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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

(* T(2*P5%&  
Demo for program"RP Fiber Power": thulium-doped fiber laser, Bq4^nDK  
pumped at 790 nm. Across-relaxation process allows for efficient O|I)HpG;  
population of theupper laser level. ZxvBo4>tH  
*)            ！（*  *）注释语句 i^2-PKPg{  
uk=f /nT  
diagram shown: 1,2,3,4,5  ！指定输出图表 |fhYft  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 M'-Z"  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 :7Jpt3  
; 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 0V[`zOO(o  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 q9iHJ'lMD*  
; 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(g6$Y{  
S?K x:]  
include"Units.inc"         ！读取“Units.inc”文件中内容 |w3b!  
}I>h<O  
include"Tm-silicate.inc"    ！读取光谱数据 $9}jU#Z|hd  
Oi-= Fp  
; Basic fiberparameters:    ！定义基本光纤参数 !Un &OAy.!  
L_f := 4 { fiberlength }      ！光纤长度 JNk6:j&Pf  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 o~J~-$T{  
r_co := 6 um { coreradius }                ！纤芯半径 NL} Q3Vv1.  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 aRE%(-5  
:N>n1tHL;A  
; Parameters of thechannels:                ！定义光信道 2?)8s"Y  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm PqVz ^(Wz  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 }Md5a%s<  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W 5[5|_H+0  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um Y~"5HP|  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 Wv7hY"  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 wJMk%N~R:  
$z48~nu@ j  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm _6!@>`u~  
w_s := 7 um                          ！信号光的半径 w8iXuRv  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 A\:u5(  
loss_s := 0                            ！信号光寄生损耗为0 B+r$_L&I  
.4O~a  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 r~q 3nIe/,  
2PTAIm Rq  
; 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 UEeq@ot/4  
calc }|u>b!7_.  
  begin 7GG:1:2+>  
    global allow all;                   ！声明全局变量 ,d`6 {ll  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 Ahf71YP  
    add_ring(r_co, N_Tm); z`esst\aV  
    def_ionsystem();              ！光谱数据函数 e~P4>3  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 UVlh7wjg  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 =;A >1g$  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 Bj*\)lG<  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 WNo7`)Kx  
    finish_fiber();                                   ec3zoKtV  
  end; [~{'"-3L0  
X`Jo XNqm  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 v9 *WM3  
show "Outputpowers:"                                   ！输出字符串Output powers： =lZtI6tZ  
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） $eiW2@  
show"signal:   ",P_out(signal_fw):d3:"W" ！输出字符串signal：和计算值（格式为3个有效数字，单位W） LTWiCI  
A~M.v0  
?DgeKA"A  
; ------------- CEh!X=Nn  
diagram 1:                   !输出图表1 X+[h]A  
twP%+/g]<  
"Powers vs.Position"          ！图表名称 w:nLm,  
SbXV'&M2AT  
x: 0, L_f                      ！命令x: 定义x坐标范围 )o`[wq  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 Y. Uca<{.[  
y: 0, 15                      ！命令y: 定义y坐标范围 ~+S,`8-P  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 ?<efKs  
frame          ！frame改变坐标系的设置 >J) 9&?  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） ?*L{xNC#  
hx             ！平行于x方向网格 (i;,D-  
hy              ！平行于y方向网格 X 4CiVV  
noZ!j>f{@l  
f: P(pump, x),    ！命令f: 定义函数图；P(pump, x)函数是计算x位置处的泵浦光功率 Mb:>  
  color = red,  ！图形颜色 }uiD8b{I  
  width = 3,   ！width线条宽度 rH$M6S  
  "pump"       ！相应的文本字符串标签 I3;03X<2  
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 Ejt?B')aB5  
  color = blue,     "h7Np/ m3  
  width = 3,  {HbSty  
  "fw signal" wnjAiIE5  
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 66{Dyn7J~  
  color = blue, Vy7 )_D  
  style = fdashed, q+2v9K@  
  width = 3, PwnfXsR  
  "bw signal" Nnq r{ub  
QB"+B]rV  
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 vD76IG jm  
  yscale = 2,            ！第二个y轴的缩放比例 _[h!r;DsG  
  color = magenta, q}gM2Ia'vY  
  width = 3, nm,(Wdr  
  style = fdashed, KGrYF  
  "n2 (%, right scale)" E<'V6T9bi  
*nB-] w/  
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 8Om4G]*|,  
  yscale = 2, ($Q|9>5,  
  color = red, L| ]fc9W:  
  width = 3, d)kOW!5\  
  style = fdashed, cb }OjM F  
  "n3 (%, right scale)" L KLLBrm:  
{~`{bnx^]7  
rN'8,CV  
; ------------- C9 j{:&  
diagram 2:                    ！输出图表2 U>0bgL  
v >cPr(  
"Variation ofthe Pump Power" !NMiWG4R  
K0|:+s@u  
x: 0, 10 umN4|X  
"pump inputpower (W)", @x '.]<lh!  
