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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

(* X09i+/ICK  
Demo for program"RP Fiber Power": thulium-doped fiber laser, [QwqP=-6  
pumped at 790 nm. Across-relaxation process allows for efficient @3?dI@i(  
population of theupper laser level. 1f$1~5Z  
*)            !(*  *)注释语句 5^N` ~  
22EI`}"J  
diagram shown: 1,2,3,4,5  !指定输出图表 `I(5Aj"  
; 1: "Powersvs. Position"     !分号是注释;光纤长度对功率的影响 V~QOl=`K:  
; 2:"Variation of the Pump Power"  !泵浦光功率变化对信号输出功率的影响 Et;Ubj"+  
; 3:"Variation of the Fiber Length"!信号输出功率vs 光纤长度的变化,仿真最佳光纤长度 07vzVsQ}p  
; 4:"Transverse Profiles"             !横向分布,横坐标为半径位置 K6nNrd}p:  
; 5:"Transition Cross-sections"    !不同波长的跃迁横截面,横坐标波长,纵坐标为横截面 TTSq}sb}  
ZP<OyX?  
include"Units.inc"         !读取“Units.inc”文件中内容 6D4 j];~X  
g:&PjKA  
include"Tm-silicate.inc"    !读取光谱数据 l0%7u  
xv_Z$&9e>l  
; Basic fiberparameters:    !定义基本光纤参数 PWS5s^WM  
L_f := 4 { fiberlength }      !光纤长度 J>+~//C  
No_z_steps := 50 {no steps along the fiber } !光纤步长,大括号{ }是注释,相当于备注 '.XR,\g>  
r_co := 6 um { coreradius }                !纤芯半径 oLt%i:,A  
N_Tm := 100e24 { Tmdoping concentration }  !纤芯Tm离子掺杂浓度 ~@D{&7@  
=^w:G=ymS  
; Parameters of thechannels:                !定义光信道 Y>CZ  
l_p := 790 nm {pump wavelength }                !泵浦光波长790nm J/c5)IB|  
dir_p := forward {pump direction (forward or backward) }   !前向泵浦 YF)c.Q0  
P_pump_in := 5 {input pump power }                    !输入泵浦功率5W \*30E<;C_  
w_p := 50 um {radius of pump cladding }               !包层泵浦相应的半径 50um 0He^r &c3  
I_p(r) := (r <=w_p) { pump intensity profile }          !泵浦光强度分布 &[[Hfs2:-]  
loss_p := 0 {parasitic losses of pump wave }           !泵浦光寄生损耗为0 W'5c%SI  
(_Rl f$D  
l_s := 1940 nm {signal wavelength }                   !信号光波长1940nm S|_"~Nd=  
w_s := 7 um                          !信号光的半径 KtaoU2s  
I_s(r) := exp(-2 *(r / w_s)^2)            !信号光的高斯强度分布 b2hXFwPe  
loss_s := 0                            !信号光寄生损耗为0 *,Sa*-7(  
S8;5|ya  
R_oc := 0.70 {output coupler reflectivity (right side) }      !输出耦合反射率 2Jt*s$  
%5<Xa  
; 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 ,veI'WHMB  
calc K^c%$n:}+  
  begin Q\z9\mMG-  
    global allow all;                   !声明全局变量 #$u7:p [t  
    set_fiber(L_f, No_z_steps, '');        !光纤参数 ynZfO2kf  
    add_ring(r_co, N_Tm); 3moDu  
    def_ionsystem();              !光谱数据函数 Gi,4PD-ro  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  !泵浦光信道 Y".4."NX  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      !前向信号光信道 !InC8+be  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    !后向信号光信道 8LGNV&Edg  
    set_R(signal_fw, 1, R_oc);                                 !设置反射率函数 CD)JCv  
    finish_fiber();                                   KOhIk*AC '  
