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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

(* y"0! 7^  
Demo for program"RP Fiber Power": thulium-doped fiber laser, v|r#  
pumped at 790 nm. Across-relaxation process allows for efficient $k3l[@;hE  
population of theupper laser level. UazUr=| e  
*)            ！（*  *）注释语句 G?{uR6s>#  
lLeN`{?  
diagram shown: 1,2,3,4,5  ！指定输出图表 G`R2=bb8  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 jJY!;f  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 2Yd;#i)  
; 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 IY9##&c3>  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 4ze4{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 Jro%zZle  
3HmJixy  
include"Units.inc"         ！读取“Units.inc”文件中内容 }#f~"-O  
`zRm "G  
include"Tm-silicate.inc"    ！读取光谱数据 M)CE%/P  
3/((7O[  
; Basic fiberparameters:    ！定义基本光纤参数 . !;K5U  
L_f := 4 { fiberlength }      ！光纤长度 k39;7J  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 PP)-g0^@  
r_co := 6 um { coreradius }                ！纤芯半径 m:XMF)tW  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 ( u}tUv3  
H#j Z'I  
; Parameters of thechannels:                ！定义光信道 &ffd#2f`@  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm A Pu cA  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 o]*#|4-  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W 6>B_ojj:  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um >) PcK  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 4ky@rcD1  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 %CiZ>`5n#  
({AqL#x`u  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm PG/xX H  
w_s := 7 um                          ！信号光的半径 [6Gb@jG  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 j5>3Td.  
loss_s := 0                            ！信号光寄生损耗为0 V ZArdXTP  
ENi@R\ p  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 7Z<ba^r}  
kMLWF  
; 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 %7~~*_G  
calc Lk|%2XGO&  
  begin 5 J9,/M0  
    global allow all;                   ！声明全局变量 k9<P]%  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 g4 |s9RMD  
    add_ring(r_co, N_Tm); &qP&=( $  
    def_ionsystem();              ！光谱数据函数 KDX34Fr1  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 gf8DhiB  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 Sc zYL?w^  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 3o=K?eOdg  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 g"iLhm` L  
    finish_fiber();                                   ]dKLzW:l  
  end; zLxO\R!d  
8 3wa{m:  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 ]D;X"2I2'b  
show "Outputpowers:"                                   ！输出字符串Output powers： t:G67^<3  
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） ~)JNevLZ  
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） VY5/C;0^h  
_8CE|<Cn  
26,!HmtC  
; ------------- TYQ7jt0=.-  
diagram 1:                   !输出图表1 6:(*u{  
Ok=RhoZZ  
"Powers vs.Position"          ！图表名称 Wm/0Y'$r&k  
=hO0 @w  
x: 0, L_f                      ！命令x: 定义x坐标范围 U]Vu8$W  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 aAr gKM f  
y: 0, 15                      ！命令y: 定义y坐标范围 n%>c4*t  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 2,Og(_0>  
frame          ！frame改变坐标系的设置 ;oQ*gd  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） E  K)7g~  
hx             ！平行于x方向网格 p<2A4="&  
hy              ！平行于y方向网格 pUs s_3  
^hhJ6E_W  
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 9w Pc03a  
  color = red,  ！图形颜色 <= xmJx-V  
  width = 3,   ！width线条宽度 u2SnL$A7  
  "pump"       ！相应的文本字符串标签 w>:~Ev]  
f: P(signal_fw, x),  ！P(signal_fw ,x) 函数是计算x位置处的前向信号光功率 i 5"g?Wa2N  
  color = blue,     5m`@ 4%)zp  
  width = 3, .&AS-">Z  
  "fw signal" El~x$X*  
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 $Q[a^V~:  
  color = blue, ztNm,1pnQ  
  style = fdashed, 1Y"[Qs]"mU  
  width = 3, t UJ m}+=>  
  "bw signal" ][|)qQ%V  
C w<bu|?  
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 o!`.LL%  
  yscale = 2,            ！第二个y轴的缩放比例 .`OyC'  
  color = magenta, <m"yPi3TY  
  width = 3,  m/)Wn  
  style = fdashed, 8,BNs5  
  "n2 (%, right scale)" $q]:m+Fm  
'J (4arN  
f: 100 * n(x, 3),          ！n(x ,3) 函数是计算x位置处激活粒子数在能级3上的占比 ;IC:]Zu  
  yscale = 2, xr uQ=Q  
  color = red, W_NQi  
  width = 3, d~](S<k  
  style = fdashed, A#gmKS<J/7  
  "n3 (%, right scale)" fA!uSqR$V  
]o <'T.x  
:" 9 :J  
; ------------- @;iW)a_M  
diagram 2:                    ！输出图表2 b]v.jgD  
qm-G=EX  
"Variation ofthe Pump Power" fLj#+h-!  
