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

(* !wEz= i  
Demo for program"RP Fiber Power": thulium-doped fiber laser, 6^hCW`jG  
pumped at 790 nm. Across-relaxation process allows for efficient vo]$[Cp|4  
population of theupper laser level. vI+X9C?  
*)            ！（*  *）注释语句 U
:O&FE  
2)+ddel<Z  
diagram shown: 1,2,3,4,5  ！指定输出图表 H!uq5`j0K  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 '645Fr[lg  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 @hIHvLpRB  
; 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 g7<u eF  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 u75(\<{  
; 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 E|omC_h  
@N+6qO}  
include"Units.inc"         ！读取“Units.inc”文件中内容 5vqh09-FB  
Q%^!j_#  
include"Tm-silicate.inc"    ！读取光谱数据 J+0T8 ?A  
ttA0* >'  
; Basic fiberparameters:    ！定义基本光纤参数 ~ZZJ/Cu  
L_f := 4 { fiberlength }      ！光纤长度 )w&k&TY4H  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 YV/JZc f  
r_co := 6 um { coreradius }                ！纤芯半径 p& +w  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 lc\f6J>HT  
zFeo8S  
; Parameters of thechannels:                ！定义光信道 E|hW{oX3  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm &{H LYxh  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 ]R8JBnA  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W m<| *  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um B>,&{ah/5J  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 ?cD2EX%(  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 cuo'V*nWQ  
Jx4"~ 4  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm kESnlmy@J  
w_s := 7 um                          ！信号光的半径 O2C&XeB:4  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 Vrx3%_NkQ  
loss_s := 0                            ！信号光寄生损耗为0 4]%v%64U  
qQx5n  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 Z2hIoCT  
|sklY0?l(  
; 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 ?_Y2'O  
calc Ob>M]udn  
  begin Iji9N!Yx
 
    global allow all;                   ！声明全局变量 2C_/T8  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 7\sRf/  
    add_ring(r_co, N_Tm); "`8~qZ7k  
    def_ionsystem();              ！光谱数据函数 bO\E)%zp  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 e!JC5Al7  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 |\_d^U&`  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 bf1EMai"  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 OVgx2_F  
    finish_fiber();                                   w.6Gp;O  
  end;
RYem(%jq  
P{_Xg,Z  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 :bV1M5  
show "Outputpowers:"                                   ！输出字符串Output powers： [Uw/;Kyh  
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） ej&ZE n  
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） 9$oU6#U,h  
JVk"M=c  
dE0p>4F  
; ------------- 'k(aZ"  
diagram 1:                   !输出图表1 q]>m#yk   
rLzN#Zoi  
"Powers vs.Position"          ！图表名称 Eggdj+  
6e.?L  
x: 0, L_f                      ！命令x: 定义x坐标范围 {Mx3G*hr
 
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 ?,0 5!]  
y: 0, 15                      ！命令y: 定义y坐标范围 ZAcH`r*  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 [$[1|r *Q  
frame          ！frame改变坐标系的设置 +X&b  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） "o.g}Pv  
hx             ！平行于x方向网格 F1aI4H<(T  
hy              ！平行于y方向网格 ~i ImM|*0  
H^N 5yOj/  
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 S
LSbEm  
  color = red,  ！图形颜色 2AK]x`GY  
  width = 3,   ！width线条宽度 lyYi2& %  
  "pump"       ！相应的文本字符串标签 FG[YH5  
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 Yf=Puy}q  
  color = blue,     Q4vl  
  width = 3, }uaRS9d  
  "fw signal" !?u{2D  
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 mqFo`Ee  
  color = blue, l[D5JnWxt  
  style = fdashed, C
_~hX G  
  width = 3, +^\TG>le  
  "bw signal" 1<ic 5kB  
R<GnPN:c  
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 uO,9h0y0W  
  yscale = 2,            ！第二个y轴的缩放比例 jjLwHJ  
  color = magenta, $xl>YYEBMH  
  width = 3, cB ,l=/?  
  style = fdashed, [)E.T,fjMQ  
  "n2 (%, right scale)" 9< $n'g  
6~@S,i1  
f: 100 * n(x, 3),          ！n(x ,3) 函数是计算x位置处激活粒子数在能级3上的占比 vL,:Yn@b  
  yscale = 2, ^OWA   
  color = red, ,fa'  
  width = 3, [G/ti&Od^  
  style = fdashed, >.)m|,  
  "n3 (%, right scale)" ^[]@dk9  
>m-VBo  
CC<(V{Png  
; ------------- c{X:0man  
diagram 2:                    ！输出图表2 hhU: nw  
1'G&PX  
"Variation ofthe Pump Power" SZhW)0  
R rtr\a  
x: 0, 10 1"4Pan  
"pump inputpower (W)", @x 4%s6 d,6"  
y: 0, 10 ipThwp9  
y2: 0, 100 E9"P~ nz  
frame X*^^W_LH.  
hx g$N/pg2>cT  
hy N#Y|MfLc  
legpos 150, 150 WX9ABh&5  
dpPu&m+  
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 Tt.#O~2:9  
  step = 5, ;;#_[Zl  
  color = blue, +6$|No  
  width = 3, ~Gz b^  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 BM,]W
jfdj  
  finish set_P_in(pump, P_pump_in) aA|<W g  
p!OCF]r  
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 -szSA  
  yscale = 2, A./VO  
  step = 5, 'kC,pN{->  
  color = magenta, oieJ7\h]m  
  width = 3, z3bRV{{YqN  
  "population of level 2 (%, rightscale)", 2.>WR
~\  
  finish set_P_in(pump, P_pump_in) ~mR@L`"l  
l[AQyR1+/  
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 oE
H""Bd  
  yscale = 2, s6k@WT?"^  
  step = 5, 5(+PIKCjC  
  color = red, IOjp'6Yr  
  width = 3, 6Kbc:wlR  
  "population of level 3 (%, rightscale)", xRI7_8Jpyn  
  finish set_P_in(pump, P_pump_in) /~O>He  
Jx jP'8  
YcaomPo  
; ------------- UK7pQt}9  
diagram 3:                         ！输出图表3 hT0[O  
=1vl-*uYh  
"Variation ofthe Fiber Length" r
+D ?_Lk  

