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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

(* 3 *g>kRMJ  
Demo for program"RP Fiber Power": thulium-doped fiber laser, 8gI f  
pumped at 790 nm. Across-relaxation process allows for efficient s+omCr|H;A  
population of theupper laser level. _`Lv@T.  
*)            !(*  *)注释语句 'Edm /+  
&N+i3l6`  
diagram shown: 1,2,3,4,5  !指定输出图表 iCZuE:I1K,  
; 1: "Powersvs. Position"     !分号是注释;光纤长度对功率的影响 $F#eD 0|  
; 2:"Variation of the Pump Power"  !泵浦光功率变化对信号输出功率的影响 <meQ  
; 3:"Variation of the Fiber Length"!信号输出功率vs 光纤长度的变化,仿真最佳光纤长度 ~R+,4  
; 4:"Transverse Profiles"             !横向分布,横坐标为半径位置 s%Y8;D,~+  
; 5:"Transition Cross-sections"    !不同波长的跃迁横截面,横坐标波长,纵坐标为横截面 Kn#CIFbBN  
;"R1>tw3)  
include"Units.inc"         !读取“Units.inc”文件中内容 /%F}vW(!  
g##yR/L  
include"Tm-silicate.inc"    !读取光谱数据 rYn)E=FG/  
hKjG/g:#G  
; Basic fiberparameters:    !定义基本光纤参数 9CNeMoA$p:  
L_f := 4 { fiberlength }      !光纤长度 B3';Tcs  
No_z_steps := 50 {no steps along the fiber } !光纤步长,大括号{ }是注释,相当于备注 FdcmA22k*  
r_co := 6 um { coreradius }                !纤芯半径 9!>Ks8'.d  
N_Tm := 100e24 { Tmdoping concentration }  !纤芯Tm离子掺杂浓度 C{<dzooz  
2m8|0E|@  
; Parameters of thechannels:                !定义光信道 E&_q"jJRi  
l_p := 790 nm {pump wavelength }                !泵浦光波长790nm <0h,{28  
dir_p := forward {pump direction (forward or backward) }   !前向泵浦 # 9@K  
P_pump_in := 5 {input pump power }                    !输入泵浦功率5W 3!*qB-d  
w_p := 50 um {radius of pump cladding }               !包层泵浦相应的半径 50um +U^H`\EUr  
I_p(r) := (r <=w_p) { pump intensity profile }          !泵浦光强度分布 :T9 P9<  
loss_p := 0 {parasitic losses of pump wave }           !泵浦光寄生损耗为0 d"nms\=p  
t`!@E#VK  
l_s := 1940 nm {signal wavelength }                   !信号光波长1940nm Ij{ K\{y  
w_s := 7 um                          !信号光的半径 * ujJpJZ2  
I_s(r) := exp(-2 *(r / w_s)^2)            !信号光的高斯强度分布 $E@U-=m  
loss_s := 0                            !信号光寄生损耗为0 ]*&`J4i  
86f8b{_e"  
R_oc := 0.70 {output coupler reflectivity (right side) }      !输出耦合反射率 pH/_C0e`7  
ZQ)vvD<  
; Function for defining themodel:   !定义模型函数,一定要有calc命令,否则函数只会被定义,但不会被执行 v1aE[Q  
calc bQ`|G(g-d  
  begin K2@],E?e%|  
    global allow all;                   !声明全局变量 IW$qP&a  
    set_fiber(L_f, No_z_steps, '');        !光纤参数 9\S,$A{{*  
    add_ring(r_co, N_Tm); 2,^ U8/  
    def_ionsystem();              !光谱数据函数 IA3m.Vxj ^  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  !泵浦光信道 0qSf7"3f  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      !前向信号光信道 3;<Vv*a"Dm  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    !后向信号光信道 NxGSs_7  
    set_R(signal_fw, 1, R_oc);                                 !设置反射率函数 3jzmiS]  
    finish_fiber();                                   JF6=0  
  end; m.b}A'GT  
6Z>G%yK  
; Display someoutputs in the Output window (on the right side): !在Output aera区域显示输出 #J`M R05  
show "Outputpowers:"                                   !输出字符串Output powers: 3:mZ1+  
