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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

(* Kk>qgi$  
Demo for program"RP Fiber Power": thulium-doped fiber laser, U%DF!~n  
pumped at 790 nm. Across-relaxation process allows for efficient cXcx_-  
population of theupper laser level. %Z[/U  
*)            ！（*  *）注释语句 &}0wzcMg  
2 dD<]  
diagram shown: 1,2,3,4,5  ！指定输出图表 AC:s4iacC  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 G'2=jHzMF  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 h ^h-pd  
; 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 bmVgTm&  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 4 l}M i  
; 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 D}/=\J/  
{!1n5a3" 1  
include"Units.inc"         ！读取“Units.inc”文件中内容 bo;pj$eR3R  
sV^h#g~Zb  
include"Tm-silicate.inc"    ！读取光谱数据 @zynqh  
~}IvY?! ;  
; Basic fiberparameters:    ！定义基本光纤参数 C^ " Hj  
L_f := 4 { fiberlength }      ！光纤长度 y)/$ge _U  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 2^ bpH%  
r_co := 6 um { coreradius }                ！纤芯半径 ' ?G[T28  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 .Spi$>v  
cL)rjty2  
; Parameters of thechannels:                ！定义光信道 =x0"6gTz>  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm id tQXwa  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 `Kc %S^C'  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W e#6&uFce  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um 8gtCY~m  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 "56?/ jF  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 aY[0A_  
l?JO8^Nn  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm #1't"R+3M  
w_s := 7 um                          ！信号光的半径 (L0 hS'  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 {#*?S>DA  
loss_s := 0                            ！信号光寄生损耗为0 rZ.a>'T4  
d0A\#H_&  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 sK 1m9  
 LbV]JP  
; 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 ^[seK)S=  
calc I4<{R  
  begin {|5$1v   
    global allow all;                   ！声明全局变量 Wt+y-ES  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 ui56<gI-  
    add_ring(r_co, N_Tm); ?St=7a(D  
    def_ionsystem();              ！光谱数据函数 4ljvoJ}xjr  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 ^?6 W<  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 XW~ BEa  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 38U5^`  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 2[LX\  
    finish_fiber();                                   W\>^[c/  
  end; GIC"-l1\  
?BDlB0jxzi  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 O& 3r*vd  
show "Outputpowers:"                                   ！输出字符串Output powers： -[f "r`  
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） Tw}?(\ya  
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） Z9"{f)T  
AY&9JSu 6  
$&=4.7Yt  
; ------------- AU\xNF3  
diagram 1:                   !输出图表1 w%8ooQ|C  
<t[Z9s$n  
"Powers vs.Position"          ！图表名称 1=/doo{^  
&N/|(<CB  
x: 0, L_f                      ！命令x: 定义x坐标范围 )4!CR/ao  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 rysP)e  
y: 0, 15                      ！命令y: 定义y坐标范围 B_."?*|w  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 q'%[[<  
frame          ！frame改变坐标系的设置 "$~}'`(]  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） _OJ0 < {E  
hx             ！平行于x方向网格 5w,lw  
hy              ！平行于y方向网格 ;z.6'EYMG  
;!l*7}5X=  
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 {WYu 0J@  
  color = red,  ！图形颜色 U^[cYTG  
  width = 3,   ！width线条宽度 <OR.q  
  "pump"       ！相应的文本字符串标签 <}28=d  
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 ~j/bCMEf!  
  color = blue,     P\q<d  
  width = 3, lBlSNDs  
  "fw signal" zj~nnfoys  
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<eq7rRe  
  color = blue, ]5} -y3  
  style = fdashed, Em~7D ]Y  
  width = 3, t4f (Y,v  
  "bw signal" bU;}!iVc]  
lfxuc7Rdla  
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 -TzI>Fz  
  yscale = 2,            ！第二个y轴的缩放比例 935-{h@k  
  color = magenta, o,S!RG&  
  width = 3, v%H"_T  
  style = fdashed, r/mA2  
  "n2 (%, right scale)" :`+|'*b(A  
<O \tC81  
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 F^.om2V|9  
  yscale = 2, Q3'fz 9v  
  color = red, V*6l6-y~Ih  
  width = 3, W<\kf4Y  
  style = fdashed, Z"6 2#VM  
  "n3 (%, right scale)" Y3vX)D}  
=d go!k  
RDUT3H6~  
; ------------- p+orBw3  
diagram 2:                    ！输出图表2 Z{Vxr*9oO  
FX%t  
"Variation ofthe Pump Power" J"%8:pL  
0zg2g!lh  
x: 0, 10 69t7=r  
"pump inputpower (W)", @x wVx,JL5Jr  
y: 0, 10 W3 De|V^  
y2: 0, 100 ]YCPyc:  
frame $T"h";M)s  
hx 1i4WWK7k  
hy *-?Wcz  
legpos 150, 150 y\^@p=e  
>F/XZ C  
f: (set_P_in(pump, x);P_out(signal_fw)), ！set_P_in(pump,x)改变泵浦信道功率；P_out(signal_fw)输出前向信号光 L/Hv4={  
  step = 5, rpUy$qrRc  
  color = blue, 6D/uo$1Y  
  width = 3, WHp97S'd  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 F(d:t!  
