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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

(* N(4y}-w$  
Demo for program"RP Fiber Power": thulium-doped fiber laser, sHBTB6)lx  
pumped at 790 nm. Across-relaxation process allows for efficient &\6},JN  
population of theupper laser level. AzJ;E tR  
*)            ！（*  *）注释语句 &)Qq%\EP4  
=Y|( }92  
diagram shown: 1,2,3,4,5  ！指定输出图表 e'$[PF  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 Rjq\$aY}%  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 zL+t&P[\  
; 3:"Variation of the Fiber Length"！信号输出功率vs 光纤长度的变化，仿真最佳光纤长度 'q:7PkN!p  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 &UnhYG{A  
; 5:"Transition Cross-sections"    ！不同波长的跃迁横截面，横坐标波长，纵坐标为横截面 v+{{j|x=  
%eofG]VM<  
include"Units.inc"         ！读取“Units.inc”文件中内容 (SW6?5  
&D{!zF  
include"Tm-silicate.inc"    ！读取光谱数据 *Lz'<=DLoW  
pEcYfj3M  
; Basic fiberparameters:    ！定义基本光纤参数 *8,W$pe3  
L_f := 4 { fiberlength }      ！光纤长度 qVfn(rZ  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 GNM>hQ)h:  
r_co := 6 um { coreradius }                ！纤芯半径 64U|]g d$  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 E@k'uyIu  
lFtEQ '}  
; Parameters of thechannels:                ！定义光信道 7P(o!%H  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm AC <2.i_  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 :t`W&z41  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W U'F}k0h?\'  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um @:CM<+  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 #Swc>jYc  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 ^cPVnl  
#'KM$l,P  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm |(W wh$  
w_s := 7 um                          ！信号光的半径 $#n9C79Z@  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 %E@o8  
loss_s := 0                            ！信号光寄生损耗为0 XYP RMa?  
n6Uh%rO7S|  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 3YLfh`6  
`T+>E0H(f  
; 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 Dx /w&v  
calc ?/MkH0[G=  
  begin x7E] }h  
    global allow all;                   ！声明全局变量 *LBF+L^C%  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 QChWy`x  
    add_ring(r_co, N_Tm); /2T  W?a  
    def_ionsystem();              ！光谱数据函数 W^^0Rh_  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 S[9b I&C  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 2"a%%fv  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 ,{:qbt  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 d_$0  
    finish_fiber();                                   ZMMx)}hS  
  end; S_Nm?;P  
J&h59dm-  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 :9 (kU  
show "Outputpowers:"                                   ！输出字符串Output powers： rU9")4sQ  
show"pump:     ", P_out(pump):d3:"W"  ！输出字符串pump：和计算值（格式为3个有效数字，单位W） um$U3'0e  
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） 1t/c@YUTy  
Y9f7~w^s  
<?KgzIq2  
; ------------- @Yb8CB  
diagram 1:                   !输出图表1 WLU_t65  
:,p3&2 I  
"Powers vs.Position"          ！图表名称 j8e=],sQ  
W?E01"p  
x: 0, L_f                      ！命令x: 定义x坐标范围 \M.?*p  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 lrHN6:x(Y4  
y: 0, 15                      ！命令y: 定义y坐标范围 Ag:/iB ]  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 K'8?%&IQ  
frame          ！frame改变坐标系的设置 q'H6oD`  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） LC=M{\  
hx             ！平行于x方向网格 N4VZl[7?  
hy              ！平行于y方向网格 >clVV6B  
W^[QEmyn  
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 GBg  
  color = red,  ！图形颜色 fuHNsrNlm  
  width = 3,   ！width线条宽度 n3V$Xtxw  
  "pump"       ！相应的文本字符串标签 . &}x[~g  
f: P(signal_fw, x),  ！P(signal_fw ,x) 函数是计算x位置处的前向信号光功率 d <ES  
  color = blue,     ?\4kV*/Cqz  
  width = 3, ]S?G]/k}  
  "fw signal" ho^c#>81  
f: P(signal_bw, x),   ！P(signal_bw ,x) 函数是计算x位置处的后向信号光功率 8%4v6No&*  
  color = blue, X0ugnQ6  
  style = fdashed, *j,noHUT~>  
  width = 3, h8.(Q`tli  
  "bw signal" U%1M?vT/  
SLkgIb~'X  
f: 100 * n(x, 2),    ！n(x ,2) 函数是计算x位置处激活粒子数在能级2上的占比 {be|G^.c  
  yscale = 2,            ！第二个y轴的缩放比例 Bf^K?:r"V  
  color = magenta, \Qnr0t@0  
  width = 3, 7w5l[a/  
  style = fdashed, 23=wz%tF  
  "n2 (%, right scale)" {Gfsiz6  
.aWwJZ=[  
f: 100 * n(x, 3),          ！n(x ,3) 函数是计算x位置处激活粒子数在能级3上的占比 #+" D?  
  yscale = 2, g] IPNW^n  
  color = red, %y>*9$<pXe  
  width = 3, kW%wt1",  
  style = fdashed, DD7D&@As  
  "n3 (%, right scale)" mDwuJf8}  
(NnE\2  
(Y&gse1}!  
