[原创]RP Fiber Power仿真设计掺铥光纤激光器代码详解 [复制链接]

(* %$xFnGb  
Demo for program"RP Fiber Power": thulium-doped fiber laser, !gf3%!%  
pumped at 790 nm. Across-relaxation process allows for efficient X8x>oV;8  
population of theupper laser level. eFI4(Y  
*)            ！（*  *）注释语句 *$$V,6O.  
fdG.=7`  
diagram shown: 1,2,3,4,5  ！指定输出图表 mD)O\.uA  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 @
GtZK  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 ACYn87tq  
; 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 fO>~V1  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 Z5[:Zf?h7J  
; 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 [;Ac
V73  
[ d7]&i}*|  
include"Units.inc"         ！读取“Units.inc”文件中内容 6w;|-/:`  
" G6jUTt  
include"Tm-silicate.inc"    ！读取光谱数据 %Ab_PAw  
>pvg0Fh  
; Basic fiberparameters:    ！定义基本光纤参数 }z+"3A|  
L_f := 4 { fiberlength }      ！光纤长度 hY 2PV7"[;  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 n^02@Aw  
r_co := 6 um { coreradius }                ！纤芯半径 p&mtKLv  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 30E v"  
[Mc5N  
; Parameters of thechannels:                ！定义光信道 7~nCK  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm vqi$}=%n?W  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 9nS!  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W l|em E ^  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um veg!mY2&  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 ok2~B._+;  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 H`lD@q'S  
ja- ~`  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm Au
ipK*&g  
w_s := 7 um                          ！信号光的半径 c|( ?  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 a BH1J]_  
loss_s := 0                            ！信号光寄生损耗为0 'a^tL[rLP1  
8G] m7Z  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 b|o!&9Yyr  
E2H
<{Q   
; Function for defining themodel:   ！定义模型函数，一定要有calc命令，否则函数只会被定义，但不会被执行 \N , '+  
calc 2\B9o `Y  
  begin >TnQ4^;v.  
    global allow all;                   ！声明全局变量 E0^%|Mh]b  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 YQdX>k  
    add_ring(r_co, N_Tm); H&Y{jqua  
    def_ionsystem();              ！光谱数据函数 cNlY=L  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 \Fg6b6  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 ?VP!1O=J  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 <Iyot]E  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 ZWRRh^  
    finish_fiber();                                   .`>
l.gmi&  
  end; 0/
@ X!|X  
355Sd;*  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 F*JvpI[7n  
show "Outputpowers:"                                   ！输出字符串Output powers： 5vX8mPR_  
show"pump:     ", P_out(pump):d3:"W"  ！输出字符串pump：和计算值（格式为3个有效数字，单位W） |EV\a[  
show"signal:   ",P_out(signal_fw):d3:"W" ！输出字符串signal：和计算值（格式为3个有效数字，单位W） l()MYuLNV  
qJXsf M6  
pNE\@U|4E  
; ------------- k7|z$=zY  
diagram 1:                   !输出图表1 fb.\V]K  
W#jZRviyq!  
"Powers vs.Position"          ！图表名称 W
({TC  
-F+P;S  
x: 0, L_f                      ！命令x: 定义x坐标范围 {_XrZ(y/  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 tK|9qs<%  
y: 0, 15                      ！命令y: 定义y坐标范围 -N7L#a  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 hdr}!wV  
frame          ！frame改变坐标系的设置 lAn+gDP  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） DxKfWb5 R  
hx             ！平行于x方向网格 Wd` QpW  
hy              ！平行于y方向网格 SU%rWH  
,)rZAI  
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 ?(/j<,m^  
  color = red,  ！图形颜色 yOUX E>-  
  width = 3,   ！width线条宽度 iQ|,&K0d]  
  "pump"       ！相应的文本字符串标签 leES YSY:  
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 k'ZUBTRq!  
  color = blue,     '`]n_$f'  
  width = 3, &H4uvJ_<  
  "fw signal" !q$&JZY  
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 ?l, X!o6  
  color = blue, O/Y\ps3r  
  style = fdashed, 12tJr
S*Z  
  width = 3, ewAH'H]o  
  "bw signal" JU'WiR bcb  
:qAc= IC%  
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 XnE %$NJ  
  yscale = 2,            ！第二个y轴的缩放比例 -4?xwz9o$7  
  color = magenta, wAu[pWD'6;  
  width = 3, cNuHXaWp  
  style = fdashed, EO].qN-8  
  "n2 (%, right scale)" S"P9Nf?9  
S?
Bc~y  
f: 100 * n(x, 3),          ！n(x ,3) 函数是计算x位置处激活粒子数在能级3上的占比 %R5Com  
  yscale = 2, dgco*TIGO  
  color = red, pG!(6V-x<E  
  width = 3, &gA6+b'  
  style = fdashed, -OrY{^F  
  "n3 (%, right scale)"  vr{'FMc  
N4a`8dS|  
B0)`wsb_  
; ------------- oI_oz0nHk  
diagram 2:                    ！输出图表2 5@ bc(H  
1iNsX\M  
"Variation ofthe Pump Power" f`hyYp`d5  
~JwpNJs  
x: 0, 10 Mhe|eD#)  
"pump inputpower (W)", @x |oe!P}u  
y: 0, 10 %XJQ0CE<(  
y2: 0, 100 |jahpji6  
frame |;A9A's  
hx U#;51_  
hy y@o9~?M  
legpos 150, 150 ptV4s=G2  
{H=oxa  
f: (set_P_in(pump, x);P_out(signal_fw)), ！set_P_in(pump,x)改变泵浦信道功率；P_out(signal_fw)输出前向信号光 x
?,~TC4  
  step = 5, 8%o~4u3  
  color = blue, Gr5`1`8|  
  width = 3, G;(onJz  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 "_K}rI6(t  
  finish set_P_in(pump, P_pump_in) ^uyNv-'F  
y#S1c)vU  
f: (set_P_in(pump,x); 100 * n_av(2)),   ！改变泵浦信号功率对能级2上激活粒子占比的影响 O9t=lrYV!  
  yscale = 2, F+ffl^BQ  
  step = 5, L]k*QIn:h  
  color = magenta, -|m$YrzG  
  width = 3,  6Xdtr  
  "population of level 2 (%, rightscale)", %{R_^Y8t  
  finish set_P_in(pump, P_pump_in) 2c}B  
Q0V^PDF  
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 |EF>Y9   
  yscale = 2, O6y @G .+  
  step = 5, +w "XNl  
  color = red, ;#3ekl{-g  
  width = 3, 7w "sJ  
  "population of level 3 (%, rightscale)", p QluGIX0V  
  finish set_P_in(pump, P_pump_in) &&X$d!V  
\Y
*!f|=of  
p1Q/g Il  
; ------------- `$J'UXtGc  
diagram 3:                         ！输出图表3 U?8i'5)  
\).Nag+  
"Variation ofthe Fiber Length" eh$G.-2N  
z>6.[Z(T  
x: 0.1, 5 5pO]vBT  
"fiber length(m)", @x gf+o1\5t@  
y: 0, 10 RNGO~:k?r  
"opticalpowers (W)", @y Js/N()X  
frame uu}'i\Q  
hx mHKJ  
hy X$/E>I  
sNL+
F  
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 I$n+DwKcN  
  step = 20,             !?jK1{E3  
  color = blue, J;S-+  
  width = 3, ]de\i=
?|  
  "signal output" $u:<x
  
