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

(* O4#zsr:"  
Demo for program"RP Fiber Power": thulium-doped fiber laser, mR{0*<  
pumped at 790 nm. Across-relaxation process allows for efficient A} "*`y  
population of theupper laser level. +pV3.VMH0  
*)            ！（*  *）注释语句 p;H1,E:Re#  
~cez+VQe  
diagram shown: 1,2,3,4,5  ！指定输出图表 \"*l:x-u  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 kOjq LA  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 W"0#  
; 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 E }yxF.  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 Rza\n8  
; 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 {P3,jY^  
f9rToH  
include"Units.inc"         ！读取“Units.inc”文件中内容 ML]?`qv '  
0O:TKgb&C.  
include"Tm-silicate.inc"    ！读取光谱数据 OGVhb>LO1  
W%wS+3Q/  
; Basic fiberparameters:    ！定义基本光纤参数 X >**M  
L_f := 4 { fiberlength }      ！光纤长度  z/ i3  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 Vz#cb5:g  
r_co := 6 um { coreradius }                ！纤芯半径 `#UTOYx4  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 =1,g#HS  
eu4x{NmQ  
; Parameters of thechannels:                ！定义光信道 |p+VitM7  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm o+vf  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 FD6|>G  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W PM|K*,3J  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um 8R z=)J  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 "-Ns1A8  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 IS!+J.2  
Y'Af I^K  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm #8RQ7|7b|  
w_s := 7 um                          ！信号光的半径 Zf"AqGP  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 9UwDa`^  
loss_s := 0                            ！信号光寄生损耗为0 qB&*"gf  
#"Zr#P{P  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 JrQN-e!  
s
2$R2,  
; Function for defining themodel:   ！定义模型函数，一定要有calc命令，否则函数只会被定义，但不会被执行 g&za/F  
calc Oo0$n]*;W  
  begin E8nqExQ  
    global allow all;                   ！声明全局变量 k-89(  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 RsY<j& f  
    add_ring(r_co, N_Tm);
-8o8lz  
    def_ionsystem();              ！光谱数据函数 x88$#N>Q5  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 0Icyi#N  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 +
]__zm/^  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 N7E[wOP  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 mA4v 4z  
    finish_fiber();                                   ,Bta)  
  end; mrJQB I+  
a@7we=!  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 &3JbAJ|;X  
show "Outputpowers:"                                   ！输出字符串Output powers： ~/NA?E
-c  
show"pump:     ", P_out(pump):d3:"W"  ！输出字符串pump：和计算值（格式为3个有效数字，单位W） Wb|IWnH$  
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） p$ko=fo-*_  
b+C>p2%  
)O}x&@
Q  
; ------------- ^GbyAYEp  
diagram 1:                   !输出图表1 $0 li"+  
DB*IVg  
"Powers vs.Position"          ！图表名称 $HH(8NoL  
&o8\ $A  
x: 0, L_f                      ！命令x: 定义x坐标范围 n8iN/Y<%U  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 WOwIJrP  
y: 0, 15                      ！命令y: 定义y坐标范围 5~sJ$5<,  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 XGUF9arN  
frame          ！frame改变坐标系的设置 fEpY3od  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） T.{I~_  
hx             ！平行于x方向网格 A$oYw(m
#  
hy              ！平行于y方向网格 N\vc<Zpn  
sz)3 z  
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 W<x2~HW(  
  color = red,  ！图形颜色 mxWaXb  
  width = 3,   ！width线条宽度 L7KHs'c*  
  "pump"       ！相应的文本字符串标签 R#r?<Ofw4  
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 <y!BO  
  color = blue,     jf})"fz-*  
  width = 3, -1< }_*  
  "fw signal" ~U^0z|.  
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 "'PDreS  
  color = blue, _2TIan}  
  style = fdashed, BBp
Hp  
  width = 3, eAl&[_o|S  
  "bw signal" @z2RMEC~  
H,uOshR  
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 #v`G
4d
 
  yscale = 2,            ！第二个y轴的缩放比例 NZD X93  
  color = magenta, p?!]sO1l  
  width = 3, *mBEF"  
  style = fdashed, beq)Frn^  
  "n2 (%, right scale)" Fc nR}TE  
]{y ';MZ  
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 8gx^e./  
  yscale = 2, #<?j784  
  color = red, ;hKn$' '  
  width = 3, e0hT  
  style = fdashed, ;`xu)08a  
  "n3 (%, right scale)" AQFx>:in  
}XAoMp  
ly{~X  
; ------------- xR%CS`0R  
diagram 2:                    ！输出图表2 yP"_j&ef7  
*{tJ3<t(1  
"Variation ofthe Pump Power" =g&0CFF<  
Nl(Aa5:!  
x: 0, 10 HDC`g  
"pump inputpower (W)", @x aEgzQono  
y: 0, 10 `yxk Sb  
y2: 0, 100 FS20OD  
frame ?49wq4L;a  
hx - BocWq\  
hy 7#<|``]zNf  
legpos 150, 150 zKI(yC  
CE?R/uNo{  
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 jsL'O;K/  
  step = 5, z~X]v["d  
  color = blue, SR\#>Qwx_  
  width = 3, .Oim7JQ8  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 FS']3uJ/  
  finish set_P_in(pump, P_pump_in) +]AE}UXZoh  
i1scoxX3\  
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 .2u%;)S
 
