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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

(* Y]`.InG@  
Demo for program"RP Fiber Power": thulium-doped fiber laser, 9X<OJT;3J  
pumped at 790 nm. Across-relaxation process allows for efficient Ma-\^S=  
population of theupper laser level. a)-FG P^  
*)            ！（*  *）注释语句 5-u=o )>  
L}{`h  
diagram shown: 1,2,3,4,5  ！指定输出图表 OU DcY@x~  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 7XrfuG*L$  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 "R #k~R  
; 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 JMBK{JK>  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 BG2)v.CU  
; 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 jMBiaX`F  
}]P4-KqI  
include"Units.inc"         ！读取“Units.inc”文件中内容 v *hRz;  
+m\|e{G  
include"Tm-silicate.inc"    ！读取光谱数据 |tMn={  
U$&hZ_A  
; Basic fiberparameters:    ！定义基本光纤参数 XhU@W}}  
L_f := 4 { fiberlength }      ！光纤长度 G1T^a>tj4  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 I{0 k  
r_co := 6 um { coreradius }                ！纤芯半径 "L"150Ih  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 Y o0FUj  
<S"~vKD'  
; Parameters of thechannels:                ！定义光信道 (n( fI f  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm 1,y&d}GW  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 0O!cN_l|  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W ,0$)yZ3*3,  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um kW=z+  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 T0HuqJty  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 m,LG=s  
|V[9}E: h  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm %6j)=IOts  
w_s := 7 um                          ！信号光的半径 JEn3`B!*  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 &FdWFt=X  
loss_s := 0                            ！信号光寄生损耗为0 5@osnf?  
Y[ reD  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 ZBD;a;wx  
RH)EB<PV  
; 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 Zzua17  
calc pI`?(5iK6|  
  begin &UHPX?x  
    global allow all;                   ！声明全局变量 }|)R   
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 -OZ 5vH0  
    add_ring(r_co, N_Tm); UO`;&e-DB  
    def_ionsystem();              ！光谱数据函数 wVs.Vcwr  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 _hf4A8ak  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 qL5I#?OMkU  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 UK#&lim  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 Upl6:xYrG  
    finish_fiber();                                   td2/9|Q  
  end; <c[U#KrvJ  
v'2[[u{7*  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 CLD-mx|?  
show "Outputpowers:"                                   ！输出字符串Output powers： 4wzlJ19E(  
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） RNVbcd  
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） /{2*WI;  
ge3sU5iZ  
8cx=#Me  
; ------------- 5@Bu99`  
diagram 1:                   !输出图表1 Ko>&)%))$X  
0Y=![tO8  
"Powers vs.Position"          ！图表名称 VvbFp  
=tTqN+4  
x: 0, L_f                      ！命令x: 定义x坐标范围 |iFVh$N  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 tL SN`6[:  
y: 0, 15                      ！命令y: 定义y坐标范围 \/7i-B]G7  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 3CjL\pIC  
frame          ！frame改变坐标系的设置 8{U-m0v  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） B DY}*cX  
hx             ！平行于x方向网格 k`HP "H  
hy              ！平行于y方向网格 aMARZ)V  
stl 1Q O(h  
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 " }gVAAvc7  
  color = red,  ！图形颜色 .V9e=yW!*  
  width = 3,   ！width线条宽度 &}mw'_ I  
  "pump"       ！相应的文本字符串标签 3 vP(S IF  
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 r5&I? 0   
  color = blue,     Sgb*tE)T  
  width = 3, nq} Q  
  "fw signal" Sx gYjIa-  
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 jg  2qGC  
  color = blue, 7DW]JK l  
  style = fdashed, XALI<ZY  
  width = 3, NY$uq+Z>  
  "bw signal" M_ 0zC1  
'J*<iA*W  
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 $DFv30 f  
  yscale = 2,            ！第二个y轴的缩放比例 R`Aj|C z  
  color = magenta, pZZgIw}aS  
  width = 3, 4W4kwU6D  
  style = fdashed, fHrt+_Zn|  
  "n2 (%, right scale)" D;GD<zC]  
a^qNJ?R !  
f: 100 * n(x, 3),          ！n(x ,3) 函数是计算x位置处激活粒子数在能级3上的占比 sH,kW|D  
  yscale = 2, 2s*#u<I  
  color = red, 1PaUI#X"2F  
  width = 3, ?71+ f{s  
  style = fdashed, &WXY'A=  
  "n3 (%, right scale)" Dq\ Jz~  
T[k4lM  
U;_[b"SW%  
; ------------- wCMQPt)VS  
diagram 2:                    ！输出图表2 `i ,_aFB|  
Hi! Jj  
"Variation ofthe Pump Power" K)7zKEp`cj  
P47V:E%  
x: 0, 10 Bsf7mcXz7z  
"pump inputpower (W)", @x {P9J8@D  
y: 0, 10 >t,M  
y2: 0, 100 s6*ilq1  
frame os3 8u!3-  
hx ]e:/"   
hy %Kh4m7  
legpos 150, 150 psh^MX)Q  
pD"vRbYF  
f: (set_P_in(pump, x);P_out(signal_fw)), ！set_P_in(pump,x)改变泵浦信道功率；P_out(signal_fw)输出前向信号光 tary6K9K+  
  step = 5, i LBvGZ<9  
  color = blue, FQ%c~N  
  width = 3, -F&U  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 r'LVa6e"N  
  finish set_P_in(pump, P_pump_in) rj ]F87"  
F~#zxwd  
f: (set_P_in(pump,x); 100 * n_av(2)),   ！改变泵浦信号功率对能级2上激活粒子占比的影响 uhH^>z KA  
  yscale = 2, !  hd</_#  
  step = 5, a/Q$cOs  
  color = magenta, s>_V   
  width = 3, ^Jp&H\gI.  
