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

(* +nE>)ZH  
Demo for program"RP Fiber Power": thulium-doped fiber laser, OP`f[lCiL  
pumped at 790 nm. Across-relaxation process allows for efficient d5$D[,`1  
population of theupper laser level. c_3B:F
7  
*)            ！（*  *）注释语句 2aj1IBnz6/  
^.6[vmmq  
diagram shown: 1,2,3,4,5  ！指定输出图表 eX+36VG\  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 VBX)xQazU  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 t3@+idEb  
; 3:"Variation of the Fiber Length"！信号输出功率vs 光纤长度的变化，仿真最佳光纤长度 YNr"]SA@;  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 ;Z]Wj9iY  
; 5:"Transition Cross-sections"    ！不同波长的跃迁横截面，横坐标波长，纵坐标为横截面 Y;/@[AwF  
fB8, )&  
include"Units.inc"         ！读取“Units.inc”文件中内容 PMfW;%I.  
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include"Tm-silicate.inc"    ！读取光谱数据 +>"s)R43  
gQ_<;'m)2  
; Basic fiberparameters:    ！定义基本光纤参数 DZSS  
L_f := 4 { fiberlength }      ！光纤长度 0$*7lQ<a#M  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 h} `v0E  
r_co := 6 um { coreradius }                ！纤芯半径 xDo0bR(  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 i g(O$y  
$Zu?Gd?  
; Parameters of thechannels:                ！定义光信道 F\m^slsu7=  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm  0k (-  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 rYb5#aT[  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W wZ(1\ M(  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um J$#T_4 )  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 `HX:U3/  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 \O5L#dc#  
k+J%o%* <  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm cnu&!>8V  
w_s := 7 um                          ！信号光的半径 o701RG~)  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 j%6p:wDl  
loss_s := 0                            ！信号光寄生损耗为0 731Lz*IFg  
'(.5!7?Qc  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 yaR>?[h  
y98FEG#S}  
; 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
.C'\U[A{  
calc "^#O7.oVi+  
  begin ciblj?"Wi  
    global allow all;                   ！声明全局变量
7kLurv  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 S2$66xr#  
    add_ring(r_co, N_Tm); bo\ bs1  
    def_ionsystem();              ！光谱数据函数 jZA1fV  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 uj8saNu  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 o(hUC$vW  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 $gl|^
c\  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 mkSu $c  
    finish_fiber();                                   Nf| 0O\+%y  
  end; 0z>IYw|UB  
4|?(LHBD)  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 }>{R<[I!G  
show "Outputpowers:"                                   ！输出字符串Output powers： ),x0G*oebj  
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） 2j-l<!s  
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） rS [4Pey  
dcf,a<K\  
k-~}KlP  
; ------------- RdX+:!lD  
diagram 1:                   !输出图表1 b7sfr!t_d  
WsHDIp  
"Powers vs.Position"          ！图表名称 d:'{h"M6  
Ichg,d-M-K  
x: 0, L_f                      ！命令x: 定义x坐标范围 5gf ~/Zr  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 2XR!2_)O5  
y: 0, 15                      ！命令y: 定义y坐标范围 n*\o. :f  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 \l!+l  
frame          ！frame改变坐标系的设置 iHv+I~/
 