  yscale = 2, Qs4Jl;Y_  
  step = 5, yJgnw6>r2  
  color = magenta, 8Y4YE(x5  
  width = 3, [OMKk#vW  
  "population of level 2 (%, rightscale)", A]>0lB  
  finish set_P_in(pump, P_pump_in) bbnAF*7s8  
&18} u~M  
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
K;YK[M1!  
  yscale = 2, 4S9AXE6  
  step = 5, ] e&"CF  
  color = red, aeg5ij-]u@  
  width = 3, 5#iv[c  
  "population of level 3 (%, rightscale)", 9@^/ON\O  
  finish set_P_in(pump, P_pump_in) 0$
P40 7  
(D))?jnC  
^&.F!  
; ------------- (3_2h4O  
diagram 3:                         ！输出图表3 3J@#V '  
56L>tP  
"Variation ofthe Fiber Length"  EI+.Q  
4cs`R+]o  
x: 0.1, 5 eyy&JjVs  
"fiber length(m)", @x Kr8p:$D};  
y: 0, 10 vL-%"*>v  
"opticalpowers (W)", @y mWO=(}Fb\  
frame lZb1kq%9g  
hx Yr[1-Oy/k  
hy dmf~w_(7  
.*v8*8OJ&  
f: (set_L(x);P_out(signal_fw)),     ！改变光纤长度对信号光输出功率的影响 [=XsI]B\  
  step = 20,             3"q%-M|+Q  
  color = blue, 0xH$!?{b  
  width = 3,  #p\sw  
  "signal output" Inr ~9hz  
"WK.sBFz4  
;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 jb77uH_  
   step = 20, color = red, width = 3,"residual pump" Th@L68  
{KODwP'~  
! set_L(L_f) {restore the original fiber length } II),m8G  
?2Bp^3ytJ  
`qX'9e3VP+  
; ------------- ^2Op?J  
diagram 4:                                  ！输出图表4 LkJ3 :3O  
!a?o9<V  
"TransverseProfiles" As78yfK  
-6Cxz./#yS  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) 5$N4<Lo7  
-O-_F6p'D  
x: 0, 1.4 * r_co /um {T=I~#LjMI  
"radialposition (µm)", @x lHZf'P_Wx  
y: 0, 1.2 * I_max *cm^2
 V18w  
"intensity (W/ cm&sup2;)", @y tt#M4n@  
y2: 0, 1.3 * N_Tm T w/CJg  
frame ()XL}~I{!A  
hx UPLr[>Q#  
hy d4gl V`%.  
Z@j0J[s  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 {5_*tV<I  
  yscale = 2, Hn:%(Rg=aW  
  color = gray, CJ KFNa  
  width = 3, bCc^)o/w  
  maxconnect = 1, hX~IZ((Hi8  
  "N_dop (right scale)" B*,9{g0m/  
%vyjn
&13  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 R1A!ob  
  color = red, Dh J<\_;  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 e>"{nO
Y4  
  width = 3, hm?-QVRPV  
  "pump" ?I7%@x!+S  
yS lN|8d  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 k1B7uA'h"G  
  color = blue, Fy^!*M-  
  maxconnect = 1, BQt!L1))  
  width = 3, Kkdd}j
 
  "signal" Z#MPlw0B  
F|Jo|02  
Pp#!yMxBr  
; ------------- _ ?=bW  
diagram 5:                                  ！输出图表5 1+Ja4`o,iS  
Y~bp:FkS  
"TransitionCross-sections" wGAN"K:e  
[WC-EDO2lb  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) \)`\F
$CF  
0Tg/R4dI  
x: 1450, 2050 CP/`ON  
"wavelength(nm)", @x aCy2.Qn  
y: 0, 0.6 W<k) '|  
"cross-sections(1e-24 m&sup2;)", @y 8[ :FU  
frame ,,b_x@y*  
hx T?_$  
hy 3|g'1X}  
v"=^?5B  
f: s12_Tm(x * nm) /1e-24,      ！Tm<sup>3+</sup>吸收截面与波长的关系 r'k-*I  
  color = red, 1%EIP-z  
  width = 3, 's!EAqCN  
  "absorption" ) Q]kUG#`  
f: s21_Tm(x * nm) /1e-24,  ！Tm³⁺发射截面与波长的关系 &+JV\  
  color = blue, GS\-  
  width = 3, }JAg<qy}  
  "emission" S\s1}`pNm  
ub./U@1
 

感谢，视频上有点看不清楚