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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

(* r :MaAT<  
Demo for program"RP Fiber Power": thulium-doped fiber laser, lO[jf6gB  
pumped at 790 nm. Across-relaxation process allows for efficient YPJx/@Z`  
population of theupper laser level. CR8r|+(8  
*)            ！（*  *）注释语句 =A&*SE o5  
yp/V 8C  
diagram shown: 1,2,3,4,5  ！指定输出图表 j &[WE7wf  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 %Fm;LQa ]  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 ';T5[l,  
; 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 H2R^t{ w  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 VNEZBy"F  
; 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 aKFA&Xnsl  
|>fS"u  
include"Units.inc"         ！读取“Units.inc”文件中内容 3Os3=Ix  
t>|N4o  
include"Tm-silicate.inc"    ！读取光谱数据 KJ{F,fr+v  
gm\o>YclS  
; Basic fiberparameters:    ！定义基本光纤参数 $izpH  
L_f := 4 { fiberlength }      ！光纤长度 L-:L= snO  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 o0+BQ&A)s*  
r_co := 6 um { coreradius }                ！纤芯半径 Y\9*e5?`I3  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 ``)1`wx$  
$m0x8<7nu  
; Parameters of thechannels:                ！定义光信道 |l\/ {F  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm nXaX=  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 ?g#t3j>zoF  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W j I@$h_n  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um NHVx!Kc  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 z ex.0OT;  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 zZ0V6T}  
Zg f||,  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm K[yJu 4  
w_s := 7 um                          ！信号光的半径 F,2#;t4  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 ?-&D'  
loss_s := 0                            ！信号光寄生损耗为0 yzzre>F  
|a:VpM  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 ^* v{t?u  
'# 2J?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 v5ddb)  
calc gbv[*R{<%  
  begin naCI55Wx  
    global allow all;                   ！声明全局变量 G9":z|  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 s31_3?Vdf,  
    add_ring(r_co, N_Tm); hg/&[/eodm  
    def_ionsystem();              ！光谱数据函数 9NXiCP9A  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 (mr` ?LI}  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 / H/Ne )r  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 Sq]1SW3  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 L"<Eov6  
    finish_fiber();                                   ;pK"N:|  
  end; j?)`VLZ  
_rh.z_a7w  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 2l4i-;  
show "Outputpowers:"                                   ！输出字符串Output powers： /4BXF4ksi,  
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） ^G<M+RF2J  
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<['FRf"  
zszx@`/3  
U>jk`?zW  
; ------------- MpvA--  
diagram 1:                   !输出图表1 &b8D'XQu  
'MlC 1HEp  
"Powers vs.Position"          ！图表名称 g7yHhF>%X  
-T6%3>h  
x: 0, L_f                      ！命令x: 定义x坐标范围 ,IB)Kk2  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 KA2B3\  
y: 0, 15                      ！命令y: 定义y坐标范围 ?kefRev<#h  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 n=MYv(Pp}  
frame          ！frame改变坐标系的设置 5E(P,!-.  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） Gnq~1p5^  
hx             ！平行于x方向网格 <xNM@!'\h  
hy              ！平行于y方向网格 yKhzymS}T  
y_r6T XnGL  
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 f#MN-1[67  
  color = red,  ！图形颜色 +'4dP#  
  width = 3,   ！width线条宽度 )fr\ V."  
  "pump"       ！相应的文本字符串标签 +38P$Koz{r  
f: P(signal_fw, x),  ！P(signal_fw ,x) 函数是计算x位置处的前向信号光功率 x"T^>Q  
  color = blue,     O:R{4Q*5  
  width = 3, Ik)Q0_<a  
  "fw signal" bJ}+<##  
f: P(signal_bw, x),   ！P(signal_bw ,x) 函数是计算x位置处的后向信号光功率 tTamFL6  
  color = blue, ]gk1h=Y~h  
  style = fdashed, h2 <$L  
  width = 3, KPqI(  
  "bw signal" :M`BVZ1t  
5E|2 S_)G  
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 }H.vH  
  yscale = 2,            ！第二个y轴的缩放比例 ((q(Q9(F  
  color = magenta, :]jtV~E\  
  width = 3, AV! cCQ  
  style = fdashed, gC 4#!P  
  "n2 (%, right scale)" $^>vJk<  
g/gLG:C  
f: 100 * n(x, 3),          ！n(x ,3) 函数是计算x位置处激活粒子数在能级3上的占比 .[A S  
  yscale = 2, 5E=Odep`  
  color = red, gC-0je  
  width = 3, [%Xfl7;Wh  
  style = fdashed, WRM}gWv*  
  "n3 (%, right scale)" N*W.V,6yH  
Dh<e9s:  
^f]pK&MAmN  
; ------------- .ji%%f  
diagram 2:                    ！输出图表2 ( PlNaasV  
`-m7CT sA  
"Variation ofthe Pump Power" voEc'JET  
(H^o8J   
x: 0, 10 GK+w1%6)  
"pump inputpower (W)", @x .}s a2-  
y: 0, 10 _aYQ(FO  
y2: 0, 100 :8 :>CHa  
frame \PJ89u0  
hx `!N?#N:b)  
hy ]ghPbS@  
legpos 150, 150 *uR'eXW  
i YkNtqn/  
f: (set_P_in(pump, x);P_out(signal_fw)), ！set_P_in(pump,x)改变泵浦信道功率；P_out(signal_fw)输出前向信号光 l:HuG!  
