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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

(* z7CYYU?  
Demo for program"RP Fiber Power": thulium-doped fiber laser, ] !H<vR$8  
pumped at 790 nm. Across-relaxation process allows for efficient aH6pys!O  
population of theupper laser level. fVkl-<?x  
*)            ！（*  *）注释语句 pxN'E;P-  
gp}S 1  
diagram shown: 1,2,3,4,5  ！指定输出图表 OJ 2M_q)e  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 WRgz]=W3w  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响  }N[sydL  
; 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 ,To ED  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 sqy5rug  
; 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`N1I  
5mV'k"Om#"  
include"Units.inc"         ！读取“Units.inc”文件中内容 6QV/8IX  
O~D}&M@/R  
include"Tm-silicate.inc"    ！读取光谱数据 ] =D+a&  
P)H%dJ ^l  
; Basic fiberparameters:    ！定义基本光纤参数 %H@fVWe2wT  
L_f := 4 { fiberlength }      ！光纤长度 :sn}D~  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 >3ODqRu  
r_co := 6 um { coreradius }                ！纤芯半径 $&4Zw6"=  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 ^b%AwzHH}  
n"pADTaB  
; Parameters of thechannels:                ！定义光信道 xj}N;FWo  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm D Lu]d$G  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 y0Tb/&xN  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W K+7xjFoDIR  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um { sZrI5   
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 \h yTcFb  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 &8(2U-  
j_{gk"2:d`  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm Vf:t!'WD?2  
w_s := 7 um                          ！信号光的半径 OS!47Z /q  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 iCH Z{<k  
loss_s := 0                            ！信号光寄生损耗为0 l"- D@]"  
X:dj5v  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 (d (whlF  
cx$Oh`-Car  
; Function for defining themodel:   ！定义模型函数，一定要有calc命令，否则函数只会被定义，但不会被执行 _x lgsa  
calc LR^b?.#>  
  begin }vL[N~5\  
    global allow all;                   ！声明全局变量 BG|Kw)z*KM  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 [fb-G5x  
    add_ring(r_co, N_Tm); :!|xg! |y  
    def_ionsystem();              ！光谱数据函数 "?Y0Ng[  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 )~J/,\  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 > 1r>cZn  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 Fb_~{q  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 {c$W-t):U|  
    finish_fiber();                                   KLxg  
  end; U9@q"v-  
JRG7<s $  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 wM|-u/9+  
show "Outputpowers:"                                   ！输出字符串Output powers： SsaF><{5R  
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） E{FNsa  
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） @ }[)uH  
w0.#/6  
?6[>HX;  
; ------------- bkY7]'.bz&  
diagram 1:                   !输出图表1 >s{[d$  
<uAqb Wu  
"Powers vs.Position"          ！图表名称 jHFdDw|N`  
^RY_j>i  
x: 0, L_f                      ！命令x: 定义x坐标范围 h\yYg'CC  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 yXkgGY5  
y: 0, 15                      ！命令y: 定义y坐标范围 kt@+UK."  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 aB$Y5  
frame          ！frame改变坐标系的设置 'al-C;Z  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） %xY'v$ %  
hx             ！平行于x方向网格 Obw uyhjQ  
hy              ！平行于y方向网格 *d%m.:)N  
"BTA"  
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 t!K|3>w  
  color = red,  ！图形颜色 [6c{t  
  width = 3,   ！width线条宽度 W}EO]A%f.\  
  "pump"       ！相应的文本字符串标签 NSxDCTw  
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 kQj8;LU  
  color = blue,     J${wU @_ %  
  width = 3, [H"Ods~_`  
  "fw signal" ;z&p(e  
f: P(signal_bw, x),   ！P(signal_bw ,x) 函数是计算x位置处的后向信号光功率 Y#Hf\8r,d  
  color = blue, F[J;u/Z  
  style = fdashed, mxXQBmW  
  width = 3, f'}23\>  
  "bw signal" (5atU |8r  
G;tIhq[$Vb  
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 DB?[h<^m  
  yscale = 2,            ！第二个y轴的缩放比例 n9)/(=)>*  
  color = magenta, WJ mj|$D  
  width = 3, j| 257D  
  style = fdashed, DTJ~.  
