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

(* fu]N""~  
Demo for program"RP Fiber Power": thulium-doped fiber laser, <kbyZXV@K  
pumped at 790 nm. Across-relaxation process allows for efficient :E'P7A  
population of theupper laser level. 3n48%
5  
*)            ！（*  *）注释语句 ~xDw*AC-  
|[1D$Qv  
diagram shown: 1,2,3,4,5  ！指定输出图表 5<+KR.W
 
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 /!T> b:0  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 O3qM1-k}S  
; 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 4l @)K9F  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 LchnBtjn  
; 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 B42sb_  
LM"y\q ]  
include"Units.inc"         ！读取“Units.inc”文件中内容 $$1qF"GF  
#/ "+  
include"Tm-silicate.inc"    ！读取光谱数据 qSD9Pue  
79BaDB`{a  
; Basic fiberparameters:    ！定义基本光纤参数 BX< dSK  
L_f := 4 { fiberlength }      ！光纤长度 o#D.9K(  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 yPgmg@G@/  
r_co := 6 um { coreradius }                ！纤芯半径 XG 0v  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 T):SGW  
`ifiL   
; Parameters of thechannels:                ！定义光信道 y%cO#P@  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm x0Z5zV9  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦  }roG(  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W e@n!x}t8  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um %*
W<vu>H  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 <Q5Le dN  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 J4aBPq`  
gEJi[E@  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm @i%YNI5*  
w_s := 7 um                          ！信号光的半径 M+xdHBg  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 ;3m!:l  
loss_s := 0                            ！信号光寄生损耗为0 thW<   
;[$n=VX`  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 m,_d^  
t"AzI8O  
; Function for defining themodel:   ！定义模型函数，一定要有calc命令，否则函数只会被定义，但不会被执行 ga0'zo9K  
calc I021p5h|  
  begin Q-eCHr)  
    global allow all;                   ！声明全局变量 !; v~^#M]~  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 c&'JmKV>&  
    add_ring(r_co, N_Tm); <J{'o`{  
    def_ionsystem();              ！光谱数据函数 (@sp/:`6  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 5VE2@Fn}  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道
aT!;{+  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 6Bt=^~d  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 |$+5@+Zz  
    finish_fiber();                                   yR71%]*.  
  end; |m G7XL,  
P0GeZ02]  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 vO@s$qi  
show "Outputpowers:"                                   ！输出字符串Output powers： Q^_/By@  
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） KL?)akk  
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） {}Ejt:rKN  
U4,2br>  
olYsT**'  
; ------------- d"Q |I
  
diagram 1:                   !输出图表1 Bl;KOR  
z2yJ#  
"Powers vs.Position"          ！图表名称 /Cr/RG:OX  
s8gU7pT49  
x: 0, L_f                      ！命令x: 定义x坐标范围 'mMjjG9  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 "ZMkL)'7-  
y: 0, 15                      ！命令y: 定义y坐标范围 s(2GFc  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 5g ;ac~g  
frame          ！frame改变坐标系的设置 (lH,JX`$a  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） %$ceJ`%1e  
hx             ！平行于x方向网格 8cWZ"v  
hy              ！平行于y方向网格 UlovXb  
!?FK We  
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 7C,T&g 1:  
  color = red,  ！图形颜色 v."Dnl  
  width = 3,   ！width线条宽度 >'=MH2;  
  "pump"       ！相应的文本字符串标签 9w4sSj`  
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 -_^c6!i  
  color = blue,     ;</Lf=+Vm  
  width = 3, XhW %,/<  
  "fw signal" )j&"%[2F  
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 RDQ^dui
  
  color = blue, 3Rv7Qx  
  style = fdashed, lE#m]D  
  width = 3, #`SD$;  
  "bw signal" mDMt5(. 
 