y: 0, 10 K=> j+a5$  
y2: 0, 100 9^E!2CJ  
frame 45H9pY w  
hx 5DJ!:QY!  
hy tA^CuJR  
legpos 150, 150 S^iT &;,  
)JhB!P(  
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 T%aM~dp  
  step = 5, _k#!^AJ}x  
  color = blue, Z|xgZG{  
  width = 3, C=t9P#g*.  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 j>G|Xv  
  finish set_P_in(pump, P_pump_in) |3g'~E?$  
'4}8WYKQ  
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 5 p ,HkV  
  yscale = 2, XB]>Z)  
  step = 5, a,h]DkD  
  color = magenta, y"k %Wa`*  
  width = 3,  |CAMdU  
  "population of level 2 (%, rightscale)", /vpwpVHIpG  
  finish set_P_in(pump, P_pump_in) =s9*=5r8  
xT-`dS0u  
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 (9b%'@A@m  
  yscale = 2, thz[h5C?C  
  step = 5, [x'D+!  
  color = red, vy-q<6T}:p  
  width = 3, rDGrq9  
  "population of level 3 (%, rightscale)", #'n.az=1  
  finish set_P_in(pump, P_pump_in) v8zOY#?  
:3{n(~  
HX ,\a`  
; ------------- }*S`1IWMj  
diagram 3:                         ！输出图表3 @|{8/s Oq  
YMVmpcz  
"Variation ofthe Fiber Length" 3R)|DGql=1  
Tj}%G  
x: 0.1, 5 4'td6F  
"fiber length(m)", @x mY]o_\`  
y: 0, 10 +No` 89Y  
"opticalpowers (W)", @y (\nEU! Y  
frame ab`9MJc;  
hx DVf}='en8  
hy /qFY $vj  
G @EEh.s9  
f: (set_L(x);P_out(signal_fw)),     ！改变光纤长度对信号光输出功率的影响 yCuLo`  
  step = 20,             G cB<i  
  color = blue, (}s& 84!  
  width = 3, z]D/Qr  
  "signal output" egH,7f(yP  
lbPn<  
;f: (set_L(x);P_out(pump)),                     ！改变光纤长度对泵浦信号输出功率的影响 5F!i%{XQvm  
   step = 20, color = red, width = 3,"residual pump" _# cM vl k  
pfw`<*e'  
! set_L(L_f) {restore the original fiber length } Yj'"Wg  
0O>M/ *W  
,3!TyQ \m'  
; ------------- nw#AKtd@x  
diagram 4:                                  ！输出图表4 9_8\xLk  
e,d}4 jy  
"TransverseProfiles" {,1>(  
9|Ylv:sR  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) 5,-:31(j\  
bYqv)_8  
x: 0, 1.4 * r_co /um \.>7w 1p  
"radialposition (µm)", @x y:_>R=sw  
y: 0, 1.2 * I_max *cm^2 o ZQ@Yu3  
"intensity (W/ cm&sup2;)", @y A 8-a}0Gh  
y2: 0, 1.3 * N_Tm /qMiv7m~Q  
frame PjXiYc&  
hx  P1)87P  
hy g<7Aln}Nl\  
0g HV(L?  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 7{7Y[F0  
  yscale = 2, %dzO*/8cWo  
  color = gray, 7SNdC8GZ~  
  width = 3, \En"=)A  
  maxconnect = 1, u,{R,hTDS  
  "N_dop (right scale)" @/:7G.  
O#p_rfQ  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 qz2`%8}F)  
  color = red, HXC\``E  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 %yd(=%)fMB  
  width = 3, 5g O9 <  
  "pump" g4YlG"O[~  
;$e)r3r`LV  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 LbYIRX  
  color = blue,  \m+=|  
  maxconnect = 1, wLb:FB2  
  width = 3, D u T6Od/f  
  "signal" f=VlO d  
oI'& &Bt  
w%..*+P  
; ------------- G e5Yz.Q v  
diagram 5:                                  ！输出图表5 q2'}S A/  
J*Ie# :J]  
"TransitionCross-sections" "K$c9Z8  
hc3tzB  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) Lusd kc7  
}fv7WhQ  
x: 1450, 2050 uPapINj  
"wavelength(nm)", @x Dsn=fht  
y: 0, 0.6 ;yyR_N S  
"cross-sections(1e-24 m&sup2;)", @y +u*Pi  
frame 4_sJ0=z-  
hx pLCS\AUTsv  
hy D$>&K&  
_}ii1fLv  
f: s12_Tm(x * nm) /1e-24,      ！Tm3+吸收截面与波长的关系  +a%D+  
  color = red, >)G[ww[  
  width = 3, ;\6@s3  
  "absorption" #5kclu%L$  
f: s21_Tm(x * nm) /1e-24,  ！Tm3+发射截面与波长的关系 7Z~JuTIZ  
  color = blue, V5i}^%QSs  
  width = 3, fR~0Fy Gp  
  "emission" Q672iR\#)  
j@^zK!mO  
lileisgsz 2021-09-28 09:47
感谢，视频上有点看不清楚
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