[原创]RP Fiber Power仿真设计掺铥光纤激光器代码详解 [复制链接]

(* 9njl,Q:  
Demo for program"RP Fiber Power": thulium-doped fiber laser,  ?%,NOX  
pumped at 790 nm. Across-relaxation process allows for efficient cl4E6\?z  
population of theupper laser level. L|=5jn9 :  
*)            ！（*  *）注释语句 Q.mJ7T~T  
>fPo_@O  
diagram shown: 1,2,3,4,5  ！指定输出图表 N^Re  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 d!,t_jM0  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 @+u>rS|IB  
; 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 C 0w+ j  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 /A=w`[<  
; 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
r"7n2  
#.Rn6|V/4  
include"Units.inc"         ！读取“Units.inc”文件中内容 Luq4q95]  
pCIzpEsRs  
include"Tm-silicate.inc"    ！读取光谱数据 isQ(O  
@A/k"Ax{r  
; Basic fiberparameters:    ！定义基本光纤参数 Jz@~$L  
L_f := 4 { fiberlength }      ！光纤长度 (f#(B2j  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 "/W[gP[y%  
r_co := 6 um { coreradius }                ！纤芯半径 P?54"$b  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 22\!Z2@T/  
AU{"G  
; Parameters of thechannels:                ！定义光信道 drq3=2  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm /R)wM#&  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 ^kez]>   
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W FfoOJzf~o  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um G95,J/w  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 +#W94s~0V  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 o5 L^  
(Fv tL*  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm rO1!h%&o"  
w_s := 7 um                          ！信号光的半径 25^?|9o7  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 _fGTTw(  
loss_s := 0                            ！信号光寄生损耗为0 x]~TGz
S  
Wa_qD  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 pfA6?tP`  
T
CtZ2 <'  
; 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 9Em#Ela  
calc dUI5,3*  
  begin i|YS>Pw~j  
    global allow all;                   ！声明全局变量 v9*m0|T0M  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 x(_[D08/TT  
    add_ring(r_co, N_Tm); jlEz]@ i  
    def_ionsystem();              ！光谱数据函数 VtreOJ+  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 je4l3Hl  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 .g*j]!_]  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 @f!X%)\;x  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 okNo-\Dh!  
    finish_fiber();                                   ?$r`T]>`2  
  end; d0cL9&~qW  
NFK
`,  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 U84W(X  
show "Outputpowers:"                                   ！输出字符串Output powers： @ZKf3,J0  
show"pump:     ", P_out(pump):d3:"W"  ！输出字符串pump：和计算值（格式为3个有效数字，单位W） G#M)5'Q]U  
show"signal:   ",P_out(signal_fw):d3:"W" ！输出字符串signal：和计算值（格式为3个有效数字，单位W） \l%xuT  
1H)mJVIKkB  
hsZ/Vnn`  
; ------------- ~(5r+Z}*`  
diagram 1:                   !输出图表1 8`Ya7c>  
 >@ t  
"Powers vs.Position"          ！图表名称 <g4}7l8  
2ZH+fV?.  
x: 0, L_f                      ！命令x: 定义x坐标范围 taQE r2Zy  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 2iAC
_"n  
y: 0, 15                      ！命令y: 定义y坐标范围 nQ%HtXt;  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 JTlk[c  
frame          ！frame改变坐标系的设置 =W(*0"RM  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） yU$MB,1  
hx             ！平行于x方向网格 .8hI ad  
hy              ！平行于y方向网格 *6uccx7{  
WzMYRKZ  
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 2|1fb-AR  
  color = red,  ！图形颜色 ~6vz2DuB=  
  width = 3,   ！width线条宽度 M>Q]{/V7T  
  "pump"       ！相应的文本字符串标签 +Y\:Q<eMFg  
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 6|TSH$w_  
  color = blue,     1GY2aZ@  
  width = 3, {K(mfTqm  
  "fw signal" *[Hrbln  
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 98m|&7  
  color = blue, K%^n.  
  style = fdashed, (!j#u)O  
  width = 3, xU *:a[g
 
