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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
    (* ;FflEL<7Y  
    Demo for program"RP Fiber Power": thulium-doped fiber laser, vqZM89 xY  
    pumped at 790 nm. Across-relaxation process allows for efficient =Fl4tY#X  
    population of theupper laser level. CoXL;\  
    *)            !(*  *)注释语句 i>zyn-CuW  
    JjML!;  
    diagram shown: 1,2,3,4,5  !指定输出图表 jk}PucV  
    ; 1: "Powersvs. Position"     !分号是注释;光纤长度对功率的影响 }"H900WE|  
    ; 2:"Variation of the Pump Power"  !泵浦光功率变化对信号输出功率的影响 &B7KWvAy  
    ; 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 ]%hI-  
    ; 4:"Transverse Profiles"             !横向分布,横坐标为半径位置 nDw9  
    ; 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 u Aa>6R  
    x[6Bc  
    include"Units.inc"         !读取“Units.inc”文件中内容 ur7a%NH  
    x:lf=D lA  
    include"Tm-silicate.inc"    !读取光谱数据 &2pM3re/f  
    W78-'c  
    ; Basic fiberparameters:    !定义基本光纤参数 !Sh5o'D28  
    L_f := 4 { fiberlength }      !光纤长度 nz l,y,  
    No_z_steps := 50 {no steps along the fiber } !光纤步长,大括号{ }是注释,相当于备注 dL)5~V8s  
    r_co := 6 um { coreradius }                !纤芯半径 ;0q6 bp(<H  
    N_Tm := 100e24 { Tmdoping concentration }  !纤芯Tm离子掺杂浓度 @$G K<jl  
    0k<%l6Bq  
    ; Parameters of thechannels:                !定义光信道 uB5o Ghu-  
    l_p := 790 nm {pump wavelength }                !泵浦光波长790nm 1bs95Fh9Q  
    dir_p := forward {pump direction (forward or backward) }   !前向泵浦 6mLE-( Z7  
    P_pump_in := 5 {input pump power }                    !输入泵浦功率5W '8 #*U  
    w_p := 50 um {radius of pump cladding }               !包层泵浦相应的半径 50um k"zHrn"$  
    I_p(r) := (r <=w_p) { pump intensity profile }          !泵浦光强度分布 QNEaj\   
    loss_p := 0 {parasitic losses of pump wave }           !泵浦光寄生损耗为0 )6WU&0>AU8  
    Big-)7?  
    l_s := 1940 nm {signal wavelength }                   !信号光波长1940nm p?nVPTh  
    w_s := 7 um                          !信号光的半径 QLl44*@  
    I_s(r) := exp(-2 *(r / w_s)^2)            !信号光的高斯强度分布 ,1L^#?Q~  
    loss_s := 0                            !信号光寄生损耗为0 9z}kkYk  
    R!CUR~F  
    R_oc := 0.70 {output coupler reflectivity (right side) }      !输出耦合反射率 -E"o)1Pj6C  
    li^E$9oWC  
    ; 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 A???s,F_  
    calc e~dU "  
      begin -+/|  
        global allow all;                   !声明全局变量 30"G%DFd  
        set_fiber(L_f, No_z_steps, '');        !光纤参数 4HAfTQ 1G  
        add_ring(r_co, N_Tm);  ^k=[P  
        def_ionsystem();              !光谱数据函数 n1h+`nsf  
        pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  !泵浦光信道 kfV}w,  
        signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      !前向信号光信道 JJXf%o0yq  
        signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    !后向信号光信道 k2;yl _7  
        set_R(signal_fw, 1, R_oc);                                 !设置反射率函数 gO36tc:ce  
        finish_fiber();                                   ]d FWIvC  
      end; eO#)QoHj^  
     >TgO|mq  
    ; Display someoutputs in the Output window (on the right side): !在Output aera区域显示输出 ERplDSfO-  
    show "Outputpowers:"                                   !输出字符串Output powers: 4esf&-gG  
    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) d[de5Xra  
    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) qm@hD>W+  
    up6LO7drW/  
    s!Vtw p9  
    ; ------------- 9UX-)!  
