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

(* b.F2m(e2  
Demo for program"RP Fiber Power": thulium-doped fiber laser, YB[P`Muj  
pumped at 790 nm. Across-relaxation process allows for efficient zPn8>J<.0Q  
population of theupper laser level. MEE]6nU  
*)            ！（*  *）注释语句 Rh39x-`Z  
0>vm&W<?)  
diagram shown: 1,2,3,4,5  ！指定输出图表 $%/Zm*H  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响  )57OZ  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 -<.>jX  
; 3:"Variation of the Fiber Length"！信号输出功率vs 光纤长度的变化，仿真最佳光纤长度 -1[ri8t;nV  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 .d;/6HD[y  
; 5:"Transition Cross-sections"    ！不同波长的跃迁横截面，横坐标波长，纵坐标为横截面 J?{uG8)  
OF)X(bi4j  
include"Units.inc"         ！读取“Units.inc”文件中内容 )s M}BY  
umc!KOkL  
include"Tm-silicate.inc"    ！读取光谱数据 *%8d
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7kO 1d{u6b  
; Basic fiberparameters:    ！定义基本光纤参数 =^6]N~*,D  
L_f := 4 { fiberlength }      ！光纤长度 U^.$k-|k  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 QJxcH$  
r_co := 6 um { coreradius }                ！纤芯半径 o9JJ_-O"  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 "p<f#s}  
{oO!v}]  
; Parameters of thechannels:                ！定义光信道 C0e< _6p=  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm ],#9L   
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 Da.vyp  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W FG?B:Zl%T  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um aXwFQ,  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 qRNGe8  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 % 30&6"  
.iw+#  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm y2)~ljR  
w_s := 7 um                          ！信号光的半径 Hc}(+wQN%  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 Xf
:-K(%e  
loss_s := 0                            ！信号光寄生损耗为0 =r`>tWs
  
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R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 g8^$,  
rN OwB2e  
; Function for defining themodel:   ！定义模型函数，一定要有calc命令，否则函数只会被定义，但不会被执行 W;2y.2*  
calc 
TJ#<wIiX  
  begin N'IzHyo.  
    global allow all;                   ！声明全局变量 od!TwGX  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 RE*;nSVFt  
    add_ring(r_co, N_Tm); V_h, UYN  
    def_ionsystem();              ！光谱数据函数 >QCVsX>~  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 8g$pfHt|e  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 l]GLkE  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 i9$ -lk  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 .#CTL|x  
    finish_fiber();                                   21W>}I"0?  
  end; "H6DiPh.E  
'(=krM9;  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 OF!(BJL  
show "Outputpowers:"                                   ！输出字符串Output powers： . F_pP2A  
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） ?bY'J6n.  
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） ``U>9S"p)  
G3m+E;o1  
%vgn>A?]1  
; ------------- (FP- K  
diagram 1:                   !输出图表1 L -<!,CASW  
rqSeh/<iD  
"Powers vs.Position"          ！图表名称 / F9BbG{  
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x1Y3 [  
x: 0, L_f                      ！命令x: 定义x坐标范围 [/\}:#MLe  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 <$R'y6U:  
y: 0, 15                      ！命令y: 定义y坐标范围 KftZ^mk+p  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 n}0[EE!  
frame          ！frame改变坐标系的设置 o^H.uBO{  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） Sw%^&*J  
hx             ！平行于x方向网格 "cj6i{x,~w  
hy              ！平行于y方向网格 /U+0T>(HS  
WQK ~;GV-  
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 g=Rl4F]  
  color = red,  ！图形颜色 ;5MI8  
  width = 3,   ！width线条宽度 =[`B -?  
  "pump"       ！相应的文本字符串标签 XC%u`UG  
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 Gu-6~^
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  color = blue,     "]B:QeMeF!  
  width = 3, &( aw  
  "fw signal" 7\HjQ7__  
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 8k vG<&D  
  color = blue, <>%2HRn<u  
  style = fdashed, "MOM@4\  
  width = 3, n Hz Xp:"  
  "bw signal" \2#7B8  
M8(N9)N  
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^wogIAV  
  yscale = 2,            ！第二个y轴的缩放比例 9bwG3jn4?  
  color = magenta, E
9<oA.  
  width = 3, *:}9(8d  
  style = fdashed, #%5[8~&  
  "n2 (%, right scale)" $MhfGMk!'  
N3"O
#C  
f: 100 * n(x, 3),          ！n(x ,3) 函数是计算x位置处激活粒子数在能级3上的占比 ?g+uJf  
  yscale = 2, L.X"wIs^  
  color = red, '(fQtQ%  
  width = 3, j2^Vz{  
  style = fdashed, &!N9.e:-]  
  "n3 (%, right scale)" RA^6c
![  
2Kwr
=t  
@^R6}qJ  
; ------------- S+2we  
diagram 2:                    ！输出图表2 _D.4=2@|l8  
{0?^$R8j  
"Variation ofthe Pump Power" J@$KF GUs  
As"% u  
x: 0, 10 <Ukeq0  
"pump inputpower (W)", @x AO[/-Uij  
y: 0, 10 \8Y62  
y2: 0, 100
o=C:=  
frame ((Uw[8#2`  
hx %/.yGAPkx  
hy T]oVNy  
legpos 150, 150 tK7v&[cI  
yVfF *nG  
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 CT{mzC8  
  step = 5, $-AG$1  
  color = blue, YUjKOPN  
  width = 3, "vvv@sYxi  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 ,B2p\  
  finish set_P_in(pump, P_pump_in) Ky[s&>02  
tY@+d*u  
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 hik.c3  
  yscale = 2, zoibinm}Eg  
  step = 5, E\1e8Wyh  
  color = magenta, .VXadgM  
  width = 3, @PzRHnT*  
  "population of level 2 (%, rightscale)", F81Kxcs  
  finish set_P_in(pump, P_pump_in) R+r;V]-/
 
