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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

(* m@`8A  
Demo for program"RP Fiber Power": thulium-doped fiber laser, /WV7gO&L1  
pumped at 790 nm. Across-relaxation process allows for efficient @pI5lh  
population of theupper laser level. `dMqe\o%!  
*)            ！（*  *）注释语句 rKHY?{!  
]{ BE r*  
diagram shown: 1,2,3,4,5  ！指定输出图表 {*ZY(6^  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 Ogt]_  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 Kz<@x`0   
; 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 2-zT$`[]J  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 3lLMu B+  
; 5:"Transition Cross-sections"    ！不同波长的跃迁横截面，横坐标波长，纵坐标为横截面 }),w1/#5u8  
Bx"7%[  
include"Units.inc"         ！读取“Units.inc”文件中内容 =z?%;4'|  
nhSb~QqEh  
include"Tm-silicate.inc"    ！读取光谱数据 .,~(%#Wl$  
p_ Fy >j  
; Basic fiberparameters:    ！定义基本光纤参数 V>64/  
L_f := 4 { fiberlength }      ！光纤长度 z|?R/Gf8  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 bsxTqJ  
r_co := 6 um { coreradius }                ！纤芯半径 iyVB3:M  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 q'oMAMf}  
FVv8--  
; Parameters of thechannels:                ！定义光信道 H* ,,^  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm Y $g$x<7  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 wdzOFDA  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W '^%~JyU  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um %8aC1x  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 Xd:7"/:r  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 juAMAplf  
?::NO Dg  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm D2YZ9e   
w_s := 7 um                          ！信号光的半径 3:"]Rn([P  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 eMOD;{Q?X  
loss_s := 0                            ！信号光寄生损耗为0 t3Z_Dp~\  
FZd.L6q  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 KPSh#x&I  
RjJU4q  
; 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 &"_u}I&\  
calc ?^' 7+8C*J  
  begin nfb]VN~(  
    global allow all;                   ！声明全局变量 7;.xc{  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 UH@a s  
    add_ring(r_co, N_Tm); }14 {2=!Q  
    def_ionsystem();              ！光谱数据函数 eLwTaW !C  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 \&V0vN1  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 DfJ2PX}q  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 , xx6$uZ  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 @RD+xYm  
    finish_fiber();                                   k<w(i k1bi  
  end; *IlaM'[*  
uBg 8h{>  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 {v aaFs  
show "Outputpowers:"                                   ！输出字符串Output powers： j^`X~gE  
show"pump:     ", P_out(pump):d3:"W"  ！输出字符串pump：和计算值（格式为3个有效数字，单位W） {-9jm%N  
show"signal:   ",P_out(signal_fw):d3:"W" ！输出字符串signal：和计算值（格式为3个有效数字，单位W） D/(L  
Q8p&Ki;i  
C7T(+Wd!,  
; ------------- LW#M@  
diagram 1:                   !输出图表1 LiDvaF:@L!  
?wMHS4  
"Powers vs.Position"          ！图表名称 J?)RfK|!  
Xog/O i  
x: 0, L_f                      ！命令x: 定义x坐标范围 ~:;3uL s,8  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 zHB_{(o7  
y: 0, 15                      ！命令y: 定义y坐标范围 Auy".br'  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 m!XI{F@x  
frame          ！frame改变坐标系的设置 !yjo   
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） z `8cOK-  
hx             ！平行于x方向网格 mOll5O7VW  
hy              ！平行于y方向网格 BOlAm*tFt  
m:tiY [c>W  
f: P(pump, x),    ！命令f: 定义函数图；P(pump, x)函数是计算x位置处的泵浦光功率 Itm8b4e9;  
  color = red,  ！图形颜色 Qx|H1_6  
  width = 3,   ！width线条宽度 |wxGpBau  
  "pump"       ！相应的文本字符串标签 78#!Q.##  
f: P(signal_fw, x),  ！P(signal_fw ,x) 函数是计算x位置处的前向信号光功率 I"L;L?\S  
  color = blue,     TmRx KrRs  
  width = 3, L/}iy}  
  "fw signal" BJjx|VA+  
f: P(signal_bw, x),   ！P(signal_bw ,x) 函数是计算x位置处的后向信号光功率 4FeEGySow  
  color = blue, = Je>`{J  
  style = fdashed, UyYfpL"$A"  
  width = 3, ul7o%Hs  
  "bw signal" r >{G`de4  
?4t-caK^u  
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 `qpc*enf0  
  yscale = 2,            ！第二个y轴的缩放比例 '3tw<k!1{.  
  color = magenta, O0l^*nZ46t  
  width = 3, E +_&HG}a  
  style = fdashed, mxTk+j=  
  "n2 (%, right scale)" qV1O-^&[f=  
S*W;%J5  
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 5vp|?-\h>  
  yscale = 2, pck>;V  
  color = red, wJ"ev.A)  
  width = 3, 'E]A.3-Mt  
  style = fdashed, </oY4$l'  
  "n3 (%, right scale)" ,4F,:w  
`_AM` >_  
VC&c)X  
; ------------- _."E%|5  
diagram 2:                    ！输出图表2 ?qHF}k|  
V% axeqs  
"Variation ofthe Pump Power" kl7A^0Qrz  
s3t!<9[m  
x: 0, 10 83;IyvbL  
"pump inputpower (W)", @x &~~s6   
y: 0, 10 f@z*3I;  
y2: 0, 100 L/r{xS  
frame >q( 5ir  
hx `| 9Ku  
hy Y(i?M~3\t  
legpos 150, 150 Vu]h4S:  
X-Ycz 5?  
