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

(* gJBw6'Z  
Demo for program"RP Fiber Power": thulium-doped fiber laser, jT=fq'RK  
pumped at 790 nm. Across-relaxation process allows for efficient ^2C \--=;  
population of theupper laser level. R1vuf*A5,  
*)            ！（*  *）注释语句 H[2W(q6  
.OcI.1H[  
diagram shown: 1,2,3,4,5  ！指定输出图表 $|m'~AmI  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 4@r76
v}{  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 .s-*aoj  
; 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 {R8)DK  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 Z;~7L*|  
; 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 \=uD)9V  
OF/hD2V  
include"Units.inc"         ！读取“Units.inc”文件中内容 +$$5Cv5#<&  
+vt?3i\^.  
include"Tm-silicate.inc"    ！读取光谱数据 N$N7aE$  
9";qR,  
; Basic fiberparameters:    ！定义基本光纤参数 pv8vW'G\E  
L_f := 4 { fiberlength }      ！光纤长度 oy\U\#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 ]w_JbFmT  
r_co := 6 um { coreradius }                ！纤芯半径 H5Bh?mw2  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 yb6gYN  
%l[]n;
*$  
; Parameters of thechannels:                ！定义光信道 c2Wp 8l  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm "7J38Ej\  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 -% \LW1  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W ,!dVhG#  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um x%W%  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 -QK-w>  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 Ug )eyu  
4s6,`-  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm S!66t?vHB  
w_s := 7 um                          ！信号光的半径  kMZo7 y  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 5,J.$Sax  
loss_s := 0                            ！信号光寄生损耗为0 uCoy~kt292  
YI>9C 76L  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 \aN7[>R.Q  
t:"%d9
]  
; Function for defining themodel:   ！定义模型函数，一定要有calc命令，否则函数只会被定义，但不会被执行 35JVF*z  
calc dU-nE5  
  begin RFPcH8-u7  
    global allow all;                   ！声明全局变量 Qs ysy  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 DE+k'8\T  
    add_ring(r_co, N_Tm); qOv`&%txW  
    def_ionsystem();              ！光谱数据函数 Y`."=8R~  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 X?o6=)SC|  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 G > t  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 mt~E&Z(A  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 
.
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    finish_fiber();                                   PD~vq^@Q  
  end; wLzV#8>  
86);0EBX  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 =IKgi-l*  
show "Outputpowers:"                                   ！输出字符串Output powers： />wE[`  
show"pump:     ", P_out(pump):d3:"W"  ！输出字符串pump：和计算值（格式为3个有效数字，单位W） .FN 6/N\  
show"signal:   ",P_out(signal_fw):d3:"W" ！输出字符串signal：和计算值（格式为3个有效数字，单位W） =]S,p7*7  
+8Y|kC{9"  
.03Rp5+v  
; ------------- &?}A/(#  
diagram 1:                   !输出图表1 5O;D\M{>  
my0
iE:  
"Powers vs.Position"          ！图表名称 nok-![  
@}2EEo#  
x: 0, L_f                      ！命令x: 定义x坐标范围 >pp#>{}  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 v#EFklOP  
y: 0, 15                      ！命令y: 定义y坐标范围 OZA^L;#>  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 E 02Y,C  
frame          ！frame改变坐标系的设置 f!H/X%F  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） %|j8#09  
hx             ！平行于x方向网格 KcUR /o5K  
hy              ！平行于y方向网格 %=$Knc_!T^  
vqZBDQ0  
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 n5z|@I`S_  
  color = red,  ！图形颜色 q\-P/aN_  
  width = 3,   ！width线条宽度 =K_&@|f+B  
  "pump"       ！相应的文本字符串标签 Wt=\hixj-  
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 G;d3.ml/aZ  
  color = blue,     FmhAUe  
  width = 3, $ w+.-Tr  
  "fw signal"
@1xIph<z  
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 t1G__5wp  
  color = blue, =k>fW7e  
  style = fdashed, YrYmPSb=  
  width = 3, `sDLxgwI  
  "bw signal" =dsEt\ j  
iXq*EZb"R  
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 OL%}C*Zq  
  yscale = 2,            ！第二个y轴的缩放比例 MiR$N  
  color = magenta, wWSo+40  
  width = 3, ns*:mGh  
  style = fdashed, 3 qJ00A
  
