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

(* Tm 6<^5t  
Demo for program"RP Fiber Power": thulium-doped fiber laser, lo5,E(7~h  
pumped at 790 nm. Across-relaxation process allows for efficient GFB(c  
population of theupper laser level. %@Bl,!BJ,  
*)            ！（*  *）注释语句 )k&<D*5s  
mR)Xq=  
diagram shown: 1,2,3,4,5  ！指定输出图表 [2"a~o\  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 <-D>^p9  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 *0^!%Y'/4  
; 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 cQ} ,q+GR~  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 :<r.n "  
; 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 ~xerZQgc  
5hF iK K7  
include"Units.inc"         ！读取“Units.inc”文件中内容 4"nb>tA  
%wzDBsX  
include"Tm-silicate.inc"    ！读取光谱数据 SxI='z_S.f  
n6Je5fE  
; Basic fiberparameters:    ！定义基本光纤参数 `q@5d&d`j  
L_f := 4 { fiberlength }      ！光纤长度 {N42z0c  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 #N.W8mq  
r_co := 6 um { coreradius }                ！纤芯半径 D2z" Z@  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 gdPv,p19L  
O~?H\2S  
; Parameters of thechannels:                ！定义光信道 >4 4A  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm WhQK3hnm  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 hd0d gc  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W Xn@\p5<  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um SaceIV%(  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 {]BP
Sj{B  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 c5C 2xE}T  
jM]B\cvN  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm TwJiYXHw?  
w_s := 7 um                          ！信号光的半径
iI\bD  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 $a.fQ<,\X  
loss_s := 0                            ！信号光寄生损耗为0 ,j E'd'$  
}tJR
Bb  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 (cAWT,  
RdaAS{>Sk  
; 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 Hz~?"ts@;  
calc u5zL;C3O  
  begin Zq1ZrwPF  
    global allow all;                   ！声明全局变量 @`
t#Bi9  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 HEh,Cf7`'  
    add_ring(r_co, N_Tm); @D1}).  
    def_ionsystem();              ！光谱数据函数 goBl~fqy0  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 r&!Ebe-  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 u-qwG/$E  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 iXLODuI  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 l Oxz&m  
    finish_fiber();                                   ~C M%WvS  
  end; Uao8#<CkvJ  
$.HZz  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 rG[iEY  
show "Outputpowers:"                                   ！输出字符串Output powers： v3\ |  
show"pump:     ", P_out(pump):d3:"W"  ！输出字符串pump：和计算值（格式为3个有效数字，单位W） \"k[y+O],4  
show"signal:   ",P_out(signal_fw):d3:"W" ！输出字符串signal：和计算值（格式为3个有效数字，单位W） r:N =?X`N  
8k
[=$Ro  
?|,dHqh{nM  
; ------------- W3Gg<!*Uo  
diagram 1:                   !输出图表1 3QSA|  
q~:H>;:G-  
"Powers vs.Position"          ！图表名称 *ay&&S*  
OeMI  
x: 0, L_f                      ！命令x: 定义x坐标范围 @}K|/  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 O2;iY_P7lV  
y: 0, 15                      ！命令y: 定义y坐标范围 skaPC#u  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 )T0%<(J  
frame          ！frame改变坐标系的设置 +;#z"m]  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） D@W[Nd5MJ  
hx             ！平行于x方向网格 @~p
;.=1]F  
hy              ！平行于y方向网格 ??5y0I6+  
0c}pg:XT  
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 n1XJuc~  
  color = red,  ！图形颜色 #Sg< 9xsW  
  width = 3,   ！width线条宽度 9f=L'{  
  "pump"       ！相应的文本字符串标签 9!XXuMWU<  
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 p9X{E%A<:  
  color = blue,     <b.O^_zQF  
  width = 3, ~?6M4!u   
  "fw signal" ;r8< Ed
  
