !在Output aera区域显示输出 7TQh'j   
    show "Outputpowers:"                                   !输出字符串Output powers: cMEM}Qh T  
    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) It\o b7n  
    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) |KFWW  
    )>LC*_v  
    `|^<y.-6  
    ; ------------- =`X ;fz  
    diagram 1:                   !输出图表1 "Rp]2'?  
    ka&-tGg  
    "Powers vs.Position"          !图表名称 \g}FoN&  
    Hvq< _&2  
    x: 0, L_f                      !命令x: 定义x坐标范围 NB&u^8b  
    "position infiber (m)", @x      !x轴标签;@x 指示这些字符串沿坐标轴放置 8&=+Mw  
    y: 0, 15                      !命令y: 定义y坐标范围 u[jdYWQa  
    y2: 0, 100                    !命令y2: 定义第二个y坐标范围 XfxNyZsy&>  
    frame          !frame改变坐标系的设置 ::vw 1Es  
    legpos 600, 500  !图行在图表窗口中的位置(相对于左上角而言) GfQP@R"  
    hx             !平行于x方向网格 'ej{B0rE  
    hy              !平行于y方向网格 2/B Flb  
    ZX.VzZS  
    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 G<-)Kx  
      color = red,  !图形颜色 J 6S  
      width = 3,   !width线条宽度 ]~(Ipz2NP  
      "pump"       !相应的文本字符串标签 {Pg7IYjH  
    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 fXw%2wg  
      color = blue,     &T}v1c7)  
      width = 3, "7 )F";_(^  
      "fw signal" C_#0Y_O  
    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 kkrQ;i)Z  
      color = blue, =dX*:An  
      style = fdashed, ZF;S}1  
      width = 3, JPUDnPr  
      "bw signal" ;:9 x.IkxC  
    5Kv=;o=U  
    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 US7hKNm.  
      yscale = 2,            !第二个y轴的缩放比例 (U`7[F  
      color = magenta, V_}`2.Pg  
      width = 3, KX<RD|=  
      style = fdashed, %4L|#^7:  
      "n2 (%, right scale)" Sjr(e}*  
    LTtfOcrt  
    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 oT|E\wj  
      yscale = 2, VUF7-C*  
      color = red, -"a+<(Y  
      width = 3, 3 XfXMVm  
      style = fdashed, z4-AOTo2y  
      "n3 (%, right scale)" H[,.nH_>+  
    4kg9R^0  
    .<42-IEc  
    ; ------------- fJE ki>1  
    diagram 2:                    !输出图表2 VY _(0  
    T"d]QYJS  
    "Variation ofthe Pump Power" FcW ?([l  
    )X^nzhZ2O"  
    x: 0, 10 Gs?W7}<$  
    "pump inputpower (W)", @x q]Qgg  
    y: 0, 10 !Q7   
    y2: 0, 100 :{66WSa@Dd  
    frame j9u-C/Q\r  
    hx (tq)64XVz  
    hy =_yOX=g|  
    legpos 150, 150 \R-u+ci$ZY  
    7OWiG,  
    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 ,XA;S5FE  
      step = 5, e#'`I^8l  
      color = blue, cE*|8'rSf  
      width = 3, |nt J+  
      "signal output power (W, leftscale)",     !相应的文本字符串标签 @6D<D6`  
      finish set_P_in(pump, P_pump_in) N{ 9<Tf*  
    OC>" +  
    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 VS).!;>z  
      yscale = 2, K5.C*|w  
      step = 5, huTJ a2  
      color = magenta, X2e|[MWkp  
      width = 3, ;c>Yr ?^  
      "population of level 2 (%, rightscale)", @W @L%<  
      finish set_P_in(pump, P_pump_in) +bO{U C[  
    MW$9,[  
    f: (set_P_in(pump,x); 100 * n_av(3)),   !改变泵浦信号功率对能级3上激活粒子占比的影响 d;;=s=j  
      yscale = 2, k Dv)g  
      step = 5, J5o"JRJ"  
      color = red, 2hp x%H  
      width = 3, ^2??]R&Q  
      "population of level 3 (%, rightscale)", z H \*v'  
      finish set_P_in(pump, P_pump_in) 8D n]`}ok  
    8@qahEgQ  
    1_p'0lFe  
    ; ------------- +.R-a+y3  
    diagram 3:                         !输出图表3 A!f0AEA,  
    Rxli;blzi  
    "Variation ofthe Fiber Length" X! ]~]%K$y  
    OKU P  
    x: 0.1, 5 w}1)am &pD  
    "fiber length(m)", @x 'RA[_Z  
    y: 0, 10 ^4fkZh  
    "opticalpowers (W)", @y 2~@=ua[|=5  
    frame [)Ge^yI7  
    hx vn_avYwiy  
    hy an7N<-?  
