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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

(* fhIj+/{_O  
Demo for program"RP Fiber Power": thulium-doped fiber laser, Ny,A#-?  
pumped at 790 nm. Across-relaxation process allows for efficient F%Umau*1  
population of theupper laser level. 8t: &#h  
*)            ！（*  *）注释语句 3(})uV  
CU1\C*  
diagram shown: 1,2,3,4,5  ！指定输出图表 vLFaZ^(  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 S{i@=:  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 G4%M$LJ h  
; 3:"Variation of the Fiber Length"！信号输出功率vs 光纤长度的变化，仿真最佳光纤长度 dIa(</ }  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 |4> r"  
; 5:"Transition Cross-sections"    ！不同波长的跃迁横截面，横坐标波长，纵坐标为横截面 3J~kiy.nfW  
V /9"Xmv75  
include"Units.inc"         ！读取“Units.inc”文件中内容 ,9tbu!Pvq  
U"y'Kd  
include"Tm-silicate.inc"    ！读取光谱数据 J*~2 :{=%  
,x"yZ  
; Basic fiberparameters:    ！定义基本光纤参数 >l< ~Z;  
L_f := 4 { fiberlength }      ！光纤长度 ? Ga2K  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 <ivqe"m  
r_co := 6 um { coreradius }                ！纤芯半径 n vpPmc  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 -C-OG}XjI  
1;kG[z=A  
; Parameters of thechannels:                ！定义光信道 z5&%T}$tJ  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm nR@,ouB-$  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 u~- fK'/!|  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W JlDDM %  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um ?WQd  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 #w,WwL!  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 U]!.~ji3  
]AZ\5C-J  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm 2u*h*/  
w_s := 7 um                          ！信号光的半径 {I9 N6BQ&  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 Hdbnb[e  
loss_s := 0                            ！信号光寄生损耗为0 3pTS@  
_{*$>1q  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 K[LVT]3 n  
?F87C[o  
; Function for defining themodel:   ！定义模型函数，一定要有calc命令，否则函数只会被定义，但不会被执行 AJ?}Hel[0  
calc }y-;>i#m=g  
  begin Z"n'/S:q  
    global allow all;                   ！声明全局变量 : >wQwf  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 ()nKug`.@  
    add_ring(r_co, N_Tm); VU`z|nBW@  
    def_ionsystem();              ！光谱数据函数 b y|?g8  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 FJd8s*  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 3:~l2KIP4  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 v(Bp1~PPZM  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 [Zt# c C+  
    finish_fiber();                                   gN, k/U8  
  end; _/jUs_W  
s la*3~ ?*  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 /nY).lSH  
show "Outputpowers:"                                   ！输出字符串Output powers： 9QOr,~~s  
show"pump:     ", P_out(pump):d3:"W"  ！输出字符串pump：和计算值（格式为3个有效数字，单位W） AFINm%\/0  
show"signal:   ",P_out(signal_fw):d3:"W" ！输出字符串signal：和计算值（格式为3个有效数字，单位W） KcmDF4C2  
65waq~#  
_z<Y#mik  
; ------------- ^x_ >r6  
diagram 1:                   !输出图表1 @[5_C?2  
j(Fa=pi  
"Powers vs.Position"          ！图表名称 (zS2Ndp  
4/HY[FT  
x: 0, L_f                      ！命令x: 定义x坐标范围 9 wSl,B-  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 = GH@.3`X  
y: 0, 15                      ！命令y: 定义y坐标范围 c_ qcb7<~.  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 6^] `-4*W  
frame          ！frame改变坐标系的设置 '0CXHjZN  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） ^sT +5M^  
hx             ！平行于x方向网格 l$qStL*8O  
hy              ！平行于y方向网格 XN~#gm#  
Th7wP:iDP  
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 ` $.X[\*U  
  color = red,  ！图形颜色 %z-dM` i  
  width = 3,   ！width线条宽度 8S.')<-f  
  "pump"       ！相应的文本字符串标签 QmH/yy3.%  
f: P(signal_fw, x),  ！P(signal_fw ,x) 函数是计算x位置处的前向信号光功率 i!SW?\  
  color = blue,     ;OQ'B=uK  
  width = 3, I;kf #nvao  
  "fw signal" pAJ=f}",]E  
f: P(signal_bw, x),   ！P(signal_bw ,x) 函数是计算x位置处的后向信号光功率 i O%Zd[  
  color = blue, gro7*<  
  style = fdashed, JHvFIo   
  width = 3, Y]+e  Df  
  "bw signal" 5E]UI YAkV  
!y>lOw})Q  
f: 100 * n(x, 2),    ！n(x ,2) 函数是计算x位置处激活粒子数在能级2上的占比 3AdP^B<  
