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

(* >^<qke  
Demo for program"RP Fiber Power": thulium-doped fiber laser, /&kZ)XOi  
pumped at 790 nm. Across-relaxation process allows for efficient Em4TEv  
population of theupper laser level. )x(
*T  
*)            ！（*  *）注释语句 X+&@$v1  
ld9zOq  
diagram shown: 1,2,3,4,5  ！指定输出图表 ShCAkaj_  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 5fVdtJk7  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 vja^O  
; 3:"Variation of the Fiber Length"！信号输出功率vs 光纤长度的变化，仿真最佳光纤长度 x!I7vs~~zW  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 :FxZdE  
; 5:"Transition Cross-sections"    ！不同波长的跃迁横截面，横坐标波长，纵坐标为横截面 B"+Ygvxb  
/eIwv31  
include"Units.inc"         ！读取“Units.inc”文件中内容 .@B\&U7  
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include"Tm-silicate.inc"    ！读取光谱数据 _
e`b^_  
_^SNI~  
; Basic fiberparameters:    ！定义基本光纤参数 {Ziq~{W_  
L_f := 4 { fiberlength }      ！光纤长度 .Ta$@sPh}  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 jRgv 8n
  
r_co := 6 um { coreradius }                ！纤芯半径 1 #EmZ{*  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 =q6yb@  
D.?KgOZ  
; Parameters of thechannels:                ！定义光信道 -Ep-v4}  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm t`F%$q  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 !3HMGzt  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W (5Cm+Sy  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um Yt|{l  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 j4G,Z4  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 >aa-i
x &  
Q^mJ_~  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm [dt1%DD`M  
w_s := 7 um                          ！信号光的半径 /]+t$K\cBq  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 hP9+|am%  
loss_s := 0                            ！信号光寄生损耗为0 :+[
q`  

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R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 u_:" u  
@8/-^Rh*  
; 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 )0UQy#r  
calc $9hOWti  
  begin Cu/w><h)  
    global allow all;                   ！声明全局变量 ,Hj=]e2?  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 3!*J;Y  
    add_ring(r_co, N_Tm); oq0G@  
    def_ionsystem();              ！光谱数据函数 kyY tL_SD  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 T_B$  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 $e<3z6  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 r--"JO%
2  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 U)c,ZxE  
    finish_fiber();                                   #]:nQ(  
  end; L0uN|?}  
t,=khZ  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 iLS'47  
show "Outputpowers:"                                   ！输出字符串Output powers： \W*ouH  
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） Jh }3AoD  
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） $=H\#e)]Ug  
BQw#PXp3  
V1"+4&R^T_  
; ------------- Ng;E]2"  
diagram 1:                   !输出图表1 }hl# e[$  
%} \@Wk~  
"Powers vs.Position"          ！图表名称 T.&^1qWWA  
4'_uN$${$  
x: 0, L_f                      ！命令x: 定义x坐标范围 srC'!I=s>8  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 eR5swy&  
y: 0, 15                      ！命令y: 定义y坐标范围 *=r,V  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 SJ+.i u/  
frame          ！frame改变坐标系的设置 2Uk$9s  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） BH%eu 7`t  
hx             ！平行于x方向网格 [nflQW6  
hy              ！平行于y方向网格 w"A'uFXLc  
k*lrE4
::a  
f: P(pump, x),    ！命令f: 定义函数图；P(pump, x)函数是计算x位置处的泵浦光功率 E#_}y}7JY  
  color = red,  ！图形颜色 4Jo:^JV  
  width = 3,   ！width线条宽度 qFvtqv2  
  "pump"       ！相应的文本字符串标签 "4L' 2w+  
f: P(signal_fw, x),  ！P(signal_fw ,x) 函数是计算x位置处的前向信号光功率 4$vya+mAk5  
  color = blue,     #PtV=Ee1  
  width = 3, 6AzH'HF  
  "fw signal" nc&V59*   
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 -*tP_=-Dg  
  color = blue, xt40hZ$  
  style = fdashed, <PJwBA%{  
  width = 3, RQ|!?\a=  
  "bw signal" V&NOp  
5v>(xl  
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 ##yi^;3Y  
  yscale = 2,            ！第二个y轴的缩放比例 Ku&0bXP  
  color = magenta, +h[$\_y  
  width = 3, #9p{Y}2#  
  style = fdashed, xB 4A"|  
  "n2 (%, right scale)" HiVF<tN  
0}HKmEM  
f: 100 * n(x, 3),          ！n(x ,3) 函数是计算x位置处激活粒子数在能级3上的占比 ggX'`bK  
  yscale = 2, L42C<  
  color = red, SAXjB;VH6  
  width = 3, rWSw1(sAA  
  style = fdashed, U2+CL)al^  
  "n3 (%, right scale)" W^al`lg+y  
<W\~A$  
b6oPnP_3P  
; ------------- N6yqA)z?;  
diagram 2:                    ！输出图表2 J;'?(xO3\  
`<+D<x)(3  
"Variation ofthe Pump Power" _.wLQL~y  
O/l|\n  
x: 0, 10 js7J#b7  
"pump inputpower (W)", @x lty`7(\  
y: 0, 10 ^K&&O{  
y2: 0, 100 ZK_IK)g  
frame 4z[Z3|_V  
hx g24)GjDi  
hy Fi(_A  
legpos 150, 150 Jp_{PR:&  
{"'W!WTb  
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 hRGK W  
  step = 5, <@5#  
  color = blue, WihOGdUS6  
  width = 3, *F~"4g  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 3vmLftZE}  
  finish set_P_in(pump, P_pump_in) %E~4Ur  
u[PO'6Kzd  
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 >y%$]0F1  
  yscale = 2, /gXli)  
  step = 5, o&gcFOM22  
  color = magenta, CI$F#j  
  width = 3, g:e|  
  "population of level 2 (%, rightscale)", ;STO!^9~  
  finish set_P_in(pump, P_pump_in) N;RZIg(x  
t`H^! b  
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 4$d|
}ajH  
  yscale = 2, &RpQ2*4n  
  step = 5, mMu3B2nke=  
  color = red, Xp
._B4g  
  width = 3, j08|zUe  
  "population of level 3 (%, rightscale)", )v8;\1`s:  
  finish set_P_in(pump, P_pump_in) p!U#53  
xg\M9&J  
k`2 K?9\  
; ------------- EmG`ga)s  
diagram 3:                         ！输出图表3 +;U}SR<  
7^as~5'&-  
"Variation ofthe Fiber Length" `=b*g24z[N  
IS]03_uQ  
x: 0.1, 5 4D9lZa}  
"fiber length(m)", @x :h*20iP  
y: 0, 10 1H-R-NNJ:  
"opticalpowers (W)", @y {Kd9}CDAZ  
frame htlsU*x  
hx BAg*zYV7  
hy @MAk/mb&  
@l>\vs<  
f: (set_L(x);P_out(signal_fw)),     ！改变光纤长度对信号光输出功率的影响 ]Fl+^aLS  
  step = 20,             G-bG}9vc]  
  color = blue, RAXqRP,iw  
  width = 3, mcS/-DaN?  
  "signal output" u|BD
%5+J  
m!N_TOl-^  
;f: (set_L(x);P_out(pump)),                     ！改变光纤长度对泵浦信号输出功率的影响 ./J.OU1  
   step = 20, color = red, width = 3,"residual pump" >sPu*8D40a  
.l !:|Fd  
! set_L(L_f) {restore the original fiber length } 5|S|HZ8G  
Q gDjc'  
burEo
.=  
; ------------- 1Qhx$If~  
diagram 4:                                  ！输出图表4 :]=Y1*L\)  
^X"G~#v=q  
"TransverseProfiles" 0ydAdgD  
zu^?9k  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) =n9adq  
HBo^8wN
 