    diagram 1:                   !输出图表1 S1JB]\  
    V qf}(3K0  
    "Powers vs.Position"          !图表名称 M Cz3RZK  
    [gDvAtTZ5  
    x: 0, L_f                      !命令x: 定义x坐标范围 O^GTPYW  
    "position infiber (m)", @x      !x轴标签;@x 指示这些字符串沿坐标轴放置 EBm\rM8  
    y: 0, 15                      !命令y: 定义y坐标范围 xi0&"?7la  
    y2: 0, 100                    !命令y2: 定义第二个y坐标范围 +dRTHz  
    frame          !frame改变坐标系的设置 y|ZJ-[qg  
    legpos 600, 500  !图行在图表窗口中的位置(相对于左上角而言) ~mU#u\r(*  
    hx             !平行于x方向网格 #'T@mA  
    hy              !平行于y方向网格 Bvwk6NBN  
    XUWza=BR"  
    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 dc* #?G6^  
      color = red,  !图形颜色 =`")\?z}  
      width = 3,   !width线条宽度 v{+*/NQ_  
      "pump"       !相应的文本字符串标签 KT}}=st%  
    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 .u)YZN0\  
      color = blue,     }v{F9dv  
      width = 3, <GC:aG  
      "fw signal" (1R,   
    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 zKZ6Qjd8!  
      color = blue, aOOY_S E  
      style = fdashed, *|cvx:GO  
      width = 3, );C !:?  
      "bw signal" MLJ8m  
    KMv|;yXYj4  
    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 yl*S|= 8;k  
      yscale = 2,            !第二个y轴的缩放比例 +VfJ: [q  
      color = magenta, qe0@tKim  
      width = 3, t}K?.To$  
      style = fdashed, SU1, +7"  
      "n2 (%, right scale)" HV>Wf"1  
    /lUb9&yV  
    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 [Gu]p&  
      yscale = 2, 0&Qn7L  
      color = red, ) ":~`Z*@  
      width = 3, )g-*fSa  
      style = fdashed, ky*-_  
      "n3 (%, right scale)" 2>mDT  
    YVzK$k'3U  
    +I U]=qS  
    ; ------------- WW&0FugY_  
    diagram 2:                    !输出图表2 E: %%Dm  
    s)>]'ii  
    "Variation ofthe Pump Power" edch'H^2+P  
    =,sMOJ c>  
    x: 0, 10 FT=w`NE,+  
    "pump inputpower (W)", @x -y~JNDS1]  
    y: 0, 10 tFRWxy[5  
    y2: 0, 100 tTY(I1  
    frame dJ$}]   
    hx ^0VI J)y  
    hy Ts^IA67&<  
    legpos 150, 150 O32:j   
     oo2VT  
    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 ";Lpf]<  
      step = 5, -.xs=NwB.|  
      color = blue, +* &!u=%G  
      width = 3, upWq=_  
      "signal output power (W, leftscale)",     !相应的文本字符串标签 =U?"#   
      finish set_P_in(pump, P_pump_in) FG'1;x!  
    yNO5h]o  
    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 Yx,  
      yscale = 2, gB?#T  
      step = 5, [ %r :V"  
      color = magenta, idV4hMF9  
      width = 3, Pocm.  
      "population of level 2 (%, rightscale)", jn]{|QZ  
      finish set_P_in(pump, P_pump_in) ?g!py[CrE  
    (CEJg|,  
    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 ]NN9FM.2b/  
      yscale = 2, 7D4P= $UJp  
      step = 5, 2mI=V.X[&  
      color = red, FFPO?y$  
      width = 3, kz+P?mopm  
      "population of level 3 (%, rightscale)", '9-8_;  
      finish set_P_in(pump, P_pump_in) "=HCP,  
    4"0`J  
    IGVNX2  
    ; ------------- s fazrz`h  
    diagram 3:                         !输出图表3 U<*ZY`B3  
    ze]2-B4  
    "Variation ofthe Fiber Length" =d`,W9D  
    dqnxhN+&  
    x: 0.1, 5 + 6O5hZ  
    "fiber length(m)", @x Qu!Lc:oM?  
    y: 0, 10 >lRX+?  