5uidi  
x: 0.1, 5 <?&Y_  
"fiber length(m)", @x Bo#,)%80  
y: 0, 10 2:6W_[7l!  
"opticalpowers (W)", @y QCD MRh n  
frame aW
CZ1F  
hx ;K$ !
c5  
hy D"z3SLFW{  
2d#3LnO  
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 ~\oF}7l$  
  step = 20,             nqFJNK]a  
  color = blue, +QZ}c@'r  
  width = 3, !2o1c  
  "signal output" "P
D^]m  
u{'|/g&  
;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 $0mR_pA\fW  
   step = 20, color = red, width = 3,"residual pump" $1E'0M`  
@,:6wKMc  
! set_L(L_f) {restore the original fiber length } Sk6B>O<:  
sy]hMGH:3W  
7G\a5  
; ------------- E xls_oSp  
diagram 4:                                  ！输出图表4 Hh1]\4D,4  
x<'<E@jpU;  
"TransverseProfiles" )z^NJ'v4(  
^cnTZzT#Q  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) kdP*{  
cp)BPg  
x: 0, 1.4 * r_co /um z%Eok  
"radialposition (µm)", @x ~z kzuh  
y: 0, 1.2 * I_max *cm^2 @"G+kLv0  
"intensity (W/ cm&sup2;)", @y ]i:_^z)R  
y2: 0, 1.3 * N_Tm MtD0e@  
frame VrIR!9%:  
hx 0#S#v2r5  
hy +Zg@X.z  
Iysp)  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 ;TC"n!ew  
  yscale = 2, "OO)m](w  
  color = gray, jl"su:y  
  width = 3, j2RdBoCt  
  maxconnect = 1, }|OwUdE!R9  
  "N_dop (right scale)" ,gdud[&|;  
:OFs"bC  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 :Dj0W8V  
  color = red,
,x=S)t  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 ~Jh1$O,9o  
  width = 3, L"tzUYxg  
  "pump" q"e]\Tb=we  
%xv*#.<Vj  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 ~JS B
Z@  
  color = blue, c[>xM3=e^q  
  maxconnect = 1, {ldt/dl~  
  width = 3, DS1{~_>nFu  
  "signal" 8Drz i!}  
agk
GUK/  
WS ^,@>A  
; ------------- kW7$Gw]-  
diagram 5:                                  ！输出图表5 .>a [  
NZ"nG<;5  
"TransitionCross-sections" mt]^d;E  
#\8"d  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) G1fC'6$3  
=<%[P9y  
x: 1450, 2050 aH?+^f"D  
"wavelength(nm)", @x +ag_w}  
y: 0, 0.6 aD+4uGN  
"cross-sections(1e-24 m&sup2;)", @y Yi j^hs@eV  
frame I.[Lv7U-  
hx v`@NwH<r  
hy Sh2BU3  
}P'c8$  
f: s12_Tm(x * nm) /1e-24,      ！Tm³⁺吸收截面与波长的关系 cLf<YF  
  color = red, hv`I`[/J  
  width = 3, 9:P\)'y?  
  "absorption" TwsI8X  
f: s21_Tm(x * nm) /1e-24,  ！Tm³⁺发射截面与波长的关系 P1R5}i  
  color = blue, I^Dm 3yz  
  width = 3, -wT!g;v;%  
  "emission" ?<` ;lu/eL  
nTl2F1(sV7  

感谢，视频上有点看不清楚