  step = 5, )-gyDA  
  color = blue, 9:s!#FYFM  
  width = 3, ipG+qj/=  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 l"CONzm!  
  finish set_P_in(pump, P_pump_in) O8%/Id  
fJKOuFK  
f: (set_P_in(pump,x); 100 * n_av(2)),   ！改变泵浦信号功率对能级2上激活粒子占比的影响 ]vMft?  
  yscale = 2, hrK^oa_[W  
  step = 5, C.O-iBVe#  
  color = magenta, Vv]mME@  
  width = 3, |n;7fqK  
  "population of level 2 (%, rightscale)", Re_.<_$  
  finish set_P_in(pump, P_pump_in) A[MEtI=Q J  
A\>qoR!Y  
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 aoN[mV '  
  yscale = 2, }J1#UH_E  
  step = 5, t*#T~3p  
  color = red, ::6@mFLR  
  width = 3, {1[8,Ho  
  "population of level 3 (%, rightscale)", i fUgj8i_  
  finish set_P_in(pump, P_pump_in) .E(Ucnz/  
IV76#jL  
Sj\8$QIXC  
; ------------- zQ~nS  
diagram 3:                         ！输出图表3 $v,_8{ !  
3c)xNXq m  
"Variation ofthe Fiber Length" %?ad.F+7  
p6p_B   
x: 0.1, 5 !WN r09`  
"fiber length(m)", @x y$rp1||lH  
y: 0, 10 3f0RMk$pH  
"opticalpowers (W)", @y 3 }XS| Y  
frame x\WKsc  
hx 38 F8(QU{  
hy 70@:!HI]  
zKo,B/Ke4  
f: (set_L(x);P_out(signal_fw)),     ！改变光纤长度对信号光输出功率的影响 {dDU^7O  
  step = 20,             G 9;WO*  
  color = blue, = >9`qcNW_  
  width = 3, gU:jx  
  "signal output" ^+88z>  
{.v+ iSM  
;f: (set_L(x);P_out(pump)),                     ！改变光纤长度对泵浦信号输出功率的影响 1jR<H$aS  
   step = 20, color = red, width = 3,"residual pump" w5p+Yx=q  
/n_N`VJ7H  
! set_L(L_f) {restore the original fiber length } z@2NAC  
o&zeOJW  
)9s[-W,e  
; ------------- k# /_Zd  
diagram 4:                                  ！输出图表4 %j yLRT]H  
EG,RlmcPp  
"TransverseProfiles" qbjRw!2?w  
9kcAMk1K  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) &W1c#]q@r  
!^w+<p  
x: 0, 1.4 * r_co /um @<_4Nb  
"radialposition (µm)", @x 3/iGSG`  
y: 0, 1.2 * I_max *cm^2 q*>`HTPcU  
"intensity (W/ cm&sup2;)", @y d:3G4g  
y2: 0, 1.3 * N_Tm v q|W&  
frame HghNI  
hx rxO|k0x^C  
hy DF<_Ns!  
Q!c*2hI  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 I_Q'+d  
  yscale = 2, ^XV$J-  
  color = gray, "!2Fy-Y  
  width = 3, Xr-eDUEi  
  maxconnect = 1, h/d&P  
  "N_dop (right scale)" |VIBSty2d  
t<rhrW75P  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 f5AK@]4G  
  color = red, bV}43zI.  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 n(&6 E3ZcI  
  width = 3, N]gdS]pP2{  
  "pump"  QHOem=B  
P7Kp*He)  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 C]82Mt  
  color = blue, ^J?I-LG  
  maxconnect = 1, M%Ov6u<I8  
  width = 3, bX8Bn0#a+  
  "signal" ~)ls.NXI  
%c):^;6p  
'F1NBL   
; ------------- 't]=ps  
diagram 5:                                  ！输出图表5 1qtu,yIf  
nI&Tr_"tm  
"TransitionCross-sections" C,.$g>)MZK  
k? X7h2  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) Iq MXd K|  
|oa 9 g2  
x: 1450, 2050 \)pk/  
"wavelength(nm)", @x 52=?! JM  
y: 0, 0.6 lIz"mk  
"cross-sections(1e-24 m&sup2;)", @y 1-4W4"#  
frame Ry8@U9B6,t  
hx 0@vSl%I+  
hy y]yp8Bs+  
Gz@'W%6yaV  
f: s12_Tm(x * nm) /1e-24,      ！Tm3+吸收截面与波长的关系 "9aiin  
  color = red, 'Tj9btM*cL  
  width = 3, gq!| 0  
  "absorption" /aP4'U8ov  
f: s21_Tm(x * nm) /1e-24,  ！Tm3+发射截面与波长的关系 x xWnB  
  color = blue, YLk/16r  
  width = 3, HsO4C)/  
  "emission" adRvAq]mA  
L'M'I0"/  
lileisgsz 2021-09-28 09:47
感谢，视频上有点看不清楚
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