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

(* 'w_Qs~6~{  
Demo for program"RP Fiber Power": thulium-doped fiber laser, 1c4:'0  
pumped at 790 nm. Across-relaxation process allows for efficient ne=C
N!=  
population of theupper laser level. O?iLLfs  
*)            ！（*  *）注释语句 c>wne\(5H  
[vxHsY3z  
diagram shown: 1,2,3,4,5  ！指定输出图表 KuMH,rXF  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 \Z-Fu=8J8^  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 2W;2._  
; 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 1}OM"V  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 B9]bv]  
; 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 P3TM5  
6Z{(.'Be  
include"Units.inc"         ！读取“Units.inc”文件中内容 %t]{C06w+{  
ZN!<!"~  
include"Tm-silicate.inc"    ！读取光谱数据 !'a <Dw5  
ym2"D?P (  
; Basic fiberparameters:    ！定义基本光纤参数 0Q[;{}W}  
L_f := 4 { fiberlength }      ！光纤长度 ]qiX"<s>~C  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 d/\ajQ1::  
r_co := 6 um { coreradius }                ！纤芯半径 BVS SO's  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 FPu$Nd&\  
X5=I{eY}  
; Parameters of thechannels:                ！定义光信道 p,7?rI\N  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm h79~d%-  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 .L.9e#?3  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W }bnodb^.7  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um /b410NP5  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 -f"{%<Q  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 1tlqw  
@GF3g=  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm d1 lxz?r  
w_s := 7 um                          ！信号光的半径 @%r"7%tq>  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 Fm+V_.H/;  
loss_s := 0                            ！信号光寄生损耗为0 ,?w
xW  
=0SJf 3  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 m1M6N`f  
>".@;  
; 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 L),bPfz  
calc M0%nGpVj>  
  begin &5QvUn
  
    global allow all;                   ！声明全局变量 KIY9?B=+  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 Q|G|5X  
    add_ring(r_co, N_Tm); /`j2%
8^N  
    def_ionsystem();              ！光谱数据函数 _.SpU`>/f  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 lz_ r  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 c!mMH~#  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 :)%cL8Nz]$  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 kR{$&cE^  
    finish_fiber();                                   Q<(aU{  
  end; $dug"[  
j3j^cO[8v  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 =
]1g*~%  
show "Outputpowers:"                                   ！输出字符串Output powers： JY3!jt
v
 
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） WZ UeW*#=  
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#s_pW{op  
18]Q4s8E  
6rlvSdB  
; ------------- GK#D R/OM  
diagram 1:                   !输出图表1 ypx`!2Q$  
$9Gra#  
"Powers vs.Position"          ！图表名称 "+hU
t  
)M8@|~~  
x: 0, L_f                      ！命令x: 定义x坐标范围 {~#d_!(  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 D!i|KI/  
y: 0, 15                      ！命令y: 定义y坐标范围 f4vdJ5pV  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 "tu*(>'~5  
frame          ！frame改变坐标系的设置 5[~C!t;  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） Sp]ov:]%f  
hx             ！平行于x方向网格 ::@JL  
hy              ！平行于y方向网格 #z}0]GJKj  
!e('T@^u6u  
f: P(pump, x),    ！命令f: 定义函数图；P(pump, x)函数是计算x位置处的泵浦光功率 /9| 2uw`  
  color = red,  ！图形颜色 S(lqj6aa}  
  width = 3,   ！width线条宽度 -?Cu-'  
  "pump"       ！相应的文本字符串标签 R S] N%`]  
f: P(signal_fw, x),  ！P(signal_fw ,x) 函数是计算x位置处的前向信号光功率 kRH D{6mol  
  color = blue,     qipS`:TER  
  width = 3, !. :b}t  
  "fw signal" 3M>y.MS  
f: P(signal_bw, x),   ！P(signal_bw ,x) 函数是计算x位置处的后向信号光功率 ACF_;4%&  
  color = blue, pE$*[IvQ'  
  style = fdashed, 1U ='"  
  width = 3, y|3!E>Up  
  "bw signal" ^[v>B@p*{  
}MtORqK  
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 #*3 vE& p  
  yscale = 2,            ！第二个y轴的缩放比例 ,QLy}=N  
  color = magenta, jEK{47i v  
  width = 3, /K_*Drk>  
  style = fdashed, ;XXEvRk  
  "n2 (%, right scale)" Vc+~yh.)  
@9\E  
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 ZL9|/ PY  
  yscale = 2, N8X)/W  
  color = red, 4ZB]n,pfT  
  width = 3, Kc+9n%sp  
  style = fdashed, 8an_s%,AW  
  "n3 (%, right scale)" {(h!JeQ  
{7Kl#b  
Htep
3Ol3  
; ------------- lLEEre  
diagram 2:                    ！输出图表2 +:u &]  
mOb@w/f  
"Variation ofthe Pump Power" f1U:_V^d  
Apkb!"}>  
x: 0, 10 dCzS f4:  
"pump inputpower (W)", @x jjg&C9w T  
y: 0, 10 ,Uy~O(Ft  
y2: 0, 100 =HMuAUa.  
frame ca%XA|_J  
hx o^u}(wZ{  
hy c32"$g  
legpos 150, 150 M$3/jl*#}  
)F6p+i="  
f: (set_P_in(pump, x);P_out(signal_fw)), ！set_P_in(pump,x)改变泵浦信道功率；P_out(signal_fw)输出前向信号光 (
dym*_J  
  step = 5, 8,:lw3x1  
  color = blue, V
C^QCuSq  
  width = 3, IOl0=+p  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 A$TFa:O|  
  finish set_P_in(pump, P_pump_in) mQ\oR|  
yRz l}  
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 Ljk0K3Q6>  
  yscale = 2, 4rD&Lg'  
  step = 5, ~Yg+bwh  
  color = magenta, _Fjax  
  width = 3, GGFrV8  
  "population of level 2 (%, rightscale)", kb'l@d#E  
  finish set_P_in(pump, P_pump_in) lsVg'k/Z!  
V}Pv}j:;  
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 ^1XnnQa  
  yscale = 2, ^0/!:*?  
  step = 5, 6Q`7>l.|?  
  color = red, g]._J  
  width = 3, &tw{d DD6  
  "population of level 3 (%, rightscale)", ['I5(M@  
  finish set_P_in(pump, P_pump_in) 7gt%[r M  
&I/C^/F&  
N ^H H&~V  
; ------------- YTfMYH=}  
diagram 3:                         ！输出图表3 j7C&&G q  
smX&B,&@  
"Variation ofthe Fiber Length" f
Jn4'Q*U  
z!^3%kJJ>  
x: 0.1, 5 EyV6uk~  
"fiber length(m)", @x |LE*R@|3$  
y: 0, 10 u2l`% F`x  
"opticalpowers (W)", @y ] -G~  
frame QC+BEN$  
hx 5R O_)G<  
hy 6Ou[t6  
nAyyjd3!S  
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 +4K'KpFzZ  
  step = 20,             Y^,G} &p  
  color = blue, Q_A?p$%;L  
  width = 3, >8DZj&j  
  "signal output" M\=/i\-  
xx,|n  
;f: (set_L(x);P_out(pump)),                     ！改变光纤长度对泵浦信号输出功率的影响 1$uO%  
   step = 20, color = red, width = 3,"residual pump" 7XiR)jYo*  
wU5= '  
! set_L(L_f) {restore the original fiber length } u]t#Vf-$u  
N#
vV;
 