f: (set_P_in(pump, x);P_out(signal_fw)), ！set_P_in(pump,x)改变泵浦信道功率；P_out(signal_fw)输出前向信号光 vZjZb(jlN  
  step = 5, _vrWj<wyf  
  color = blue, i^|@"+  
  width = 3, |O (G nsZ  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 y4F^|kS) [  
  finish set_P_in(pump, P_pump_in) qi=3L  
jxY-u+B  
f: (set_P_in(pump,x); 100 * n_av(2)),   ！改变泵浦信号功率对能级2上激活粒子占比的影响 !WKk=ysFS  
  yscale = 2, sbla`6Fb  
  step = 5, Y6eEGo"K.+  
  color = magenta, 'j79GC0  
  width = 3, rx:lKoOnB  
  "population of level 2 (%, rightscale)", &BgU:R,  
  finish set_P_in(pump, P_pump_in) \Hum}0[  
zqGYOm$r  
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 XZO<dhZX:  
  yscale = 2, XiG88Kwv  
  step = 5, && C~@WY,r  
  color = red, lIq~~cv)  
  width = 3, 7Po/_%  
  "population of level 3 (%, rightscale)", L?f qcW{  
  finish set_P_in(pump, P_pump_in) \Da~p9 T&  
g{a d0.y,  
dofR)"<p,^  
; ------------- l$`G:%qHj  
diagram 3:                         ！输出图表3 VRhRwdC  
LW?2}`+  
"Variation ofthe Fiber Length" \>[gl!B_Rr  
IMR$x(g= F  
x: 0.1, 5 N7B}O*;  
"fiber length(m)", @x g.&\6^)8p  
y: 0, 10 *]9XDc]{j1  
"opticalpowers (W)", @y ^V,@=QL3U  
frame 2o}8W7y  
hx HjPH  
hy EEg O  
<^'{ G  
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 Y;PDZb K3  
  step = 20,             4+,*sn  
  color = blue, =z%s8D2  
  width = 3, Q,TaJ]  
  "signal output" "U{mMd!9L  
a!{hC)d*  
;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 'Sk6U]E~  
   step = 20, color = red, width = 3,"residual pump" ,dq`EsHg`M  
9 &[\*{  
! set_L(L_f) {restore the original fiber length } 1r&AB!Z #  
~M(pCSJ[  
/iTH0@Kw;  
; ------------- c{ZqQtfM  
diagram 4:                                  ！输出图表4 6UtG-WHHt  
LDSbd,GF  
"TransverseProfiles" ,7/\&X<`B  
Xek E#?.  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) gB'`I(q5.  
f61]`@Bk  
x: 0, 1.4 * r_co /um $Jt8d|UP  
"radialposition (µm)", @x Y-?51g[u  
y: 0, 1.2 * I_max *cm^2 a:wJ/ p  
"intensity (W/ cm&sup2;)", @y +# A|Zp<  
y2: 0, 1.3 * N_Tm y0lLFe~  
frame FkLQBpp(x  
hx I%C]>ZZh  
hy I-j(e)P(o_  
vsxvHot=  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 ei(| 5h  
  yscale = 2, .kz(V5  
  color = gray, 15RI(BN   
  width = 3, !;6W!%t.|  
  maxconnect = 1, S;G"L$&\  
  "N_dop (right scale)" N2M?5fF  
1j_aH#Fz:  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 @|JPE%T   
  color = red, })Ix .!p  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 9} IVNZc  
  width = 3, U!3uaz'  
  "pump" sf=%l10Fk#  
:C}KI)  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 i|:: v l  
  color = blue, hPNQGVv  
  maxconnect = 1, PkZf(=-X  
  width = 3, %`8KG(F^  
  "signal" #w[q.+A  
4C2>0O<^s  
MV:<w3!  
; ------------- e\+~  
diagram 5:                                  ！输出图表5 |>m# m*{S  
98<bF{#0WM  
"TransitionCross-sections" %m0L!|E  
!kjr> :)x  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) w7.?zb!N  
!nqm ;96  
x: 1450, 2050 .T N`p*  
"wavelength(nm)", @x )U3 H1 5  
y: 0, 0.6 ;NN(CKZ9A  
"cross-sections(1e-24 m&sup2;)", @y 2!"\;/  
frame l%Fse&4\  
hx ft. }$8vIT  
hy ;^*+:e  
2rE~V.)%  
f: s12_Tm(x * nm) /1e-24,      ！Tm3+吸收截面与波长的关系 _sCJ3ZJ  
  color = red, 0'`8HP  
  width = 3, 8 MACbLY  
  "absorption" V+@%(x@D_  
f: s21_Tm(x * nm) /1e-24,  ！Tm3+发射截面与波长的关系 u3v6$CD?  
  color = blue, olQ8s *  
  width = 3, dp%pbn6w  
  "emission" JWm^RQ  
+Hm+ #o  
lileisgsz 2021-09-28 09:47
感谢，视频上有点看不清楚
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