  yscale = 2,            ！第二个y轴的缩放比例 '^Pq(b~  
  color = magenta, wUru1_zjO  
  width = 3, q4sl=`L5Sp  
  style = fdashed, c&Gz> L  
  "n2 (%, right scale)" j}|N^A_ S  
y\F`B0#$  
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 K[Y c<Q  
  yscale = 2, =w',-+@  
  color = red, S}zC3  
  width = 3, f![xn2T  
  style = fdashed, gq H`GI  
  "n3 (%, right scale)" F3r S6_  
%'{V%IXQ  
I$aXnd6)  
; ------------- #'J~Xk   
diagram 2:                    ！输出图表2 5h|'DO x|o  
-;+m%"k5  
"Variation ofthe Pump Power" &q4ox71  
DapQ}2'_  
x: 0, 10 ky'|Wk6   
"pump inputpower (W)", @x W.yV/fu  
y: 0, 10 pGY [f@_x-  
y2: 0, 100 r@|R-Binz  
frame r> Fec  
hx 6b%`^B\  
hy !?BW_vY  
legpos 150, 150 h^%GE;N  
xh{mca>?G  
f: (set_P_in(pump, x);P_out(signal_fw)), ！set_P_in(pump,x)改变泵浦信道功率；P_out(signal_fw)输出前向信号光 5+y@ ]5&g  
  step = 5, ow-+>Y[qZ  
  color = blue, ^Lsc`<xC  
  width = 3, |tG05+M  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 +7Sf8tg\  
  finish set_P_in(pump, P_pump_in) ])N|[|$  
>ysriPnQ  
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 btUq  
  yscale = 2, |)^clkuGX  
  step = 5, k |^vCZ<(x  
  color = magenta, ;JAK[o8i  
  width = 3, |$M@09,F"  
  "population of level 2 (%, rightscale)", /r>IV`n{  
  finish set_P_in(pump, P_pump_in) kX igX-  
6e,Apj 0  
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 .JNcY]V#  
  yscale = 2, 'n>K^rA  
  step = 5, vB Sm=M  
  color = red, ~q{\;  
  width = 3, {*sGhGwr  
  "population of level 3 (%, rightscale)", ';_1rh  
  finish set_P_in(pump, P_pump_in) IS-}:~Pi  
(gLea  
k - FB  
; ------------- "P MO  
diagram 3:                         ！输出图表3 3b#L17D3_  
+IvNyj|  
"Variation ofthe Fiber Length" R_maNfS]Z  
|Es0[cU  
x: 0.1, 5 37#cx)p^f  
"fiber length(m)", @x T]^?l  
y: 0, 10 $?-7OXj<  
"opticalpowers (W)", @y Xc{ZN1 4n  
frame 9`&?hi49nK  
hx B i'd5B5  
hy yXkt:O,i  
gRHtgR)T3  
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 5;}2[3}[  
  step = 20,             { AFf:[G  
  color = blue, {JXf*IJ  
  width = 3, $Ru&>D#stK  
  "signal output" qbH %Hx  
V)=Z6ti  
;f: (set_L(x);P_out(pump)),                     ！改变光纤长度对泵浦信号输出功率的影响 >A<Df  
   step = 20, color = red, width = 3,"residual pump" L,#^&9bHa#  
z23#G>I&  
! set_L(L_f) {restore the original fiber length } NJk)z&M  
;r3}g"D@  
)u<eO FI+  
; ------------- 2_ wv C  
diagram 4:                                  ！输出图表4 w:v=se"U  
ka/nQ~_#<  
"TransverseProfiles" /\d(c/,4  
[M`=HhJ4  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) ,'=hjIel  
MBlBMUJk  
x: 0, 1.4 * r_co /um ea 2 `q  
"radialposition (µm)", @x 04~}IbeJ  
y: 0, 1.2 * I_max *cm^2 &m'?*O |  
"intensity (W/ cm&sup2;)", @y GKCM|Y  
y2: 0, 1.3 * N_Tm ;ed#+$Na  
frame w\Iqzpikr  
hx as(;]  
hy 6s5yyy=L%~  
wE?CvL  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布  >9{zQf!  
  yscale = 2, vmLpm xS  
  color = gray, a#$N%=j  
  width = 3, Yc|uD-y  
  maxconnect = 1, 0 k9<&  
  "N_dop (right scale)" EsTB(9c?  
5?w.rcN[j  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 bi.wYp(*6L  
  color = red, a_MFQf&KV  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 ';Nu&D#Ph  
  width = 3, lY8`5Uz  
  "pump" YtpRy% R  
S@Iw;V  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 #~S>K3(  
  color = blue, =HS4I.@c_5  
  maxconnect = 1, \ADLMj`F|  
  width = 3, $R?@L  
  "signal" e?P%wqB  
x)_r@l`$ix  
4v Lw?_".  
; ------------- Wxn#Rk#>  
diagram 5:                                  ！输出图表5 z+ ZG1\  
#3+~.,X9  
"TransitionCross-sections" {yS;NU`2  
)b9_C O}  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) `c9'0*-  
-=a[J;'q  
x: 1450, 2050 nE$ f  
"wavelength(nm)", @x 0<Q*7aY  
y: 0, 0.6 !b63ik15O~  
"cross-sections(1e-24 m&sup2;)", @y |mOMRP#'  
frame ^KbL ,T  
hx A? r^V2+j  
hy [~)x<=H8{  
_C$X04bU3V  
f: s12_Tm(x * nm) /1e-24,      ！Tm3+吸收截面与波长的关系 #Kl}= 1 4  
  color = red, @vt$MiOi  
  width = 3, 6@YH#{~Zpv  
  "absorption" *VDVC0R  
f: s21_Tm(x * nm) /1e-24,  ！Tm3+发射截面与波长的关系 dlR_ckp  
  color = blue, `XgFga)  
  width = 3, wDKELQ(y H  
  "emission" kC`Rd:5  
1qZG`Vz  
lileisgsz 2021-09-28 09:47
感谢，视频上有点看不清楚
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