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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
    (* c\ lkD-\  
    Demo for program"RP Fiber Power": thulium-doped fiber laser, ?<'}r7D   
    pumped at 790 nm. Across-relaxation process allows for efficient "1 M[5\Ax  
    population of theupper laser level. ;;N9>M?b  
    *)            !(*  *)注释语句 ^ (zYzd  
    9mTJ|sN:e  
    diagram shown: 1,2,3,4,5  !指定输出图表 |8tilOqI  
    ; 1: "Powersvs. Position"     !分号是注释;光纤长度对功率的影响 }Kbb4]t|"  
    ; 2:"Variation of the Pump Power"  !泵浦光功率变化对信号输出功率的影响 *CI#+P  
    ; 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 | h#u^v3  
    ; 4:"Transverse Profiles"             !横向分布,横坐标为半径位置 81 sG  
    ; 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 '$%l7  
    wi6 ~}~%  
    include"Units.inc"         !读取“Units.inc”文件中内容 iqQD{SRt{  
    wcY? rE9  
    include"Tm-silicate.inc"    !读取光谱数据 ?2Py_gkf  
    2a Q[zK  
    ; Basic fiberparameters:    !定义基本光纤参数 P\rg" 3  
    L_f := 4 { fiberlength }      !光纤长度 UrEs4R1#  
    No_z_steps := 50 {no steps along the fiber } !光纤步长,大括号{ }是注释,相当于备注 vnZC,J `  
    r_co := 6 um { coreradius }                !纤芯半径 !." D]i;  
    N_Tm := 100e24 { Tmdoping concentration }  !纤芯Tm离子掺杂浓度 7! INkH]  
    ]|P iF+  
    ; Parameters of thechannels:                !定义光信道 q'Tf,a  
    l_p := 790 nm {pump wavelength }                !泵浦光波长790nm q9r[$%G  
    dir_p := forward {pump direction (forward or backward) }   !前向泵浦 3m!X/u  
    P_pump_in := 5 {input pump power }                    !输入泵浦功率5W n[Y~]  
    w_p := 50 um {radius of pump cladding }               !包层泵浦相应的半径 50um .jjG(L  
    I_p(r) := (r <=w_p) { pump intensity profile }          !泵浦光强度分布 A*547=M/(j  
    loss_p := 0 {parasitic losses of pump wave }           !泵浦光寄生损耗为0 ;u46Z  
    mSl.mi(JiZ  
    l_s := 1940 nm {signal wavelength }                   !信号光波长1940nm > jc [nk  
    w_s := 7 um                          !信号光的半径 pJ'"j 6Q  
    I_s(r) := exp(-2 *(r / w_s)^2)            !信号光的高斯强度分布 0[?Xxk}s0  
    loss_s := 0                            !信号光寄生损耗为0 fSvM(3Y<Qh  
    dE{dZ#Jfi  
    R_oc := 0.70 {output coupler reflectivity (right side) }      !输出耦合反射率 9 X`Sm}i  
    jLHkOk5{:  
    ; 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 @>Km_Ax  
    calc 3K0A)W/YEs  
      begin 5f K_Aq{  
        global allow all;                   !声明全局变量 _H7x9 y=  
        set_fiber(L_f, No_z_steps, '');        !光纤参数 PmEsN&YP]  
        add_ring(r_co, N_Tm); Zw S F^  
        def_ionsystem();              !光谱数据函数 EDl!w:  
        pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  !泵浦光信道 V#gK$uv  
        signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      !前向信号光信道 ^KT Y?  
        signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    !后向信号光信道 !9VY|&fHe  
        set_R(signal_fw, 1, R_oc);                                 !设置反射率函数 rlSeu5X6  
        finish_fiber();                                   Vd+T$uC  
      end; O ^duZ*b  
    ywmo#qYe  
    ; Display someoutputs in the Output window (on the right side): !在Output aera区域显示输出 ,G?WAOy,  
    show "Outputpowers:"                                   !输出字符串Output powers: E,x+JeKV  
    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) `%9 uE(  
    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) TpwkD_fg  
    czgO ;3-C  
    9`X\6s  
    ; ------------- [uN? ~lp\%  
    diagram 1:                   !输出图表1 u(F_oZ~  
    bUdLs.:  
    "Powers vs.Position"          !图表名称 fW1CFRHH  
    %axh`xK#  
    x: 0, L_f                      !命令x: 定义x坐标范围 }?_?V&K|  
    "position infiber (m)", @x      !x轴标签;@x 指示这些字符串沿坐标轴放置 ,77d(bR<  
    y: 0, 15                      !命令y: 定义y坐标范围 w(3G&11N?  
    y2: 0, 100                    !命令y2: 定义第二个y坐标范围 yfjWbW  
    frame          !frame改变坐标系的设置 ?(F6#"/E  
    legpos 600, 500  !图行在图表窗口中的位置(相对于左上角而言) j[G  
    hx             !平行于x方向网格 17"uf.G  
    hy              !平行于y方向网格 VSI9U3t3w  
    Zbt.t] N  
    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 S3*`jF>q  
      color = red,  !图形颜色 tOd&!HYL  
      width = 3,   !width线条宽度 _P 3G  
      "pump"       !相应的文本字符串标签 lc1(t:"[  
    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 hPkWCoQpq  
      color = blue,     }"P|`"WW  
      width = 3, &4x}ppX  
      "fw signal" #3@rS  
    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 7p16Hv7y~  
      color = blue, 5o'FS{6U  
      style = fdashed, RVA (Q[ ;  
      width = 3, c&?m>2^6  
      "bw signal" l<LP&  
    03qQ'pq  
    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 %i9E @EV  
      yscale = 2,            !第二个y轴的缩放比例 RSyUaA  
      color = magenta, %G/ hD  
      width = 3, K6/Q}W   
      style = fdashed, )D5"ap]fX  
      "n2 (%, right scale)" u=?.}Pj  
    rv^@,8vq  
    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 Fg5kX  
      yscale = 2, ~"&|W'he[  
      color = red, 2Aazy'/  
      width = 3, v6M6>&RR|  
      style = fdashed, t~EPn.  
      "n3 (%, right scale)" Vvn2 Ep  
     gmO!  
    qn<|-hA*  
    ; ------------- k"T}2 7  
    diagram 2:                    !输出图表2 wOEj)fp .  
    ?FeYN+qR  
    "Variation ofthe Pump Power" V6&!9b  
    L_uVL#To  
    x: 0, 10 l|~A#kq  
    "pump inputpower (W)", @x \K{0L  
    y: 0, 10 UXc-k  
    y2: 0, 100 ug!s7fo^  
    frame 7$vYo _  
    hx Pw7]r<Q  
    hy nQX:T;WL@  
    legpos 150, 150 q77;ZPfs8  
    Utj&]RELK  
    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 1EO7H{E=  
      step = 5, 8>2.UrC  
      color = blue, b8`)y<7  
      width = 3, M=.n7RY-  
      "signal output power (W, leftscale)",     !相应的文本字符串标签 [LjT*bi  
      finish set_P_in(pump, P_pump_in) g:'xae/]S  
    qPX~@^`9  
    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 L O_k@3  
      yscale = 2, \ =?a/  
      step = 5, '8RsN-w  
      color = magenta, UqFO|r"M  
      width = 3, h:b)Wr  
      "population of level 2 (%, rightscale)", R[h9"0Y^  
      finish set_P_in(pump, P_pump_in) xjuN-  
    8`q:Gz=M\  
    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 t9kzw*U9  
      yscale = 2, $<dH?%!7  
      step = 5, AW%#O\N  
      color = red, <y2U3; t  
      width = 3, fn jPSts0  
      "population of level 3 (%, rightscale)", IXMop7~  
      finish set_P_in(pump, P_pump_in) u<7/0;D#+  
    *KZYv=s,u  
    ?yrX)3hyH  
    ; ------------- =t#llgi~  
    diagram 3:                         !输出图表3 iW]j9}t  
    }W C[$Y_@  
    "Variation ofthe Fiber Length" [64:4/<}  
    '%s.^kn  
    x: 0.1, 5 sQ UM~HD\a  
    "fiber length(m)", @x P%V'4p c  
    y: 0, 10 zsEc(  
    "opticalpowers (W)", @y E<{ R.r  
    frame rKe2/4>0X  
    hx q~b  &  
    hy Go`vfm"S  
    j78i #}e  
    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 VZp5)-!\  
      step = 20,             ,uSMQS-O'4  
      color = blue, &n}]w+w  
      width = 3, e&|'I"  
      "signal output" lK?uXr7^  
    :T ^a&)aL%  
    ;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 }/0X'o  
       step = 20, color = red, width = 3,"residual pump" 7X`g,b!  
