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

(* dR/UXzrc  
Demo for program"RP Fiber Power": thulium-doped fiber laser, H+2J.&Ch  
pumped at 790 nm. Across-relaxation process allows for efficient [dL?N  
population of theupper laser level. =09j1:''<d  
*)            ！（*  *）注释语句 s?K4::@Fv  
El&pux2  
diagram shown: 1,2,3,4,5  ！指定输出图表 S+OI?QS  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 cl7+DAE  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 /C8(cVNZ  
; 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 !r!Mq~X<=  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 I0jEhg%JZ  
; 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 `TsfscN  
Q+ST8  
include"Units.inc"         ！读取“Units.inc”文件中内容 dl$l5z\  
R QO{fC  
include"Tm-silicate.inc"    ！读取光谱数据 f&cG;Y  
t@19a6:Co  
; Basic fiberparameters:    ！定义基本光纤参数 %J%gXk}]  
L_f := 4 { fiberlength }      ！光纤长度 |QgXSe7  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 s*#|EdD6@  
r_co := 6 um { coreradius }                ！纤芯半径 izWl5}+'B  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 @%cJjZ5y  
qP<,"9!I  
; Parameters of thechannels:                ！定义光信道 /~tfP  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm FZ2-e  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 n_ez6{  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W ujWHO$uz!  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um IKr7"`  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 D3lYy>~d5;  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 hA\8&pI;  
$xZk{ rK  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm n0i&P
9@B1  
w_s := 7 um                          ！信号光的半径 K+$c,1wb  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 h5l Lb+  
loss_s := 0                            ！信号光寄生损耗为0 +@qk=]3a  
A0X0t  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 < 5_Ys  
M2EN(Y_k0  
; 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 `U1%d7[vY  
calc f8^58]wx0  
  begin (Mm{"J3uv  
    global allow all;                   ！声明全局变量 ry]7$MQyV  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 p+7BsW.l  
    add_ring(r_co, N_Tm); EH "g`r  
    def_ionsystem();              ！光谱数据函数 xA5$!Oq7  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 EXFxiw  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 E6@;e-]j  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 `U3  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 @YB\PVhW  
    finish_fiber();                                   9c7}-Go  
  end; +r!h*4  
l>(G3lIw  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出
"qm>z@K  
show "Outputpowers:"                                   ！输出字符串Output powers： !Cy2>6v7  
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） .nH /=  
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） @Kr)$F  
%UJ4wm  
f,a %@WT  
; ------------- dJ^`9W  
diagram 1:                   !输出图表1 ?mAw"Rb!  
?.4l1X6Ba  
"Powers vs.Position"          ！图表名称 <"+C<[n.  
JAz;_wS(k  
x: 0, L_f                      ！命令x: 定义x坐标范围 Fb'wC  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 /nP=E  
y: 0, 15                      ！命令y: 定义y坐标范围 NFc8"7Mz}  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 ,s76]$%4  
frame          ！frame改变坐标系的设置 F]*-i 55S  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） %S#"pKE6R  
hx             ！平行于x方向网格 cj#q7  
hy              ！平行于y方向网格 !v L:P2  
\IfgL$+  
f: P(pump, x),    ！命令f: 定义函数图；P(pump, x)函数是计算x位置处的泵浦光功率 :GYv9OG  
  color = red,  ！图形颜色 urB3  
  width = 3,   ！width线条宽度 ~\G3l,4  
  "pump"       ！相应的文本字符串标签 P.B'Gh#^  
f: P(signal_fw, x),  ！P(signal_fw ,x) 函数是计算x位置处的前向信号光功率 /,UkT*+>!  
  color = blue,     3T/j5m}+!  
  width = 3, 2AW{qwk7  
  "fw signal" WCu%@hh=h  
f: P(signal_bw, x),   ！P(signal_bw ,x) 函数是计算x位置处的后向信号光功率 z0[ZO1Fo(  
  color = blue, uCfp+  
  style = fdashed, []0~9,u  
  width = 3, [ d7]&i}*|  
  "bw signal" 6w;|-/:`  
" G6jUTt  
f: 100 * n(x, 2),    ！n(x ,2) 函数是计算x位置处激活粒子数在能级2上的占比 %Ab_PAw  
  yscale = 2,            ！第二个y轴的缩放比例 >pvg0Fh  
  color = magenta, }z+"3A|  
  width = 3, pd3&AsU  
  style = fdashed, n^02@Aw  
  "n2 (%, right scale)" p&mtKLv  
3rg^R"&  
f: 100 * n(x, 3),          ！n(x ,3) 函数是计算x位置处激活粒子数在能级3上的占比 [Mc5N  
  yscale = 2, a?~csP^?}  
  color = red, c.Z4f
7  
  width = 3, mm-UQ\h  
  style = fdashed, 3&fFIab9  
  "n3 (%, right scale)" )6 <byO  
4"x;XVNM[  
WUS9zK  
; ------------- _l=  
diagram 2:                    ！输出图表2 qjzW9yV+  
D])YP0|}  
"Variation ofthe Pump Power" gdE`UZ\  
So.P @CCd  
x: 0, 10 GPLt<K!<#  
"pump inputpower (W)", @x Z[S+L"0  
y: 0, 10 TeCpT2!5j  
y2: 0, 100 E2H
<{Q   
frame *;E+9^:V  
hx `lezJ(Xm  
hy .r5oN+?e  
legpos 150, 150 >TnQ4^;v.  
'#PqI)P  
f: (set_P_in(pump, x);P_out(signal_fw)), ！set_P_in(pump,x)改变泵浦信道功率；P_out(signal_fw)输出前向信号光 :;;WK~*#  
  step = 5, 2U
`W[  
  color = blue, 2RUR=%C  
  width = 3, yUmsE-W  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 /NX7Vev  
  finish set_P_in(pump, P_pump_in) Ca@=s  
8{SU?MHQLE  
f: (set_P_in(pump,x); 100 * n_av(2)),   ！改变泵浦信号功率对能级2上激活粒子占比的影响 g+ 1=5g  
  yscale = 2, TTZxkK  
  step = 5, k+#l;<\2  
  color = magenta, ]Bd3d%  
  width = 3, N^(lUba  
  "population of level 2 (%, rightscale)",  L|lmStwe  
  finish set_P_in(pump, P_pump_in) 6mpg&'>  
N46$EsO!h  
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 :@%-f:iDj  
  yscale = 2, K}E7|gdG  
  step = 5, 795Jwv
  
