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

(* uVIs5IZzIi  
Demo for program"RP Fiber Power": thulium-doped fiber laser, +D$\^ <#  
pumped at 790 nm. Across-relaxation process allows for efficient lq+FH&  
population of theupper laser level. X}g!
Lp  
*)            ！（*  *）注释语句 1<Z
vHv  
;|}6\=(  
diagram shown: 1,2,3,4,5  ！指定输出图表 x|E$ f+  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 !^B`7  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 2NI3&;{4  
; 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 =>/aM7]  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 `2Ff2D^ ?  
; 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 aBol9`6  
lvk(q\-f  
include"Units.inc"         ！读取“Units.inc”文件中内容 (x#4BI}L9)  
EPdR-dC^wE  
include"Tm-silicate.inc"    ！读取光谱数据 KxK$Y.y]  
qnruatA  
; Basic fiberparameters:    ！定义基本光纤参数 mu|#(u  
L_f := 4 { fiberlength }      ！光纤长度 O`~T:N|D  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 iK'bV<V&7  
r_co := 6 um { coreradius }                ！纤芯半径 Exk[;lI  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 "-(yZigQ  
;o"}7'4*R%  
; Parameters of thechannels:                ！定义光信道 ^!N_Nx/M  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm [C/h{WPC-  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 uppA`>  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W VA.:'yQtJ  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um R:Z{,R+  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 7BdvJ"  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 ysDfp'
C,  
M}3>5*!=  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm -=O9D-x=  
w_s := 7 um                          ！信号光的半径 4vGkgH<,  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 )O2giVq7[0  
loss_s := 0                            ！信号光寄生损耗为0
d;V  
cm]8m_!  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 P+,\x&Vr  
Y7]N.G3,]  
; Function for defining themodel:   ！定义模型函数，一定要有calc命令，否则函数只会被定义，但不会被执行 j`ggg]"&$  
calc W UDQb5k  
  begin ki=-0G*]  
    global allow all;                   ！声明全局变量 r
9z/hm}E  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 IHMZE42  
    add_ring(r_co, N_Tm); doVBVTk^  
    def_ionsystem();              ！光谱数据函数 4Poi:0oOys  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 4E&URl0Bh  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 \oLRNr[F  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 N>'1<i?  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 95[yGO>ZYz  
    finish_fiber();                                   _~| j~QE]  
  end; TZ?va@2  
F=$2Gz 'RT  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 uXNJ
{]o  
show "Outputpowers:"                                   ！输出字符串Output powers： n3jA[p:  
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） f-tjMa /_  
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） fA2H8"r  
{&,a)h7&  
_:?)2NV  
; ------------- &tkkn2t  
diagram 1:                   !输出图表1 r,!7TuBl  
=>n:\_*M  
"Powers vs.Position"          ！图表名称 9)3ok#pQ/  
G!L=W#{  
x: 0, L_f                      ！命令x: 定义x坐标范围 DNq=|?qn]  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 /{\tkvv-Z  
y: 0, 15                      ！命令y: 定义y坐标范围 srw5&s(3X  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 7Ha +@  
frame          ！frame改变坐标系的设置 t8E'd:pE  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） `.>2h}op  
hx             ！平行于x方向网格 e(O"V3wq*6  
hy              ！平行于y方向网格
'9H7I! L@  
m .l
e' &  
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 .3 m^yo c/  
  color = red,  ！图形颜色 @;"HslU\Q  
  width = 3,   ！width线条宽度 $ThkK3  
  "pump"       ！相应的文本字符串标签 GGo n
A  
f: P(signal_fw, x),  ！P(signal_fw ,x) 函数是计算x位置处的前向信号光功率 =Bu d!  
  color = blue,     o{(-jhR  
  width = 3, c{ +Y$  
  "fw signal" (S&X??jfB5  
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 ~^UQw?;  
  color = blue, ?r"m*fY
%  
  style = fdashed, "AS;\-Jk  
  width = 3, ]Z&2  
  "bw signal" &JVe-.  
APsd^J  
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 s,\!@[N  
  yscale = 2,            ！第二个y轴的缩放比例 dUk^DI,:l  
  color = magenta, aqK<}jy  
  width = 3, l[fU0;A  
  style = fdashed, lGwX.cA!'  
  "n2 (%, right scale)" -^Baxkq(YM  
LZqx6~]O  
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 >t.2!Z_RQ  
  yscale = 2, o6P)IZ1  
  color = red, Q4
JwX=ZVj  
  width = 3, Ia*eb%HG  
  style = fdashed, vq B)PL5)  
  "n3 (%, right scale)" T+8F'9i`  
T
_lexX[\  
XsQ?&xK=u  
; ------------- Ji\8(7 {8  
diagram 2:                    ！输出图表2 ?{mFQ
  
