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

(* PDtaL  
Demo for program"RP Fiber Power": thulium-doped fiber laser, *V
D-c  
pumped at 790 nm. Across-relaxation process allows for efficient 6r^(VT  
population of theupper laser level. :vm*miOF  
*)            ！（*  *）注释语句 dhV=;'   
j]kx~  
diagram shown: 1,2,3,4,5  ！指定输出图表 rH & ^SNc  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 *P9)M%  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 "y62Wo6m)  
; 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 OI1&Z4Lx  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 IV!&jL  
; 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 VFRUiz/C  
gx#TRp}-
 
include"Units.inc"         ！读取“Units.inc”文件中内容 x! Z|^q  
S3.Pqp_<  
include"Tm-silicate.inc"    ！读取光谱数据 ;i\i+:=  
``0knr <  
; Basic fiberparameters:    ！定义基本光纤参数 s%I)+|  
L_f := 4 { fiberlength }      ！光纤长度 V
o%@bj~>  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 F2lTDuk>C  
r_co := 6 um { coreradius }                ！纤芯半径 R5|c4v{B  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 pOx0f;'G+  
D4[t@*m>7  
; Parameters of thechannels:                ！定义光信道 zQ5'q  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm v=@Z,-  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 f%d7?<rw  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W bT0CQ_g21  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um uh@ZHef[l  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 td%EbxJK]`  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 #6@7XC  
s [@II]  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm DzH1q r  
w_s := 7 um                          ！信号光的半径 w {6kU   
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 /tDwgxJ  
loss_s := 0                            ！信号光寄生损耗为0 ub7|'+5  
v2/@Pu!kg  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 qfx=   
A6pPx1-&  
; 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 6-j><'  
calc w}X<]u  
  begin A^*0{F?,)  
    global allow all;                   ！声明全局变量 K-Y;[+#g1o  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 Z;-=xp
 
    add_ring(r_co, N_Tm); FK{Vnj0  
    def_ionsystem();              ！光谱数据函数 p^<*v8,~7  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 "NMX>a,(  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 QS\H[?M$  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 {f<2VeJ  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 <$qe2FtUq  
    finish_fiber();                                   'MVE5  
  end; -Uh3A\#(  
,l1A]Wx  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 }f?$QSF  
show "Outputpowers:"                                   ！输出字符串Output powers： sZx
f.  
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） |@!4BA  
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） Lzm9K
h;  
Mj2`p#5wKh  
N7=lSBm  
; ------------- tHgu#k0  
diagram 1:                   !输出图表1  _xjw:  
(_Ph{IN  
"Powers vs.Position"          ！图表名称 }(FF^
Mh  
I($0&Y\De  
x: 0, L_f                      ！命令x: 定义x坐标范围 PFq1Zai}n|  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 mu@He&w"  
y: 0, 15                      ！命令y: 定义y坐标范围 #Ie/|  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 bvzNur_  
frame          ！frame改变坐标系的设置 Kg4\:A7Sa.  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） /Ps/m!  
hx             ！平行于x方向网格 -Ri/I4Xj  
hy              ！平行于y方向网格 e98f+,E/  
EX@wenR  
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 m~c6b{F3Z-  
  color = red,  ！图形颜色 $S(<7[Z  
  width = 3,   ！width线条宽度 icS%])3LF  
  "pump"       ！相应的文本字符串标签 ]L)l5@5^  
f: P(signal_fw, x),  ！P(signal_fw ,x) 函数是计算x位置处的前向信号光功率 w>S;}[fM  
  color = blue,     =[5F~--Tf  
  width = 3, {8]Yqx)1]]  
  "fw signal" 'vCl@x$  
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 5!-+5TJI  
  color = blue, "}*5'e.*  
  style = fdashed, [L(qrAQ2|z  
  width = 3, $y{rM%6JU  
  "bw signal" ~xPU#m<  
&;3iHY;  
f: 100 * n(x, 2),    ！n(x ,2) 函数是计算x位置处激活粒子数在能级2上的占比 \*yH33B9  
  yscale = 2,            ！第二个y轴的缩放比例 W2>VgMR [  
  color = magenta, Y(mnGaVn  
  width = 3, l/xpAx  
  style = fdashed, aoqG*qh}b  
  "n2 (%, right scale)" OKi}aQ2R*  
!1m7^3l7j  
f: 100 * n(x, 3),          ！n(x ,3) 函数是计算x位置处激活粒子数在能级3上的占比 Oz{FM6  
  yscale = 2, Dm{9;Abs%  
  color = red, 9u?[{h.`B  
  width = 3, ?COLjk  
  style = fdashed, #|j8vmfn$e  
  "n3 (%, right scale)" NdxPC~Z+  
\RT3#X+  
Dbl3ef  
; ------------- Wr+/9  
diagram 2:                    ！输出图表2 V*6
o|#  
3QhQpPk),  
"Variation ofthe Pump Power" GAP,$xAaW  
He9Er  
x: 0, 10 A'6-E{  
"pump inputpower (W)", @x (l+0*o,(  
y: 0, 10 QtHK`f>4#n  
y2: 0, 100 l~Hu#+O  
frame j82x$I*  
hx ^#gJf*'UE  
hy gT_tR_g  
legpos 150, 150 -JfqY?Ue_2  
N(J'h$E  
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 #
J'V,_wH  
  step = 5, ]xxE_B7  
  color = blue, PiIP%$72O  
  width = 3, Og-v][  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 O$ARk+  
  finish set_P_in(pump, P_pump_in) #;0F-pt  
.^xQtnq  
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 f = 'AI  
  yscale = 2, RF[Uy?es  
  step = 5, +[Izz~_p  
  color = magenta, (M#m BS  
  width = 3, 50e vWD  
  "population of level 2 (%, rightscale)", De ([fC  
  finish set_P_in(pump, P_pump_in) <:>[24LJ{  
oD3]2o/  
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 yZ-Ql11
 
