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小火龙果 2020-05-28 16:28

RP Fiber Power仿真设计掺铥光纤激光器代码详解

(* hchG\ i  
Demo for program"RP Fiber Power": thulium-doped fiber laser, m#8 PX$_  
pumped at 790 nm. Across-relaxation process allows for efficient LOi}\O8  
population of theupper laser level. 8aWEl%  
*)            ！（*  *）注释语句 Kf BT'6t  
(oX!D(OI  
diagram shown: 1,2,3,4,5  ！指定输出图表 /QyKXg6)l  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 egG<"e*W}N  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 EI 35&7(  
; 3:"Variation of the Fiber Length"！信号输出功率vs 光纤长度的变化，仿真最佳光纤长度 #L+:MA7H  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 u)<s*jk  
; 5:"Transition Cross-sections"    ！不同波长的跃迁横截面，横坐标波长，纵坐标为横截面 RfTGTz@H  
9!uiQ  
include"Units.inc"         ！读取“Units.inc”文件中内容 PgK7CG7G  
_7;:*'>a4  
include"Tm-silicate.inc"    ！读取光谱数据 p+V#86(3  
@ G)yz!H  
; Basic fiberparameters:    ！定义基本光纤参数 gHstdp_3  
L_f := 4 { fiberlength }      ！光纤长度 \*e\MOp6  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 Px=@Tw N,  
r_co := 6 um { coreradius }                ！纤芯半径 Q7XOO3<):  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 ,n8\y9{G  
xxu  
; Parameters of thechannels:                ！定义光信道 (XVBH 1p"  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm ]$lt  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 vsj4? 0=  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W f2;.He  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um w(6n  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 *|dr-e_j  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 y')OmR2h  
E(PBV  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm s4"Os gP+  
w_s := 7 um                          ！信号光的半径 WrGnLE kiV  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 _&#{cCo:  
loss_s := 0                            ！信号光寄生损耗为0 qt~=47<d  
H TOr  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 ~bhS$*t64  
*$<W"@%^J  
; 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 'V]&X.=zC  
calc rR#Ditn^  
  begin A<X?1$  
    global allow all;                   ！声明全局变量 Eu`|8# [ W  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 lQ;BI~  
    add_ring(r_co, N_Tm); 6UeYZ g  
    def_ionsystem();              ！光谱数据函数 RPW46l34  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 8#7qHT;cx  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 FzJ7 OE |  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 K] (*l"'U5  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 gQ>kDl^$Ls  
    finish_fiber();                                   ! ;t\lgMl  
  end; IFp%T a  
X@\W* nq  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 W#p7M[  
show "Outputpowers:"                                   ！输出字符串Output powers： hF,|()E[  
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） i3,IEN  
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） \#_ymM0  
P0n1I7|  
9 %T??-  
; ------------- Dw%'u'HG  
diagram 1:                   !输出图表1 by/H:5}7  
-!j6&  
"Powers vs.Position"          ！图表名称 i41~-?Bc  
cKt=?  
x: 0, L_f                      ！命令x: 定义x坐标范围 $eYL|?P50h  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 G](4!G&  
y: 0, 15                      ！命令y: 定义y坐标范围 $^ws#}j  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 K*>%,mP$i  
frame          ！frame改变坐标系的设置 t*gZcw5 r  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） t}YcB`q)  
hx             ！平行于x方向网格 <.6rl  
hy              ！平行于y方向网格 Ek_5% n  
l-+=Yk!X  
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 C`[<6>&y  
  color = red,  ！图形颜色 {o}U"b<+Ra  
  width = 3,   ！width线条宽度 p0Jr{hM  
  "pump"       ！相应的文本字符串标签 Q/+`9z+c  
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 Jb QK$[z"  
  color = blue,     dHc\M|HCC  
  width = 3, v'W{+>.  
  "fw signal" IfK~~XYG  
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 7Y5r3a}%  
  color = blue, Y![Q1D!  
  style = fdashed, 9TW[;P2> )  
  width = 3, zjpZ] $  
  "bw signal" 3p0v  
x b,XI/  
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 QyD0WC}i  
  yscale = 2,            ！第二个y轴的缩放比例 {&=+lr_h?  
  color = magenta, V`Cy x^P  
  width = 3, Q^(CqQo!<  
  style = fdashed, 8xPt1Sotq[  
  "n2 (%, right scale)" 4q}+8F`0F  
2J7|y\N,  
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 !5`MiH  
  yscale = 2, h  d3  
  color = red, :o s8"  
  width = 3, B9maz"lJ  
  style = fdashed, ~g{j)"1  
  "n3 (%, right scale)" ;c!> =  
PG&t~4QM`  
nip6|dN  
; ------------- 5,"c1[`-  
diagram 2:                    ！输出图表2 #e' >9T  
Rx-\B$G  
"Variation ofthe Pump Power" [G<ga80  
fVbjU1N  
x: 0, 10 #Rw!a#CX.  
