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

(* 8n&Gn%DvX  
Demo for program"RP Fiber Power": thulium-doped fiber laser, H|\@[:A+  
pumped at 790 nm. Across-relaxation process allows for efficient lwSZpS  
population of theupper laser level. *VX"_C0Jy=  
*)            ！（*  *）注释语句 N4HIQ\p  
Wg5<@=x!G  
diagram shown: 1,2,3,4,5  ！指定输出图表 ']bw37_U,  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 kuq&8f~!  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 Q6 oM$qiM  
; 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 ohJo1}{  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 zH5
pe  
; 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 :~^_*:  
@k-C>h()C  
include"Units.inc"         ！读取“Units.inc”文件中内容 +,Ud 3iS  
9}|x N8  
include"Tm-silicate.inc"    ！读取光谱数据 WEaG/)y  
w!%"b03q  
; Basic fiberparameters:    ！定义基本光纤参数 PQd*)6K:A  
L_f := 4 { fiberlength }      ！光纤长度 Qx")D?u  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 +dG3/vV  
r_co := 6 um { coreradius }                ！纤芯半径 T?g%I  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 @fQvAok  
`VrQ?s  
; Parameters of thechannels:                ！定义光信道 Zxw cqN  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm i7XM7+}  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 fsjCu!  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W 5i@
WBa  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um %y
{'p:  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 b!<\#[ A4  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 Z35(f0b  
\1He9~6  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm nYnBWDnV  
w_s := 7 um                          ！信号光的半径 >Jk]=_%  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 /:;"rnvq  
loss_s := 0                            ！信号光寄生损耗为0 _. &N@k  
)61X,z  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 @tIY%;Bgk  
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; 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 L,O.XR  
calc /UqIkc  
  begin I=pFGU  
    global allow all;                   ！声明全局变量 O?`_RN4l  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 qKD Nw8>  
    add_ring(r_co, N_Tm); |jB/d@RE  
    def_ionsystem();              ！光谱数据函数 ES)@iM?5  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 5{xK&[wR*  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 5m yQBK
E  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 y 2C Jk~  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 h e[2,  
    finish_fiber();                                   7O-fc1OTv  
  end; z5J$".O`  
n52Q-6H  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 G ?Hx"3:?  
show "Outputpowers:"                                   ！输出字符串Output powers： I}+9@d  
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） r4M;]  
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） /PKu",Azj  
0!b9%I=j  
/5Sd?pW;  
; ------------- !'#GdRstv  
diagram 1:                   !输出图表1 +i~kqiy.  
IuY4R0Go  
"Powers vs.Position"          ！图表名称 |s,y/svp  
W2&(:C8V@  
x: 0, L_f                      ！命令x: 定义x坐标范围 u`;P^t5  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 DB+oCE<.#  
y: 0, 15                      ！命令y: 定义y坐标范围 l<;~sag  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 q?qH7={,eu  
frame          ！frame改变坐标系的设置 "QvTn=  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） ffMk.Sq
I  
hx             ！平行于x方向网格 P  Ij  
hy              ！平行于y方向网格 uD?Rs`  
F1t+D)KA>  
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 ,h9?o  
  color = red,  ！图形颜色 DP-0,Gt&Xj  
  width = 3,   ！width线条宽度 z%1& t4$  
  "pump"       ！相应的文本字符串标签 4t-l@zFWb  
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 KE6XNG3  
  color = blue,     M0T z('~s  
  width = 3, {rwT
4]4  
  "fw signal" Qff.QI,  
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 &xpvHKJl  
  color = blue, (((|vI3 <  
  style = fdashed, 4y.qtiIP>$  
  width = 3, S0tkqA4  
  "bw signal" uu.}<VM.1  
Q_Wg4n5  
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 1ASoH,D/  
  yscale = 2,            ！第二个y轴的缩放比例 [C\B2iU7_M  
  color = magenta, [FZq'E"87  
  width = 3, 4hxa|f  
  style = fdashed, ^H -a@QM  
  "n2 (%, right scale)" phQ{<wzwp  
+4Fw13ADE  
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 EywBT  
  yscale = 2, J0imWluhQ  
  color = red, >?#zPweA  
  width = 3, K)  Ums-b  
  style = fdashed, /|lAxAm?  
