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

(* O[X*F2LC4  
Demo for program"RP Fiber Power": thulium-doped fiber laser, AvL /gt:  
pumped at 790 nm. Across-relaxation process allows for efficient BD6!,  
population of theupper laser level. Y
A.&ap  
*)            ！（*  *）注释语句 {uDW<u_!  
hzD)yf  
diagram shown: 1,2,3,4,5  ！指定输出图表 #1YMpL  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 gI:g/ R  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 t Cuvb  
; 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 *h^->+0n  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 &oL"AJU  
; 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 N2h5@*1Y  
qxRsq&_  
include"Units.inc"         ！读取“Units.inc”文件中内容 YznL+TD  
32G
I+NN  
include"Tm-silicate.inc"    ！读取光谱数据 %PW-E($o<  
mR}8}K]L  
; Basic fiberparameters:    ！定义基本光纤参数 ,>|tQ'  
L_f := 4 { fiberlength }      ！光纤长度 01Ja
v~WR  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 Kq7r+A  
r_co := 6 um { coreradius }                ！纤芯半径 <Qq {&,Le  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 )Rr6@o  
#rHMf%0  
; Parameters of thechannels:                ！定义光信道 ~B<\#oO  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm v}>g* @  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 O"9t,B>=i  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W }$?
FR  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um )\U:e:Zae  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 =B&|\2`{)  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 ?[Yn
<|  
6O4*OR<&  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm Y XhZWo{B  
w_s := 7 um                          ！信号光的半径 p{?duq=  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 V``|<`!gd  
loss_s := 0                            ！信号光寄生损耗为0 St;9&A  
/
X8a3Eqp9  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 1I;q@g0  
GzEw~JAs  
; 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 V7$ m.P#uM  
calc j)ic7b  
  begin Vy&X1lG:  
    global allow all;                   ！声明全局变量 f:j:L79}  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 P IG,a~  
    add_ring(r_co, N_Tm); (~|)Gmq2  
    def_ionsystem();              ！光谱数据函数 \:'GAByy  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 j,rc9  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 oy[s])Tg  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 Zl_sbIY  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 5|0}bv O  
    finish_fiber();                                   n%r>W^2j  
  end; '[r:pwE  
_d!sSyk`  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 U& GPe
de  
show "Outputpowers:"                                   ！输出字符串Output powers： Vc\
g"1x  
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） CfOyHhhKX  
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） m.P F'_)/  
b'(AVA  

