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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
    (* 0,M1Q~u%.  
    Demo for program"RP Fiber Power": thulium-doped fiber laser, Afao Fn+  
    pumped at 790 nm. Across-relaxation process allows for efficient [7+dZL[  
    population of theupper laser level. s6HfN'  
    *)            !(*  *)注释语句 J69B1Yi  
    B.ar!*X  
    diagram shown: 1,2,3,4,5  !指定输出图表 a(|,KWHn  
    ; 1: "Powersvs. Position"     !分号是注释;光纤长度对功率的影响 ,enU`}9V*  
    ; 2:"Variation of the Pump Power"  !泵浦光功率变化对信号输出功率的影响 Lk8NjK6  
    ; 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 Dxx`<=&g  
    ; 4:"Transverse Profiles"             !横向分布,横坐标为半径位置 y7LT;`A  
    ; 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 AfqthI$*m  
    ns}"[44C}l  
    include"Units.inc"         !读取“Units.inc”文件中内容 ,nnVHBN  
    r)/nx@x  
    include"Tm-silicate.inc"    !读取光谱数据 4)OM58e}  
    ]*\m@lWu  
    ; Basic fiberparameters:    !定义基本光纤参数 ZL^ svGy  
    L_f := 4 { fiberlength }      !光纤长度 w.0:#4  
    No_z_steps := 50 {no steps along the fiber } !光纤步长,大括号{ }是注释,相当于备注 Ar iW&E  
    r_co := 6 um { coreradius }                !纤芯半径 jv5Os-  
    N_Tm := 100e24 { Tmdoping concentration }  !纤芯Tm离子掺杂浓度 I7@g,~s  
    &LM ^,xx}  
    ; Parameters of thechannels:                !定义光信道 d2=Z=udd  
    l_p := 790 nm {pump wavelength }                !泵浦光波长790nm )m4O7'2G  
    dir_p := forward {pump direction (forward or backward) }   !前向泵浦 bPhbd  
    P_pump_in := 5 {input pump power }                    !输入泵浦功率5W uHu(   
    w_p := 50 um {radius of pump cladding }               !包层泵浦相应的半径 50um W%&'EJ)62  
    I_p(r) := (r <=w_p) { pump intensity profile }          !泵浦光强度分布 t^KoqJ  
    loss_p := 0 {parasitic losses of pump wave }           !泵浦光寄生损耗为0 tI;pdR]  
    *(*3/P4D  
    l_s := 1940 nm {signal wavelength }                   !信号光波长1940nm qR>"r"Fq  
    w_s := 7 um                          !信号光的半径 ~L3]Wa.  
    I_s(r) := exp(-2 *(r / w_s)^2)            !信号光的高斯强度分布 0f]LOg  
    loss_s := 0                            !信号光寄生损耗为0 D@ R>gqb  
    S mjg[  
    R_oc := 0.70 {output coupler reflectivity (right side) }      !输出耦合反射率 $Eh8s(  
    q7-.-k<dQ  
    ; 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  ET:B"  
    calc <RPy   
      begin 25-5X3(>j=  
        global allow all;                   !声明全局变量 LI/;`Y=  
        set_fiber(L_f, No_z_steps, '');        !光纤参数 Ej7>ywlW  
        add_ring(r_co, N_Tm); dLnu\bSF  
        def_ionsystem();              !光谱数据函数 yG%<LP2p@f  
        pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  !泵浦光信道 & ~*qTojj  
        signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      !前向信号光信道 @!MhVNS_<  
        signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    !后向信号光信道 \8HLQly|@  
        set_R(signal_fw, 1, R_oc);                                 !设置反射率函数 /N?vVp  
        finish_fiber();                                   q(YFt*(;w  
      end; @2eV^eO9  
    'D1Sm&M2%e  
    ; Display someoutputs in the Output window (on the right side): !在Output aera区域显示输出 &8^ch,+pD  
    show "Outputpowers:"                                   !输出字符串Output powers: 4Bc<  
    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) WymBjDos:  