  "bw signal" ngY%T5-  
/ )0hsQs  
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 So:X!ljN(e  
  yscale = 2,            ！第二个y轴的缩放比例 bOY;IB _  
  color = magenta, ^;C&  
  width = 3, yPyu)  
  style = fdashed, ?J[3_!"t  
  "n2 (%, right scale)" ^0VL](bD>  
[oWkd_dK  
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 3v* ~CQy9  
  yscale = 2, 'CLZ7pV  
  color = red, L`NIYH<^  
  width = 3, 99m2aT()  
  style = fdashed, 8hRcB[F~S  
  "n3 (%, right scale)" W,q @ww u  
M5xJ_yjG  
8:cbr/F<  
; ------------- 9&Y@g)+2  
diagram 2:                    ！输出图表2 OvdT* g=8*  
Hl*v
S  
"Variation ofthe Pump Power"  %Bq~b$  
bbm\y] !t  
x: 0, 10 5/H,UL  
"pump inputpower (W)", @x qsj{0Go  
y: 0, 10 jU,Xlgz(A  
y2: 0, 100 $JE,u'JQ  
frame b*|~F  
hx 37AVk
`a  
hy i1iP'`
r  
legpos 150, 150 g40Hj Y  
%E?Srs}j  
f: (set_P_in(pump, x);P_out(signal_fw)), ！set_P_in(pump,x)改变泵浦信道功率；P_out(signal_fw)输出前向信号光 .RQra+up  
  step = 5, +z >)'#  
  color = blue, 8`=?_zF  
  width = 3, ZsGvv]P  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 @SQsEq+A?\  
  finish set_P_in(pump, P_pump_in) 5=>1>HYM  
Lp`.fn8Ln  
f: (set_P_in(pump,x); 100 * n_av(2)),   ！改变泵浦信号功率对能级2上激活粒子占比的影响 A2 l?F  
  yscale = 2, s.3"2waZ=T  
  step = 5, !oLn=  
  color = magenta, {I
#_0Q,i  
  width = 3, A^U84kV=  
  "population of level 2 (%, rightscale)", &|>@K#V8-;  
  finish set_P_in(pump, P_pump_in) |OQ]F  
hU)t5/h;K  
f: (set_P_in(pump,x); 100 * n_av(3)),   ！改变泵浦信号功率对能级3上激活粒子占比的影响 ~/OY1~c  
  yscale = 2, <O#&D|EMd|  
  step = 5, CEy\1D  
  color = red, 1$E(8"l  
  width = 3, d\z6Ob"t  
  "population of level 3 (%, rightscale)", ttP7-
y  
  finish set_P_in(pump, P_pump_in) =?
sG~  
w,{h9f  
X2w)J?pv  
; ------------- [-~pDkf:  
diagram 3:                         ！输出图表3 43=v2P0=Tj  
kR]P/4r  
"Variation ofthe Fiber Length" 8
NN+Z<  
z4u&#.bU  
x: 0.1, 5 :;?$5h*|`  
"fiber length(m)", @x ]uXJjS f  
y: 0, 10 0Tj,TF  
"opticalpowers (W)", @y U)}]Z@I-  
frame GT{4L]C  
hx wO??"${OH  
hy E^8|xT'h6  
L*z=!Dpo  
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 {kpad(E  
  step = 20,             %ms%0%  
  color = blue, LI,wSTVjC  
  width = 3, $b8[/],  
  "signal output" hgU;7R,?ir  
qHt/,w='Q  
;f: (set_L(x);P_out(pump)),                     ！改变光纤长度对泵浦信号输出功率的影响 !Ko2yn}6l  
   step = 20, color = red, width = 3,"residual pump" U}92%W?  
2>z YJqG|  
! set_L(L_f) {restore the original fiber length } .7iRV  
HoI6(t  
:!gNOR6Lh  
; ------------- /t5)&  
diagram 4:                                  ！输出图表4 T(|'.&a  
2mLZ4r>WE  
"TransverseProfiles" AD?zBg Zu  
%m&6'Rpfk  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) ~nZcA^b#DQ  
c*KE3:  
x: 0, 1.4 * r_co /um >Kgw2,y+  
"radialposition (µm)", @x {Jn0G;  
y: 0, 1.2 * I_max *cm^2 <q63?M
s'  
"intensity (W/ cm&sup2;)", @y 7QO/; zL  
y2: 0, 1.3 * N_Tm <G})$f'x2  
frame Yf0 
KG  
hx z/t|'8f  
hy -()WTdIy  
96WzgHPWo  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 .Fb#j+Lq  
  yscale = 2, OqtGKda  
  color = gray, J4bP(=w!  
  width = 3, Cqd\n#d/~  
  maxconnect = 1, *%xbn8  
  "N_dop (right scale)" Ak[X`e T  
x0j5D  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 ?N kKDvv  
  color = red, .*zN@y3  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 x*OdMr\n8?  
  width = 3, &ALnE:F  
  "pump" pBtO1x6x/  
<rC%$tr  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 Q-x>yau"  
  color = blue, D e&,^"%  
  maxconnect = 1, % /:1eE`!S  
  width = 3, M}] *
j  
  "signal" 9f~qD&~  
eV7;#w<]  
$6Ma{rC|  
; ------------- G'|ql5Zw  
diagram 5:                                  ！输出图表5 >u=  
.W]k8N E  
"TransitionCross-sections" {4_s:+v0  
^ `LqNG  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) &'6/H/J  
?Q:SVxzUd  
x: 1450, 2050 }s,NM%oI  
"wavelength(nm)", @x u\LNJo| B  
y: 0, 0.6 PUQ",;&y1  
"cross-sections(1e-24 m&sup2;)", @y FjCGD4x1N  
frame .7Mf(1:  
hx BU -;P  
hy 7@@g|l]  
-A#p22D,5  
f: s12_Tm(x * nm) /1e-24,      ！Tm³⁺吸收截面与波长的关系 a1pp=3Pd?~  
  color = red, 3IYF
vq~  
  width = 3, y._'o7%  
  "absorption" I\*6 >  
f: s21_Tm(x * nm) /1e-24,  ！Tm³⁺发射截面与波长的关系 ^ZMbJe%L  
  color = blue, !Z_+H<fi+I  
  width = 3, (xgw';g  
  "emission" $RDlM  
suEK;Bk9  

感谢，视频上有点看不清楚