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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
    (* _[yBwh  
    Demo for program"RP Fiber Power": thulium-doped fiber laser, X[Lwx.Ly8  
    pumped at 790 nm. Across-relaxation process allows for efficient Q(P'4XCm  
    population of theupper laser level. 24ojjxz+  
    *)            !(*  *)注释语句 $=7'Cm ?  
    `MMh"# xN  
    diagram shown: 1,2,3,4,5  !指定输出图表 )2@_V %  
    ; 1: "Powersvs. Position"     !分号是注释;光纤长度对功率的影响 -&PiD  
    ; 2:"Variation of the Pump Power"  !泵浦光功率变化对信号输出功率的影响 F9hh- "(Z  
    ; 3:"Variation of the Fiber Length"!信号输出功率vs 光纤长度的变化,仿真最佳光纤长度 y*Egt`W  
    ; 4:"Transverse Profiles"             !横向分布,横坐标为半径位置 0!WF,)/T7i  
    ; 5:"Transition Cross-sections"    !不同波长的跃迁横截面,横坐标波长,纵坐标为横截面 ?tWcx;h:>  
    K#j<G]I( @  
    include"Units.inc"         !读取“Units.inc”文件中内容 '=|2, H]  
    A!([k}@=j  
    include"Tm-silicate.inc"    !读取光谱数据 `yjHLg  
    @a AR99M  
    ; Basic fiberparameters:    !定义基本光纤参数 )!h(oR  
    L_f := 4 { fiberlength }      !光纤长度 /Iwnl   
    No_z_steps := 50 {no steps along the fiber } !光纤步长,大括号{ }是注释,相当于备注 [dm&I#m=  
    r_co := 6 um { coreradius }                !纤芯半径 K;%P_f/KJP  
    N_Tm := 100e24 { Tmdoping concentration }  !纤芯Tm离子掺杂浓度 !.\EU*)1  
    5XSr K  
    ; Parameters of thechannels:                !定义光信道 zTDB]z!A  
    l_p := 790 nm {pump wavelength }                !泵浦光波长790nm 8 |>$M  
    dir_p := forward {pump direction (forward or backward) }   !前向泵浦 m).S0  
    P_pump_in := 5 {input pump power }                    !输入泵浦功率5W Uu~7+oaQ  
    w_p := 50 um {radius of pump cladding }               !包层泵浦相应的半径 50um |}~2=r z  
    I_p(r) := (r <=w_p) { pump intensity profile }          !泵浦光强度分布 p0 @ ,-  
    loss_p := 0 {parasitic losses of pump wave }           !泵浦光寄生损耗为0 l+6y$2QR  
    4)L(41h  
    l_s := 1940 nm {signal wavelength }                   !信号光波长1940nm r(ej=aR  
    w_s := 7 um                          !信号光的半径  ~F?vf@k  
    I_s(r) := exp(-2 *(r / w_s)^2)            !信号光的高斯强度分布 /S32)=(  
    loss_s := 0                            !信号光寄生损耗为0 72hN%l   
    I{8fTod  
    R_oc := 0.70 {output coupler reflectivity (right side) }      !输出耦合反射率 \)\uAI-  
    3 ;M7^DM  
    ; 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 *R] Ob9X  
    calc  %2 A-u  
      begin 9FB[`}  
        global allow all;                   !声明全局变量 ^Eu]i  
        set_fiber(L_f, No_z_steps, '');        !光纤参数 i/ED_<_ Vg  
        add_ring(r_co, N_Tm); \;al@yC=T  
        def_ionsystem();              !光谱数据函数 (@t O1g  
        pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  !泵浦光信道 bSOxM /N  
        signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      !前向信号光信道 %4F Q~  
        signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    !后向信号光信道 ET]PF,`  
        set_R(signal_fw, 1, R_oc);                                 !设置反射率函数 grvm2`u  
        finish_fiber();                                   Y ^s_v_s  
      end; ^/nj2"  
    81m3j`b  
    ; Display someoutputs in the Output window (on the right side): !在Output aera区域显示输出 G?:{9. (  
    show "Outputpowers:"                                   !输出字符串Output powers: }6;K+INT  
    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) @J`o pR  
    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) RCXm< /  
    )e#KL$B)v  
    -6 WjYJx  
    ; ------------- Q5[x2 s_d  
    diagram 1:                   !输出图表1 &|/@;EA$8  
    Ttr)e:  
    "Powers vs.Position"          !图表名称 "4Joou"U  
    9YpgzCx Z  
    x: 0, L_f                      !命令x: 定义x坐标范围 ^$8@B]*  
    "position infiber (m)", @x      !x轴标签;@x 指示这些字符串沿坐标轴放置 vrRbUwL!  