  "n3 (%, right scale)" ^X?uAX-RP|  
xS:n  
gWL`J=DiU  
; ------------- !zsrORF{  
diagram 2:                    ！输出图表2 FB:nkUR`  
<xe_t=N  
"Variation ofthe Pump Power" =\
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x: 0, 10 |MOz>1<a  
"pump inputpower (W)", @x ~ToU._  
y: 0, 10 ^^lx Ot  
y2: 0, 100 nEPTTp+B  
frame G8 q<)  
hx e0#t  
hy K9]zUe&#w  
legpos 150, 150
hzU(XW  
^KnK \  
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 d"n"A?nXh  
  step = 5, ef)zf+o  
  color = blue, IT)3Et@Y  
  width = 3, !!ma]pB,  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 I~6 o<HO  
  finish set_P_in(pump, P_pump_in) !{{gL=_@  
6`vW4]zu  
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 X# /c7w-  
  yscale = 2, mYj)![  
  step = 5, T--%UZD]W  
  color = magenta, \*Yr&Lm  
  width = 3, Pjn{3/*wi  
  "population of level 2 (%, rightscale)", nt+OaXe5D  
  finish set_P_in(pump, P_pump_in) ^ g|VZN  
z{FFTb^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 >x3lA0m  
  yscale = 2, $PI9vyS  
  step = 5, 1D38T  
  color = red, [qC0YM  
  width = 3, ,tcUJ}l  
  "population of level 3 (%, rightscale)", Yufjy=!  
  finish set_P_in(pump, P_pump_in) 'n ^,lXWB  
"<{|ni}  
rmo\UCD  
; ------------- I{r*Y9  
diagram 3:                         ！输出图表3 (Li0*wRb  
fm`
V2'Rm  
"Variation ofthe Fiber Length" qTN%9!0@9  
9X%: ){  
x: 0.1, 5 :enR8MS  
"fiber length(m)", @x .}v" `>x  
y: 0, 10 ? dHl'  
"opticalpowers (W)", @y 7Xu#|k  
frame ]@b9m  
hx EFl
jUT?&  
hy beC%Tnb7  
%Zbm%YaW5  
f: (set_L(x);P_out(signal_fw)),     ！改变光纤长度对信号光输出功率的影响 -*MY7t3  
  step = 20,             Rw%?@X3m]  
  color = blue, V=dOeuYd  
  width = 3, xY#J((-iH  
  "signal output" >*VvV/UU  
pjX=:K|  
;f: (set_L(x);P_out(pump)),                     ！改变光纤长度对泵浦信号输出功率的影响 xVbRCu#Z  
   step = 20, color = red, width = 3,"residual pump" G_J}^B*?%v  
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! set_L(L_f) {restore the original fiber length } 5lJL[{  
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Um6}h@>  
; ------------- 'QxJU$  
diagram 4:                                  ！输出图表4 GCq4{_B\Q  
X-_VuM_p  
"TransverseProfiles" VQ|{Q}  
pCrm `hy(  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) *jbPy?%oY  
:;yrYAyT3  
x: 0, 1.4 * r_co /um .pQ5lK(R  
"radialposition (µm)", @x !cYID \}S,  
y: 0, 1.2 * I_max *cm^2 rU&Y/  
"intensity (W/ cm&sup2;)", @y _1qR1<V  
y2: 0, 1.3 * N_Tm -` ViuDX=  
frame 8K
?}!$fz  
hx ;'8Wl  
hy 5;HGS{`  
$b1>,d'oz  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 DE?k|Get2  
  yscale = 2, GT6i9*tb#  
  color = gray, (C#0 ML  
  width = 3,  IPK1g3Z  
  maxconnect = 1, ?L7DVwVa,I  
  "N_dop (right scale)" (0b\%;}  
-43>?m/a  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 CvE^t#Bok  
  color = red, >Ti%Th,  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 7T
dx*1 U  
  width = 3, yzp#  
  "pump" &RARK8^  
8IRKCuV  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 X"+p=PGZK  
  color = blue, qz]qG=wmL  
  maxconnect = 1, U\H[.qY-  
  width = 3, P@ew' JL%  
  "signal"  ^AaE$G&:  
5~?6]=hl  
,o%by5j"^N  
; ------------- &d2L9kTk  
diagram 5:                                  ！输出图表5 CU\gx*=E  
1b3k|s4   
"TransitionCross-sections" 7uL.=th'  
'Xj^cX  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) LX7P?j  
$&Vba@v  
x: 1450, 2050 <i</pA  
"wavelength(nm)", @x %K|f,w=m  
y: 0, 0.6 k+-?b(z)$  
"cross-sections(1e-24 m&sup2;)", @y M-i3_H)  
frame ajk}&`Wj"  
hx AZc=Bbh  
hy *cXq=/s  
XdCP!iq*8  
f: s12_Tm(x * nm) /1e-24,      ！Tm³⁺吸收截面与波长的关系 X/2GTU7?  
  color = red, 5["3[h  
  width = 3, 2A~o)7JaZ  
  "absorption" r/'!#7dLG-  
f: s21_Tm(x * nm) /1e-24,  ！Tm³⁺发射截面与波长的关系 }i"[5:  
  color = blue, gR# k'  
  width = 3, 4x[_lsj  
  "emission" /7#e  
z+Fu{<#(  

感谢，视频上有点看不清楚