    "opticalpowers (W)", @y @2]_jW  
    frame lQldW|S>  
    hx ? %F*{3IP  
    hy {p+7QlgK  
    ~[Mm0L}8  
    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 J'|qFS  
      step = 20,             !|hv49!H  
      color = blue, 2BEF8o]Np  
      width = 3, 4$@)yZ  
      "signal output" ]k5l]JB  
    Ydh]EO0'  
    ;f: (set_L(x);P_out(pump)),                     !改变光纤长度对泵浦信号输出功率的影响 J)6f"{} &  
       step = 20, color = red, width = 3,"residual pump" nUD)G<v  
    ggfL d r  
    ! set_L(L_f) {restore the original fiber length } Av]<[ F/  
    L+bU~N,+A  
    t(}\D]mj  
    ; ------------- '*|Wi}0R  
    diagram 4:                                  !输出图表4 # KK>D?.:  
    =.f]OWehu.  
    "TransverseProfiles" (pNA8i%=G  
    5Jlz$]f  
    I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) F`r=M%yh  
    eo4;?z  
    x: 0, 1.4 * r_co /um ~bhesWk8!  
    "radialposition (µm)", @x d\+smED  
    y: 0, 1.2 * I_max *cm^2 wz<YflF  
    "intensity (W/ cm&sup2;)", @y ojni+}>_  
    y2: 0, 1.3 * N_Tm ?>LsIPa  
    frame \E5%.KR  
    hx uAwT)km {  
    hy QG$LbuZ`  
    d~u+:[\=/  
    f: N_dop(1, x * um,0),      !掺杂浓度的径向分布 iZ yhj%#  
      yscale = 2, !inonR  
      color = gray, =rFgOdj  
      width = 3, "z8L}IC!e5  
      maxconnect = 1, q4C$-W%rj  
      "N_dop (right scale)" J.N%=-8  
    IDyf9Zra?  
    f: I(pump, -1, x *um, 0) * cm^2,    !泵浦光沿光纤径向的强度分布 be}^}w=  
      color = red, 8&\<p7}=h  
      maxconnect = 1,           !限制图形区域高度,修正为100%的高度 >LRt,.hy6  
      width = 3, Ox#%Dm2  
      "pump" m_wBRan  
    n(\5Z&  
    f: I(signal_fw, -1,x * um, 0) * cm^2,  !信号光沿光纤径向的强度分布 E=+v1\t)]  
      color = blue, ]#z^G  
      maxconnect = 1, UJ3l8 %/`k  
      width = 3, ov.7FZ+  
      "signal" 21_>|EKp  
     A M8bem~  
    <05\  
    ; ------------- \#Ez["mD  
    diagram 5:                                  !输出图表5 %{Ez0XwGCn  
    Q&S\?cKe  
    "TransitionCross-sections" I'%vN^e^  
     Gqvj  
    I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) 481J=8H  
    t&MJSFkiA  
    x: 1450, 2050 ~ x- R78'  
    "wavelength(nm)", @x {B8W>>E  
    y: 0, 0.6 gh>'O/9  
    "cross-sections(1e-24 m&sup2;)", @y A6v<+`?  
    frame $\h\, N$y  
    hx r PWn  
    hy a/Z >-   
    R`sU5:n  
    f: s12_Tm(x * nm) /1e-24,      !Tm3+吸收截面与波长的关系 , g\%P5  
      color = red, |7KW'=O  
      width = 3, \W Kly  
      "absorption" x2/L`q"M?=  
    f: s21_Tm(x * nm) /1e-24,  !Tm3+发射截面与波长的关系 u?6L.^Op  
      color = blue, G41 gil6k  
      width = 3, 5RD\XgyN]  
      "emission" b.V\E Ok  
    -F\xZ  
     
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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