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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

(* C6T 9  
Demo for program"RP Fiber Power": thulium-doped fiber laser, )dN,b( w9  
pumped at 790 nm. Across-relaxation process allows for efficient 1 FIiX  
population of theupper laser level.  ;;"c+  
*)            ！（*  *）注释语句 T?}=k{C]  
$, @ rKRY  
diagram shown: 1,2,3,4,5  ！指定输出图表 c,s<q j  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 ewff(e9  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 fS$Yl~-m?  
; 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 Hd@T8 D*A  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 r'JK$9  
; 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 I8pxo7(-  
BxN#Nk~  
include"Units.inc"         ！读取“Units.inc”文件中内容 +iDz+3v(  
6V_5BpXt  
include"Tm-silicate.inc"    ！读取光谱数据 FVLA^$5c  
b8-^wJH!  
; Basic fiberparameters:    ！定义基本光纤参数 '`A67bdq)  
L_f := 4 { fiberlength }      ！光纤长度 P*^UU\x'4I  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 ojs/yjvx  
r_co := 6 um { coreradius }                ！纤芯半径 H-y-7PW*~  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 f*H}eu3/j  
Z.Y8z#[xg  
; Parameters of thechannels:                ！定义光信道 E rymx$@P  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm 1~iBzPU2  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 BO cEL%+  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W Y?SJQhN6W  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um ' xq5tRg>  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 =|t1eSzc  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 9!OCilG  
|`9zE]  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm y]z#??  
w_s := 7 um                          ！信号光的半径 HE .Dl7 {  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 Gqu0M`+7  
loss_s := 0                            ！信号光寄生损耗为0 sy#j+gZ   
j:<T<8 .o  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 w5G34[v  
9 u89P  
; 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 ;iI2K/ 3  
calc FQ&VM6_  
  begin ^\t">NJ^  
    global allow all;                   ！声明全局变量 GnHf9 JrR  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 CZno2$8@e  
    add_ring(r_co, N_Tm); F,$$N>  
    def_ionsystem();              ！光谱数据函数 5N}|VGN  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 24k}~"We  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 Gi_X+os  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 jtCob'n8  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 t#Yh!L6>  
    finish_fiber();                                   Ho{?m^  
  end; "tbBbEj?d  
XSIO0ep  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 *VAi!3Rx;  
show "Outputpowers:"                                   ！输出字符串Output powers： C 5!6k1TcE  
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） zT40,rk  
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） w0OK. fj  
e/l?|+m 6  
`l@t3/  
; ------------- Eu_0n6J  
diagram 1:                   !输出图表1 nr6[rq  
^8t*WphZC  
"Powers vs.Position"          ！图表名称 h v+i{Z9!]  
AYtcN4\/  
x: 0, L_f                      ！命令x: 定义x坐标范围 [_GR'x'0x  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 g)Uh   
y: 0, 15                      ！命令y: 定义y坐标范围 C_&tOt  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 SaScP  
frame          ！frame改变坐标系的设置 RLr-xg$K-t  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） V3nv5/6  
hx             ！平行于x方向网格 6!V* :.(  
hy              ！平行于y方向网格  5Ww\h  
0;`PHNBq  
f: P(pump, x),    ！命令f: 定义函数图；P(pump, x)函数是计算x位置处的泵浦光功率 FiH!) 6T  
  color = red,  ！图形颜色 ,*#M%Pv1t  
  width = 3,   ！width线条宽度 <0MUn#7'  
  "pump"       ！相应的文本字符串标签 z#!Cg*K(  
f: P(signal_fw, x),  ！P(signal_fw ,x) 函数是计算x位置处的前向信号光功率 [r~l O@  
  color = blue,     e6/} M3B  
  width = 3, qTex\qP  
  "fw signal" nP /$uj  
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 =sJHnWL[  
  color = blue, :"^$7  
  style = fdashed, g9Ll>d)tE3  
  width = 3, B)iJH  
  "bw signal" 0<;B2ce  
2Ki/K(  
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 Z/;SR""wa  
  yscale = 2,            ！第二个y轴的缩放比例  ,1kV9_x  
  color = magenta, "d\8OOU  
  width = 3, )HHzvGsL)  
  style = fdashed, ]+S QS^4  
  "n2 (%, right scale)" /267Q;d C)  
]YKWa"  
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 y2>] gX5  
  yscale = 2, D[?|\?  
