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

(* [szwPNQ_  
Demo for program"RP Fiber Power": thulium-doped fiber laser, A5nu`e9&  
pumped at 790 nm. Across-relaxation process allows for efficient =g&0CFF<  
population of theupper laser level. Nl(Aa5:!  
*)            ！（*  *）注释语句 V^f'4*~'  
H%/$Rqg  
diagram shown: 1,2,3,4,5  ！指定输出图表 `yxk Sb  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 B'=*92i>S  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 G&;W  
; 3:"Variation of the Fiber Length"！信号输出功率vs 光纤长度的变化，仿真最佳光纤长度 Y@pa+~[{h3  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 S4tdWA  
; 5:"Transition Cross-sections"    ！不同波长的跃迁横截面，横坐标波长，纵坐标为横截面 MLp5Y\8*  
6b)1B\p  
include"Units.inc"         ！读取“Units.inc”文件中内容 1~_]"Y'  
Et7AAV*8g  
include"Tm-silicate.inc"    ！读取光谱数据 !>! l=Z  
bb#w]!q  
; Basic fiberparameters:    ！定义基本光纤参数 lk+)-J-lj'  
L_f := 4 { fiberlength }      ！光纤长度 ))+R*k%  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 aUJ&  
r_co := 6 um { coreradius }                ！纤芯半径 b^%4_[uRu  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 )"q2DjfX*  
,;{m
H]"s  
; Parameters of thechannels:                ！定义光信道 @@! R Iq!  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm D@0eYX4s  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 .&L#%
C  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W sSvQatwS  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um WLizgVM  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 rb9x||  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 )ll}hGS  
#%x4^A9 q  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm lv{Qn~\y&  
w_s := 7 um                          ！信号光的半径 9}":}!  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 9m8`4%y=  
loss_s := 0                            ！信号光寄生损耗为0 ^D6JckW  
{)`5*sd  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 _tYt<oB~%  
?SS?I  
; Function for defining themodel:   ！定义模型函数，一定要有calc命令，否则函数只会被定义，但不会被执行 Vg2s~ce{  
calc |>p\*Dl}H  
  begin kR'!;}s  
    global allow all;                   ！声明全局变量 ZL-@2ZU{1  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 =:#$_qR  
    add_ring(r_co, N_Tm); o6svSS  
    def_ionsystem();              ！光谱数据函数 X, J.!:4`  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 =`{!" 6a  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 h
NP|  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 |~'{ [?a*  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 Oa*/jZjr  
    finish_fiber();                                   F!.@1Fi1  
  end; ncu> @K$n  
B9+oI cO  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 l&E-H@Pe  
show "Outputpowers:"                                   ！输出字符串Output powers： }!B<MGBd  
show"pump:     ", P_out(pump):d3:"W"  ！输出字符串pump：和计算值（格式为3个有效数字，单位W） 7+?  
show"signal:   ",P_out(signal_fw):d3:"W" ！输出字符串signal：和计算值（格式为3个有效数字，单位W） {KODwP'~  
II),m8G  
?2Bp^3ytJ  
; ------------- `qX'9e3VP+  
diagram 1:                   !输出图表1 )D(XDN  
IDcu#Nz
`  
"Powers vs.Position"          ！图表名称 %B#Ewt@[  
&oNy~l o  
x: 0, L_f                      ！命令x: 定义x坐标范围 u\>Ed
9^  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 '0w'||#1  
y: 0, 15                      ！命令y: 定义y坐标范围 r@wWGbQ|L  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 ]`+>{Sx 1  
frame          ！frame改变坐标系的设置 @{~x
:P5g  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） 3wa }p^   
hx             ！平行于x方向网格 Z\TH=UA  
hy              ！平行于y方向网格 |9}G  
3/4xP|  
f: P(pump, x),    ！命令f: 定义函数图；P(pump, x)函数是计算x位置处的泵浦光功率 d(R3![:  
  color = red,  ！图形颜色 =q>eoXp  
  width = 3,   ！width线条宽度 ~I2IgEj>]  
  "pump"       ！相应的文本字符串标签 C9({7[k^%  
f: P(signal_fw, x),  ！P(signal_fw ,x) 函数是计算x位置处的前向信号光功率 1G$kO90  
  color = blue,    
!%]]lxi  
  width = 3, !MQo=k  
  "fw signal" `}Q+:  
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 ~"{Kjr#R  
  color = blue, t5[{ihv~:  
  style = fdashed, YdIV_&-W  
  width = 3, ~pwp B2
c  
  "bw signal" jG8ihi  
R (4 :_ xc  
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 c5^i5de  
