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

(* y$6~&X  
Demo for program"RP Fiber Power": thulium-doped fiber laser, L j>HZS$F  
pumped at 790 nm. Across-relaxation process allows for efficient vS'l@`Eg]  
population of theupper laser level. j8#xNA  
*)            ！（*  *）注释语句 ! uX0G4  
FQW{c3%qZ  
diagram shown: 1,2,3,4,5  ！指定输出图表 vnOl-`Z ~  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 ;2%8tV$V  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 GZCX
m+  
; 3:"Variation of the Fiber Length"！信号输出功率vs 光纤长度的变化，仿真最佳光纤长度 Lk>o`<*  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 "-afHXED  
; 5:"Transition Cross-sections"    ！不同波长的跃迁横截面，横坐标波长，纵坐标为横截面  L$Yg*]\  
F*rsi7#!pG  
include"Units.inc"         ！读取“Units.inc”文件中内容 3tu:Vc.:M  
"B3&v%b  
include"Tm-silicate.inc"    ！读取光谱数据 Q$XNs%7w5,  
Oi-= Fp  
; Basic fiberparameters:    ！定义基本光纤参数 Wi%e9r{hU  
L_f := 4 { fiberlength }      ！光纤长度 6#za\[  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 -gK*&n~  
r_co := 6 um { coreradius }                ！纤芯半径 Iq["(!7E5  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 H{CiN  
wJ Qm7n-+  
; Parameters of thechannels:                ！定义光信道 ]**h`9MF  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm :Cdqj0O3u  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 PqVz^(Wz  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W g;mX{p_@  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um +pG[ [}/  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 cf`g.9pjlx  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 {;-wXzv`  
iPeW;=-2Wk  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm }eq*dr1`  
w_s := 7 um                          ！信号光的半径 X4I+  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 v-ZTl4j$  
loss_s := 0                            ！信号光寄生损耗为0 u|{(m_"H  
b<E+5;u  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 4157!w'\y  
" .<>(bE  
; 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 7A
dg;  
calc "%E<%g  
  begin %ZbdWHO#  
    global allow all;                   ！声明全局变量 )~2~q7  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 M,we9];N  
    add_ring(r_co, N_Tm); 67D{^K"KT  
    def_ionsystem();              ！光谱数据函数 [ @ASAhV^+  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 V7(-<})8  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 LTlbrB  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 ;6AanwR6  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 b9RJ>K  
    finish_fiber();                                   )&vuT q'7'  
  end; V ah&)&n  
ec3zoKtV  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 `W9~u: F  
show "Outputpowers:"                                   ！输出字符串Output powers： X`JoXNqm  
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） k(ho?  
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） K=N8O8R$y  
U~I y),5  
aExt TE  
; ------------- 4H*M^?h\#  
diagram 1:                   !输出图表1 ?"-1QG  
Ou7nk:I@  
"Powers vs.Position"          ！图表名称 E]dc4US  
1uco{JX<S  
x: 0, L_f                      ！命令x: 定义x坐标范围 ifI0s)Pn  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 0`KR8# A@  
y: 0, 15                      ！命令y: 定义y坐标范围 D5"Xjo*  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 8T5W6Zs1  
frame          ！frame改变坐标系的设置 z2~\ b3G  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） 9}A\BhtiM  
hx             ！平行于x方向网格 6lob&+  
hy              ！平行于y方向网格 BT^HlW<  
":!1gC  
f: P(pump, x),    ！命令f: 定义函数图；P(pump, x)函数是计算x位置处的泵浦光功率 u9u'!hAGH  
  color = red,  ！图形颜色 Nh[H[1"J  
  width = 3,   ！width线条宽度 ~c`%k>$  
  "pump"       ！相应的文本字符串标签 }uiD8b{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 kca
#ssN  
  color = blue,     I3;03X<2  
  width = 3, P!u0_6  
  "fw signal" fLg :+Ue<B  
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 !QlCt>{  
  color = blue, aI
o%~
w  
  style = fdashed, G#YBfPmr  
  width = 3, K1CgM1v  
  "bw signal" 45
Lzq6  
BG_6$9y  
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 4w#:?Y _\[  
  yscale = 2,            ！第二个y轴的缩放比例 )
(+q~KA}  
  color = magenta, Ij2Th]  
  width = 3, 8lFYk`|g  
  style = fdashed, sB0m^Y'  
  "n2 (%, right scale)" m+QZ|  
nm,(Wdr  
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 KG
rYF  
  yscale = 2, d+p^fBz  
  color = red, z:oi@q  
  width = 3, m:Fdgu9  
  style = fdashed, PIHKSAnq  
  "n3 (%, right scale)" eC
jyx|:J  
L, 2;-b|  
^B$cfs@*  
; ------------- j[4l'8Ek  
diagram 2:                    ！输出图表2 D<'G\#n3I=  
>02p,W6S>  
"Variation ofthe Pump Power" 8&SWQ  
'HJ<"<  
x: 0, 10 ',!>9Dj  
"pump inputpower (W)", @x Z5eM  
y: 0, 10 0[p"8+x  
y2: 0, 100 e"|ZTg+U  
frame rP IAu[],g  
hx !b?