SiLWy=qbR  
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 s.$:.*k  
  yscale = 2, .C|dGE?,  
  step = 5, #KUNZW  
  color = red, Lrjp  
  width = 3, >zX`qv&>  
  "population of level 3 (%, rightscale)", <IBWA0A=8a  
  finish set_P_in(pump, P_pump_in) A=96N@m6  
HC!5AJ&+}v  
@Ta0v:Y  
; ------------- g|Xjw Ti8$  
diagram 3:                         ！输出图表3 IE:;`e:\D  
Ve\.7s  
"Variation ofthe Fiber Length" Y>2oU`ly,  
fA)4'7UT  
x: 0.1, 5 TUN6`/"  
"fiber length(m)", @x D4jZh+_|
S  
y: 0, 10 Esdv+f}4;  
"opticalpowers (W)", @y wd*V,ZN7  
frame nTv^][
 
hx yk0^m/=C(  
hy K!a7Hg  
>@tJ7mM  
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 Z{^P
nit  
  step = 20,            
+2#pP  
  color = blue, .efbORp  
  width = 3, .A F94OlE/  
  "signal output" MjW{JR)I  
^!6T,7B B  
;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 8vx#QU8E/  
   step = 20, color = red, width = 3,"residual pump" wvI}|c  
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! set_L(L_f) {restore the original fiber length } J9&#);(  
DD'RSV5]  
w""  
; ------------- $Yj4&Two<  
diagram 4:                                  ！输出图表4 ~.Er  
|@rYh-5  
"TransverseProfiles" LHMA-0$?)  
9gFfbvd  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) 'XI-x[w  

s+9b.  
x: 0, 1.4 * r_co /um _|>bOI  
"radialposition (µm)", @x 4oPr|OKj{*  
y: 0, 1.2 * I_max *cm^2 b6^#{))"  
"intensity (W/ cm&sup2;)", @y Z8:'_#^@a[  
y2: 0, 1.3 * N_Tm ;y.<I&  
frame <3 I0$?xL  
hx i9^m;Y)^I  
hy Zr|\T7w 3  
es1'z.UJ  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 \tfhF#'  
  yscale = 2, ub-vtRpm  
  color = gray, &ER,;^H`6  
  width = 3, ,-)ww:  
  maxconnect = 1, vPsf{[Kr  
  "N_dop (right scale)" :@,UPc-+  
nXW]9zC"/  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 ?Lem|zo  
  color = red, A}CpyRVCn  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 y^:6D(SR  
  width = 3, KV|ywcGhT  
  "pump" "v+%F  
lT+N{[kLt*  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 $ItPUYi";  
  color = blue, 8]&lUMaqVZ  
  maxconnect = 1, u4~(0  
  width = 3, 70E@h=oQ  
  "signal" Dl_SEf6b  
S^  JUQx7  
HE*P0Yf=  
; ------------- C44*qiG.  
diagram 5:                                  ！输出图表5 J:2Su1"ODh  
p/?TU  
"TransitionCross-sections" 8zH/a   
o[>p  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) D}K/5iU]a  
Ffr6P }I  
x: 1450, 2050 aR0v qRF  
"wavelength(nm)", @x dMoN1
9F  
y: 0, 0.6 F>rf cW2  
"cross-sections(1e-24 m&sup2;)", @y n4G53+y'  
frame \?NT,t=3J  
hx J.pe&1  
hy @-BgPDi.Z  
"dBCS  
f: s12_Tm(x * nm) /1e-24,      ！Tm<sup>3+</sup>吸收截面与波长的关系 AK5$>Pkvk  
  color = red, Wg5i#6y8w  
  width = 3, {#%;HqP  
  "absorption" p&(~c/0  
f: s21_Tm(x * nm) /1e-24,  ！Tm<sup>3+</sup>发射截面与波长的关系 *,p
16"Q;  
  color = blue, D(gpF85t  
  width = 3, ]@7]mu:oL  
  "emission" n`g:dz  
OvW/{  

感谢，视频上有点看不清楚