j|(Z#3J  
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 w YNloU  
  yscale = 2,            ！第二个y轴的缩放比例 'c`jyn  
  color = magenta, (Xxn\*S  
  width = 3,
1yqoA*  
  style = fdashed, L/r@ S'  
  "n2 (%, right scale)" }At{'8*n  
+|RB0}hFS-  
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 {I1~-8  
  yscale = 2, .0y%5wz8j  
  color = red, 3
smM,fi  
  width = 3, t}p@:'  
  style = fdashed, +C{p%`<  
  "n3 (%, right scale)" 6LUC!Sh  
`sHuM*  
I4_d[O9  
; ------------- LLAa1Wq  
diagram 2:                    ！输出图表2 -pb&-@Hul  
}ZOFYu0f  
"Variation ofthe Pump Power" ^CT&0  
_7)F ?  
x: 0, 10 i8pU|VpA  
"pump inputpower (W)", @x '3(l-nPiG^  
y: 0, 10 )M<vAUF  
y2: 0, 100 U]4pA#*{|  
frame rP=sG;d  
hx JiS5um=(.  
hy \}]iS C.2  
legpos 150, 150 j .A6S`  
|$lwkC)O  
f: (set_P_in(pump, x);P_out(signal_fw)), ！set_P_in(pump,x)改变泵浦信道功率；P_out(signal_fw)输出前向信号光 yubSj*  
  step = 5, d
j9?t  
  color = blue, t!;/Z6\Pb  
  width = 3, Yxd X#3  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 f
|7u_
f  
  finish set_P_in(pump, P_pump_in) }-<zWI{p  
IO$z%r7  
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 # '|'r+  
  yscale = 2, hsLzj\)6  
  step = 5, !b|'Vp^U  
  color = magenta, QDmYSY$  
  width = 3, T3&`<%,f  
  "population of level 2 (%, rightscale)", _!V%fw  
  finish set_P_in(pump, P_pump_in) f^Bc  
E_ucab-Fi  
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 R!x: C!{  
  yscale = 2, q 2?X"!  
  step = 5, t2{~bzq1X  
  color = red, ~[PKcEX  
  width = 3, T6#"8qz<  
  "population of level 3 (%, rightscale)", )hKS0`$|  
  finish set_P_in(pump, P_pump_in) |BU+:+
 
k)(Biz398E  
2s ,8R  
; ------------- uZ6d35MJ  
diagram 3:                         ！输出图表3 :Og:v#r8=  
*<V^2z$y_  
"Variation ofthe Fiber Length" e&It   
kUHE\
L.Y]  
x: 0.1, 5 ``Q2P%  
"fiber length(m)", @x ,5k-.Md>2*  
y: 0, 10 M~T.n)x2  
"opticalpowers (W)", @y cd@.zg'sYn  
frame q`|CrOzO  
hx P1zK2sL_  
hy 8Z#j7)G  
vxlOh.a|/L  
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 ;.
"<m   
  step = 20,             wOgE|n
 
  color = blue, %kI} [6J_  
  width = 3, oUDVy_k  
  "signal output" @)YY\l#  
^+70<#Xc  
;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 (il0M=M  
   step = 20, color = red, width = 3,"residual pump" qztV,R T  
y7u^zH6wj  
! set_L(L_f) {restore the original fiber length } EN
h8kD l5  
Eh8Pwt7C@  
,8Iv9M}2  
; ------------- 5CYo7mJ6+  
diagram 4:                                  ！输出图表4 N"5fmY<  
/ l>.mK()  
"TransverseProfiles" j}HFs0<L  
8pZ<9t'  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) Y0uvT7+[hi  
d 4{FDqto  
x: 0, 1.4 * r_co /um eBW=^B"y+  
"radialposition (µm)", @x m$Y :0_^-  
y: 0, 1.2 * I_max *cm^2 yOXO)u1n  
"intensity (W/ cm&sup2;)", @y aC=['a>)  
y2: 0, 1.3 * N_Tm FY0%XW  
frame Q%ad q-B  
hx Xh3;  
hy !F4;_A`X  
|cbd6e{!  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 oh8L`=>&a  
  yscale = 2, OmMX$YID  
  color = gray, {5Lj8N5  
  width = 3, gvavs+H%  
  maxconnect = 1, E$\~lcq  
  "N_dop (right scale)" $< %B#axL  
EYzg%\HH  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 :> -1'HC  
  color = red, Ggm` ~fS  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 >wON\N0V_  
  width = 3, |w&~g9   
  "pump" xh9qg0d  
fZryG  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 3!9Z=-tD  
  color = blue, %HuyK  
  maxconnect = 1, |^n3{m  
  width = 3, j+ ::y) $  
  "signal" pK_?}~  
_2Py\+$  
d.F)9h]XHO  
; ------------- 'Z!Ga.I  
diagram 5:                                  ！输出图表5 7qIB7_K5  
 $g8}^1  
"TransitionCross-sections" m\0cE1fir  
H'g?llh1J  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) >9K//co"of  
S'i;xL>  
x: 1450, 2050 4*H"Z(HP  
"wavelength(nm)", @x rz
Ld"`  
y: 0, 0.6 zQ)+/e(8  
"cross-sections(1e-24 m&sup2;)", @y I}
0_nge  
frame i?}>.$j  
hx Iin#Wd-/  
hy ur%$aX)  
[Eq<":)  
f: s12_Tm(x * nm) /1e-24,      ！Tm<sup>3+</sup>吸收截面与波长的关系 Q
JX/7RA  
  color = red, p]|LV)R n  
  width = 3, {[OwMk  
  "absorption" ? Nj)6_&  
f: s21_Tm(x * nm) /1e-24,  ！Tm<sup>3+</sup>发射截面与波长的关系 #gZ|T M/h  
  color = blue, M@7Xp)S"  
  width = 3, pA4 ,@O  
  "emission" &w\I<J`T  
 -;c  

感谢，视频上有点看不清楚