cY{  
hy 9B/iQCFtj$  
legpos 150, 150 C8%MKNPd  
w\a6ga!xt"  
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 =w7+Yt  
  step = 5, |3BxNFe`%  
  color = blue,  0:$pJtx"  
  width = 3, e4FR)d0x  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 +5Ju `Z  
  finish set_P_in(pump, P_pump_in) piFZu/~Gq\  
gOr%N!5  
f: (set_P_in(pump,x); 100 * n_av(2)),   ！改变泵浦信号功率对能级2上激活粒子占比的影响 [Pl''[  
  yscale = 2, Y+eDE:4  
  step = 5, ]U&<y8Q_6  
  color = magenta, k\Y*tY#2  
  width = 3, F{Oaxn  
  "population of level 2 (%, rightscale)", HM
hdK  
  finish set_P_in(pump, P_pump_in) =R)w=ce  
h:i FLSf  
f: (set_P_in(pump,x); 100 * n_av(3)),   ！改变泵浦信号功率对能级3上激活粒子占比的影响 :r7!HG_  
  yscale = 2, S
a@T#%oU  
  step = 5, N]-skz<v  
  color = red, ^ywDa^;-  
  width = 3, LTuT"}dT[  
  "population of level 3 (%, rightscale)", m#<Jr:-  
  finish set_P_in(pump, P_pump_in) _k#GjAPM  
N~P1^x~  
T.W^L'L`  
; ------------- ~=9S AJr]  
diagram 3:                         ！输出图表3 `3*QKi$  
Rh%@N.Z*  
"Variation ofthe Fiber Length" ^fE8|/]nG9  
iNilk!d6Q3  
x: 0.1, 5 .)<l69ZD Z  
"fiber length(m)", @x 7rG+)kHG  
y: 0, 10 *JAC+<~d  
"opticalpowers (W)", @y 7g:Lj,Z4L  
frame Y@7n>U  
hx + Y!:@d  
hy dptfIBYc+  
5}a.<  
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| y.6v  
  step = 20,            
3p]\l ]=  
  color = blue, g_0| `Sm  
  width = 3, p_vldTIW  
  "signal output" #CcEI  
"{Hl! Zq/  
;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 /PbMt  
   step = 20, color = red, width = 3,"residual pump" gf}*}8D  
NKTy!zWh  
! set_L(L_f) {restore the original fiber length } BAi`{?z$<  
uN1VkmtDO  
N`4XlD  
; ------------- ].sD#~L_  
diagram 4:                                  ！输出图表4 0|g@;Pc  
db@^CS[P  
"TransverseProfiles" .hUlI3z9  
CR;E*I${  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) Ti7 @{7>  
9W,%[  
x: 0, 1.4 * r_co /um ) I(9qt>Y  
"radialposition (µm)", @x JJ'f\f9  
y: 0, 1.2 * I_max *cm^2 9|Ylv:sR  
"intensity (W/ cm&sup2;)", @y 5,-:31(j\  
y2: 0, 1.3 * N_Tm AMASh*  
frame #m;o)KkH$r  
hx CHq5KB98+  
hy [XubzZ9  
aX*9T8H/  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 .jiJgUa7  
  yscale = 2, f'*/IG  
  color = gray, w`fbUh6/  
  width = 3, Xk1uCVUe5  
  maxconnect = 1, ya[f?0b0  
  "N_dop (right scale)" k7
j[tB#  
l]j;0i  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 7SNdC8GZ~  
  color = red, UZ "!lpg  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 1OqVV?oz  
  width = 3, x-W~&`UU  
  "pump" u /DE  
j@Pd" Z9  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布  <4<y  
  color = blue, pvb&vtp  
  maxconnect = 1, 78 ]Kv^l^_  
  width = 3, ,In%r`{i  
  "signal" FnI}N;"  
8aKS=(Z!j  
sKJr34  
; ------------- &5XEjY>@  
diagram 5:                                  ！输出图表5 |=KzQY|u  
+@yU `  
"TransitionCross-sections" =F}qT|K  
iX<" \pV  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) qkz|r?R)  
)=`
DEbT  
x: 1450, 2050 b)M-q{  
"wavelength(nm)", @x m{$}u
@a  
y: 0, 0.6 %d*0"<v  
"cross-sections(1e-24 m&sup2;)", @y ~j(vGO3JB  
frame LI&E.(:  
hx D~Ef%!&  
hy `9gV8
u  
/xcXd+k]  
f: s12_Tm(x * nm) /1e-24,      ！Tm³⁺吸收截面与波长的关系 ,zr,>^v  
  color = red, ZJc{P5a1J  
  width = 3, iH@u3[w  
  "absorption" Km!ACA&s6  
f: s21_Tm(x * nm) /1e-24,  ！Tm³⁺发射截面与波长的关系 -iY-rzW  
  color = blue, "'@D\e}  
  width = 3, N
~fE&@-  
  "emission" .MRN)p  
%{pjC7j#  

感谢，视频上有点看不清楚