"pump inputpower (W)", @x wQhNQ(H~\  
y: 0, 10 R#T-o,m  
y2: 0, 100 ;b<w'A_1  
frame TSB2]uH  
hx &jE\D^>ko  
hy d?zSwLsl  
legpos 150, 150 Coi[cfg0  
Bqf(6\)F  
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 V]7/hN-Y}  
  step = 5, Ku(YTXtK  
  color = blue, `YNzcn0x  
  width = 3, G+zhL6]F  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 19E(Hsz  
  finish set_P_in(pump, P_pump_in) `3;EJDEdbi  
}Fe6L;^;  
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 F&d!fEHU  
  yscale = 2, w!F>fcm  
  step = 5, =:H-9  
  color = magenta, X +`Dg::  
  width = 3, 5vx 4F f  
  "population of level 2 (%, rightscale)", I,-n[k\J  
  finish set_P_in(pump, P_pump_in) 'S`l[L:.8  
hA7=:LG  
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 6S`_L  
  yscale = 2, V*vQNPe y  
  step = 5, x[0T$  
  color = red, `16'qc  
  width = 3, ] K$YtM^  
  "population of level 3 (%, rightscale)", )lG}B U.  
  finish set_P_in(pump, P_pump_in) Z/Rp?Jz\j/  
pN9!  
y ``\^F  
; ------------- ynI e4b  
diagram 3:                         ！输出图表3 JW>k8QjyN  
qc8Ge\3s  
"Variation ofthe Fiber Length" jSI1tW8  
};Q}C0E  
x: 0.1, 5 csP4Oq\g[  
"fiber length(m)", @x q/s-".%P  
y: 0, 10 7`|'Om?'  
"opticalpowers (W)", @y  u r$  
frame dxeiN#(XT  
hx \e86'&  
hy WtOjPW  
U0&myj 8L  
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 VVJ0?G (?  
  step = 20,             lp`j3)  
  color = blue, iOiF kka  
  width = 3, "Bd-h|J  
  "signal output" 6 H|SiO9  
"f91YX_)  
;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 9z(SOzZn  
   step = 20, color = red, width = 3,"residual pump" Cl0kR3Y  
d{fd5jv;  
! set_L(L_f) {restore the original fiber length } 72nZ`u  
<*5S7)]BP  
[2@:jLth=  
; ------------- ZF7n]LgSc&  
diagram 4:                                  ！输出图表4 F_@B ` ,  
x6cG'3&T  
"TransverseProfiles" }qWnn>h9xv  
FGVw=G{r  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) $}/tlA&e  
c.>f,vtcn  
x: 0, 1.4 * r_co /um  [N,+mX  
"radialposition (µm)", @x #9GfMxH  
y: 0, 1.2 * I_max *cm^2 8a6.77c  
"intensity (W/ cm&sup2;)", @y SdnnXEB7  
y2: 0, 1.3 * N_Tm vu( 5s  
frame }3lG'Y#Kpy  
hx ag'hHFV  
hy u!X~!h-6~  
Kbu>U{'  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 & AK\Pw)  
  yscale = 2, }83 8F&  
  color = gray, ? dJd7+A  
  width = 3, "`M~=RiI  
  maxconnect = 1, c/ Pql!h+  
  "N_dop (right scale)" `:&RB4Z  
:Wbp|:N0  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 ^\PRz Y  
  color = red, L&6^(Bn   
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 4U dk#  
  width = 3, !Q\*a-C  
  "pump" ZX/FIxpy  
;Z*rY?v  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 A;8kC}  
  color = blue, 5WI bnV@  
  maxconnect = 1, /Xi21W/  
  width = 3, / =9Y(v  
  "signal" #?)6^uTW  
;bwBd:Y  
y A5h^I  
; ------------- & %/p; ::A  
diagram 5:                                  ！输出图表5 g;Ugr8  
syu/"KY^!  
"TransitionCross-sections" M"*NV(".g  
WWSycH ?[  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) /)[-5n{  
qt9jZtx  
x: 1450, 2050 "6C a{n1hk  
"wavelength(nm)", @x R+.4|1p  
y: 0, 0.6 +mjwX?yF  
"cross-sections(1e-24 m&sup2;)", @y PxYK)n9&  
frame xY?p(>(  
hx g7323m1=  
hy 6"iNh)  
C9+rrc@4  
f: s12_Tm(x * nm) /1e-24,      ！Tm3+吸收截面与波长的关系 +788aK,{#  
  color = red, .4]XR/I$  
  width = 3, #_^ p~:  
  "absorption" <yl@!-'J7  
f: s21_Tm(x * nm) /1e-24,  ！Tm3+发射截面与波长的关系 Y nnK]N;\x  
  color = blue, |8E~C~d  
  width = 3, ?5't1219  
  "emission" 8(j]=n6 r  
ItLR|LO9  
lileisgsz 2021-09-28 09:47
感谢，视频上有点看不清楚
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