show"pump:     ", P_out(pump):d3:"W"  !输出字符串pump:和计算值(格式为3个有效数字,单位W) Dwa.ZY}-  
show"signal:   ",P_out(signal_fw):d3:"W" !输出字符串signal:和计算值(格式为3个有效数字,单位W) =>Q$S  
]z#9)i_l3  
+d'1  
; ------------- r-'CB  
diagram 1:                   !输出图表1 1F]jy  
 8\Uy  
"Powers vs.Position"          !图表名称 Fu\!'\6  
,(v=ZeI  
x: 0, L_f                      !命令x: 定义x坐标范围 XQI!G_\+C  
"position infiber (m)", @x      !x轴标签;@x 指示这些字符串沿坐标轴放置 ]uZaj?%J<  
y: 0, 15                      !命令y: 定义y坐标范围 lDVw2J'p  
y2: 0, 100                    !命令y2: 定义第二个y坐标范围 3ahbv%y  
frame          !frame改变坐标系的设置 .:9XpKbt  
legpos 600, 500  !图行在图表窗口中的位置(相对于左上角而言) R^Y>v5jAe  
hx             !平行于x方向网格 w%uM=YmuT  
hy              !平行于y方向网格 Sh;Z\nj  
YGsg0I't  
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 myqQqVW  
  color = red,  !图形颜色 3( o~|%  
  width = 3,   !width线条宽度 D`hg+64}  
  "pump"       !相应的文本字符串标签 R d|M)  
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 #p7_\+&5s  
  color = blue,     Tr$37suF  
  width = 3, y*vg9`$k  
  "fw signal" 0kxe5*-|  
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 f =kt0  
  color = blue, v%4zP%4Ak[  
  style = fdashed, R&@NFin  
  width = 3, wCw_aXqq  
  "bw signal" :)j& t>aP  
 +OeoA{-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 kB]?95>Wx  
  yscale = 2,            !第二个y轴的缩放比例 @s8wYcW  
  color = magenta, #]}]ZE  
  width = 3, }@<Ru  
  style = fdashed, -o B` v'  
  "n2 (%, right scale)" 5$%CRm  
flS_rY5  
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 Ox^VU2K;&.  
  yscale = 2, ofy)}/i  
  color = red, V\P .uOI  
  width = 3, -5u. Ix3  
  style = fdashed, (&oT6Ji  
  "n3 (%, right scale)" ~=/.ZUQNX  
ds:&{~7L<T  
nV>=n,+s"  
; ------------- sUN9E4  
diagram 2:                    !输出图表2 k56*eEc  
|l673FcJ  
"Variation ofthe Pump Power" <I.{meDg  
^.u J]k0  
x: 0, 10 C sx EN4  
"pump inputpower (W)", @x wd<jh,Y  
y: 0, 10 C3-I5q(V]  
y2: 0, 100 \$Aw[ 5&t  
frame 9YVr9BM'K  
hx =0_((eXwf  
hy ~09kIO)  
legpos 150, 150 ucX!6)Op  
Z1sRLkR^  
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 KYC<*1k  
  step = 5, dEK bB  
  color = blue, *# ;  
  width = 3, an,JV0  
  "signal output power (W, leftscale)",     !相应的文本字符串标签 Oz4yUR  
  finish set_P_in(pump, P_pump_in) T~)zgu%q_  
]:Sb#=,!&!  
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 `(VVb@:o  
  yscale = 2, 2PQY+[jx  
  step = 5, ggHz-oNY  
  color = magenta, 3im2 `n  
  width = 3, tN-B`d 1  
  "population of level 2 (%, rightscale)", +9]CGYj  
  finish set_P_in(pump, P_pump_in) Ep8 y  
jOU1F1  
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 4S*7*ak{  
  yscale = 2, ydf;g5OZ  
  step = 5, "= >8UR  
  color = red, EBx!q8zz  
  width = 3, K?H(jP2mpM  
  "population of level 3 (%, rightscale)", DP=\FG"}x  
  finish set_P_in(pump, P_pump_in) p ^U#1c  
 H;Cv] -  
w_9[y  
; ------------- {!37w[s~  
diagram 3:                         !输出图表3 7!('+x(>  
eZ;DNZK av  
"Variation ofthe Fiber Length" #}aBRKZ f6  
"-A@d&5.  