    5Ci}w|c/>  
    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 wd]Yjr#%Ii  
      step = 20,             evs2dz<eA  
      color = blue, 7RLh#D|  
      width = 3, cnc$^[c  
      "signal output" B 3h<K}  
    dg!sRm1iZ:  
    ;f: (set_L(x);P_out(pump)),                     !改变光纤长度对泵浦信号输出功率的影响 _YJwF1e+M  
       step = 20, color = red, width = 3,"residual pump" -?(RoWv@X&  
    f6"j-IW[z  
    ! set_L(L_f) {restore the original fiber length } #X8[g_d/  
    4J_%quxO  
    bk?\=4B:E  
    ; ------------- ]@P*&FRcZ  
    diagram 4:                                  !输出图表4 s_[?(Ip{  
    QCo^#-   
    "TransverseProfiles" @$*c0 . |z  
    4(&'V+o  
    I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) M,@SUu v"  
    /7#&qx8  
    x: 0, 1.4 * r_co /um JU@$(  
    "radialposition (µm)", @x  ;E&XFTdO  
    y: 0, 1.2 * I_max *cm^2 4 5lg&oO  
    "intensity (W/ cm&sup2;)", @y %;5hHRA  
    y2: 0, 1.3 * N_Tm [Ok8l='  
    frame $>UzXhf}\  
    hx (wfg84  
    hy [GuDMl3hC  
    ?MYD}`Cv  
    f: N_dop(1, x * um,0),      !掺杂浓度的径向分布 >guQY I@4,  
      yscale = 2, qWFg~s#+  
      color = gray, M($},xAvDU  
      width = 3, @}gdOaw  
      maxconnect = 1, GCKl [<9*  
      "N_dop (right scale)" A-io-P7qyj  
    39j d}]e  
    f: I(pump, -1, x *um, 0) * cm^2,    !泵浦光沿光纤径向的强度分布 =gIYa  
      color = red, 7q2YsI  
      maxconnect = 1,           !限制图形区域高度,修正为100%的高度 hLvv:C@  
      width = 3, hvyN8We  
      "pump" JdHc'WtS!|  
    6!nb)auVi  
    f: I(signal_fw, -1,x * um, 0) * cm^2,  !信号光沿光纤径向的强度分布 r2th6hl~  
      color = blue, }D^Gt)   
      maxconnect = 1, ="DgrH  
      width = 3, L@Z &v'A  
      "signal" 7|-xM>L$A  
    ["}A#cO652  
    oc(bcU  
    ; ------------- _&/Zab5  
    diagram 5:                                  !输出图表5  ~^S-  
    N::;J  
    "TransitionCross-sections" 1aE/_  
    d eoM~r9s  
    I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) 1Q5<6*QL"  
    LXLDu2/@  
    x: 1450, 2050 l8-jFeeMd  
    "wavelength(nm)", @x cPcV[6)5K9  
    y: 0, 0.6 -G;1U  
    "cross-sections(1e-24 m&sup2;)", @y {nefS\#{  
    frame ".%LBs~$  
    hx )^N8L<   
    hy |S{P`)z%f  
    <k](s  
    f: s12_Tm(x * nm) /1e-24,      !Tm3+吸收截面与波长的关系 3 ms/v:\  
      color = red, LrMFzd}_O  
      width = 3, $:[BB ,$  
      "absorption" R3n&o%$*  
    f: s21_Tm(x * nm) /1e-24,  !Tm3+发射截面与波长的关系 >U<nEnB$?  
      color = blue, 4C%>/*%8>  
      width = 3, a*j <TR  
      "emission" #sU~fq  
    h50StZ8Yr  
     
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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