; ------------- gQhYM7NP{5  
diagram 2:                    ！输出图表2 qa: muW  
2}P{7flDY  
"Variation ofthe Pump Power" _ !"[Zr  
h>xB"E|.  
x: 0, 10 nyhHXVRH  
"pump inputpower (W)", @x rWM5&M  
y: 0, 10 l'!_km0{d  
y2: 0, 100 bS|h~B]rd  
frame 5K|`RzZ`B$  
hx ij?]fXf:)y  
hy =y?Aeqq\fl  
legpos 150, 150 0Iyb}  
==KDr 0|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 a(-t"OL\  
  step = 5, SZxnYVY  
  color = blue, NS x-~)  
  width = 3, |a0@4 :  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 ^'sy hI\  
  finish set_P_in(pump, P_pump_in) |9m*? 7  
SrMfd7H8f  
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 'vZWk eo  
  yscale = 2, Oeg^%Y   
  step = 5, =jG."o  
  color = magenta, [m<8SOMG(  
  width = 3, Xa U ^^K  
  "population of level 2 (%, rightscale)", -Y"2c,~pH  
  finish set_P_in(pump, P_pump_in) -ebyW#  
Ni;jMc  
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 eY:jVYG(  
  yscale = 2, K9RRY,JB  
  step = 5, 7;#o?6!7  
  color = red, M;.:YkrUH  
  width = 3, JVx-4?  
  "population of level 3 (%, rightscale)", );p:[=$71  
  finish set_P_in(pump, P_pump_in) 0)vX  
)h%tEY$AJ  
IV`+B<3  
; ------------- Jd|E 4h~(  
diagram 3:                         ！输出图表3 <{HV|B7  
y&F&Z3t  
"Variation ofthe Fiber Length" %:-2P  
uH} }z!  
x: 0.1, 5 0bQ"s*K  
"fiber length(m)", @x 8(:O5#  
y: 0, 10 ]PH'G>x  
"opticalpowers (W)", @y 3qp\jh=FE  
frame UtB~joaR  
hx CY@#_z  
hy )c0Dofhg  
&X}i%etp^2  
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 al]-*=v7}  
  step = 20,             VF:<q  
  color = blue, 5W_Rg:J{P  
  width = 3, n 8)eC2 A  
  "signal output" e yByAT~W,  
H$3:Ra+ S  
;f: (set_L(x);P_out(pump)),                     ！改变光纤长度对泵浦信号输出功率的影响 Kl :x?"g)  
   step = 20, color = red, width = 3,"residual pump" Bh q]h  
~2 J!I^ J  
! set_L(L_f) {restore the original fiber length } KD..X~Me  
p<(b^{EX  
8/ CK(G  
; -------------  }}d,xI  
diagram 4:                                  ！输出图表4 gCI{g. [I!  
KN\tRE  
"TransverseProfiles" ]6?6 k4@  
I^gLiLUN*6  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) wvEdZGO8!  
CGZ3-OW@E  
x: 0, 1.4 * r_co /um |#O>DdKHT  
"radialposition (µm)", @x Cfst)[j  
y: 0, 1.2 * I_max *cm^2 Z2I2 [pA  
"intensity (W/ cm&sup2;)", @y ,D{D QJ(B  
y2: 0, 1.3 * N_Tm pb|,rLNZ  
frame 6"U$H$i.G  
hx /V E|FTs  
hy 3m/XT"D  
Nb/Z+  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 |il P>b  
  yscale = 2, }m.45n/  
  color = gray, 03dmHg.E!E  
  width = 3, Uizg.<.  
  maxconnect = 1, ^qNr<Ye  
  "N_dop (right scale)" te#Wv9x  
zXv2plw(  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 6fw2 ;$x"  
  color = red, :Mnl1;oh  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 j4]y(AA  
  width = 3, N9BfjT}  
  "pump" yz^Rm2$f9  
%v<BE tq  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 A0gRX]  
  color = blue, 7toDk$jJRg  
  maxconnect = 1, Pbl#ieZM  
  width = 3, :$&v4IW  
  "signal" Hie  
DDp\*6y3l  
{*K7P>&  
; ------------- 9wP,Z"  
diagram 5:                                  ！输出图表5 18G=j@k7  
QJtO~~-  
"TransitionCross-sections" ix_&<?8  
_'Hw` 0}s  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) wF$z ?L  
J42/S [Rt  
x: 1450, 2050 L}pj+xB  
"wavelength(nm)", @x {Z^q?~zC[  
y: 0, 0.6 \MB$Cwc  
"cross-sections(1e-24 m&sup2;)", @y r5'bt"K\>  
frame T3h1eU  
hx L_R(K89w  
hy p?'&P!  
"{M?,jP#  
f: s12_Tm(x * nm) /1e-24,      ！Tm3+吸收截面与波长的关系 :r}C&3  
  color = red,  Jju^4  
  width = 3, I)q"M]~  
  "absorption" ;><m[l6  
f: s21_Tm(x * nm) /1e-24,  ！Tm3+发射截面与波长的关系 j},3@TFh  
  color = blue, :HkX sZ  
  width = 3, -qdt$jIM  
  "emission" cng166}1A  
Nyl)B7/w  
lileisgsz 2021-09-28 09:47
感谢，视频上有点看不清楚
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