x: 0, 1.4 * r_co /um '1=/G7g  
"radialposition (µm)", @x ` n@[=l~  
y: 0, 1.2 * I_max *cm^2 !ssE >bDa  
"intensity (W/ cm&sup2;)", @y >OZ+k(saL  
y2: 0, 1.3 * N_Tm ,^:Zf|V  
frame V4/P  
hx 7$,["cJX  
hy DtXXfp@;  
w v9s{I{P  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 h7[V
XE  
  yscale = 2, 1K09iB  
  color = gray, 1fViW^l_  
  width = 3, JWlH(-U4|  
  maxconnect = 1, >`'#4!}G5j  
  "N_dop (right scale)" iDp]lu  
pb_mW;JVu  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 ~k|~Q\  
  color = red, tvf"w`H  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 `:i|y  
  width = 3, 3vQ?vS|2  
  "pump" Crm](Z?  
57v[b-SK  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 p Ic;9  
  color = blue, :NA cad  
  maxconnect = 1, xf% ,UQ  
  width = 3, ,Xo9gn  
  "signal" _Dwn@{[(8  
Z9~~vf#  
*=~ 9?  
; ------------- <*2.B~  
diagram 5:                                  ！输出图表5 4-ZiKM  
T/)$}#w0i  
"TransitionCross-sections" ]bhzB  
w+2:eFi=/  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) wb"Jj  
&AUL]:<s  
x: 1450, 2050 $M$oNOT}Y  
"wavelength(nm)", @x f^:9gRt  
y: 0, 0.6 }Jjq]lW  
"cross-sections(1e-24 m&sup2;)", @y !COaPrg  
frame @DU]XKv  
hx X7NRQ3P@  
hy i.0}qS?  
kx]f`b  
f: s12_Tm(x * nm) /1e-24,      ！Tm³⁺吸收截面与波长的关系 oopTo51,a  
  color = red, Fm*n>^P@Y  
  width = 3, XH1so1h  
  "absorption" PKwHq<vAsB  
f: s21_Tm(x * nm) /1e-24,  ！Tm³⁺发射截面与波长的关系 d3 fE[/oU  
  color = blue, JQQD~J1)E  
  width = 3, :pDwgd  
  "emission" ~Jp\'P7*  
.F'Fk=N  

感谢，视频上有点看不清楚