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

(* &(X-b"2  
Demo for program"RP Fiber Power": thulium-doped fiber laser,
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pumped at 790 nm. Across-relaxation process allows for efficient WaDdZIz4  
population of theupper laser level. UNescZ  
*)            ！（*  *）注释语句 ^s3SzB@  
7,D6RP(b  
diagram shown: 1,2,3,4,5  ！指定输出图表 [G}l;  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 0(az80 p  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 .^FdO$"  
; 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 v?#W/].C+  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 K2oyHw<mk  
; 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 5tu 4uYp;  
/U,;]^  
include"Units.inc"         ！读取“Units.inc”文件中内容 wb (quu  
%1PNP<3r0  
include"Tm-silicate.inc"    ！读取光谱数据 `BKV/Xl  
J*r%b+  
; Basic fiberparameters:    ！定义基本光纤参数 ,mvU`>Ry  
L_f := 4 { fiberlength }      ！光纤长度  ood,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 F*/J`l  
r_co := 6 um { coreradius }                ！纤芯半径 wD`jks  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 drf?7
%v  
5>"X?U}He  
; Parameters of thechannels:                ！定义光信道 P4dhP-t  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm De:| T8&  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 ~_hn{Ous  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W ~BD 80s:f  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um Jhr3[A  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 \6c8Lqa  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 ~"#[<d  
GUdVsZjz(  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm .l u
fE  
w_s := 7 um                          ！信号光的半径 C:@JL
ZB  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 ,7w[r<7  
loss_s := 0                            ！信号光寄生损耗为0 4l
pkq  
t73" d#+  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 -_"6jU  
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; 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 4 .d~u@=  
calc 0l>4Umxr{J  
  begin )l"py9
STF  
    global allow all;                   ！声明全局变量 w>Y!5RnO  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 NE2P "mY  
    add_ring(r_co, N_Tm); d{G*1l(X  
    def_ionsystem();              ！光谱数据函数 M*lCoJ  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 <vUhJgN2/  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 "jMSF@lr  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 ;ax%H @o  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 `78)|a*R.  
    finish_fiber();                                   kB $?A8Olu  
  end; ! 4{T<s;q  
3"y,UtKGa  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 ]B3\IT  
show "Outputpowers:"                                   ！输出字符串Output powers： N@r`+(_t  
show"pump:     ", P_out(pump):d3:"W"  ！输出字符串pump：和计算值（格式为3个有效数字，单位W） aX{i   
show"signal:   ",P_out(signal_fw):d3:"W" ！输出字符串signal：和计算值（格式为3个有效数字，单位W） s\A4y "  
P\2UIAPa\b  
T?V!%AqY:  
; ------------- Rt2<F-gY  
diagram 1:                   !输出图表1 9L9+zs3k  
T+U,?2nF:  
"Powers vs.Position"          ！图表名称 '\I!RAZ  
f15f)P  
x: 0, L_f                      ！命令x: 定义x坐标范围 q}0xQjpo  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 K \_JG$(9  
y: 0, 15                      ！命令y: 定义y坐标范围 (nLT8{>0  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 >* >}d%  
frame          ！frame改变坐标系的设置 "-aCF  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） 65||]
l  
hx             ！平行于x方向网格 6A,-?W'\  
hy              ！平行于y方向网格 + tza]r:  
g;G]Xi.B}  
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 pZaOd;t  
  color = red,  ！图形颜色 U+wfq%Fz  
  width = 3,   ！width线条宽度 Qy_! +q  
  "pump"       ！相应的文本字符串标签 P!K;`4Ika  
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 ?'I pR  
  color = blue,     bfl%yGkd/|  
  width = 3, #<EMG|&(  
  "fw signal" N497"H</  
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 deVbNg8gs  
  color = blue, C.Ty\@U  
  style = fdashed, i_M0P12  
  width = 3, %6eQ;Rp*  
  "bw signal" t0-)\kXcA  
rI.CCPY~s
 