    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) zJCm0HLJ  
    Gi*GFv%xB  
    XDM~H  
    ; ------------- (}:n#|,{M  
    diagram 1:                   !输出图表1 wn-{V kpm  
     SK&?s`  
    "Powers vs.Position"          !图表名称 Bx&F*a;5  
    (RtjD`e}  
    x: 0, L_f                      !命令x: 定义x坐标范围 }M+2 ,#l  
    "position infiber (m)", @x      !x轴标签;@x 指示这些字符串沿坐标轴放置 ZZJXd+Q}  
    y: 0, 15                      !命令y: 定义y坐标范围 ^>H+#@R  
    y2: 0, 100                    !命令y2: 定义第二个y坐标范围 eKj'[2G@/  
    frame          !frame改变坐标系的设置 ;p U=>  
    legpos 600, 500  !图行在图表窗口中的位置(相对于左上角而言) 'CkN  
    hx             !平行于x方向网格 &GetRDr  
    hy              !平行于y方向网格 A0hfy|1#L  
    F A#?+kd  
    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 jh|4Y(  
      color = red,  !图形颜色 rDvz2p"R  
      width = 3,   !width线条宽度 7=gv4arRwt  
      "pump"       !相应的文本字符串标签 K0bh;I  
    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 y!;PBsU%Sx  
      color = blue,     fvUD'sx  
      width = 3, =Lyo]8>,X  
      "fw signal" Uq8=R)1<|d  
    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 !o k6*m  
      color = blue, jj&4Sv#>  
      style = fdashed, 1FO T  
      width = 3, J|D$  
      "bw signal" [Q+qu>&HB7  
    iH#b"h{w  
    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 3-T}8VsiP  
      yscale = 2,            !第二个y轴的缩放比例 ag \d4y6  
      color = magenta, 3>I   
      width = 3, 01P ~K|s  
      style = fdashed, QV@NA@;XZ  
      "n2 (%, right scale)" i$Sq.NU  
    dU4G!  
    f: 100 * n(x, 3),          !n(x ,3) 函数是计算x位置处激活粒子数在能级3上的占比 ZX Sl+k .  
      yscale = 2, #ErIot  
      color = red, OSsxO(;g  
      width = 3, nfV32D|3  
      style = fdashed, l`}Ag8Q  
      "n3 (%, right scale)" cIIt ;q[  
    k;?Oi?]  
    dT9ekNQB  
    ; ------------- uDZ$'a  
    diagram 2:                    !输出图表2 +.RC{o,  
    yQXHEB  
    "Variation ofthe Pump Power" (^Q:zU  
    {#c* *' 4  
    x: 0, 10 C;3>q*Am4  
    "pump inputpower (W)", @x MGmUgc  
    y: 0, 10 ca!=D $  
    y2: 0, 100 =`l).GnN2`  
    frame 27NhYDo  
    hx dK=<%)N  
    hy y+P iH  
    legpos 150, 150 { fmY_T[Q8  
    {0#p,l  
    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 b(Ev:  
      step = 5, N{(Q,+ ~  
      color = blue, nnZ|oEF  
      width = 3, DjX*2O  
      "signal output power (W, leftscale)",     !相应的文本字符串标签 8jnz;;|  
      finish set_P_in(pump, P_pump_in) ,;2x.We  
    )/hb9+S  
    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 N1LZXXY{  
      yscale = 2, "^~>aVuXf  
      step = 5, z>f>B6  
      color = magenta, ET&Q}UOE  
      width = 3, @?w8XHEa|  
      "population of level 2 (%, rightscale)", a^*@j:[  
      finish set_P_in(pump, P_pump_in) {cNH|  
    qQ_o>+3VAy  
    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 )cMW,  
      yscale = 2, #\[((y:q  
      step = 5, .i7bI2^  
      color = red, _l`s}yC  
      width = 3, @Ik@1  
      "population of level 3 (%, rightscale)", LZCziW  
      finish set_P_in(pump, P_pump_in) u,d@ oF(=  
    qGE?[\t[6  
    }- Jw"|^W  
    ; ------------- `z=I}6){  
    diagram 3:                         !输出图表3 bIP'(B#1K  
    ;plzJ6>  
    "Variation ofthe Fiber Length" [S}o[v\  
    B@,L83  
    x: 0.1, 5 Q &Rj)1!  