3l0x~  
"Variation ofthe Pump Power" 8sOM%y9M  
nzmv>s&UW  
x: 0, 10 CL5u{i5  
"pump inputpower (W)", @x >j{phZ  
y: 0, 10 ~Y<x-)R  
y2: 0, 100 Q+*o-  
frame 9He>F7J:p'  
hx ~9#\+[ d_  
hy hs}nI/#  
legpos 150, 150 Ev|2bk \  
;,}tXz  
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 E)|fKds  
  step = 5, _fz-fG 1  
  color = blue, c!AGKc  
  width = 3, US 9cuah1/  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 *IJctYJaX  
  finish set_P_in(pump, P_pump_in) NYz{[LM  
rLGh>bw#`3  
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 x3xBl_t  
  yscale = 2, 5 5>^H1M  
  step = 5, Lj6$?(x}  
  color = magenta, DJr{;t$7~  
  width = 3, `So*\#\T  
  "population of level 2 (%, rightscale)", i=#<0!m  
  finish set_P_in(pump, P_pump_in) /PN[g~3  
T.HS.
 
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 
}bz v&k  
  yscale = 2, #lRkp.e  
  step = 5, W6_/FkO  
  color = red, R@-rc|FunJ  
  width = 3, OWT5Bjl  
  "population of level 3 (%, rightscale)", zpx  
  finish set_P_in(pump, P_pump_in) 1Rc'2Y  
%Ak"d+OH4  
r'wam]1Z  
; ------------- N'w;1,c+  
diagram 3:                         ！输出图表3 Z6\OkD  
# kl?ww U  
"Variation ofthe Fiber Length" }A;J-7g6  
h lD0^8S  
x: 0.1, 5 E#X(0(A)  
"fiber length(m)", @x v@TP_Ka  
y: 0, 10 6cQh8_/>{#  
"opticalpowers (W)", @y 6|+I~zJ88  
frame p@!{Sh  
hx 9IZ}}x  
hy /MKcS%/H/  
avrf]raM|  
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 QL%&b\K  
  step = 20,             _"%mLH=!8  
  color = blue, '+LC.lM  
  width = 3, m~mw1r  
  "signal output" 9E~=/Q=  
FWcE\;%yVg  
;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 42kr&UY&  
   step = 20, color = red, width = 3,"residual pump" q'9u8b  
:t+XW`eQR:  
! set_L(L_f) {restore the original fiber length } tP8>0\$)  
`2Rd=M]?  
=S7Xj`/  
; ------------- 9;KQ3.Fa}q  
diagram 4:                                  ！输出图表4 E-\Wo3  
^u`1W^>  
"TransverseProfiles" *o <S{  
.6z8fjttOC  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) b:VCr^vp  
N# $ob9  
x: 0, 1.4 * r_co /um X<{kf-GP  
"radialposition (µm)", @x wxU@M1w}  
y: 0, 1.2 * I_max *cm^2 +Z99x#  
"intensity (W/ cm&sup2;)", @y #InuN8sI  
y2: 0, 1.3 * N_Tm ] }XsP  
frame f*U3s N^y  
hx ]/&qv6D*d  
hy ~Ry?}5&:  
Hz39
v44  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 OOJg%y*H  
  yscale = 2, y}Ji( q~  
  color = gray, 8>Az<EF^=#  
  width = 3, "@uKe8r|y  
  maxconnect = 1, foO/Yc  
  "N_dop (right scale)" c&4EO|  
}EM
vEA  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 EY'kIVk  
  color = red, ;>YLL}]j  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 ,`kag~bZ  
  width = 3, !0i6:2nw  
  "pump" W>$2BsO  
g{0a]'ph  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 mN+ w,  
  color = blue, Y~vyCU5nWR  
  maxconnect = 1, ?}p~8{ '  
  width = 3, x -CTMKX  
  "signal" tgk] sQY  
zM:&`6;e  
,i0Dw"/u  
; ------------- ~^Ceru"<  
diagram 5:                                  ！输出图表5 ^\o3V<  
cP8g.+  
"TransitionCross-sections" APye  
[\|`C4@3a  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) $#2zxpr,  
*nZe|)m  
x: 1450, 2050 ol^uM .k%_  
"wavelength(nm)", @x B<^yT@Wc  
y: 0, 0.6 Jkf%k3H3I*  
"cross-sections(1e-24 m&sup2;)", @y \0bao<  
frame \.!+'2!m  
hx :'hc&wk`  
hy ~1xfE C/  
gl.uDO%.  
f: s12_Tm(x * nm) /1e-24,      ！Tm³⁺吸收截面与波长的关系  8kn> ?  
  color = red, )67pBj  
  width = 3,
barY13)$U  
  "absorption" LsW7JIQd  
f: s21_Tm(x * nm) /1e-24,  ！Tm³⁺发射截面与波长的关系 lk/T|0])  
  color = blue, ;iB9\p$
K)  
  width = 3, [Q0n-b,Q  
  "emission" S1d^mu  
,#/%Fn%T  

感谢，视频上有点看不清楚