  "n2 (%, right scale)" 2Qn%p[#n  
Haturg  
f: 100 * n(x, 3),          ！n(x ,3) 函数是计算x位置处激活粒子数在能级3上的占比 Ble <n6  
  yscale = 2, ^^v\ T  
  color = red, 4u"O/rt  
  width = 3, yy%J{;  
  style = fdashed, (0Y6tcV]R  
  "n3 (%, right scale)" i8 dv|oa  
Q~`]0R159e  
}B"kJNxV  
; ------------- ^d!-IL_  
diagram 2:                    ！输出图表2 0C3CqGP  
}J:~}?^%n  
"Variation ofthe Pump Power" W~gFY#w  
m!v`nw]  
x: 0, 10 q7X /"Dfx  
"pump inputpower (W)", @x {y :/9  
y: 0, 10 Yj;$hV8j(  
y2: 0, 100 u0N1+-6kr+  
frame WM9QC59  
hx PF4Cs3m/  
hy ;o#dmG  
legpos 150, 150 u TOL  
Rg' 1 F  
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 *-g S u  
  step = 5, U+nwLxe'  
  color = blue, 4,FuQ}  
  width = 3, qA&N6`  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 ]W]Vkkg]  
  finish set_P_in(pump, P_pump_in) fU$zG"a_  
N=-hXgX^  
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 27gK Y Zf;  
  yscale = 2, $T~|@XH  
  step = 5, ~,dj)x 3M  
  color = magenta, sexnO^s  
  width = 3, ;Q-(tGd  
  "population of level 2 (%, rightscale)", :Bda]]Y=  
  finish set_P_in(pump, P_pump_in) ,sXa{U  
m &s0Ub  
f: (set_P_in(pump,x); 100 * n_av(3)),   ！改变泵浦信号功率对能级3上激活粒子占比的影响 :MpIx&  
  yscale = 2, ~^:/t<N  
  step = 5, G{YLyl/9  
  color = red, BpRQG]L  
  width = 3, T|r@:t[  
  "population of level 3 (%, rightscale)", \O`B@!da~  
  finish set_P_in(pump, P_pump_in) ll73}v  
_! \X>rfz  
hyFq>XFo  
; ------------- F5:4 B]ZF  
diagram 3:                         ！输出图表3 ZA+$ZU^  
Q:lSKf  
"Variation ofthe Fiber Length" IZniRd;  
vY6eg IO  
x: 0.1, 5 pn>zuH e  
"fiber length(m)", @x 1z0&+C3z  
y: 0, 10 CQQX7Y\  
"opticalpowers (W)", @y U*1rA/"n  
frame qFt%{~a S  
hx NZmmO )p4  
hy % ;09J  
H+\rCefba  
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 @\b*a]CV  
  step = 20,             hekAics6S  
  color = blue, _~fO8_vr  
  width = 3, >J|I  
  "signal output" s>E4.0[I%  
t&eY+3y,T  
;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 '&'? S  
   step = 20, color = red, width = 3,"residual pump" *!Vic#D%  
A: 0  
! set_L(L_f) {restore the original fiber length } iMYvCw/t6  
e*:[#LJ]C  
e#)}.   
; ------------- &> p2N  
diagram 4:                                  ！输出图表4 0 A/GWSmF  
j"yL6Q9P  
"TransverseProfiles" YLJH?=2@  
n +`(R]Q  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) _T<ney}Y<  
+TfMj1Zx  
x: 0, 1.4 * r_co /um z@{|Y;s  
"radialposition (µm)", @x g=:%j5?.e  
y: 0, 1.2 * I_max *cm^2 cg}46)^<QH  
"intensity (W/ cm&sup2;)", @y ]nEN3RJ  
y2: 0, 1.3 * N_Tm !s9<%bp3  
frame [}+0N GgR  
hx ;XZ5r|V}  
hy Zj[Bm\ 8  
w(<; $9  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 :DR G=-M  
  yscale = 2, ?so 3Kj6H  
  color = gray, /Vg R[  
  width = 3, sbQmPV  
  maxconnect = 1, ,iB)8Km@U  
  "N_dop (right scale)" A|c  :&i  
tt6ElP|D  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 s"=e (ob  
  color = red, [yf2_{*0T  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 _|g(BK2}  
  width = 3, AuX&  
  "pump" HEhdV5B  
I^qk`5w  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 L/c$p`-  
  color = blue, \#lh b  
  maxconnect = 1, mdoy1a  
  width = 3, A!ba_14  
  "signal" =uYSZR  
Q{0-pHr}  
psta&u\ q  
; ------------- {Ejv8UdA9  
diagram 5:                                  ！输出图表5 LrsP4G  
fu?>O /Gn/  
"TransitionCross-sections" ^>72<1U%  
r%&hiobMYs  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) Qo0okir  
!-|&  
x: 1450, 2050 (t&P. N/  
"wavelength(nm)", @x Z>7Oez>  
y: 0, 0.6 fFqK.^Tn  
"cross-sections(1e-24 m&sup2;)", @y k&n7 _[]n  
frame FwBktuS  
hx U-Fr[1I6p  
hy s^AQJ{X  
13}=;4O  
f: s12_Tm(x * nm) /1e-24,      ！Tm3+吸收截面与波长的关系 SdYES5aES  
  color = red, \Nb6E&+  
  width = 3, Rl=NVo  
  "absorption" t8U)za  
f: s21_Tm(x * nm) /1e-24,  ！Tm3+发射截面与波长的关系 L&Qdb xn  
  color = blue, u)t1t69T\g  
  width = 3, YEXJ h!X  
  "emission" Yu9Ccj`  
F<Z"W}I+6  
lileisgsz 2021-09-28 09:47
感谢，视频上有点看不清楚
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