  end; uiaZ@  
gLWbd~  
; Display someoutputs in the Output window (on the right side): !在Output aera区域显示输出 )/BbASO$)Z  
show "Outputpowers:"                                   !输出字符串Output powers: A 7zL\U4  
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) GNM+sd y+  
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) =L, 7~9  
]=(PtzVa  
b4>1UZGW-  
; ------------- Z (C0+A\  
diagram 1:                   !输出图表1 D8)6yPwE  
LDj*~\vsq  
"Powers vs.Position"          !图表名称 nRheByYm  
'E4}++\  
x: 0, L_f                      !命令x: 定义x坐标范围 B[ r04YGh  
"position infiber (m)", @x      !x轴标签;@x 指示这些字符串沿坐标轴放置 dEPLkv  
y: 0, 15                      !命令y: 定义y坐标范围 />V& OX `  
y2: 0, 100                    !命令y2: 定义第二个y坐标范围 ??,/85lM  
frame          !frame改变坐标系的设置 e9rgJJ  
legpos 600, 500  !图行在图表窗口中的位置(相对于左上角而言) Dn+hI_"# _  
hx             !平行于x方向网格 dg@'5.ApPu  
hy              !平行于y方向网格 ?l^NKbw  
rchKrw  
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 MD[;Ha  
  color = red,  !图形颜色 k6(0:/C  
  width = 3,   !width线条宽度 1 ( rN  
  "pump"       !相应的文本字符串标签 U,Z7n H3_  
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 l|K$6>80  
  color = blue,     G)&S%R!i\N  
  width = 3, S X[  
  "fw signal" X> U _v  
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 F<Ig(Wl#az  
  color = blue, ,7SqR Y,+  
  style = fdashed, a[NR%Xq  
  width = 3, #:tC^7qk  
  "bw signal" &|fWtl;43  
P$6 Pe>3  
f: 100 * n(x, 2),    !n(x ,2) 函数是计算x位置处激活粒子数在能级2上的占比 j-7aJj%  
  yscale = 2,            !第二个y轴的缩放比例 QQ./!   
  color = magenta, MCl-er"]D  
  width = 3, pLtK:Z  
  style = fdashed, >lF@M-  
  "n2 (%, right scale)" kp^q}iS  
=&WH9IKz  
f: 100 * n(x, 3),          !n(x ,3) 函数是计算x位置处激活粒子数在能级3上的占比 JHg y&/  
  yscale = 2, R^@   
  color = red, ?{wD%58^oG  
  width = 3, Te7xj8<  
  style = fdashed, wx_j)Wij6  
  "n3 (%, right scale)" S%df'bh$  
NF'<8{~  
<l<6W-I   
; ------------- | &/_{T  
diagram 2:                    !输出图表2 /&zlC{:G92  
VI?kbq jo  
"Variation ofthe Pump Power" 8+8L'Yv;  
"pc t#  
x: 0, 10 ^SW0+O  
"pump inputpower (W)", @x 5jHr?C  
y: 0, 10 !HKW_m^3J  
y2: 0, 100 ;3+_aoY  
frame 5TLE%#G@+  
hx |2Uw8M7.E  
hy sCE%./h]  
legpos 150, 150 u=7 #_ZC9L  
>LJ<6s[=  
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 $>rKm  
  step = 5, 3zMaHh)mj  
  color = blue, \6%`)p  
  width = 3, +g_m|LF  
  "signal output power (W, leftscale)",     !相应的文本字符串标签 ^ LVKXr  
  finish set_P_in(pump, P_pump_in) %]N|?9L"=  
r(JP& @  
f: (set_P_in(pump,x); 100 * n_av(2)),   !改变泵浦信号功率对能级2上激活粒子占比的影响 H{1'- wB  
  yscale = 2, JthU' "K  
  step = 5,  vPAL,  
  color = magenta, 6xx(o  
  width = 3, f9vitFkb+  
  "population of level 2 (%, rightscale)", cJzkA^T9  
  finish set_P_in(pump, P_pump_in) .TNGiUzG  
Z:YgG.z"  