  finish set_P_in(pump, P_pump_in) Wu4ot0SZ  
JDkCUN5  
f: (set_P_in(pump,x); 100 * n_av(2)),   ！改变泵浦信号功率对能级2上激活粒子占比的影响 bsB},pc  
  yscale = 2, r)gCTV(kb  
  step = 5, <v]z6B@9!  
  color = magenta, ^:m^E0(H  
  width = 3, #X#8ynt  
  "population of level 2 (%, rightscale)", 8jRs =I  
  finish set_P_in(pump, P_pump_in) yC W*fIaq  
d'ZS;l   
f: (set_P_in(pump,x); 100 * n_av(3)),   ！改变泵浦信号功率对能级3上激活粒子占比的影响 ):3MYSqX  
  yscale = 2, A'Gl Cp  
  step = 5, (@+h5@J[`I  
  color = red, #S%4?   
  width = 3, 0Y7$d`  
  "population of level 3 (%, rightscale)", kB8 Mi  
  finish set_P_in(pump, P_pump_in) tE[H8  
Vr 8:nP:  
W$r^  
; ------------- #>=8w9]  
diagram 3:                         ！输出图表3 Mal<iNN  
u+m4!`  
"Variation ofthe Fiber Length" 4:D:| r  
8q0I:SJy  
x: 0.1, 5 ?{eY\I  
"fiber length(m)", @x _mXs4  
y: 0, 10 D z@1rc<B  
"opticalpowers (W)", @y 0E-pA3M6  
frame flP>@i:e6  
hx !x7o|l|cP  
hy :/6()_>bO  
COSTV>s;  
f: (set_L(x);P_out(signal_fw)),     ！改变光纤长度对信号光输出功率的影响 6a*83G,k  
  step = 20,             '99@=3AB:`  
  color = blue, \ZMP_UU(  
  width = 3, UgC)7 K1  
  "signal output" z$|;-u|  
za T_d/?J  
;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 I+|uU g5  
   step = 20, color = red, width = 3,"residual pump" T^]7R4 Fg  
?W!ry7gXO  
! set_L(L_f) {restore the original fiber length } +i.u< T  
b,Ke>.m  
ox[ .)v  
; ------------- qp>N^)>  
diagram 4:                                  ！输出图表4 K\(6 rS}N  
v5T`K=qC  
"TransverseProfiles" paWxanSt  
0Gsu  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) L+.H z&*@  
)t%h[0{{  
x: 0, 1.4 * r_co /um @r<b:?u  
"radialposition (µm)", @x $3k "WlRG  
y: 0, 1.2 * I_max *cm^2 \lEkfcc  
"intensity (W/ cm&sup2;)", @y  q>-R3HB  
y2: 0, 1.3 * N_Tm DtI$9`~  
frame 4&{!M _  
hx PO o%^'(  
hy u]M\3V.  
|@RpWp>2  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 s?c JV `  
  yscale = 2, \GL*0NJ  
  color = gray, $7NCb7%/L  
  width = 3, % :/_f  
  maxconnect = 1, SE)nD@:  
  "N_dop (right scale)" @?Zf-.  
9i=B  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 (.?ZKL  
  color = red, Od{jt7<j#  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 O~PChUU*Y  
  width = 3, fx)KNm8Lx  
  "pump" ?:igumeYX  
_TUm$#@Y`  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 !D:Jbt@R<n  
  color = blue, BpH%STEN  
  maxconnect = 1, 9I .^LZ"  
  width = 3, {kL&Rv%'  
  "signal" H)>sTST(  
.z-UOyer  
P!e=b-T  
; ------------- wL3,g2-L  
diagram 5:                                  ！输出图表5 0V`[Zgf  
3^wC<ZXcD  
"TransitionCross-sections" S6sq#kcH  
"0Q1qZ  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) ashar&'  
zN!j%T.e  
x: 1450, 2050 9v?l  
"wavelength(nm)", @x 6B6vP%H#  
y: 0, 0.6 g"K>5Cb  
"cross-sections(1e-24 m&sup2;)", @y =&vFVIhWcf  
frame 5 1dSFr<#  
hx hXB|g[zT  
hy fS=hpL6]@  
lH2wG2  
f: s12_Tm(x * nm) /1e-24,      ！Tm3+吸收截面与波长的关系 >jTp6tu,  
  color = red, wC CV2tk  
  width = 3, Vrkf(E3_V  
  "absorption"  {mTytT  
f: s21_Tm(x * nm) /1e-24,  ！Tm3+发射截面与波长的关系 \/5RL@X}  
  color = blue, f.6~x$:)`E  
  width = 3, $yu?.b 9H#  
  "emission" X2yTlLdY  
27A!\pn  
lileisgsz 2021-09-28 09:47
感谢，视频上有点看不清楚
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