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） jkk%zu  
hx             ！平行于x方向网格 -b!?9T?}  
hy              ！平行于y方向网格 %Xc,l Y1?  
b$@I(.X:  
f: P(pump, x),    ！命令f: 定义函数图；P(pump, x)函数是计算x位置处的泵浦光功率 ^&;,n.X5Z  
  color = red,  ！图形颜色 |>ztx}\  
  width = 3,   ！width线条宽度 rZgu`5<a  
  "pump"       ！相应的文本字符串标签 q]4h#?.-1v  
f: P(signal_fw, x),  ！P(signal_fw ,x) 函数是计算x位置处的前向信号光功率 &b (*  
  color = blue,     H,D5)1Uu  
  width = 3, Qb {[xmc  
  "fw signal" 7&id(&y/  
f: P(signal_bw, x),   ！P(signal_bw ,x) 函数是计算x位置处的后向信号光功率 6w%n$tiX  
  color = blue, vAM1|,U  
  style = fdashed, N:B<5l '  
  width = 3, /4+L2O[  
  "bw signal" ozY$}|sjDT  
X@kgc&`0  
f: 100 * n(x, 2),    ！n(x ,2) 函数是计算x位置处激活粒子数在能级2上的占比 Z`kVyuQ  
  yscale = 2,            ！第二个y轴的缩放比例 +(!/(2>~  
  color = magenta, u0W6u} 4;  
  width = 3, Z(q]rX5"  
  style = fdashed, qlM<X?  
  "n2 (%, right scale)" ,=e.QAF!"  
:i{M1z I  
f: 100 * n(x, 3),          ！n(x ,3) 函数是计算x位置处激活粒子数在能级3上的占比 4rDVCXE  
  yscale = 2, GJ
dL1ptc  
  color = red, }k.yLcXM  
  width = 3, e#hg,I  
  style = fdashed, ViW2q"4=  
  "n3 (%, right scale)" &Sg]P  
29=ob("  
f I%8@ :  
; ------------- Gd|kAC g  
diagram 2:                    ！输出图表2 '9QEG
/v  
R?1Z[N  
"Variation ofthe Pump Power" 8pEA3py  
;HCK iHC  
x: 0, 10 '`;=d<'  
"pump inputpower (W)", @x g(zeOS]q}  
y: 0, 10 ^zTe9:hz/\  
y2: 0, 100 r\QV%09R  
frame iuj%.}  
hx |fyzb=Lg  
hy xbi\KT`~  
legpos 150, 150 1>[#./@  
>&\.{ aj  
f: (set_P_in(pump, x);P_out(signal_fw)), ！set_P_in(pump,x)改变泵浦信道功率；P_out(signal_fw)输出前向信号光  kMW9UUw  
  step = 5, Y;R,ph.a  
  color = blue, vJs6nVbK  
  width = 3, k5>UAea_  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 R1SFMI   
  finish set_P_in(pump, P_pump_in) GH':Yk  
TfJ*G6\7e#  
f: (set_P_in(pump,x); 100 * n_av(2)),   ！改变泵浦信号功率对能级2上激活粒子占比的影响 wdt2T8`I/  
  yscale = 2, +wz1kPRs  
  step = 5, Cgln@Rz  
  color = magenta, Y'0
00#+  
  width = 3, 4RctYMz  
  "population of level 2 (%, rightscale)", d
b_Qt'>  
  finish set_P_in(pump, P_pump_in) #)n$Q^9&  
0,-]O=   
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 9_
==C"F  
  yscale = 2, {Y/0BS2D  
  step = 5, r]-n,  
  color = red, MtwlZg`c3  
  width = 3, pq
]z%\$u  
  "population of level 3 (%, rightscale)", 7C
p/{l;d  
  finish set_P_in(pump, P_pump_in) {k=3OIp  
CH(Y.Kj-  
y=pW+$k  
; ------------- P0; y  
diagram 3:                         ！输出图表3 >VZxDJ$R  
~)#E?
:h5  
"Variation ofthe Fiber Length" 0t7)x8c  
>l
8?B L  
x: 0.1, 5 0'f\>4B  
"fiber length(m)", @x ysi=}+F.  
y: 0, 10 s]e`q4ip  
"opticalpowers (W)", @y tq,^!RSbZ  
frame wEq&O|Vj  
hx k?HdW(HA  
hy Kg~D~ +j  
UhDf6A`]  
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 Py#EjF12  
  step = 20,             ,<!*@xy7v  
  color = blue, dh%O {t  
  width = 3, Ohj^Z&j  
  "signal output" 2.</n}g  
l z"o( %D  
;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 &HLG<ISw  
   step = 20, color = red, width = 3,"residual pump" !"<rlB,J  
/Z]nV2$n)V  
! set_L(L_f) {restore the original fiber length } L_9uwua.B~  
W4av?H  
\
IC^z  
; ------------- \15'~]d  
diagram 4:                                  ！输出图表4 '\d ldg#P  
Rs{8vV  
"TransverseProfiles" E@otV6Wk[@  
SIm1fC  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) ]v5/K  
"oiN8#Hf  
x: 0, 1.4 * r_co /um sZ&6g<8#y  
"radialposition (µm)", @x I)#8}[vK  
y: 0, 1.2 * I_max *cm^2 GK-P6d  
"intensity (W/ cm&sup2;)", @y SJX9oVJeZ  
y2: 0, 1.3 * N_Tm _(?`eWo  
frame #%ld~dgz-  
hx ld#x'/  
hy "y*3p0E  
( ./MFf

 
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 #"c'eG0  
  yscale = 2, QjXJo$I6  
  color = gray, :4
)x  
  width = 3, &QD)1b[U  
  maxconnect = 1, Eo^m; p5  
  "N_dop (right scale)" fsK=]~<g  
Hmm0H6&u  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 4x-,l1NMR  
  color = red, Oq% TW|a#  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 ^/}4M'[w  
  width = 3, Qp[
Jw?a  
  "pump" qov<@FvE0  
zd8A8]&-  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 N2 3:+u<)E  
  color = blue, Kv!:2br  
  maxconnect = 1, 6 %aaK|0  
  width = 3, &d6ud|  
  "signal" jK/FzD0-  
6W1+@ q  
gloG_*W  
; ------------- u"oO._a(  
diagram 5:                                  ！输出图表5 kmTYRl )j  
_3%:m||,XP  
"TransitionCross-sections" XNx$^I=  
gQSVPbzK  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) k ?6d\Q  
1}c/l<d  
x: 1450, 2050 y2?9pVLa\y  
"wavelength(nm)", @x hR0a
5  
y: 0, 0.6 GTfM
*b  
"cross-sections(1e-24 m&sup2;)", @y Oprfp^L  
frame @$5~`?  
hx 4P)#\$d:  
hy 1 Vc_jYO@  
!nJl.Y$  
f: s12_Tm(x * nm) /1e-24,      ！Tm<sup>3+</sup>吸收截面与波长的关系 M
UZ]*n&0  
  color = red, kq(
><T  
  width = 3, =AzkE]  
  "absorption" \$4z@`nY  
f: s21_Tm(x * nm) /1e-24,  ！Tm³⁺发射截面与波长的关系 Hci>q`p#  
  color = blue, [S]q'c)  
  width = 3, OW=3t#"7Kp  
  "emission" D9P,[:"  
,KM%/;1Dm  

感谢，视频上有点看不清楚