  yscale = 2,            ！第二个y轴的缩放比例 BL,YJM(y  
  color = magenta, [+>$'Du  
  width = 3, \y#gh95  
  style = fdashed,
R6CxNPRJ  
  "n2 (%, right scale)" 8tLkJOu  
yn4Xi@9Pri  
f: 100 * n(x, 3),          ！n(x ,3) 函数是计算x位置处激活粒子数在能级3上的占比 p4|:u[:&  
  yscale = 2, P}JA"V&  
  color = red, Y{um1
)k  
  width = 3, >.QD:_@:  
  style = fdashed, Ca]vK'(  
  "n3 (%, right scale)" }fL8<HM\'c  
F5{~2~Cw(  
"5ah{,  
; ------------- Z}$.Tm  
diagram 2:                    ！输出图表2 D",ZrwyJ  
Cz m`5  
"Variation ofthe Pump Power" ]r6,^"  
n%@xnB$ZX  
x: 0, 10 }Geip@Ot  
"pump inputpower (W)", @x "k5 C?~  
y: 0, 10 *#dXW\8qu  
y2: 0, 100 HI)ks~E/  
frame u!X[xe;  
hx _9""3O  
hy y}
nM'$p  
legpos 150, 150 (m~MyT#S  
] E`J5o}op  
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 ,7k)cNstW  
  step = 5, X-6Se  
  color = blue, rsy'ZVLUj  
  width = 3, + ECV|mkk  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 a'XCT@B  
  finish set_P_in(pump, P_pump_in) Y |n_Ro^~  
]:Ocu--  
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 :n{rVn}G  
  yscale = 2, FHqa|4Ie  
  step = 5, q1`uS^3`  
  color = magenta, jpT!di  
  width = 3, b]Oc6zR,,~  
  "population of level 2 (%, rightscale)", Fu!:8Wp!(  
  finish set_P_in(pump, P_pump_in) 5{[3I|m{  
Vr`UF0_3q  
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 hFyN|Dqhds  
  yscale = 2, @N1ta-D#  
  step = 5, 9{?<.%  
  color = red, NS mo(c>5  
  width = 3, c{s<W}3Ds  
  "population of level 3 (%, rightscale)", * vEG%Y  
  finish set_P_in(pump, P_pump_in) kVe}_[{m  
o!wz:|\S  
a(BWV?A  
; ------------- ^~eT#Y8  
diagram 3:                         ！输出图表3 ,N5Rdgzk  
{b7P1}>-*  
"Variation ofthe Fiber Length" Et# }XVCJ  
JwxI8Pi*y  
x: 0.1, 5 C7eaioW$  
"fiber length(m)", @x Pg|q{
fc  
y: 0, 10 x
.>z2.  
"opticalpowers (W)", @y rL&585  
frame >2Z:=HT  
hx L'z;*N3D  
hy *M6M'>Tin  
?)5}v4b  
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 q
yQPR  
  step = 20,             W~Eq_J?I  
  color = blue, |o|0qG@g  
  width = 3, 64hr|v  
  "signal output" :q0C$xF  
V92e#AR  
;f: (set_L(x);P_out(pump)),                     ！改变光纤长度对泵浦信号输出功率的影响 T->O5t c  
   step = 20, color = red, width = 3,"residual pump" !>  
6TlkPM$~2  
! set_L(L_f) {restore the original fiber length } 3[-L'!pOX3  
d+[hB4!l2  
nke[}Hqf  
; ------------- ~Se/uL;*  
diagram 4:                                  ！输出图表4 F~)xZN3=  
)TVyRYZ1  
"TransverseProfiles" >eWHPO  
SI8mr`gJ  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) ]C}z3hhk  
\7jcZ~FBX%  
x: 0, 1.4 * r_co /um i,$*+2Z  
"radialposition (µm)", @x f)?s.DvUB  
y: 0, 1.2 * I_max *cm^2 "((6)U#  
"intensity (W/ cm&sup2;)", @y GriL< =?t  
y2: 0, 1.3 * N_Tm : R.,<DQM  
frame /J wQ5  
hx )u(`s`zd  
hy e9o(hL  
6 @'v6 1'  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 Cf@WjgR  
  yscale = 2, oT_k"]~Q~2  
  color = gray, L+9a4/q  
  width = 3, *-ZJF6  
  maxconnect = 1, ~~&8I!r e  
  "N_dop (right scale)" cuW$%$F  
`?2S4lN/  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 G'#a&6  
  color = red, xud =(HLl  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 s)8g
4Yc*  
  width = 3, _u]Wr%D@  
  "pump" "qMd%RP  
u=p([ 5]  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 sj0Hv d9  
  color = blue, {LrezE4  
  maxconnect = 1, u2@:[:Ao  
  width = 3, Ycn*aR2  
  "signal" xpRQ"6  
6psK2d
0  
Jd7+~isu~  
; ------------- BQ2DQ7
q  
diagram 5:                                  ！输出图表5 q: ?6  
nH/V2>Lm  
"TransitionCross-sections" zxT&K|  
D-69/3PvP  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) [8l8m6  
= 0
Z}s  
x: 1450, 2050 yI)~-
E.  
"wavelength(nm)", @x BJB'o  
y: 0, 0.6 @'7'3+ c  
"cross-sections(1e-24 m&sup2;)", @y (wo.OH  
frame 3l-8TR  
hx 6zaO$  
hy '>@evrG  
")i4w{_y  
f: s12_Tm(x * nm) /1e-24,      ！Tm³⁺吸收截面与波长的关系 7??+8T#n*  
  color = red, _r?H by<b  
  width = 3, L|u\3.:  
  "absorption" LW{7|g  
f: s21_Tm(x * nm) /1e-24,  ！Tm³⁺发射截面与波长的关系 BwEO2a{  
  color = blue, ?WKFDL'_0j  
  width = 3, Gh>Rt=Qu%  
  "emission"  wC}anq>>  
eYOwdTrq  

感谢，视频上有点看不清楚