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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

(* #!p=P<4M  
Demo for program"RP Fiber Power": thulium-doped fiber laser, ?]gZg[  
pumped at 790 nm. Across-relaxation process allows for efficient 0P`wh=")  
population of theupper laser level. Li ,B,   
*)            !(*  *)注释语句 =jD[A>3I  
h"VQFqQy  
diagram shown: 1,2,3,4,5  !指定输出图表 0 eZfHW&  
; 1: "Powersvs. Position"     !分号是注释;光纤长度对功率的影响 R`=3lY;  
; 2:"Variation of the Pump Power"  !泵浦光功率变化对信号输出功率的影响 K%LDOVE8e  
; 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 xw: v|(  
; 4:"Transverse Profiles"             !横向分布,横坐标为半径位置 Hv%(9)-8  
; 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 CCKg,v  
ja$>>5<q  
include"Units.inc"         !读取“Units.inc”文件中内容 ?7-#iC`  
~45u a  
include"Tm-silicate.inc"    !读取光谱数据 :1u>T3L.z  
7SzY0})<U  
; Basic fiberparameters:    !定义基本光纤参数 N_<sCRd]9  
L_f := 4 { fiberlength }      !光纤长度 bb;fV  
No_z_steps := 50 {no steps along the fiber } !光纤步长,大括号{ }是注释,相当于备注 )gdv!  
r_co := 6 um { coreradius }                !纤芯半径 8)/i\=N3;  
N_Tm := 100e24 { Tmdoping concentration }  !纤芯Tm离子掺杂浓度 WrbDB-uM  
oR}ir  
; Parameters of thechannels:                !定义光信道 AIsM:sV]  
l_p := 790 nm {pump wavelength }                !泵浦光波长790nm +C7 1".i-  
dir_p := forward {pump direction (forward or backward) }   !前向泵浦 Pg[zRRf<  
P_pump_in := 5 {input pump power }                    !输入泵浦功率5W b3b 4'l   
w_p := 50 um {radius of pump cladding }               !包层泵浦相应的半径 50um 5_Yv>tx  
I_p(r) := (r <=w_p) { pump intensity profile }          !泵浦光强度分布 6h>8^l  
loss_p := 0 {parasitic losses of pump wave }           !泵浦光寄生损耗为0 THH rGvb  
<[C 9F1]Ya  
l_s := 1940 nm {signal wavelength }                   !信号光波长1940nm kF'^!Hp  
w_s := 7 um                          !信号光的半径 R#~}ZUk2  
I_s(r) := exp(-2 *(r / w_s)^2)            !信号光的高斯强度分布 vZ 4Z+;.  
loss_s := 0                            !信号光寄生损耗为0 c 5P52_@  
VL5kjF3/  
R_oc := 0.70 {output coupler reflectivity (right side) }      !输出耦合反射率 )DMu`cD  
, >Y. !  
; 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 (PGmA>BT  
calc `.;7O27A^%  
  begin LoHWkNZ5:  
    global allow all;                   !声明全局变量 a#H=dIj  
    set_fiber(L_f, No_z_steps, '');        !光纤参数 [e)81yZG>  
    add_ring(r_co, N_Tm); Wy#`*h,  
    def_ionsystem();              !光谱数据函数 r0G#BPgdR  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  !泵浦光信道 Af=%5%  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      !前向信号光信道 q" wi.&|  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    !后向信号光信道 MSeO#X  
    set_R(signal_fw, 1, R_oc);                                 !设置反射率函数 t^?8Di\  
    finish_fiber();                                   EC1q#;:  
  end; y:4Sw#M%(  
N-^\X3X  
; Display someoutputs in the Output window (on the right side): !在Output aera区域显示输出 g|<)J-`Q  
show "Outputpowers:"                                   !输出字符串Output powers: CkoPno  
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) 7tAWPSwf  
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) ~ p; <H  
dQM# -t4*  
4:r^6m%%  
; ------------- |U nTd$m  