  "population of level 2 (%, rightscale)", V!%jf:k  
  finish set_P_in(pump, P_pump_in) &K_)#v`|  
0Q,g7K<d  
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 v dbO(  
  yscale = 2, m~#!  
  step = 5, W+wA_s2&D  
  color = red, ',3HlOJ:  
  width = 3,  ~fl@ 2  
  "population of level 3 (%, rightscale)", ^VW PdH/Fe  
  finish set_P_in(pump, P_pump_in) rVvR!"//yH  
hDP/JN8y  
bUV >^d  
; ------------- 0<"k8 k@J  
diagram 3:                         ！输出图表3  %R#L  
M j-vgn&/  
"Variation ofthe Fiber Length" 5wB =>  
8bK|:B#6,  
x: 0.1, 5 -\ZcOXpMx=  
"fiber length(m)", @x +;BAV  
y: 0, 10 rt3qdk5U  
"opticalpowers (W)", @y .LVQx  
frame wHZW `  
hx 2n><RZ/9  
hy eg<bi@C1|  
kh~'Cn "O  
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 84HUBud76Y  
  step = 20,             @J{m@ji{  
  color = blue, i"zuil  
  width = 3, \y6OUM2y  
  "signal output" eAUcv`[#p  
5Dp#u  
;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 !Bz0^ 1,L  
   step = 20, color = red, width = 3,"residual pump" rWys'uc  
^ PI5L  
! set_L(L_f) {restore the original fiber length } ELrsx{p:  
sAo& uZ  
ERwHLA  
; ------------- i 8!zu!-0  
diagram 4:                                  ！输出图表4 (npj_s!.C)  
j.a`N2]WE  
"TransverseProfiles" mOo`ZcTU  
+[\eFj|=  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) #QCphhG  
iu**`WjI\  
x: 0, 1.4 * r_co /um _0+0#! J!  
"radialposition (µm)", @x 0![ +Q4"  
y: 0, 1.2 * I_max *cm^2 T|&[7%F3"  
"intensity (W/ cm&sup2;)", @y f)]%.>  
y2: 0, 1.3 * N_Tm ,F&g5'  
frame _X ~87  
hx U$oduY#  
hy yx V:!gl  
FZreP.2)!  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 [dtbkQt,c  
  yscale = 2, |6G m:jV  
  color = gray, e\O/H<  
  width = 3, [m^+,%m5]  
  maxconnect = 1, Vcd.mE(t%  
  "N_dop (right scale)" Pxn,Qw*  
sL E#q+W  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 'B+ ' (f  
  color = red, q&C""!h^  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 Zmbfq8K  
  width = 3, 4|A>b})H  
  "pump" </uO e.l>Q  
t|t#vcB  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 \OlmF<~  
  color = blue, :JlP[I  
  maxconnect = 1, c1X1+b,  
  width = 3, JNcYJ[wqv  
  "signal" Q)"A-"y  
<dyewy*.L  
tabT0  
; ------------- 8Sz})UZ  
diagram 5:                                  ！输出图表5 fnx-s{c?  
o1nURJ!  
"TransitionCross-sections" m%?V7-9!k  
U]a*uF~h  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) 1CLL%\V  
boG_f@dv(  
x: 1450, 2050 NnVnUgx  
"wavelength(nm)", @x f6$b s+oP  
y: 0, 0.6 <w3!!+oK"  
"cross-sections(1e-24 m&sup2;)", @y Ov<NsNX]  
frame D7_*k%;@  
hx Z|}G6]h  
hy `~eUee3b.~  
k4 F"'N   
f: s12_Tm(x * nm) /1e-24,      ！Tm3+吸收截面与波长的关系 !?Wp+e6  
  color = red, KZPEG!-5  
  width = 3, X$/2[o#g  
  "absorption" Haqm^Ky$  
f: s21_Tm(x * nm) /1e-24,  ！Tm3+发射截面与波长的关系 [9:9Ql_h  
  color = blue, hMtf.3S7c  
  width = 3, S*yjee<@  
  "emission" ;;&}5jcV  
T0]MuIJ).  
lileisgsz 2021-09-28 09:47
感谢，视频上有点看不清楚
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