    y: 0, 15                      !命令y: 定义y坐标范围  8*nv+  
    y2: 0, 100                    !命令y2: 定义第二个y坐标范围 U GA_^?4  
    frame          !frame改变坐标系的设置 ``;.Oy6jS  
    legpos 600, 500  !图行在图表窗口中的位置(相对于左上角而言) r[doN{%  
    hx             !平行于x方向网格 4LG[i}u.N  
    hy              !平行于y方向网格 [v@3|@  
    ]><K8N3Z  
    f: P(pump, x),    !命令f: 定义函数图;P(pump, x)函数是计算x位置处的泵浦光功率 C`G+b{o  
      color = red,  !图形颜色 N>R\,n|I  
      width = 3,   !width线条宽度 k|C~qe3E  
      "pump"       !相应的文本字符串标签 Xk9mJ]31LC  
    f: P(signal_fw, x),  !P(signal_fw ,x) 函数是计算x位置处的前向信号光功率 to2; . ~X  
      color = blue,     |PGF g0li  
      width = 3, mf~Joluc J  
      "fw signal" \a<7DTV  
    f: P(signal_bw, x),   !P(signal_bw ,x) 函数是计算x位置处的后向信号光功率 jL9g.q4^  
      color = blue, -cgLEl1J  
      style = fdashed, mLEJt,X  
      width = 3, l#%qF Db  
      "bw signal" C bWz;$r  
    cTC -cgp  
    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 ;(&$Iw9X  
      yscale = 2,            !第二个y轴的缩放比例 BiFU3FlTf  
      color = magenta, KT5amct  
      width = 3, {gL8s  
      style = fdashed, XmZs4~\K$G  
      "n2 (%, right scale)" 2 m"2>gX  
    FUt{-H!<  
    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 y?6J%~\WP  
      yscale = 2, .Us)YVbk  
      color = red, `w&A;fR! H  
      width = 3, HbOLf  
      style = fdashed, 2X X-  
      "n3 (%, right scale)" k.."_ 4  
    9"W3t]  
    )WBp.j /#  
    ; ------------- tPp9=e2[s  
    diagram 2:                    !输出图表2 Mb!b0  
    Arr(rM  
    "Variation ofthe Pump Power" CXQ+h  
    Ci-CY/]s  
    x: 0, 10 Vn=K5nm  
    "pump inputpower (W)", @x o+],L_Ab  
    y: 0, 10 jv ;8Mm  
    y2: 0, 100 {6I)6}w!k  
    frame q1a*6*YB  
    hx ?&`PN<~2z  
    hy /` ;rlH*  
    legpos 150, 150 z|M+ FHl$  
    `{oFdvL~)  
    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 _J,lF-,  
      step = 5, gzMp&J  
      color = blue, wsKOafrV  
      width = 3, +=Y[RCXT  
      "signal output power (W, leftscale)",     !相应的文本字符串标签 o?{-K-'B$  
      finish set_P_in(pump, P_pump_in) 67tB8X  
    K^5f  
    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 +s j2C  
      yscale = 2, zhC#<  
      step = 5, APJVD-  
      color = magenta, *^3&Y@  
      width = 3, 1 u~Xk?  
