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

(* -`'|z+V  
Demo for program"RP Fiber Power": thulium-doped fiber laser, 0~U0s3  
pumped at 790 nm. Across-relaxation process allows for efficient Ke4oLF2
 
population of theupper laser level. Xy(QK2|  
*)            ！（*  *）注释语句 OH@"]Nc~  
:lai0> D  
diagram shown: 1,2,3,4,5  ！指定输出图表 |*?N#0s5h  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 SNqSp.>-U"  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 Ubu&$4a  
; 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 [R4#bl  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置
C@Wzg  
; 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 v:SHaUS  
k^oSG1F  
include"Units.inc"         ！读取“Units.inc”文件中内容 i6paNHi*  
]-t)wGr  
include"Tm-silicate.inc"    ！读取光谱数据 k*A(7qQA`4  
r $S9/  
; Basic fiberparameters:    ！定义基本光纤参数 0'd@8]|H  
L_f := 4 { fiberlength }      ！光纤长度 ()6%1zCO  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 |&@q$d  
r_co := 6 um { coreradius }                ！纤芯半径 ZSNbf|ldiE  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 b=Nsz$[  
:Pq&l.  
; Parameters of thechannels:                ！定义光信道 DG;u_6;JR  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm f
tY&Q#[  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 D:9^^uVp  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W 4&NB xe  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um a >fA-@  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 KJFQ)#SW!  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 !po,Z&  
S+06p
j4Ie  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm wA{)
9.  
w_s := 7 um                          ！信号光的半径 I0Do%  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 Q3>qT84  
loss_s := 0                            ！信号光寄生损耗为0 "dCIg{j  
4AhFE@  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 rv[BL.qV  
>IQ&*Bb  
; Function for defining themodel:   ！定义模型函数，一定要有calc命令，否则函数只会被定义，但不会被执行 rX$-K\4W  
calc xd3mAf  
  begin GYw/KT~$  
    global allow all;                   ！声明全局变量 HV!P]82Pa  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 6No.2Oo  
    add_ring(r_co, N_Tm); ub 2'|CYw  
    def_ionsystem();              ！光谱数据函数 wSjy31  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 Rb<| <D+  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 Yy 4Was#  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 cY} jPDH  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 ;2h"YU-b  
    finish_fiber();                                   =pe O%  
  end; mV]~}7*Y;  
IO#)r[JZ  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 2^s&#@n3t  
show "Outputpowers:"                                   ！输出字符串Output powers： C|
}yE;*a  
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） e~QLzZ3  
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） toF6 Z  
-6 v?iiZr  
z*nztvY@e  
; ------------- Nj6Np^@sH  
diagram 1:                   !输出图表1 akw:3+`  
M/V"Ke"N  
"Powers vs.Position"          ！图表名称 .~'q yD2V  
CWs;1`aP  
x: 0, L_f                      ！命令x: 定义x坐标范围
e7G>'K  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 y3*IF2G  
y: 0, 15                      ！命令y: 定义y坐标范围 pnz@;+f  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 Ct/6<  
frame          ！frame改变坐标系的设置 @W+8z#xr'  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） Qvny$sr
2  
hx             ！平行于x方向网格 l$BKE{rg  
hy              ！平行于y方向网格 ~l+~MB  
rGH7S!\AM  
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 6:r1^q6A9L  
  color = red,  ！图形颜色 8Pom^QopK  
  width = 3,   ！width线条宽度 d{!zJ+n  
  "pump"       ！相应的文本字符串标签 IKp(KlA  
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 ziW[qH {  
  color = blue,     ?fs#K;w  
  width = 3, 'iYaA-9j  
  "fw signal" W6B o\UK  
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 r'}#usB(  
  color = blue, b(ryk./ogx  
  style = fdashed, k!@/|]3z  
  width = 3, RAyR&p  
  "bw signal" n O}x,sG2'  
zJ0'KHF}o  
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 '.&,.E&{$  
  yscale = 2,            ！第二个y轴的缩放比例 }=3W(1cu-  
  color = magenta, gvZLW!={  
  width = 3, D/{Spw@  
  style = fdashed, OQX ek@~2  
  "n2 (%, right scale)" WY~
}sE  
6a`_i  
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 FHH2  
  yscale = 2, $0iN43WSQ  
  color = red, sEfGf.  
  width = 3, ^_ZQf  
  style = fdashed, q14A'XW  
  "n3 (%, right scale)" EZiGi[t7  
.yj=*N.  
{&(bKQ  
; ------------- [dL?N  
diagram 2:                    ！输出图表2 e$(i!G)  
eEe8T=mD  
"Variation ofthe Pump Power" <Q-ufF85)  
J=]w$e ?.P  
x: 0, 10 cl7+DAE  
"pump inputpower (W)", @x /C8(cVNZ  
y: 0, 10 0\}j[-`pF  
y2: 0, 100 ~(0Y`+gC  
frame Iei4yDv ;  
hx l1_X5DI  
hy KF-gcRh  
legpos 150, 150 kAk,:a;P  
s9:2aLZ{  
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 Z*e7W O.  
  step = 5, E[Io8|QA  
  color = blue, 1aMBCh<}JN  
  width = 3, U ._1'pW  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 RBg
kC+2  
  finish set_P_in(pump, P_pump_in) 5BCaE)J  
$BBfsaJPT  
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 |)JoxqR  
  yscale = 2, @x J^JcE  
  step = 5, x}>tX
  