    "fiber length(m)", @x !~{AF|2f  
    y: 0, 10 OOEmXb]8  
    "opticalpowers (W)", @y 7DU"QeLeb  
    frame ?w}E/(r  
    hx Fn8d;%C  
    hy ?s<'3I{F`  
    w/KCu W<  
    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 v@43 %`"Gj  
      step = 20,             bBQ1 ~ R  
      color = blue, [8k7-}[  
      width = 3, TB]B l.  
      "signal output" kpM5/=f/@  
    m,e @bJ-  
    ;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 MSm vQ  
       step = 20, color = red, width = 3,"residual pump" %5=XszS  
    \(lt [=  
    ! set_L(L_f) {restore the original fiber length } $lj1924?^  
    2EubMG  
    4s<*rKm~  
    ; ------------- vG'JMzAm  
    diagram 4:                                  !输出图表4 ndkV(#wQS  
    t(4%l4i;X  
    "TransverseProfiles" U!"+~d)  
    2WjQ-mM#  
    I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) N/A.1W  
    qY24Y   
    x: 0, 1.4 * r_co /um 9w -t9X>X  
    "radialposition (µm)", @x cS98%@DR  
    y: 0, 1.2 * I_max *cm^2 6#+&_ #9  
    "intensity (W/ cm&sup2;)", @y Rx$5#K!%M  
    y2: 0, 1.3 * N_Tm T4`.rnzyRb  
    frame 6g*B=d(j  
    hx I$4GM  
    hy Kq|L: Z  
    &~+lXNXF  
    f: N_dop(1, x * um,0),      !掺杂浓度的径向分布 Vwp fkD`  
      yscale = 2, V4GcW|P4y  
      color = gray, 2\ /(!n  
      width = 3, taXS>*|B  
      maxconnect = 1, TxYxB1C)  
      "N_dop (right scale)" L;=<d  
    JJ3(0 +  
    f: I(pump, -1, x *um, 0) * cm^2,    !泵浦光沿光纤径向的强度分布 FAVw80?5k  
      color = red, uj$b/I>.'  
      maxconnect = 1,           !限制图形区域高度,修正为100%的高度 t)74(  
      width = 3, -Cxk#-sb#  
      "pump" O2E6F^.pYw  
    j+:q:6=  
    f: I(signal_fw, -1,x * um, 0) * cm^2,  !信号光沿光纤径向的强度分布 NZ `( d  
      color = blue, A]2zK?|s  
      maxconnect = 1, vcsi @!   
      width = 3, ?]}1FP  
      "signal" T<\Q4Coth  
    { Slc6$  
    I\O<XJO)_  
    ; ------------- ~S)o ('  
    diagram 5:                                  !输出图表5 :qi"I;=6  
    i,BE]w  
    "TransitionCross-sections" QDS=M]  
    0n S69tH  
    I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) ~Rx[~a  
    d#.9!m~.  
    x: 1450, 2050 |q5R5 mQ  
    "wavelength(nm)", @x Kw}-<y  
    y: 0, 0.6 xI}h{AF7  
    "cross-sections(1e-24 m&sup2;)", @y UBp0;)-  
    frame )/h~csy:~  
    hx xtyzy@)QL  
    hy K oPTY^  
    ]R/VE"-  
    f: s12_Tm(x * nm) /1e-24,      !Tm3+吸收截面与波长的关系 ]sJWiIe.  
      color = red, m M!H}|  
      width = 3, 2E^zQ>;01  
      "absorption" m/sAYF"  
    f: s21_Tm(x * nm) /1e-24,  !Tm3+发射截面与波长的关系 `#hdb=3  
      color = blue, 6;U]l.  
      width = 3, oJw~g [  
      "emission" 'u$e2^  
    5An| #^]  
     
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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