  color = red, _u!G 6   
  width = 3, |0 VP^md  
  style = fdashed, YEj U3^@  
  "n3 (%, right scale)" 1jb@n xRjO  
kDQXP p  
; U4X U  
; ------------- Q^OzFfR6  
diagram 2:                    ！输出图表2 hkxZ=l  
$<#sCrNX  
"Variation ofthe Pump Power" W_EN4p~J  
c`Cn9bX  
x: 0, 10 >a K&T"  
"pump inputpower (W)", @x &3. 8i%  
y: 0, 10 '` "&RuB  
y2: 0, 100 Wov_jVdN\  
frame WBdb[N6\  
hx !{LwX Kf  
hy dWSH\wm+  
legpos 150, 150 Gz:a1-x  
R(fR1  
f: (set_P_in(pump, x);P_out(signal_fw)), ！set_P_in(pump,x)改变泵浦信道功率；P_out(signal_fw)输出前向信号光 M`FL&Ac  
  step = 5, |d8o<Q  
  color = blue, ~]Jfg$'  
  width = 3, d0d2QRX  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 I`l< }M  
  finish set_P_in(pump, P_pump_in) aMWNZv  
V7<} ;Lzm  
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 1+Oo Qs  
  yscale = 2, o^_am>h  
  step = 5, 4P5wEqU.<  
  color = magenta, c`cPGEv  
  width = 3, Wj0([n  
  "population of level 2 (%, rightscale)", ijfT!W  
  finish set_P_in(pump, P_pump_in) +$C5V,H ~  
o/#e y  
f: (set_P_in(pump,x); 100 * n_av(3)),   ！改变泵浦信号功率对能级3上激活粒子占比的影响 5Z'pMkn3  
  yscale = 2, j<u`W|vl  
  step = 5, a>6p])Wh  
  color = red, ,==lgM2V>  
  width = 3, MG|NH0k  
  "population of level 3 (%, rightscale)", 6IA~bkc}  
  finish set_P_in(pump, P_pump_in) \} 5\^&}_  
d>f5T l\E  
E*zk?G|  
; ------------- Sk xaSJ"  
diagram 3:                         ！输出图表3 y)2]:nD`B  
n$>H}#q  
"Variation ofthe Fiber Length" (Y%}N(Jg  
Im2g2 ]  
x: 0.1, 5 ` $}[np |  
"fiber length(m)", @x xYbF76B  
y: 0, 10 /@K?W=w4  
"opticalpowers (W)", @y ugz1R+f_4{  
frame d{  Z  
hx H3JWf MlW  
hy iPao54Z  
y9 "!ys  
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 ] GJskBm  
  step = 20,             xZhh%~  
  color = blue, xJ4T7 )*  
  width = 3, $%/Zm*H  
  "signal output"  )57OZ  
n']@Spm  
;f: (set_L(x);P_out(pump)),                     ！改变光纤长度对泵浦信号输出功率的影响 {"s8X(#_sC  
   step = 20, color = red, width = 3,"residual pump" (5SI! 1N  
~{J.br`  
! set_L(L_f) {restore the original fiber length } [e (-  
*ood3M[M^  
a83o (9  
; ------------- |m~|  
diagram 4:                                  ！输出图表4 |b|p0Z%7{  
6d,"GT  
"TransverseProfiles" :t(}h!7  
%k"-rmW  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) 6;ICX2Wq'  
;kdJxxUox  
x: 0, 1.4 * r_co /um Mb-C DPT  
"radialposition (µm)", @x 27)$;1MT:  
y: 0, 1.2 * I_max *cm^2 hsi#J^n{  
"intensity (W/ cm&sup2;)", @y ],#9L   
y2: 0, 1.3 * N_Tm 8YCtU9D  
frame [qc90)^Q,  
hx >LLFe~9`g  
hy avdi9!J2  
OA[w|Tt  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 7p|Pv;wp|  
  yscale = 2, ~s+\Y/@A  
  color = gray, \;4RD$J  
  width = 3, o4d>c{p  
  maxconnect = 1, _T H'v:C  
  "N_dop (right scale)" iidK}<o  
5'@}8W3b  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 k9a-\UIMet  
  color = red, LqW~QEU(  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 j  $L  
  width = 3, S-My6'ar  
  "pump" ,w c|YI)E  
wqJH  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 [<6ez;2q'  
  color = blue, 8g$pfHt|e  
  maxconnect = 1, l]GLkE  
  width = 3, i9$ -lk  
  "signal" pX"f "  
Rzw}W7zg[  
s(-$|f+s  
; ------------- L\!Pa+Iod  
diagram 5:                                  ！输出图表5 sOv:/'  
[i\K#O +f  
"TransitionCross-sections" x]w%?BlS  
kz]qk15w  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) ONg_3vD{  
Ak&eGd$d  
x: 1450, 2050 aR+vY1d"  
"wavelength(nm)", @x c.r]w  
y: 0, 0.6 pFhznH{0  
"cross-sections(1e-24 m&sup2;)", @y *IfLoKS'  
frame 7iT#dpF/A  
hx 4; y*y tY*  
hy QrDI$p7;'  
ELPzqBI  
f: s12_Tm(x * nm) /1e-24,      ！Tm3+吸收截面与波长的关系 o^H.uBO{  
  color = red, (6!W8x7  
  width = 3, B/AS|i] sM  
  "absorption" ??)IPRv?yF  
f: s21_Tm(x * nm) /1e-24,  ！Tm3+发射截面与波长的关系 -6@#Nq_iWU  
  color = blue, AfB,`l`k  
  width = 3, =[`B -?  
  "emission" 6;Wns'  
CN+[|Mz*p  
lileisgsz 2021-09-28 09:47
感谢，视频上有点看不清楚
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