  yscale = 2, eGW h]%  
  step = 5, $9@3dM*E?Z  
  color = red, &3Ry0?RET  
  width = 3, e}NB ,o  
  "population of level 3 (%, rightscale)", #Xk/<It  
  finish set_P_in(pump, P_pump_in) LFAefl\  
g;~$xXn  
2WS Wfh  
; ------------- Mtaky=l8~I  
diagram 3:                         ！输出图表3 SveP:uJA[  
>~O/ZDu/@  
"Variation ofthe Fiber Length" |JiN; O+K  
/Yj; '\3  
x: 0.1, 5 !{F\\D/  
"fiber length(m)", @x XnKf<|j6k  
y: 0, 10 " 1h~P,  
"opticalpowers (W)", @y )}J}
d)  
frame T"e"?JSRJ  
hx RF [81/w]  
hy 79uAsI2-Y  
ZEB,Q~  
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 Jq:Wt+a  
  step = 20,             TU1W!=Z  
  color = blue, [U,hb1Wi3  
  width = 3, 2;7n0LOs}  
  "signal output" ~ Ofn&[G  
a|ZJzuqo  
;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 G[+{[W  
   step = 20, color = red, width = 3,"residual pump" fskc'%x  
To;r#h  
! set_L(L_f) {restore the original fiber length } /tJ%gF  
/&em%/  
Z*Fn2I4  
; ------------- >CYz6G j  
diagram 4:                                  ！输出图表4 qgxGq(6K  
cS>xT cj  
"TransverseProfiles" ybc
Cq]cgt  
@=?#nB&  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) RijFN.s  
^V"
08  
x: 0, 1.4 * r_co /um +vYVx<uTQ  
"radialposition (µm)", @x 7Q|v5@;pU  
y: 0, 1.2 * I_max *cm^2 'DUYf5nF  
"intensity (W/ cm&sup2;)", @y ;It1i`!R  
y2: 0, 1.3 * N_Tm gb26Y!7%  
frame ;Ouu+#s  
hx ]YUst]gu3  
hy d z\yP v~  
xgIb4Y%  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 p@3 <{kLm  
  yscale = 2,  -K4uqUp  
  color = gray, lGEfI&1%!  
  width = 3, wx^1lC2  
  maxconnect = 1, ej[Y `N  
  "N_dop (right scale)" !Xzy
:  
mpzm6Ieu  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 {'o\#4Wk  
  color = red, <$8e;:#:  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 \O\veB8  
  width = 3, mSp;(oQ  
  "pump"  ?d
vcmXR  
{W
uUzq`  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 4x$Ts %]  
  color = blue, N lB%Qu  
  maxconnect = 1, wTn"  
  width = 3, mam(h{f$  
  "signal" +?Y(6$o  
b@[\+P] "  
'.zr:l  
; ------------- Gx-tPW}  
diagram 5:                                  ！输出图表5 ;CA7
\&L>  
I z)~h>-F  
"TransitionCross-sections" &Fl*
,  
T0BM:ofx  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) /pz(s+4=  
L)_L#]Yy  
x: 1450, 2050 Q46sPMH+_  
"wavelength(nm)", @x ]dHV^!  
y: 0, 0.6 D?P1\<A~  
"cross-sections(1e-24 m&sup2;)", @y zqb3<WP"  
frame ,8@U-7f,  
hx E"b"VB  
hy zbP#y~[  
3
o^oq  
f: s12_Tm(x * nm) /1e-24,      ！Tm³⁺吸收截面与波长的关系 3EX41)u  
  color = red, 0& ?/TSC  
  width = 3, TYgn X  
  "absorption" B#(2,j7M  
f: s21_Tm(x * nm) /1e-24,  ！Tm³⁺发射截面与波长的关系 J
/^|
Y6  
  color = blue, =#{i;CC%  
  width = 3, df!n.&\y!  
  "emission" SK {ALe  
Js!V,={iX  

感谢，视频上有点看不清楚