    <prk8jSWV  
    ! set_L(L_f) {restore the original fiber length } 1*P~!2h  
    'Cb6Y#6  
    8l>?Pv  
    ; ------------- h"[AOfTE$  
    diagram 4:                                  !输出图表4 zq 3\}9  
    JK7G/]j+Ez  
    "TransverseProfiles" ,Q3T Tno ,  
    afCW(zH p  
    I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) 5N#aXG^9  
    6+:iy'-  
    x: 0, 1.4 * r_co /um a(m2n.0'>  
    "radialposition (µm)", @x b <tNk]7  
    y: 0, 1.2 * I_max *cm^2 N~nziY*C,*  
    "intensity (W/ cm&sup2;)", @y NJ%P/\ C  
    y2: 0, 1.3 * N_Tm KaLzg5is  
    frame k%]3vRo<  
    hx f$o_e90mu  
    hy SpIv#?  
    |QF7 uV  
    f: N_dop(1, x * um,0),      !掺杂浓度的径向分布 &pxg. 3  
      yscale = 2, W- $Z(Z XL  
      color = gray, E'f{i:O "~  
      width = 3, o3XvRj  
      maxconnect = 1, *[Imn\hu  
      "N_dop (right scale)" 7zl5yK N  
    2,y|EpG#  
    f: I(pump, -1, x *um, 0) * cm^2,    !泵浦光沿光纤径向的强度分布 [CTnXb  
      color = red, mtpeRVcF  
      maxconnect = 1,           !限制图形区域高度,修正为100%的高度 F0m-23[H  
      width = 3, ^7`BP%6  
      "pump" (=FRmdeYl1  
    (fhb0i-  
    f: I(signal_fw, -1,x * um, 0) * cm^2,  !信号光沿光纤径向的强度分布 s2a{>II6  
      color = blue, j}#w )M  
      maxconnect = 1, kl" hBK#D%  
      width = 3, W Tcw4  
      "signal" SjK  
    h<h%*av|  
    %6t:(z  
    ; -------------  }t!Gey  
    diagram 5:                                  !输出图表5 lPe&h]@ >  
    7kC^ 30@T3  
    "TransitionCross-sections" !@5 9)  
    ^23~ZHu  
    I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) 5frX   
    ~kV/!=  
    x: 1450, 2050 ynp8r f  
    "wavelength(nm)", @x ,10=  
    y: 0, 0.6 0RzEY!9g+  
    "cross-sections(1e-24 m&sup2;)", @y l&[O  
    frame HGl|-nW>  
    hx S0$8@"~=  
    hy "6A ` q\  
    |o7[|3:M  
    f: s12_Tm(x * nm) /1e-24,      !Tm3+吸收截面与波长的关系 [=C6U_vU  
      color = red, g/4[N{Xf  
      width = 3, O/^ %2mG  
      "absorption" //B&k`u  
    f: s21_Tm(x * nm) /1e-24,  !Tm3+发射截面与波长的关系 pG_;$8Hc  
      color = blue, ]iVcog"T  
      width = 3, }ZYd4h|g\z  
      "emission" ^ "E^zHM(  
    -+-?w|}qV  
     
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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