9jrlB0  
; ------------- 4+au6ABy  
diagram 4:                                  ！输出图表4 $-_@MT~  
)>WSuf j  
"TransverseProfiles" q6V\n:hKV  
OyTp^W`&  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) YXTd^M~@D  

yv.(Oy  
x: 0, 1.4 * r_co /um 4:qM'z  
"radialposition (µm)", @x c+]5[6  
y: 0, 1.2 * I_max *cm^2 *7!*kqg!u  
"intensity (W/ cm&sup2;)", @y F0+@FS0  
y2: 0, 1.3 * N_Tm _6MNEoy?  
frame I$1~;!
<  
hx wTu=v  
hy > 0NDlS%Q:  
Rs1JCP=d8  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 m-}6DN  
  yscale = 2, r!O4]j_3  
  color = gray, 8J+:5b_?  
  width = 3, *qL"&h5W  
  maxconnect = 1, (khMjFOg  
  "N_dop (right scale)" "pkn  
~(d#T|ez  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 di#:KW  
  color = red, Ih5F\eM  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 <}^l MBa  
  width = 3, YDo,9  
  "pump" 4Awl  
<!.Q
n Y  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 ='GY:.N  
  color = blue, e=EM07z  
  maxconnect = 1, &io*pmUm6  
  width = 3, hS:j$je  
  "signal" he1W22  
99..]  
%^66(n)  
; ------------- mRC6m K>  
diagram 5:                                  ！输出图表5 ,daZKxT  
P :D6w){  
"TransitionCross-sections" <bxp/#6D  
334tg'2]  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) 9x9~u8j
 
!Typ_Cs  
x: 1450, 2050 XveG#oyiU  
"wavelength(nm)", @x %y}l^P5z  
y: 0, 0.6 Qg4g(0E@  
"cross-sections(1e-24 m&sup2;)", @y 8t Ef>  
frame ]R  s  
hx (3M7RpsL@  
hy q<*UeyE S  
by%k*y  
f: s12_Tm(x * nm) /1e-24,      ！Tm<sup>3+</sup>吸收截面与波长的关系 ^\zf8kPti  
  color = red, 60&4?<lR4  
  width = 3, ~J,e^$u  
  "absorption" .|9o`mF7  
f: s21_Tm(x * nm) /1e-24,  ！Tm³⁺发射截面与波长的关系 >@NGX-gp  
  color = blue, 8q#Be1u<s2  
  width = 3, {!rpE7P-  
  "emission" vx8-~Oq{|;  
a)GT\1q  

感谢，视频上有点看不清楚