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小火龙果 2020-05-28 16:28

RP Fiber Power仿真设计掺铥光纤激光器代码详解

(* $B6CLWB  
Demo for program"RP Fiber Power": thulium-doped fiber laser, Fl{:aq"3  
pumped at 790 nm. Across-relaxation process allows for efficient zs#s"e:jeR  
population of theupper laser level. U^jxKBq^  
*)            ！（*  *）注释语句 90JD`Nz  
(bEX"U-  
diagram shown: 1,2,3,4,5  ！指定输出图表 5)X;q-  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 ];BGJ5^j  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 S;a'@5  
; 3:"Variation of the Fiber Length"！信号输出功率vs 光纤长度的变化，仿真最佳光纤长度 C'8v\C9Ag  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 @j +8M  
; 5:"Transition Cross-sections"    ！不同波长的跃迁横截面，横坐标波长，纵坐标为横截面 {z)&=v@  
p<>x qU  
include"Units.inc"         ！读取“Units.inc”文件中内容 l|#WQXs*c{  
8\,|T2w,X  
include"Tm-silicate.inc"    ！读取光谱数据 !<9sOvka{  
w`Q"mx*  
; Basic fiberparameters:    ！定义基本光纤参数 CNwYQe-i  
L_f := 4 { fiberlength }      ！光纤长度 x1:#rb'  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 q-c9YOz_  
r_co := 6 um { coreradius }                ！纤芯半径 aq-`Bar  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 jG($:>3a@  
@**@W[EM  
; Parameters of thechannels:                ！定义光信道 fQ>=\*b9x^  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm Nxk3uF^  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 hw[jVx  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W 3w&fN3 1  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um $Pa7B]A,Ae  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 I5RV:e5b  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 u`E24~  
$*)??uU  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm ^/;W;C{4  
w_s := 7 um                          ！信号光的半径 cd8ZZ 8L  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 P'o:Vhm_H  
loss_s := 0                            ！信号光寄生损耗为0 cSdkhRAn  
oK3uGPi  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 bu`8QQ"C  
En@] xvE  
; 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 rEI]{?eoF  
calc Z2z"K<Z W  
  begin $'$#Xn,hU  
    global allow all;                   ！声明全局变量 jO'+r'2B9  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 eF8!}|*N  
    add_ring(r_co, N_Tm); k< b`v&G  
    def_ionsystem();              ！光谱数据函数 F\m  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 **\BP,]}  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 xw60l&s.\L  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 ?VM#Nf\  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 (nP 6Xq  
    finish_fiber();                                   RusC5\BUX  
  end; V\axOz!  
ibDMhW$n  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 2u9^ )6/  
show "Outputpowers:"                                   ！输出字符串Output powers： <:#O*Y{  
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） p/V  
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） {"33 .^=  
1](5wK-Z  
S312h'K j  
; ------------- 2N]u!S;d  
diagram 1:                   !输出图表1 %qA +z Pf  
[BS3y`c  
"Powers vs.Position"          ！图表名称 g*UI~rp  
)"7hyW5  
x: 0, L_f                      ！命令x: 定义x坐标范围 /BWJ)6#H  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 UA4Q9<>~  
y: 0, 15                      ！命令y: 定义y坐标范围 K GlO;Q~7  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 y<YVb@O.  
frame          ！frame改变坐标系的设置 0x'-\)v>3  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） _E5%Px5>L  
hx             ！平行于x方向网格 k*bfq?E a  
hy              ！平行于y方向网格 4XL*e+UfJ  
< 4DWH  
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 #8;|_RU  
  color = red,  ！图形颜色 cvn4Q-^  
  width = 3,   ！width线条宽度 cmDskQ:  
  "pump"       ！相应的文本字符串标签 9IL#\:d1  
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 S=O/W(ZB  
  color = blue,     qB3{65  
  width = 3, LV:oNK(  
  "fw signal" .vRLK  
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 4QWDuLu  
  color = blue, 02X~' To"  
  style = fdashed, Cna@3)_  
  width = 3, _>HX Q6Hw  
  "bw signal" -B2>~#L  
w<_.T#  
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 OVO0Emv  
  yscale = 2,            ！第二个y轴的缩放比例 hCO*gtA)M  
  color = magenta, p$}iBk0B(z  
  width = 3, s-r$%9o5  
  style = fdashed, *IzcW6 [9  
  "n2 (%, right scale)" &Pt|  
-tT{h 4  
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 76[aOC2Ad  
  yscale = 2, Ygn"7  
  color = red, [!{*)4$6  
  width = 3, 3+m#v8h1  
  style = fdashed, h$ M+Yo+  
  "n3 (%, right scale)" zMX7 #,  
>]"5K<-1  
I/9ZUxQCyG  
; ------------- !U#kUj:4I  
diagram 2:                    ！输出图表2 sSOI5W3A  
D8_m_M| P  
"Variation ofthe Pump Power" 9;Ezm<VQ  
GFvZdP`s4  
x: 0, 10 f(DGC2R <  
"pump inputpower (W)", @x +3vK=d_Va  
y: 0, 10 Ig1cf9 :  
y2: 0, 100 5(>m=ef"  
frame g'Ft5fQ"o/  
hx '#t"^E2$  
hy C 0*k@kGy  
legpos 150, 150 N`y!Km  
?7G?uk]3,@  
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 [8Ub#<]]  
  step = 5, -]5dD VSO  
  color = blue, ksY^w+>(!  