x: 0.1, 5 eN-lz_..7  
"fiber length(m)", @x $[g8j`or!  
y: 0, 10 6M X4h  
"opticalpowers (W)", @y =(W l'iG   
frame *}Nh7 >d(  
hx W;ADc2#)  
hy nWsR;~pK  
&~sk7iGi  
f: (set_L(x);P_out(signal_fw)),     !改变光纤长度对信号光输出功率的影响 y];@ M<<?e  
  step = 20,             66MWOrr  
  color = blue, .R{+Pz D  
  width = 3, ~=9]M.$  
  "signal output" w$FN(BfA  
TDY =!  
;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 (5&l<u"K~  
   step = 20, color = red, width = 3,"residual pump" -`d(>ok  
sZYTpZgW4L  
! set_L(L_f) {restore the original fiber length } jWJ/gv~ $  
"7_qB8\  
+e( (!  
; ------------- un(fr7NW  
diagram 4:                                  !输出图表4 jW0aIS2O  
Ps9YP B-  
"TransverseProfiles" Uiu9o]n  
w"?E=RS  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) OvtiFN^s'  
O>sE~~g]?  
x: 0, 1.4 * r_co /um V9<CeTl'  
"radialposition (µm)", @x +d/^0^(D\5  
y: 0, 1.2 * I_max *cm^2 iBPx97a  
"intensity (W/ cm&sup2;)", @y hP26Bb1  
y2: 0, 1.3 * N_Tm 8!VF b+  
frame }*3#*y "  
hx ~#V1Gunq  
hy z{dn   
3:G94cp5  
f: N_dop(1, x * um,0),      !掺杂浓度的径向分布 9Qhk~^ngg  
  yscale = 2, X^ZUm  
  color = gray, } P/ x@N  
  width = 3, :h)A/k_  
  maxconnect = 1, `8N],X  
  "N_dop (right scale)" *r]Mn~3  
f+D a W  
f: I(pump, -1, x *um, 0) * cm^2,    !泵浦光沿光纤径向的强度分布 dI|`"jl#  
  color = red, ?UV ^6  
  maxconnect = 1,           !限制图形区域高度,修正为100%的高度 NP5;&}uv*!  
  width = 3, sKuPV  
  "pump" o= N_0.  
I6,sN9` K  
f: I(signal_fw, -1,x * um, 0) * cm^2,  !信号光沿光纤径向的强度分布 V;SXa|,  
  color = blue, |? l6S  
  maxconnect = 1, UON W3}-  
  width = 3, ."\&;:ZNv  
  "signal" -(YdK8  
a?QDf5C q  
w=S7zzL)  
; ------------- Rooem dCM  
diagram 5:                                  !输出图表5 MX#MDA-4  
|`yzH$,F  
"TransitionCross-sections" mQ]wLPP{1  
x#s=eeP1  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) (6S f#M  
.+TriPL  
x: 1450, 2050 2eh j2T  
"wavelength(nm)", @x U<lCK!85[  
y: 0, 0.6 :g[G&Ds8  
"cross-sections(1e-24 m&sup2;)", @y $6]7>:8mz  
frame wc5OK0|  
hx DG $._  
hy [F< Tl =  
MJ:>ZRXC E  
f: s12_Tm(x * nm) /1e-24,      !Tm3+吸收截面与波长的关系 `X7ns?  
  color = red, )!``P?3?  
  width = 3, Aa;s.:?  
  "absorption" H21\6 GY  
f: s21_Tm(x * nm) /1e-24,  !Tm3+发射截面与波长的关系 fC4 D#  
  color = blue, Z 7M%}V%  
  width = 3, De*Z UN|<  
  "emission" (mJqI)m8  
Eb<iR)e H=  
lileisgsz 2021-09-28 09:47
感谢,视频上有点看不清楚
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