  color = magenta, n_ez6{  
  width = 3, ujWHO$uz!  
  "population of level 2 (%, rightscale)", /7"1\s0U  
  finish set_P_in(pump, P_pump_in) D3lYy>~d5;  
;q
k~>  
f: (set_P_in(pump,x); 100 * n_av(3)),   ！改变泵浦信号功率对能级3上激活粒子占比的影响 /+1Fa):  
  yscale = 2, 1k%ko?  
  step = 5, O}f(h5!k  
  color = red, {4m"S7O  
  width = 3, Zz&i0r  
  "population of level 3 (%, rightscale)", ]D-4
8o0  
  finish set_P_in(pump, P_pump_in) O}D
8  
CC-:dN
b  
=K>Z{%i  
; ------------- -5 W0K}  
diagram 3:                         ！输出图表3 x[^A9  
835Upj>  
"Variation ofthe Fiber Length" #f~a\}$I  
)?bb]hZg?O  
x: 0.1, 5 \
mu9ikZ<  
"fiber length(m)", @x d$,i?d,  
y: 0, 10 TxCQGzqe  
"opticalpowers (W)", @y "AK3t' jF*  
frame dGteYt
_F  
hx CzEn_ZMb  
hy O({_x@  
Wkk Nyg,  
f: (set_L(x);P_out(signal_fw)),     ！改变光纤长度对信号光输出功率的影响 @!'H'GvA  
  step = 20,             B
;~agr  
  color = blue, uW
Inx6p  
  width = 3, -d3y!|\>a  
  "signal output" @Kr)$F  
|\(/dXXP  
;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 ?^vZ{B)&0E  
   step = 20, color = red, width = 3,"residual pump" =5M>\vt]  
L K~,  
! set_L(L_f) {restore the original fiber length } ZtLn*M  
(*x"6)`  
^aW[~ c  
; ------------- {|E7N"Qzg  
diagram 4:                                  ！输出图表4 bC{8yV=)  
Z
n0fgQd  
"TransverseProfiles" VT7NWTJ,  
"\[>@_p h  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) F]*-i 55S  
%S#"pKE6R  
x: 0, 1.4 * r_co /um 7dJaWD:&   
"radialposition (µm)", @x *]6dV'  
y: 0, 1.2 * I_max *cm^2 4"{wga~%/  
"intensity (W/ cm&sup2;)", @y 6<Wr 8u,  
y2: 0, 1.3 * N_Tm $bosGG  
frame k>CtWV5B  
hx fNJ;{&#  
hy _64@zdL+  
j2Y(Q/i  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 $\!;*SSj  
  yscale = 2, q_&IZ,{Vk  
  color = gray, ,GnU]f  
  width = 3, \pGO}{3e*  
  maxconnect = 1, |pR$' HO  
  "N_dop (right scale)" $@kw>2  
\Agg6tYr  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 _[o^23Hj  
  color = red, .A/H+.H;  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 n5/Tn7hY  
  width = 3, QZox3LM1&.  
  "pump" `=DCX%Vw  
T_[\(K`w!  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 K>6k@okO  
  color = blue, Q$L(fHkw  
  maxconnect = 1, 30E v"  
  width = 3, Sg>0P*K@  
  "signal" 7~nCK  
vqi$}=%n?W  
MjC%6%HI  
; ------------- ^(*O$N*#  
diagram 5:                                  ！输出图表5 a[g|APZz  
ok2~B._+;  
"TransitionCross-sections" a3O_#l-Z  
ja- ~`  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) Au
ipK*&g  
c|( ?  
x: 1450, 2050 a BH1J]_  
"wavelength(nm)", @x (x0*(*A}  
y: 0, 0.6 b|o!&9Yyr  
"cross-sections(1e-24 m&sup2;)", @y E2H
<{Q   
frame {WeXURp&nF  
hx ]=VS~azZ5  
hy /&as)  
n o+tVm|  
f: s12_Tm(x * nm) /1e-24,      ！Tm<sup>3+</sup>吸收截面与波长的关系 0DVZRB  
  color = red, 3,L3C9V'  
  width = 3, .]s(c!{y  
  "absorption" 1 3`0d  
f: s21_Tm(x * nm) /1e-24,  ！Tm³⁺发射截面与波长的关系 S5u#g`I]  
  color = blue, {V%O4/  
  width = 3, )z235}P  
  "emission" 'F"Y?y:!  
uE#,c\[8  

感谢，视频上有点看不清楚