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

(* Op)0D:BmR  
Demo for program"RP Fiber Power": thulium-doped fiber laser, kM3BP& 3m1  
pumped at 790 nm. Across-relaxation process allows for efficient aG}9Z8D  
population of theupper laser level. pN0c'COy^  
*)            ！（*  *）注释语句 &"tce6&
 
a LmVOL{  
diagram shown: 1,2,3,4,5  ！指定输出图表 mZ;yk(  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 2J4|7UwJ  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 G<
jpJ  
; 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 GYO\l.%V5y  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 0!vC0T[  
; 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 N^ D/}n  
-Ez|  
include"Units.inc"         ！读取“Units.inc”文件中内容 NxXVW  
Msd!4TrBJ  
include"Tm-silicate.inc"    ！读取光谱数据 INbjk;k  
^2kWD8c*  
; Basic fiberparameters:    ！定义基本光纤参数 (uG4W|?p  
L_f := 4 { fiberlength }      ！光纤长度 xD\Km>|i  
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~-X7)]  
r_co := 6 um { coreradius }                ！纤芯半径 TLSy+x_gX  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 p fBO5Ys  
3(5RUI-  
; Parameters of thechannels:                ！定义光信道 btOTDqG`a  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm MW`a>'0t?  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 u4<r$[]V  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W q5vs;,_ |  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um z}Z`kq+C  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 g Go  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 s3+O
=5  
{-Y_8@&  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm <;6])  
w_s := 7 um                          ！信号光的半径 ZM#WdP  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 T),:8/  
loss_s := 0                            ！信号光寄生损耗为0 T?\CAk>  
]F@md(J  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 BL8\p_U  
jVA~]a  
; 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 YjX=@  
calc sN C?o[9l!  
  begin &1h3o^K  
    global allow all;                   ！声明全局变量 *[SsvlFt  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 '!.;(Jo  
    add_ring(r_co, N_Tm); y:A0!75  
    def_ionsystem();              ！光谱数据函数 poeXi\e!(  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 ^z^>]Qd  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 FvJSJ.;E,  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 -1_Z*?
=-  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 Iv<9})2K  
    finish_fiber();                                   ob00(?;H  
  end; 
*n*y!z  
9#(QS+q~  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 WvJ?e  
show "Outputpowers:"                                   ！输出字符串Output powers： =P#!>*\ar  
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） yQA[X}  
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） p&4n3%(R@  
Nb#7&_f=  
V1:3  
; ------------- P\s+2/  
diagram 1:                   !输出图表1 .]e6TFsrO  
w3w*"M  
"Powers vs.Position"          ！图表名称 vf yva  
A pjqSz"  
x: 0, L_f                      ！命令x: 定义x坐标范围 0l6iv[qu5w  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 "<2bjy  
y: 0, 15                      ！命令y: 定义y坐标范围 >Y+KL  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 ~1'468  
frame          ！frame改变坐标系的设置 `az`?`i7  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） "?{yVu~9  
hx             ！平行于x方向网格 PbPP1G')  
hy              ！平行于y方向网格 668bJ.M\O  
nwo!A3w:  
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 )A0&16<  
  color = red,  ！图形颜色 [~<',,tA0|  
  width = 3,   ！width线条宽度 Mak9qaWqF>  
  "pump"       ！相应的文本字符串标签 9-Qtj49  
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 jp^WsHI3  
  color = blue,     Mdrv/x{  
  width = 3, GnOo+hB  
  "fw signal" 2jZ}VCzRG  
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 1Kh?JH  
  color = blue, ^.CX6%  
  style = fdashed, ]2%P``Yj  
  width = 3, t4k'9Y:\Q  
  "bw signal" W{+0iAYnp  
L||yQH7n  
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 |<|,RI?  
  yscale = 2,            ！第二个y轴的缩放比例 is?&%VY  
  color = magenta, R$fIb}PDr  
  width = 3, mF}k}0  
  style = fdashed, [T}]Ma*CS  
  "n2 (%, right scale)" W>s'4C`  
=(X'c.%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 b<(UmRxx3  
  yscale = 2, G^ZkY  
  color = red, wmr%h q  
  width = 3, ,Q#tA|:8j  
  style = fdashed, p\_qHq\;j  
  "n3 (%, right scale)" lq8ko@  
YaZt+WA  
r)5\3j[P  
; ------------- bus=LAJt=  
diagram 2:                    ！输出图表2 m=.7f
9  
h==GdS4  
"Variation ofthe Pump Power" `O=;
E`ep  
iB3+KR  
x: 0, 10 xnQGCw?S&}  
"pump inputpower (W)", @x gZEA;N:H%<  
y: 0, 10 !$xEX,vj|W  
y2: 0, 100 K}=8:BaUL  
frame y [9}[NMZ  
hx \Tf{ui  
hy eAYW%a  
legpos 150, 150 Zc3:9  
Px7g\[]  
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 xFm{oJ!]&  
  step = 5, T{H#]BF<E  
  color = blue, lZA>L, \d  
  width = 3, ]t*P5  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 iRwW>a3/  
  finish set_P_in(pump, P_pump_in) :IT U0%;!+  
~:}XVt0%8  
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 \m~\,em  
  yscale = 2, !+45=d 5  
  step = 5, ck
jVa\  
  color = magenta, ;Q>3N(  
  width = 3, 7YXXkdgbd  
  "population of level 2 (%, rightscale)", ?tC}M;~  
  finish set_P_in(pump, P_pump_in) )Kk(P/s  
FX|lhwmc(  
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 h GA0F9.U  
  yscale = 2, FP'u)eU&3  
  step = 5, 3@
F+E\k  
  color = red, (_&V9vat=  
  width = 3, 4}8+)Pd  
  "population of level 3 (%, rightscale)", Q"6hD?6.  
  finish set_P_in(pump, P_pump_in) n|mJE,N  
!!+/Wgd:6  
 `\|3 ~_v  
; ------------- ,4>WLJDo  
diagram 3:                         ！输出图表3 \,%o>M'  
4'{h
I;&a&  
"Variation ofthe Fiber Length" &v auLp  
itC *Z6^  
x: 0.1, 5 b?2X>QJ  
"fiber length(m)", @x lGnql1(  
y: 0, 10 Q 9gFTLQ  
"opticalpowers (W)", @y yrE,,N%I  
frame  ny  
hx V:F+HM
Bk  
hy CVGOX z  
(@WDvgi(  
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 Hc&uE3=%sL  
  step = 20,             orQV'  
  color = blue, (w#slTFT  
  width = 3, iA%' ;V  
  "signal output" SZK
)q  
2iR:*}5  
;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 _8x'GK tU  
   step = 20, color = red, width = 3,"residual pump" A^4kYOe  
Q/3tg  
! set_L(L_f) {restore the original fiber length }  {+/ .5  
w$b+R8.n)  
u1pc5 Y{  
; ------------- /H%<oAjp6  
diagram 4:                                  ！输出图表4 *< $c =  
s}[A4`EWH  
"TransverseProfiles" 5!S
oN}$  
;*wT,2;  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) n{.*El>{  
M|[@znzR<  
x: 0, 1.4 * r_co /um jHu,u|e0>S  
"radialposition (µm)", @x 1Es*=zg  
y: 0, 1.2 * I_max *cm^2 3XApY'  
"intensity (W/ cm&sup2;)", @y +(=0CA0GE  
y2: 0, 1.3 * N_Tm Mz/]DJ8  
frame 9zoT6QP4  
hx DnG/ n  
hy B@"SOX  
KJ0xp hf  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 (c(-E|u.  
  yscale = 2, ~),;QQ,  
  color = gray, >bX-!<S  
  width = 3, xZ.~:V03\t  
  maxconnect = 1, -~vl+L  
  "N_dop (right scale)" D4=..;  
x9x#'H3  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 /R
J6nmN@}  
  color = red, PwFQ#Z  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 `2B*CMW{  
  width = 3, 9*}i
Bs  
  "pump" ^eTDD  
wMH[QYb<*  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 {h
/OnBwG  
  color = blue, lj "Z  
  maxconnect = 1, Q(~3pt
 