diagram 1:                   !输出图表1 +azPpGZ=  
+^YV>;  
"Powers vs.Position"          !图表名称 ?Z4& j'z<  
OpxVy _5,  
x: 0, L_f                      !命令x: 定义x坐标范围 3+A 0O%0*  
"position infiber (m)", @x      !x轴标签;@x 指示这些字符串沿坐标轴放置 x|0Q\<mEe  
y: 0, 15                      !命令y: 定义y坐标范围 6(9Ta'ywZ  
y2: 0, 100                    !命令y2: 定义第二个y坐标范围 d\;M F  
frame          !frame改变坐标系的设置 rShi"Yw  
legpos 600, 500  !图行在图表窗口中的位置(相对于左上角而言) ("/*k  
hx             !平行于x方向网格 !P@u4FCs  
hy              !平行于y方向网格 vzi=[A  
 QN_5q5  
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 @<vDR">  
  color = red,  !图形颜色 ^%_B'X9  
  width = 3,   !width线条宽度 ^e@c Ozt  
  "pump"       !相应的文本字符串标签 R5]R pW=G  
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 lG# &Pv>-  
  color = blue,     Byldt  
  width = 3, q 4 Ye  
  "fw signal" 4n3QW%#  
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 )\mklM9Z  
  color = blue, um ,/^2A  
  style = fdashed, hph 3kfR  
  width = 3, pvmm" f  
  "bw signal" ]?``*{Zqy  
l^$:R~gS  
f: 100 * n(x, 2),    !n(x ,2) 函数是计算x位置处激活粒子数在能级2上的占比 q<c).4  
  yscale = 2,            !第二个y轴的缩放比例 7h&xfrSrD  
  color = magenta, Br#]FB|tD  
  width = 3, Slv}6at5  
  style = fdashed, hNx`=D9[7  
  "n2 (%, right scale)" *otJtEI>6  
8w2+t>?  
f: 100 * n(x, 3),          !n(x ,3) 函数是计算x位置处激活粒子数在能级3上的占比 &}T`[ d_Z  
  yscale = 2,  EVq<gGy  
  color = red, S NK+U"Q  
  width = 3, WDzov9ot  
  style = fdashed, 44%::Oh  
  "n3 (%, right scale)" <R3S{ ty  
)%^oR5W  
`n^jU92  
; ------------- a*SJHBB  
diagram 2:                    !输出图表2 *[.\ S3K`  
[j93Mp  
"Variation ofthe Pump Power" 6bb=;  
8 6L&u:o:  
x: 0, 10 _^a.kF  
"pump inputpower (W)", @x :~T:&;q0  
y: 0, 10 W:5m8aE\  
y2: 0, 100 kJDMIh|g  
frame ;U20g:K  
hx gVG :z_6  
hy Opjt? ]  
legpos 150, 150 <EBp X   
.f jM9G#  
f: (set_P_in(pump, x);P_out(signal_fw)), !set_P_in(pump,x)改变泵浦信道功率;P_out(signal_fw)输出前向信号光 }1 _gemlf  
  step = 5, i(c2NPbX  
  color = blue, MH !CzV&  
  width = 3, 3Ji,n;QLm  
  "signal output power (W, leftscale)",     !相应的文本字符串标签 %{HqF>=~  
  finish set_P_in(pump, P_pump_in) 'kh%^_FH7  
r`S]`&#}(  
f: (set_P_in(pump,x); 100 * n_av(2)),   !改变泵浦信号功率对能级2上激活粒子占比的影响 ~(%G; fZ?x  
  yscale = 2, mDM]RAub)  
  step = 5, @Rx/]wyH  
  color = magenta, ?<nz2 piP,  
  width = 3, "%.#/!RG  
  "population of level 2 (%, rightscale)", C62<pLJf  
  finish set_P_in(pump, P_pump_in) *E$D,  
]AHUo;(f%  
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 }VFSF/\^  
  yscale = 2, 2}}~\C}o+  
  step = 5, gsU&}R1*h  
  color = red, g` h>:5]  
  width = 3, '6xn!dK  
  "population of level 3 (%, rightscale)", QPFpGS{d  
  finish set_P_in(pump, P_pump_in) *50Ykf  
,$}Q#q  
;l`8w3fDt  
; ------------- _OrE{  
diagram 3:                         !输出图表3 (+^1'?C8  
xE)pj|  
"Variation ofthe Fiber Length" H/L3w|2+  
+6;OB@  
x: 0.1, 5 IvO3*{k ,  
"fiber length(m)", @x -_314j=`/  
y: 0, 10 \4vFEJSh  
"opticalpowers (W)", @y He]F~GXP  
frame sP+S86 u  
hx ' l!QGKz  
hy ~z aV.3#  
]3I_H+hU  
f: (set_L(x);P_out(signal_fw)),     !改变光纤长度对信号光输出功率的影响 T4f:0r;^f*  
  step = 20,             [2FXs52  
  color = blue, k[zf`x^  
  width = 3, CY 7REF  
  "signal output" kh5V&%>?  
