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

(* }5FdX3YR  
Demo for program"RP Fiber Power": thulium-doped fiber laser, h)fi9  
pumped at 790 nm. Across-relaxation process allows for efficient 5&\Q0SX(~  
population of theupper laser level. #:e52
=  
*)            ！（*  *）注释语句 D?;$:D"  
_6(QbY'JV`  
diagram shown: 1,2,3,4,5  ！指定输出图表 OcwD<Xy  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 PJsiT4<  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 TnCN2#BO  
; 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 ^LX1&yT@  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 D*I%=);B_  
; 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 N)WAzH  
FhHcS>]:.  
include"Units.inc"         ！读取“Units.inc”文件中内容
hj4Kv  
/T!S)FD\/v  
include"Tm-silicate.inc"    ！读取光谱数据 #B_ ``XV  
-P^ 6b(  
; Basic fiberparameters:    ！定义基本光纤参数 +K])&}Dw  
L_f := 4 { fiberlength }      ！光纤长度 U8PSJ0ny  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 8S"vRR  
r_co := 6 um { coreradius }                ！纤芯半径 2r^|  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 E?m(&O j  
wWQv]c%  
; Parameters of thechannels:                ！定义光信道 HE,# pj(D  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm %tT&/F  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 !Y8us"  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W PTXy:>]M  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um qe8dpI;  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 l}
A8  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 6Xu8~%i  
%XMwjBM  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm y+hC !-  
w_s := 7 um                          ！信号光的半径 <b~KR8  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 Es/\/vF7]D  
loss_s := 0                            ！信号光寄生损耗为0 J
Bo/<W#|  
mp:%k\cF|  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 ,W;\6"Iwx'  
>g
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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 Y9F!HM-`  
calc }SR}ET&z  
  begin V\^3I7F  
    global allow all;                   ！声明全局变量 eQbDs_  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 v}q3_m]   
    add_ring(r_co, N_Tm); `9}\kn-</8  
    def_ionsystem();              ！光谱数据函数 QqA~y$'ut  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 id="\12Bw  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 </3Shq  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 dlsVE~_G  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 Dm?>U1{   
    finish_fiber();                                   K+5S7wFDZ  
  end; =\GuIH2  
NHG+l)y:  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 uDJi2,|n  
show "Outputpowers:"                                   ！输出字符串Output powers： $@<qaR{t\  
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） }J"}5O2,b  
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） X YO09#>&  
cLj@+?/
 
Mn7nS:  
; ------------- UE^_SZ  
diagram 1:                   !输出图表1 !*_5 B'  
>bWx!M]
 
"Powers vs.Position"          ！图表名称 qPY OO  
+`O8cHx  
x: 0, L_f                      ！命令x: 定义x坐标范围 MQ>.^]B]o  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 l=G=J(G  
y: 0, 15                      ！命令y: 定义y坐标范围 KLK '_)|CT  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 ]y= ff6Q  
frame          ！frame改变坐标系的设置 PYX]ld.E  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） c|OIUc  
hx             ！平行于x方向网格 O*^=  
hy              ！平行于y方向网格 x;ym_UZ6e  
ij i<+oul  
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 (ds-p[`[m  
  color = red,  ！图形颜色 y1z<{'2x  
  width = 3,   ！width线条宽度 Z".mEF-b  
  "pump"       ！相应的文本字符串标签 s\A"B#9r  
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 b<o Uy  
  color = blue,     q{I,i(%m8  
  width = 3, pcwkO  
  "fw signal" *<?or"P  
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 4X,fb`  
  color = blue, ckFnQhW  
  style = fdashed, h$7rEs  
  width = 3, 
gRA}sF  
  "bw signal" yDh(4w-~gk  
#n&/yYl9(l  
f: 100 * n(x, 2),    ！n(x ,2) 函数是计算x位置处激活粒子数在能级2上的占比 _X5@%/Vz  
  yscale = 2,            ！第二个y轴的缩放比例 )2t!= ua  
  color = magenta, .zxP,]"l  
  width = 3, Cj^:8 ?%  
  style = fdashed, 3NRxf8  
  "n2 (%, right scale)" _):V7Zv  
3";Rw9  
f: 100 * n(x, 3),          ！n(x ,3) 函数是计算x位置处激活粒子数在能级3上的占比 Zo`Ku+RL2'  
  yscale = 2, Du@?j7&l=$  
  color = red, %%
J)@k^vH  
  width = 3, ? ->:,I=<~  
  style = fdashed, -+fbK/  
  "n3 (%, right scale)" h#a;(F4_7  
*{/ ww9fT  
M =Pn8<h~  
; ------------- |Y#KMi ~  
diagram 2:                    ！输出图表2 \z>Re$:  
v"'Co6fw  
"Variation ofthe Pump Power" #>~<rcE(  
? tre)  
x: 0, 10 -WiOs;2~/  
"pump inputpower (W)", @x #Hm*<s.  
y: 0, 10 6f1%5&si  
y2: 0, 100 h!# (.P  
frame O%RkU?ME  
hx U^jxKBq^  
hy Uawf,57v<  
legpos 150, 150 0uX"KL]Elf  
.KiJq:$H  
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 Q(@/,%EF  
  step = 5, 01v7_*'R  
  color = blue, n#@/A  
  width = 3, Da_8Q(XFe  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 !O=
?n<Ex"  
  finish set_P_in(pump, P_pump_in) _hP siZY9  
~x<nz/^  
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 jIY   
  yscale = 2, "-aak )7w  
  step = 5, v=!Ap ; 2L  
  color = magenta, :|hFpLt  
  width = 3, RiHOX&-7  
  "population of level 2 (%, rightscale)", 5Z2E))UU  
  finish set_P_in(pump, P_pump_in) Tj &PB_v1  
h{zE;!+)D  
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O"8B  
  yscale = 2, 5f+ziiZ  
  step = 5, ftBbO8e  
  color = red, Cj~45)
r  
  width = 3, \QF\Bh  
  "population of level 3 (%, rightscale)",  LW?Zd=  
  finish set_P_in(pump, P_pump_in) qyXx`'e  
>r Nff!Ow
 