  width = 3, /~o7Q$)-b  
  "signal" YBYBOH  
8iMF8\  
XKz;o^1a^  
; ------------- _o@(wGeu#  
diagram 5:                                  ！输出图表5 Fb<n0[m  
g  ,/a6M  
"TransitionCross-sections" N5pinR5 H  
~t'#nV  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) Zdv.PGn  
Ujce |>Wn  
x: 1450, 2050 L# `lQ"`K  
"wavelength(nm)", @x D+@-XU<Lp<  
y: 0, 0.6 w)45SZ.  
"cross-sections(1e-24 m&sup2;)", @y +R|U4`12  
frame $q Zc!Qc  
hx P'a0CE%  
hy 5SoZ$,a<e  
!MZ+-dpK  
f: s12_Tm(x * nm) /1e-24,      ！Tm³⁺吸收截面与波长的关系 ,sO:$  
  color = red, Yw6DJ
Y  
  width = 3, Jt##rVN  
  "absorption" rPRrx-A  
f: s21_Tm(x * nm) /1e-24,  ！Tm³⁺发射截面与波长的关系 vS7/~:C  
  color = blue, |HrM_h<X  
  width = 3, K^"w]ii=  
  "emission" )>(L{y|uYX  
u9TzZ  

感谢，视频上有点看不清楚