f: (set_P_in(pump,x); 100 * n_av(3)),   !改变泵浦信号功率对能级3上激活粒子占比的影响 Ru4M7 %  
  yscale = 2, #x \YA#~  
  step = 5, V,]Fh5f  
  color = red, \=Od1i  
  width = 3, FmgMd)#  
  "population of level 3 (%, rightscale)", WAJ KP"  
  finish set_P_in(pump, P_pump_in) jtgj h\Nt  
:"cKxd  
S2>$S^[U  
; ------------- Vz evOS  
diagram 3:                         !输出图表3 (,b\"Q  
0S$TLbx  
"Variation ofthe Fiber Length" g @NwW&  
QWE\Ud.q  
x: 0.1, 5 #"fn;  
"fiber length(m)", @x m@2=v q1f  
y: 0, 10 c-U]3`;Q  
"opticalpowers (W)", @y 1 ]ePU8  
frame z>)lp$  
hx oWEzzMRz  
hy  /#zs  
yQf(/Uxk*x  
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 .@$ A~/ YU  
  step = 20,             )>@%;\qV  
  color = blue, jwSPLq%  
  width = 3, G!lF5;Ad`  
  "signal output" HubK  
`uC^"R(m  
;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 uzh TNf  
   step = 20, color = red, width = 3,"residual pump" t<"%m)J  
4gZ)9ya   
! set_L(L_f) {restore the original fiber length } }$LnjwM;,  
{7%(m|(  
0[ (kFe  
; ------------- /T+%q#4  
diagram 4:                                  !输出图表4 }z qo<o  
"Y@q?ey[1  
"TransverseProfiles" uPE Ab2u="  
|(CgX6 l3  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) q *kLi~ Oe  
.o]9 HbIk5  
x: 0, 1.4 * r_co /um Y*IKPnPot2  
"radialposition (µm)", @x E<7$!P=z`  
y: 0, 1.2 * I_max *cm^2 u"m TS&  
"intensity (W/ cm&sup2;)", @y kSEgq<i!  
y2: 0, 1.3 * N_Tm (p] S  
frame oTrit_@3  
hx Wr-I~>D%_  
hy `I(ap{  
n)\(\V7  
f: N_dop(1, x * um,0),      !掺杂浓度的径向分布 HZ1nuA  
  yscale = 2, 9$D}j"  
  color = gray, g:@4/+TSt  
  width = 3, |~&cTDd  
  maxconnect = 1, R<ORw]  
  "N_dop (right scale)" GMB3`&qh  
yYSoJqj Q  
f: I(pump, -1, x *um, 0) * cm^2,    !泵浦光沿光纤径向的强度分布 HTMg{_r(%  
  color = red, *9aI\#}  
  maxconnect = 1,           !限制图形区域高度,修正为100%的高度 Y#6LNI   
  width = 3, a <Iikx  
  "pump" m/,80J8L+f  
hT`&Xb  
f: I(signal_fw, -1,x * um, 0) * cm^2,  !信号光沿光纤径向的强度分布 fxmY,{{  
  color = blue, 6ND*L0  
  maxconnect = 1, 1Zi` \N4T  
  width = 3,  g_Rp}6g  
  "signal" 0A-yQzL|  
%@|)&][hO  
2 /*z5  
; ------------- %LD(S*>7  
diagram 5:                                  !输出图表5 ^bfU>02Q6p  
v`G}sgn  
"TransitionCross-sections" Ro4!y:2|  
L,ax^]  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) -yb7s2o  
Jd',v  
x: 1450, 2050 .}T-R?  
"wavelength(nm)", @x Q laoa)d#  
y: 0, 0.6 .v+ W>  
"cross-sections(1e-24 m&sup2;)", @y u J]uz%  
frame 'Yh`B8  
hx 06Q9X!xD  
hy (ti!Y"e2  
-]{ _^  
f: s12_Tm(x * nm) /1e-24,      !Tm3+吸收截面与波长的关系 TBky+]p@  
  color = red, `Q#)N0  
  width = 3, Y3s8@0b3  
  "absorption" Zsmv{p  
f: s21_Tm(x * nm) /1e-24,  !Tm3+发射截面与波长的关系 &9z&#`AY]>  
  color = blue, wy{ sS}  
  width = 3, ma!C:C9#J  
  "emission" @&%/<|4P5  
w'XSkI_ay  
lileisgsz 2021-09-28 09:47
感谢,视频上有点看不清楚
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