diXb8L7B;  
; ------------- /8!s C D  
diagram 3:                         ！输出图表3 mHTZ:84  
=n $@  
"Variation ofthe Fiber Length" <^:e)W  
!]bXHT&!R  
x: 0.1, 5 .ZSGnbJ  
"fiber length(m)", @x )c9]}:W&  
y: 0, 10 JQVu&S  
"opticalpowers (W)", @y $`q8-+{  
frame xw60l&s.\L  
hx rE?(_LI  
hy (s?`*i:2  
Lo,z7"8  
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 gI^);JrTE  
  step = 20,             $V"NB`T  
  color = blue, StUiL>9T#  
  width = 3, gv=mz,z  
  "signal output" 7mulNq  
f'/@h Na3  
;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 DJl06-s V  
   step = 20, color = red, width = 3,"residual pump" a/@<KnT  
muLt/.EZ  
! set_L(L_f) {restore the original fiber length } .y7&!a35  
(]'Q!MjGa  
YJgw%UVJ5m  
; ------------- \=+s3p5N  
diagram 4:                                  ！输出图表4 `!MyOI`qS  
x}TDb0V  
"TransverseProfiles" lD09(|`  
oOk.
Fq  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) DbSl}N;  
gi`K^L=C  
x: 0, 1.4 * r_co /um <YbOO{  
"radialposition (µm)", @x # k+Ggw  
y: 0, 1.2 * I_max *cm^2 $[VeZ-  
"intensity (W/ cm&sup2;)", @y 7Dy\-9:v  
y2: 0, 1.3 * N_Tm +Ux)m4}j  
frame ]d"4G7mu`l  
hx RVN"lDGA  
hy m{={
a5GD  
?WWnt^  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 'e-Nt&;  
  yscale = 2, i|>
K  
  color = gray, "s$v?voo  
  width = 3, L K9vvQz  
  maxconnect = 1,
P,RCbPC4  
  "N_dop (right scale)" Egt;Bj#%  
GY4:9Lub7  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 GCrh4rxgg  
  color = red, bG+p
 
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 
'<f4POy!  
  width = 3, CAY^ `K!  
  "pump" ]sO})  
!@-j!Ub  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 Vn1kC  
  color = blue, k%QhF]  
  maxconnect = 1, 1?HUXN#,  
  width = 3, (c(c MC'  
  "signal" ZZTPAmIr  
+SM $#  
'DF3|A],  
; ------------- , j,[4^  
diagram 5:                                  ！输出图表5 \Ja%u"DA  
:c,\8n  
"TransitionCross-sections" H;,cUb  
 D@qq=M  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) GQ&9by=}  
mKZ?H$E%%  
x: 1450, 2050 n4)G g~PE  
"wavelength(nm)", @x yuswWc'  
y: 0, 0.6 8E/$nRfOd  
"cross-sections(1e-24 m&sup2;)", @y wpY%"x#-+=  
frame N##T1 Qm)  
hx 7&NRE"?G  
hy z>k6T4(  
@Th.=  
f: s12_Tm(x * nm) /1e-24,      ！Tm<sup>3+</sup>吸收截面与波长的关系 U*/  
  color = red, =,-80WNsX  
  width = 3, [?W3XUJ,Y  
  "absorption" m&,
d8Gss^  
f: s21_Tm(x * nm) /1e-24,  ！Tm<sup>3+</sup>发射截面与波长的关系 /'E+(Y&:J  
  color = blue, e}/c`7M  
  width = 3, BmUEo$w  
  "emission" ]V]~I.  
M O* m@  

感谢，视频上有点看不清楚