O{~KR/  
;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 5i6VZv  
   step = 20, color = red, width = 3,"residual pump" pg+b[7  
\H^;'agA  
! set_L(L_f) {restore the original fiber length } W/sY
#"  
^[#=L4  
Ddb-@YD&+0  
; ------------- gt'*B5F(  
diagram 4:                                  ！输出图表4 7m\vRMK  
y>`5Kyj3-@  
"TransverseProfiles" >E,Q  
Wj&nUp{  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) ] @ufV  
#00D?nC  
x: 0, 1.4 * r_co /um QCWf.@n  
"radialposition (µm)", @x )T9~8p.  
y: 0, 1.2 * I_max *cm^2 $%Z3;:<Uf-  
"intensity (W/ cm&sup2;)", @y rS
4%$p"  
y2: 0, 1.3 * N_Tm Y~}5axSPH  
frame }w#F6  
hx ?IILt=)<  
hy J smB^  
T<P0T<  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 k=`$6(>Fz  
  yscale = 2, q(gjT^aN  
  color = gray, z|I0-1tAK  
  width = 3, }-74f  
  maxconnect = 1, X &D{5~qC  
  "N_dop (right scale)" ~q 7;8<U  
6lsEGe  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 1DqX:WM6  
  color = red, 4@h;5  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 h,t:]  
  width = 3, <[ZI.+_Wt  
  "pump" n}JPYu  
NO2(vE  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 ~@D/A/|  
  color = blue, wG8 nw;  
  maxconnect = 1, gqfDacDJL  
  width = 3, ?`H[u7*%  
  "signal" N'QqJe7Z  
,5{$+  
FAw1o  
; ------------- {~_Y _-  
diagram 5:                                  ！输出图表5 VO_dA4C}z  
:b@igZ<  
"TransitionCross-sections" CW p#^1F  
/P:EWUf'  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) :RiF3h(  
y^R4I_* z  
x: 1450, 2050 )c+k_;t'+  
"wavelength(nm)", @x DZk1Z
Lz  
y: 0, 0.6 Q+'nw9:;T  
"cross-sections(1e-24 m&sup2;)", @y ,F9nDF@)  
frame `eR 7H>I  
hx O,'#C\   
hy r[pF^y0   
N 9LgU)-Jt  
f: s12_Tm(x * nm) /1e-24,      ！Tm³⁺吸收截面与波长的关系 C6]OAUXy:F  
  color = red, m*Cu-6&qd  
  width = 3, 4-^[%&>}  
  "absorption" v+6e;xl8  
f: s21_Tm(x * nm) /1e-24,  ！Tm³⁺发射截面与波长的关系 2+Yb 7 uI,  
  color = blue, |##GIIv;i  
  width = 3, ^~1<f1
(  
  "emission" vy9dAl  
:o8MUXH$  

感谢，视频上有点看不清楚