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 >y{oC5S  
  yscale = 2,            ！第二个y轴的缩放比例 N^;rLrm*  
  color = magenta, y|(C L^(  
  width = 3, Tj v)jD  
  style = fdashed, k2Y *  
  "n2 (%, right scale)" UK!PMkX  
cH>3|B*y  
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 T(2*P5%&  
  yscale = 2, '&42E[0P  
  color = red, ?f'iS#XL  
  width = 3, {RPZq2Tpc  
  style = fdashed, 0AWOdd>.  
  "n3 (%, right scale)" Kp)H>~cL  
ywj'S7~A  
t+<?$I[  
; ------------- 4<(U/58a*  
diagram 2:                    ！输出图表2 d:SLyFD$q  
;r.0=Uo9]  
"Variation ofthe Pump Power" NGq@x%T  
bHf>EU  
x: 0, 10 S?K x:]  
"pump inputpower (W)", @x |w3b!  
y: 0, 10 }I>h<O  
y2: 0, 100 $9}jU#Z|hd  
frame lZ>j:/R8^&  
hx Wi%e9r{hU  
hy 6#za\[  
legpos 150, 150 -gK*&n~  
Iq["(!7E5  
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 @r=v*hu  
  step = 5, <2,NWn.  
  color = blue, |Ta-D++]'  
  width = 3, ,!7\?=G6}v  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 !)-)*T  
  finish set_P_in(pump, P_pump_in) UZJ<|
[  
uZhY)o*]@  
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 :HW\awv  
  yscale = 2, J_eu(d[9  
  step = 5, yi&6HNb  
  color = magenta, 3<R8_p  
  width = 3, +]dh`8*8>1  
  "population of level 2 (%, rightscale)", vzH"O=  
  finish set_P_in(pump, P_pump_in) A\:u5(  
]21`x  
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 lV M)'m  
  yscale = 2, VAnP3:  
  step = 5, f@7HVv&  
  color = red, o>i@2_r\&H  
  width = 3, unD.t  
  "population of level 3 (%, rightscale)", Y6:b  
  finish set_P_in(pump, P_pump_in) +L U.QI'  
Xt9vTCox  
Sk7sxy<F'  
; ------------- gUWW}*\ U  
diagram 3:                         ！输出图表3 tQWjNP~  
\S]` { kY,  
"Variation ofthe Fiber Length" ]
=*G[  
H9%[! RF  
x: 0.1, 5 *F;W 1TF  
"fiber length(m)", @x R>T9 H0  
y: 0, 10 !))!!{  
"opticalpowers (W)", @y U ljWBd  
frame 1G<S'd+N  
hx Vf#g~IOI  
hy aExt TE  
4H*M^?h\#  
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 ,,=VF(@G  
  step = 20,             B]#^&89wG)  
  color = blue,
7#+>1 "\  
  width = 3, ?XllPnuKt%  
  "signal output" iBh.&K{j  
{!>'# F^e  
;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 ^@HWw@GA  
   step = 20, color = red, width = 3,"residual pump" *4OB 8
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\__xTL\  
! set_L(L_f) {restore the original fiber length } iiLDl  
6`WI S4  
?M BOd9  
; ------------- Plj>+XRO  
diagram 4:                                  ！输出图表4 X4CiVV  
noZ!j>f{@l  
"TransverseProfiles" Mb:>  
}uiD8b{I  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) kca
#ssN  
I3;03X<2  
x: 0, 1.4 * r_co /um P!u0_6  
"radialposition (µm)", @x S{jm4LZ  
y: 0, 1.2 * I_max *cm^2 'l $ViNq;  
"intensity (W/ cm&sup2;)", @y $EG9V++b3  
y2: 0, 1.3 * N_Tm WP5Vev9*+  
frame aNUMF  
hx 5;@2SY7,  
hy I(uM`g  
hdDL92JVg  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 Hq aay  
  yscale = 2, xV"~?vD  
  color = gray, {sW>J0  
  width = 3, -unQ4G  
  maxconnect = 1, sL)7MtNwy  
  "N_dop (right scale)" }CM#
jN?(  
[L=M=;{4  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 nQ@<[KNd  
  color = red, q{l %k  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 #'4Psz  
  width = 3, sspGB>h8l  
  "pump" MDCwgNPiQW  
Ys]cJ]  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 fyEXnmB;  
  color = blue, S;j"@'gz9  
  maxconnect = 1, %gu|  
  width = 3, qRL45[ K  
  "signal" |]eWO#vs  
]JQ}9"p=5  
NAX`y2z  
; ------------- DfX~}km  
diagram 5:                                  ！输出图表5 }b^x#HC  
i,2eoM)FB  
"TransitionCross-sections" nh? JiH {  
K!(hj '0.  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) 7c83g2|%   
VNwOD-b/]  
x: 1450, 2050 70{B/ ($  
"wavelength(nm)", @x vr4{|5M  
y: 0, 0.6 d^8n  
"cross-sections(1e-24 m&sup2;)", @y :xk+`` T  
frame ko"xR%Q  
hx S8O,{  
hy @w(X}q1  
=1\mLI}@  
f: s12_Tm(x * nm) /1e-24,      ！Tm³⁺吸收截面与波长的关系 xy4P_  
  color = red, v oO7W"  
  width = 3, N%9?8X[5  
  "absorption" Y*sw;2Z;a  
f: s21_Tm(x * nm) /1e-24,  ！Tm³⁺发射截面与波长的关系 erOj(ce  
  color = blue, ccT <UIpq  
  width = 3, .:O($9^Ho  
  "emission" [-Xah]g  

:mhO/Bx  

感谢，视频上有点看不清楚