N 4$!V}pp  
x: 0, 10 Iz/o|o]#  
"pump inputpower (W)", @x P;D)5yP092  
y: 0, 10 )1%l$W  
y2: 0, 100 .]+oE$,!  
frame A2{u("^[6  
hx @|:_?  
hy sgdxr!1?y  
legpos 150, 150 -hav/7g  
\$Xo5f<  
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 cD&53FPXC  
  step = 5, / AFn8=9'^  
  color = blue, F6*n,[5(  
  width = 3, b !FX]d1~k  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 c <8s \2  
  finish set_P_in(pump, P_pump_in) S}Wj+H;  
^EGe%Fq*x]  
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 D2o,K&V  
  yscale = 2, YGP.LR7  
  step = 5, -~O7.E(ok  
  color = magenta, isaDIl;L/  
  width = 3, UPs*{m  
  "population of level 2 (%, rightscale)", z;6 Tp  
  finish set_P_in(pump, P_pump_in) XK[cbVu  
8A{n9>jrb  
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 ~y.{WuUD  
  yscale = 2, A`Vz5WB  
  step = 5, vd Fy}#X  
  color = red, \F;V69'  
  width = 3, V)M+dhl  
  "population of level 3 (%, rightscale)", $2Y'[Dto\  
  finish set_P_in(pump, P_pump_in) ( H/JB\~r  
RG [*:ReB9  
CV%AqJN  
; ------------- Ek|#P{!  
diagram 3:                         ！输出图表3  LAG*H  
o2e aSG  
"Variation ofthe Fiber Length" 6 /^$SWd2  
zr~hGhfq  
x: 0.1, 5 %~`8F\Hiu  
"fiber length(m)", @x q_eGY&M  
y: 0, 10 )N`a4p  
"opticalpowers (W)", @y C8qA+dri  
frame BdcTKC  
hx _5'OQ'P2  
hy J;|r00M  
$\kqh$")  
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 U4]>8L  
  step = 20,             *-~B{2b<  
  color = blue, ".jY3<bQg  
  width = 3, >S4klW=*I  
  "signal output" x/*ndH  
qdoJIP{  
;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 &z[39Q{~  
   step = 20, color = red, width = 3,"residual pump" l:v:f@M&  
t(69gF\"  
! set_L(L_f) {restore the original fiber length } H^cB ?i  
OQ&?^S`8',  
@!z9.o;  
; ------------- r|t ;#  
diagram 4:                                  ！输出图表4 1:]iV}OFqR  
Jolr"F?  
"TransverseProfiles" p!^.;c  
RD_IGV   
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) Ei!5Qya>  
r8\"'4B1  
x: 0, 1.4 * r_co /um Lc ,te1  
"radialposition (µm)", @x j+0=)Q%I=  
y: 0, 1.2 * I_max *cm^2 bl. y4  
"intensity (W/ cm&sup2;)", @y 8&FnXhZg4  
y2: 0, 1.3 * N_Tm '`g#Zo  
frame JBa( O- T  
hx =KfV;.&  
hy '"C$E922  
q{/>hvl  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 $Lpt2:.((  
  yscale = 2, X2b<_j3  
  color = gray, ld58R  
  width = 3, =C{)i@ +  
  maxconnect = 1, MONfA;64/  
  "N_dop (right scale)" W =YFe<Q  
siveqz6h  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 PM3kI\:)m  
  color = red, s)Bl1\Q  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度  # Vz9j  
  width = 3, ,4$ZB(\  
  "pump" J@RhbsZn  
WE""be8  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 -V@vY42  
  color = blue, p9w<|ZQ]:  
  maxconnect = 1, J6Uo+0S  
  width = 3, dL%?k@R  
  "signal" ^CZ!rOSv  
BS<5b*wG  
a4HUP*  
; ------------- Oga/  
diagram 5:                                  ！输出图表5 TJS/O~=  
?f!w:z p  
"TransitionCross-sections" hKP7p   
r7w1~z  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) 3|4jS"t{f  
$$7Mq*a>  
x: 1450, 2050  qW8sJ=  
"wavelength(nm)", @x ` #Qlr+X  
y: 0, 0.6 9W3zcL8  
"cross-sections(1e-24 m&sup2;)", @y I}JC~=`j  
frame *?'nA{a)E  
hx 7b7~D +b  
hy tU2 8l.  
5Vo8z8]t`  
f: s12_Tm(x * nm) /1e-24,      ！Tm3+吸收截面与波长的关系 qN h:;`  
  color = red, YTH3t] &  
  width = 3, `I|$U)'  
  "absorption" pR6mS fer  
f: s21_Tm(x * nm) /1e-24,  ！Tm3+发射截面与波长的关系 !d Ns3d  
  color = blue, QcBuUFf!c  
  width = 3, }F3}-5![  
  "emission" \"!Fw)wj  
/VFh3n>I2  
lileisgsz 2021-09-28 09:47
感谢，视频上有点看不清楚
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