  "n2 (%, right scale)" 81C;D`!K  
@biU@[D  
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 9aNOfs8(  
  yscale = 2, Ql%B=vgKL  
  color = red, {> <1K6t  
  width = 3, K|l}+:k  
  style = fdashed, }+Q4s]  
  "n3 (%, right scale)" J_fs}Y1q\  
(z8;J>7  
JU.!<  
; ------------- ; O(Ml}z  
diagram 2:                    ！输出图表2 uE
<8L(*B  
\<\H1;=.@'  
"Variation ofthe Pump Power" 'MBXk2?b  
a 9{:ot8,  
x: 0, 10 8};kNW^2m  
"pump inputpower (W)", @x =<7z :]  
y: 0, 10  wlsx|  
y2: 0, 100 seRf q&  
frame cy)-Rf
g  
hx lSlZ^.&  
hy QqRF?%7q"q  
legpos 150, 150 I$p1^8~L  
0kNKt(_  
f: (set_P_in(pump, x);P_out(signal_fw)), ！set_P_in(pump,x)改变泵浦信道功率；P_out(signal_fw)输出前向信号光 ck%YEMs  
  step = 5, M@P%k`6C  
  color = blue,
^yqRa&  
  width = 3, !h|,wq]k  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 MBU|<tc  
  finish set_P_in(pump, P_pump_in) @x!,iT  
_x1W\#  
f: (set_P_in(pump,x); 100 * n_av(2)),   ！改变泵浦信号功率对能级2上激活粒子占比的影响 qp/1tC`  
  yscale = 2, bJ2>@|3*  
  step = 5, vz>9jw:Y  
  color = magenta, c;Tp_e@  
  width = 3, U\B9Ab  
  "population of level 2 (%, rightscale)", 9
(OeH7  
  finish set_P_in(pump, P_pump_in) ]jC{o,?s  
HfgTc h  
f: (set_P_in(pump,x); 100 * n_av(3)),   ！改变泵浦信号功率对能级3上激活粒子占比的影响 ot[ZFF\  
  yscale = 2, |JF,n~n  
  step = 5, /]'&cD 1  
  color = red, J(@" 7RX  
  width = 3, qg=`=]j  
  "population of level 3 (%, rightscale)", 2oV6#!{Z  
  finish set_P_in(pump, P_pump_in) 1^*ogMe  
J]XLWAM  
TWGn:mi  
; ------------- iE HWD.u  
diagram 3:                         ！输出图表3 w8R7Ksn(  
C?>d$G8  
"Variation ofthe Fiber Length" =0
]K(p,  
yP"}(!~m
 
x: 0.1, 5 axph]o@ y@  
"fiber length(m)", @x G4*&9Wo  
y: 0, 10 8s2y!pn7Q  
"opticalpowers (W)", @y r7g@(K  
frame NK/y,f6  
hx LKp;sV  
hy #n{4f1TZ  
Anu:  
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 6vAZ
LNG3  
  step = 20,             9aLd!PuTN  
  color = blue, ar\|D\0V  
  width = 3, =pi,]m  
  "signal output" )Sb-e(sl  
`ovMfL.u  
;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 2 G2+oS ?  
   step = 20, color = red, width = 3,"residual pump" jT$J~MpHh  
p7-\a1P3  
! set_L(L_f) {restore the original fiber length } 3IQI={:k|D  
xWXLk )A  
%a WRXW@c  
; ------------- <=GZm}/]N  
diagram 4:                                  ！输出图表4 1uN;JN `_  
.=Oww  
"TransverseProfiles" {[tmz;C  
X>yDj]*4P  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) ukEJD3i  
/7\q#qIm:  
x: 0, 1.4 * r_co /um 035jU'  
"radialposition (µm)", @x -K?lhu  
y: 0, 1.2 * I_max *cm^2 oF>`>  
"intensity (W/ cm&sup2;)", @y ,'HjL:r  
y2: 0, 1.3 * N_Tm qhvT,"  
frame B E8
_.>  
hx WwTl|wgvyI  
hy HQ9tvSc  
EK=0oy[  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 '_
4apyq|  
  yscale = 2, F7O*%y.';  
  color = gray, 8)?&eE'  
  width = 3, CF','gPnc  
  maxconnect = 1, G4:\6fu  
  "N_dop (right scale)" 3%(r,AD  
%n9ukc~$p  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 !ITM:%  
  color = red, 1c#\CO1l  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 4hxP`!<  
  width = 3, )'f=!'X  
  "pump" ejyx[CF  

Hy\q{  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 (nq""kO6'  
  color = blue, s<#BxN  
  maxconnect = 1, G\MeJSt*  
  width = 3, tjRwbnT"  
  "signal" ElpZzGj+  
%La7);SeY  
%G2g @2  
; ------------- $t^Td
<  
diagram 5:                                  ！输出图表5 TA/hj>rV  
H $Az,-P  
"TransitionCross-sections" *5oQZ".vA*  
e#k rr  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) 2HBey  
3bezYk  
x: 1450, 2050 @]#[TbNo  
"wavelength(nm)", @x !y~nsy:&7x  
y: 0, 0.6 OET/4(C  
"cross-sections(1e-24 m&sup2;)", @y qF$y p>|#  
frame ^_\m@
 
hx /D^ g
"  
hy F%$q]J[  
tlD^"eq4:  
f: s12_Tm(x * nm) /1e-24,      ！Tm³⁺吸收截面与波长的关系 NY<qoV  
  color = red, t^KQv~  
  width = 3, FO[ s;dmzu  
  "absorption" oKGF'y?A>  
f: s21_Tm(x * nm) /1e-24,  ！Tm³⁺发射截面与波长的关系 @.a59kP8X  
  color = blue, *rw6?u9I  
  width = 3, c-&Q_lB  
  "emission" ,7s+-sRG  
Tim/7*vx  

感谢，视频上有点看不清楚