  color = red, ,o@~OTja*  
  width = 3, u@_!mjXQ  
  "population of level 3 (%, rightscale)", 5Sjr6l3Vq8  
  finish set_P_in(pump, P_pump_in) ;s\;78`0  
TF0-?vBWh  
Ryba[Fz4Di  
; -------------  ;[KriW  
diagram 3:                         ！输出图表3 [}ZPg3Y  
.d~]e2x  
"Variation ofthe Fiber Length" rH&r6Xv[  
K+@eH#Cv,(  
x: 0.1, 5  Ep\  
"fiber length(m)", @x EhIV(q9x  
y: 0, 10 A?IZ( Zx(`  
"opticalpowers (W)", @y me:|!lI7YU  
frame {#1j"  
hx 7}'A)C>J;  
hy x #tu  
!q$&JZY  
f: (set_L(x);P_out(signal_fw)),     ！改变光纤长度对信号光输出功率的影响 {nQ)4.e6  
  step = 20,             MO~~=]Y'  
  color = blue, 12tJr
S*Z  
  width = 3, ewAH'H]o  
  "signal output" {;iHYr-zs  
:qAc= IC%  
;f: (set_L(x);P_out(pump)),                     ！改变光纤长度对泵浦信号输出功率的影响 XnE %$NJ  
   step = 20, color = red, width = 3,"residual pump" UROj9COv  
wAu[pWD'6;  
! set_L(L_f) {restore the original fiber length } cNuHXaWp  
EO].qN-8  
S"P9Nf?9  
; ------------- S?
Bc~y  
diagram 4:                                  ！输出图表4 %R5Com  
dgco*TIGO  
"TransverseProfiles" pG!(6V-x<E  
&gA6+b'  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) .lvI8Jf~X  
 vr{'FMc  
x: 0, 1.4 * r_co /um N4a`8dS|  
"radialposition (µm)", @x B0)`wsb_  
y: 0, 1.2 * I_max *cm^2 [arTx^  
"intensity (W/ cm&sup2;)", @y BEXQTM3])I  
y2: 0, 1.3 * N_Tm F<yy>Wf  
frame VelB-vy&  
hx Bn~\HW\Lh  
hy .Na&I)udX.  
0~+NB-L}  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 1m>^{u  
  yscale = 2, W&+y(Z-t  
  color = gray, <H5n>3#pH  
  width = 3, g>~cs_N@  
  maxconnect = 1, k-WHHoU>o  
  "N_dop (right scale)" mW~i c  
N
qJ<!q)  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 X~v4
"|a  
  color = red, i1qS ns  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 lo+xo;Nd  
  width = 3, ~@T+mHny  
  "pump" y$IaXr5L  
m<FF$pTT  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 E tJ~dL)  
  color = blue, M!N` Orz  
  maxconnect = 1, N@Xg5huO  
  width = 3, 81g9ZV(4  
  "signal" N9i}p^F<_  
#_.g2 Y  
 d?:`n9`  
; ------------- |x &Z~y  
diagram 5:                                  ！输出图表5 V~OUE]]Q  
0jR){G9+  
"TransitionCross-sections" sA/,+aM  
~TYbP  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) =m`l%V[  
uuu\f*<  
x: 1450, 2050 f5@.^hi[  
"wavelength(nm)", @x ;"1/#CY773  
y: 0, 0.6 zzX<?6MS  
"cross-sections(1e-24 m&sup2;)", @y KHvIN}V5?3  
frame /@&(P#h  
hx xN6?yr  
hy R=`U4Ml;  
3PfiQ|/b  
f: s12_Tm(x * nm) /1e-24,      ！Tm³⁺吸收截面与波长的关系 "E.\6sC  
  color = red, }dy9IH  
  width = 3, ~6p5H}'H1  
  "absorption" D899gGe  
f: s21_Tm(x * nm) /1e-24,  ！Tm³⁺发射截面与波长的关系 j7f5|^/x3  
  color = blue, $zdd=.!KiK  
  width = 3, vx'l>@]k  
  "emission" XmP;L(wa  
>f>V5L%1  

感谢，视频上有点看不清楚