A{c6XQR~z  
;f: (set_L(x);P_out(pump)),                     !改变光纤长度对泵浦信号输出功率的影响 =k8A7P  
   step = 20, color = red, width = 3,"residual pump" 9<YB &:<  
3{_+dE"9  
! set_L(L_f) {restore the original fiber length } '{+hti,Lh  
?_^9e  
J`V6zGgW  
; ------------- _ Po9pZ  
diagram 4:                                  !输出图表4 P;y/`_jo  
s e1ipn_A  
"TransverseProfiles" au7BqV!uL  
%!=YNm  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) x[?_F  
eU12*(  
x: 0, 1.4 * r_co /um /J6CSk  
"radialposition (µm)", @x 1";~"p2(  
y: 0, 1.2 * I_max *cm^2 MUo?ajbqOd  
"intensity (W/ cm&sup2;)", @y 4Cfwz-Qo  
y2: 0, 1.3 * N_Tm r'!l` gm,S  
frame ^Uf`w7"iY  
hx E?zp?t:a  
hy Kr#=u~~M  
"E8!{  
f: N_dop(1, x * um,0),      !掺杂浓度的径向分布 3a5H<3w_  
  yscale = 2, >:xnjEsi$/  
  color = gray, cK258mY  
  width = 3, J)-owu;  
  maxconnect = 1, k]JLk"K  
  "N_dop (right scale)" Oh^X^*I$@  
 [:k'VXL  
f: I(pump, -1, x *um, 0) * cm^2,    !泵浦光沿光纤径向的强度分布 F+6ZD5/  
  color = red, H}@|ucM"\  
  maxconnect = 1,           !限制图形区域高度,修正为100%的高度 v_ J.M]  
  width = 3, jab]!eY  
  "pump" F;ZLoG*U  
Z  b1v  
f: I(signal_fw, -1,x * um, 0) * cm^2,  !信号光沿光纤径向的强度分布 o O|^ [b#  
  color = blue, s,}<5N]U  
  maxconnect = 1, jmb\eOq+~V  
  width = 3, @Yg7F>s  
  "signal" &l.^UQ   
b'&pJ1]]}  
$ -y+97  
; ------------- L=p.@VSZ  
diagram 5:                                  !输出图表5 l?~ci ;lG  
<hea%6  
"TransitionCross-sections" 0g+@WK6y  
Brl6r8LGi  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) s%:fB(  
a~%ej.)l  
x: 1450, 2050 A/QVotcU  
"wavelength(nm)", @x T'V(%\w  
y: 0, 0.6 m^=, RfUUd  
"cross-sections(1e-24 m&sup2;)", @y 06`__$@h  
frame i-<=nD&?t  
hx (kHR$8GFM  
hy JTI m`t"d=  
wv7jh~x(4  
f: s12_Tm(x * nm) /1e-24,      !Tm3+吸收截面与波长的关系 x B?:G  
  color = red, `~RV  
  width = 3, {, |"Rpd  
  "absorption" QA3l:D}u  
f: s21_Tm(x * nm) /1e-24,  !Tm3+发射截面与波长的关系 <H p"ZCN  
  color = blue, ^"Y'zI L  
  width = 3, !G,$:t1-=V  
  "emission" Yyo|W;a]  
epL[PL}  
lileisgsz 2021-09-28 09:47
感谢,视频上有点看不清楚
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