  width = 3, {AIP\  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签  yyk[oH-Q  
  finish set_P_in(pump, P_pump_in) @okC":Fw,  
E?z 3&C  
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 F=B>0Q5   
  yscale = 2, ? $pGG  
  step = 5, ZcX%:ebKS  
  color = magenta,  AO;+XP=  
  width = 3, BmUEo$w  
  "population of level 2 (%, rightscale)", Gyy:.]>&  
  finish set_P_in(pump, P_pump_in) PK3)M'[  
6luCi$bL  
f: (set_P_in(pump,x); 100 * n_av(3)),   ！改变泵浦信号功率对能级3上激活粒子占比的影响 0"u*Kn  
  yscale = 2, dz5bW>  
  step = 5, :<ujk  
  color = red, _@sqCf%|  
  width = 3, D8h ?s  
  "population of level 3 (%, rightscale)", 3w {4G<I  
  finish set_P_in(pump, P_pump_in) 8c+i+gp!  
*|$s0ga C  
 2b1LC!'U  
; ------------- ;^}cZ  
diagram 3:                         ！输出图表3 AyNl,Xyc4  
h'UWf"d  
"Variation ofthe Fiber Length" MnKEZ: 2  
|\?-k  
x: 0.1, 5 S_c#{4n  
"fiber length(m)", @x +ls *04  
y: 0, 10 $q.8ve0&^  
"opticalpowers (W)", @y j/9FiuK  
frame dSIMwu6u  
hx aU4'_%Y@  
hy $g#X9/+<  
0plRsZ}  
f: (set_L(x);P_out(signal_fw)),     ！改变光纤长度对信号光输出功率的影响 \C}tK,79  
  step = 20,             <6p{eGAQV  
  color = blue, }M'\s  
  width = 3, F8b*Mt}p  
  "signal output" xkUsZ*X8B  
28X)s!W'  
;f: (set_L(x);P_out(pump)),                     ！改变光纤长度对泵浦信号输出功率的影响 1P8$z:|~  
   step = 20, color = red, width = 3,"residual pump" }kL% l  
M/d!&Bk  
! set_L(L_f) {restore the original fiber length } LdWeI  
H W.S~eLw*  
zd#qBj]g  
; ------------- 0%F C;v0  
diagram 4:                                  ！输出图表4 S)g5Tu)  
^_5$+  
"TransverseProfiles" ?3KI}'}EM  
P|HY=RM a  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) sS5#Q  
J5J3%6I  
x: 0, 1.4 * r_co /um W'gCFX  
"radialposition (µm)", @x \iowAo$  
y: 0, 1.2 * I_max *cm^2 =\X<UA}  
"intensity (W/ cm&sup2;)", @y ^Po\:x%o  
y2: 0, 1.3 * N_Tm s%4)}w;z  
frame [`ttNW(_  
hx Qg9{<0{u  
hy 7 hnTHL  
h3@mN\=h'  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 (CZRX9TT1  
  yscale = 2, e5`{*g$i).  
  color = gray, VJ_E]}H  
  width = 3, A*\4C3a'%  
  maxconnect = 1, puXJ:yo(  
  "N_dop (right scale)" dhm ;  
ctt5t  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 & NOKrN~HX  
  color = red, iy$]9Wf6=@  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 3kYUO-qw  
  width = 3, Pq7YJ"Z?:  
  "pump" mhlJzGr*q  
krz@1[w-j  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 Fzu"&&>0$  
  color = blue, 'Iu$4xo`[  
  maxconnect = 1, vj{h*~  
  width = 3, .6vQWt7@  
  "signal" 1/le%}mK  
%gw0^^A  
qQpR gzw  
; ------------- _V8pDcY  
diagram 5:                                  ！输出图表5 Y;#P"-yH  
`]tXQqD  
"TransitionCross-sections" "me J n/  
^=R>rUCmv  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) hrcR"OZ~X  
[xI@)5Xk  
x: 1450, 2050 H,H'bd/  
"wavelength(nm)", @x ^lf;Lc  
y: 0, 0.6 8swj'SjX  
"cross-sections(1e-24 m&sup2;)", @y cp.)K!$  
frame :_Ng`b/  
hx "F%cn@l  
hy ?'h@!F%R'  
PkG+`N  
f: s12_Tm(x * nm) /1e-24,      ！Tm3+吸收截面与波长的关系 zD)2af  
  color = red, ~"=nt@M]  
  width = 3, {mkYW-4Se  
  "absorption" |(S=G'AtU  
f: s21_Tm(x * nm) /1e-24,  ！Tm3+发射截面与波长的关系 &+*jTE  
  color = blue, Keof{>V=CA  
  width = 3, u.!Pda  
  "emission" IL>Gi`Y&  
"2=v?,'t  
lileisgsz 2021-09-28 09:47
感谢，视频上有点看不清楚
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