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 xxy (#j$  
  color = blue, P55Q
E+B  
  style = fdashed, S[zETRSG  
  width = 3, DjLSl,Z  
  "bw signal" )70i/%}7  
LC>bZ!(i#  
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 "5wer5? t  
  yscale = 2,            ！第二个y轴的缩放比例 2|a5xTzH  
  color = magenta, 2K:Rrn/cR  
  width = 3, 1`& Yg(  
  style = fdashed, ;9&#Sb/  
  "n2 (%, right scale)" `/"*_AKAI  
n=F|bW  
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 xcHuH-}  
  yscale = 2, L$zB^lSM  
  color = red, V|\dnVQ'-%  
  width = 3, QJ4=*tX)  
  style = fdashed, n9H4~[JiC  
  "n3 (%, right scale)" a>H8,a  
<sncW>?!~  
90Sp(  
; ------------- [`n)2} k  
diagram 2:                    ！输出图表2  j1~'[  
?9Hs,J  
"Variation ofthe Pump Power" P:OI]x4  
\cx==[&(  
x: 0, 10 p)e?0m26  
"pump inputpower (W)", @x ']&rPvkL  
y: 0, 10 <rn26Gfr  
y2: 0, 100 Spm0DqqR?  
frame h uIvXl  
hx lKSd]:3Xm  
hy bXNM.K  
legpos 150, 150 (3VV(18  
*
Y]()#?Gr  
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 i-FsA  
  step = 5, +1pY^#A  
  color = blue, I xk+y?  
  width = 3, \- f^C}m  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 h0z>dLA#2  
  finish set_P_in(pump, P_pump_in) $8{v_2C){  
ozOvpi:k3%  
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 uGz>AW8a3  
  yscale = 2, Oz1S*<]=,~  
  step = 5, @%b
&(x^UD  
  color = magenta, 7#[8td  
  width = 3, @b3jO  
  "population of level 2 (%, rightscale)", _`~\zzUZ  
  finish set_P_in(pump, P_pump_in) WNO!6*+  
e-EY]%JO  
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 ;r3Xh)k;  
  yscale = 2, a,ZmDkzuv  
  step = 5, #V-0-n,`  
  color = red, !v\_<8  
  width = 3, xgq `l#  
  "population of level 3 (%, rightscale)", \r`><d
 
  finish set_P_in(pump, P_pump_in) WlHK  
+i@{h9"6g  
I3hN7  
; ------------- y!u=]BE  
diagram 3:                         ！输出图表3 6F:<c  

lO/?e!$  
"Variation ofthe Fiber Length" (iJ9ekB  
htu(R$GSM  
x: 0.1, 5 ~\khwNA  
"fiber length(m)", @x E(-@F%Q  
y: 0, 10 c`O(||UZT  
"opticalpowers (W)", @y UlQS]
f~  
frame BI|YaZa+p  
hx
k];NTALOG  
hy FNR<=M  
TjY-C m  
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 k0@*Up3{7  
  step = 20,             LQz6o
p}R  
  color = blue, k1E(SXcW9  
  width = 3, M]7>Ar'zsG  
  "signal output" %DhM}f
 
<5E: ,<  
;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 .C\##
  
   step = 20, color = red, width = 3,"residual pump" /8Ru
O  
x%RG>),U  
! set_L(L_f) {restore the original fiber length } (~N[j;W,_W  
g:eqB&&  
C @nA*  
; ------------- @8eQ|.q]Q  
diagram 4:                                  ！输出图表4 #p7K2  
AlA:MO]NM  
"TransverseProfiles" +)ba9bJ|  
rsn^YC  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) 7CDp$7v2  
QWI)Y:<K/  
x: 0, 1.4 * r_co /um -*[:3%  
"radialposition (µm)", @x brEA-xNWQ  
y: 0, 1.2 * I_max *cm^2 svvl`|n%  
"intensity (W/ cm&sup2;)", @y *;:dJXR  
y2: 0, 1.3 * N_Tm zVvL!  
frame ac!!1lwA  
hx @0 #JY
:"  
hy GyF  
_b"K,[0o  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 tA8O(9OV  
  yscale = 2, R3|r`~@@  
  color = gray, g\]~H%2 ,  
  width = 3, 'YvRkWf:KC  
  maxconnect = 1, *CCh\+S7m  
  "N_dop (right scale)" v3b+Ddp  
H>]A|-rG#  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 
ps_q3Cyp  
  color = red, ]Ns)fr6  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 I
Xv9mr?H}  
  width = 3, Q.,2G7[ <  
  "pump" 2rxz<ck(  
p(!d,YSE  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 l
 i) 5o  
  color = blue, \b*z<Odv  
  maxconnect = 1, n7/>+V+  
  width = 3, x|$|~6f=n  
  "signal" "1Y'VpKm(~  
'81c>qA  
6d(D>a  
; ------------- ha?M[Vyw4Q  
diagram 5:                                  ！输出图表5 8Dkq+H93  
weH3\@  
"TransitionCross-sections" IictX"3lh  
l5/gM[0_7  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) N6HeZB":  
<q
&4Y+b  
x: 1450, 2050 #%g>^i={ky  
"wavelength(nm)", @x "0 $UnR  
y: 0, 0.6 DY\~O  
"cross-sections(1e-24 m&sup2;)", @y 8"}8Nrb0  
frame 0X:$ASocU  
hx [@_W-rA  
hy a}Z+"D  
E[cH/Rm  
f: s12_Tm(x * nm) /1e-24,      ！Tm³⁺吸收截面与波长的关系 m/3,;P.6  
  color = red, xqb*;TBh*  
  width = 3, SuXeUiK.[  
  "absorption" 8Si3 aq3  
f: s21_Tm(x * nm) /1e-24,  ！Tm³⁺发射截面与波长的关系 ;0l
Y_ii  
  color = blue, 20# V?hX3  
  width = 3, !/e*v>3u&  
  "emission" ;I?x;lH  
Xe&p.v  

感谢，视频上有点看不清楚