2tU3p<[  
; ------------- 'q}Ud10
c  
diagram 1:                   !输出图表1 yCz"~c  
&"u(0q  
"Powers vs.Position"          ！图表名称 n6[shXH  
hGFi|9/-u  
x: 0, L_f                      ！命令x: 定义x坐标范围 !fs ~ >  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 iBWzxPv:z  
y: 0, 15                      ！命令y: 定义y坐标范围 s=$xnc}mf  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 CCpRQKb=  
frame          ！frame改变坐标系的设置 M_O$]^I3w  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） l>jrY1u  
hx             ！平行于x方向网格 Q3=X#FQ  
hy              ！平行于y方向网格 +R?E @S  
[,&g46x22  
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 ?Gf'G{^}  
  color = red,  ！图形颜色 X6sZwb  
  width = 3,   ！width线条宽度 B^19![v3T  
  "pump"       ！相应的文本字符串标签  H#F"n"~$  
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 qY&(O`?m&  
  color = blue,     H!NGY]z*  
  width = 3, E.yFCaL  
  "fw signal" tL&_@PD)3  
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 -/3h&g  
  color = blue, nUY)LnI  
  style = fdashed, E;yr46  
  width = 3, ZyDf@(z`  
  "bw signal" 6n:X p_yO  
-X*.scw  
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 va~:Ivl-)  
  yscale = 2,            ！第二个y轴的缩放比例 2SC'Z>A  
  color = magenta,
]Y & 2&  
  width = 3, Y&VypZ"G>  
  style = fdashed, AU*]D@H  
  "n2 (%, right scale)" dyqk[$(  
HH*,Oe  
f: 100 * n(x, 3),          ！n(x ,3) 函数是计算x位置处激活粒子数在能级3上的占比
:wzbD,/M  
  yscale = 2, YTgT2w  
  color = red, =PU@'OG  
  width = 3, (3,7  
  style = fdashed, [)IaXa  
  "n3 (%, right scale)" ;J?fK69%  
+vFqHfmP  
NgGpLdaC2v  
; ------------- kPEU}Kv  
diagram 2:                    ！输出图表2 aSm</@tO&  
i(u zb<  
"Variation ofthe Pump Power" C#&b`  
hAi'|;g  
x: 0, 10 ,0L< w
a  
"pump inputpower (W)", @x .>`7d=KT  
y: 0, 10 O[ans_8  
y2: 0, 100 uxrNkZia  
frame T~>&m~} +  
hx *nM.`7g*[  
hy 4J[bh  
legpos 150, 150 cP21x<n  
_qit$#wK;  
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 X7aj/:fXe  
  step = 5, Yk4ah$}%-^  
  color = blue, RXPl~]k#i  
  width = 3, Xp^>SSt:4  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 )sEAPIka  
  finish set_P_in(pump, P_pump_in) (ds*$]  
XF4NRs  
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 7")&njQ/x  
  yscale = 2, i;)r|L`V?  
  step = 5, Qe<c@i"  
  color = magenta, oRn5blj  
  width = 3, 5OFb9YX  
  "population of level 2 (%, rightscale)", Z${@;lgP  
  finish set_P_in(pump, P_pump_in) KbRKPA`  
ht)KS9Xu  
f: (set_P_in(pump,x); 100 * n_av(3)),   ！改变泵浦信号功率对能级3上激活粒子占比的影响 ]o8~b-  
  yscale = 2, 87V
XVI  
  step = 5, Z=?qf$.}  
  color = red, !hPe*pPVV)  
  width = 3, g.EKdvY"%H  
  "population of level 3 (%, rightscale)", T/7[hj  
  finish set_P_in(pump, P_pump_in) [h :FJ  
l5k]voG  
!P)7t`X  
; ------------- TLzcQ|  
diagram 3:                         ！输出图表3 {QLqf  
PI")
^`  
"Variation ofthe Fiber Length" wa9{Q}wSa  
In4T`c?kQ  
x: 0.1, 5 > cJX'U9  
"fiber length(m)", @x @l2AL9z$m>  
y: 0, 10 jr5x!@rb  
"opticalpowers (W)", @y =HvLuVc  
frame _bq2h%G=8  
hx @*LESN>T@t  
hy xZ"kJ'C4}  
Q ?W6  
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 w3IU'(|G  
  step = 20,             $VJ=A<  
  color = blue, )@YrHS4  
  width = 3, D#9W [6  
  "signal output" 0g(hY:  
4a~9?}V:  
;f: (set_L(x);P_out(pump)),                     ！改变光纤长度对泵浦信号输出功率的影响 IF*k
Ll?  
   step = 20, color = red, width = 3,"residual pump" tU
7eW#"w  
!*xQPanL  
! set_L(L_f) {restore the original fiber length } <tTn$<b  
KH&xu,I  
, v6[#NU_Z  
; ------------- PFIL)D |G  
diagram 4:                                  ！输出图表4 L``K. DF  
WaWx5Fx+  
"TransverseProfiles" G#0 4h{  
Xl%&hM  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) tL4xHa6v]  
WYE[H9x1?  
x: 0, 1.4 * r_co /um "mE<r2=@  
"radialposition (µm)", @x p.1|bXY`  
y: 0, 1.2 * I_max *cm^2 :FdV$E]]<  
"intensity (W/ cm&sup2;)", @y $NWI_F4  
y2: 0, 1.3 * N_Tm NC2PW+(  
frame |v{a5|<E  
hx T3{qn$t8  
hy 2S8/ lsB  
)P.|Xk:r  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 z|yC[Ota  
  yscale = 2, GRj{*zs  
  color = gray, |^@TA
=_  
  width = 3, VG\ER}s&P  
  maxconnect = 1, G\IH b |  
  "N_dop (right scale)" fr\UX}o  
>[Q(!Ai  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 .|{*.YE  
  color = red, &e%y|{Y  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 TaB35glLY  
  width = 3, BZx#@356N  
  "pump" 58MBG&a%  
*Qg/W?"m  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 I\DT(9 'E  
  color = blue, ou-5iH?  
  maxconnect = 1, 5R,/X  
  width = 3, `&>!a  
  "signal" eA_1?j]E3  
!H,R$3~  
Ty]CdyL$  
; ------------- `pN]Ykt  
diagram 5:                                  ！输出图表5 h_d!G+-]  
8F4#
E U  
"TransitionCross-sections" \"PlM!0du  
DjL(-7'p  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) /sdkQ{J!.  
F{f "x
M  
x: 1450, 2050 ;nv4lxm  
"wavelength(nm)", @x |g4!Yd
 
y: 0, 0.6 >1mCjP  
"cross-sections(1e-24 m&sup2;)", @y P67r+P,  
frame })bTQj7  
hx Ctt{j'-[  
hy F+Lq  
K#F~$k|
1B  
f: s12_Tm(x * nm) /1e-24,      ！Tm<sup>3+</sup>吸收截面与波长的关系 I[
<C)IG  
  color = red, vC J  
  width = 3, X'[SCs  
  "absorption" [N#2uo  
f: s21_Tm(x * nm) /1e-24,  ！Tm<sup>3+</sup>发射截面与波长的关系 FK={%  
  color = blue, [>?B`1;@  
  width = 3, FJ>| l#nO  
  "emission" -\>Bphu,y
 
+\.gdL)  

感谢，视频上有点看不清楚