      "population of level 2 (%, rightscale)", ip+?k<]z  
      finish set_P_in(pump, P_pump_in) kgb:<{pJ  
    {3* Ne /  
    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 , 3&D A  
      yscale = 2, p 2>\  
      step = 5, TWeup6k  
      color = red, CJYpgSr  
      width = 3, 9 df GV!Z  
      "population of level 3 (%, rightscale)", vNDf1B5z  
      finish set_P_in(pump, P_pump_in) #rI4\K  
    oazY?E]}3  
    J1u&Ga  
    ; ------------- {9XN\v=$"*  
    diagram 3:                         !输出图表3 0woLB#v9  
    J $^"cCMr  
    "Variation ofthe Fiber Length" hnnVp_<]  
    Ln$= 8x^T  
    x: 0.1, 5 adn2&7H  
    "fiber length(m)", @x X|'[\v2ld  
    y: 0, 10 ="('  #o  
    "opticalpowers (W)", @y "oT&KW   
    frame nIqNhJ+  
    hx p f`vH`r  
    hy n`X}&(O  
    ce<88dL  
    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 l+#uQo6cqQ  
      step = 20,             bO'?7=SC  
      color = blue, "rnVPHnQR  
      width = 3, veAdk9  
      "signal output" s^"*]9B"  
    NtG^t}V  
    ;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 P r2WF~NuO  
       step = 20, color = red, width = 3,"residual pump" 1wy?<B.f  
    T(=Z0M  
    ! set_L(L_f) {restore the original fiber length } S=a>rnF  
    -`CE;  
    nC}Y+_wo0  
    ; ------------- P]0/S  
    diagram 4:                                  !输出图表4 %$&_!  
    Ys>Z=Eky  
    "TransverseProfiles" .k"unclT0  
    J(5#fo{Q.g  
    I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) Sg< B+u\\  
    f<;eNN  
    x: 0, 1.4 * r_co /um }E^k*S  
    "radialposition (µm)", @x 2-%9k)KH  
    y: 0, 1.2 * I_max *cm^2 fp?/Dg"49.  
    "intensity (W/ cm&sup2;)", @y }BWT21'-Y  
    y2: 0, 1.3 * N_Tm H}cq|hodn  
    frame IOY<'t+  
    hx PQrc#dfc |  
    hy k!V@Q!>,  
    eWr2UXv$  
    f: N_dop(1, x * um,0),      !掺杂浓度的径向分布 1nR\ m+{  
      yscale = 2, 39bw,lRPV  
      color = gray, Ae* 6&R4  
      width = 3, =J`M}BBx  
      maxconnect = 1, i|xC#hV  
      "N_dop (right scale)" ub]s>aqy   
    %-L T56T  
    f: I(pump, -1, x *um, 0) * cm^2,    !泵浦光沿光纤径向的强度分布 MDoV84Fh  
      color = red, OCu/w1 bc  
      maxconnect = 1,           !限制图形区域高度,修正为100%的高度 ,rX|_4 n*  
      width = 3, oml^f~pm  
      "pump" 6J <.i  
     V*W H  
    f: I(signal_fw, -1,x * um, 0) * cm^2,  !信号光沿光纤径向的强度分布 {$I1(DYN  
      color = blue, Ry40:;MYN  
      maxconnect = 1, 'yR\%#s6  
      width = 3, ;( (|0Xa  
      "signal" :Q}Zb,32  
    L]E.TvM1*  
    K.Y.K$NjP{  
    ; ------------- QsBC[7<jd-  
    diagram 5:                                  !输出图表5 P1&Irwb`  
    i.gagb  
    "TransitionCross-sections" _adW>-wQ!d  
    |Es,$  
    I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) GHQm$|3I  
    ) 3ZkKv;zY  
    x: 1450, 2050 $ve*j=p  
    "wavelength(nm)", @x kBtzJ#j B  
    y: 0, 0.6 8{)N%r  
    "cross-sections(1e-24 m&sup2;)", @y sj&1I.@,>  
    frame n2Y a'YF  
    hx W^i[7 r  
    hy |Y30B,=M  
    usw(]CnH  
    f: s12_Tm(x * nm) /1e-24,      !Tm3+吸收截面与波长的关系 v?l*jr1-2  
      color = red, |=[. _VH1  
      width = 3, cvC 7#i[G  
      "absorption" KB$Y8[  
    f: s21_Tm(x * nm) /1e-24,  !Tm3+发射截面与波长的关系 C_&ZQlgQ  
      color = blue, QO %;%p*  
      width = 3, \=H+m%  
      "emission" {[bB$~7Eu  
    %<1_\N7  
     
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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