[原创]RP Fiber Power仿真设计掺铥光纤激光器代码详解 [复制链接]

(*  ^_%kE%I  
Demo for program"RP Fiber Power": thulium-doped fiber laser, M!tXN&V]  
pumped at 790 nm. Across-relaxation process allows for efficient Qo1eXM
W  
population of theupper laser level. f7'q-  
*)            ！（*  *）注释语句 ]Bm>-*@0N  
;9}pOzF1q  
diagram shown: 1,2,3,4,5  ！指定输出图表 6O22P?v  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 |/|  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 A;O~#Chvd  
; 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 Cua%1]"4w  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 U7DCx=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 fI7j):h;  
XJ0oS32_wK  
include"Units.inc"         ！读取“Units.inc”文件中内容 o8Z[+;  
q;:6_Qr  
include"Tm-silicate.inc"    ！读取光谱数据 Dr~=o%  
PccB]  
; Basic fiberparameters:    ！定义基本光纤参数 pMJ1v  
L_f := 4 { fiberlength }      ！光纤长度 Na\WZSu'"  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 NcAp_q? 4  
r_co := 6 um { coreradius }                ！纤芯半径 Hk
u!bJ  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 {q3H5csFq  
SgEBh  
; Parameters of thechannels:                ！定义光信道 R+~cl;#G6  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm vw)7 !/#  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 :SsUdIX;P  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W !8@*F  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um er.CDKD%L  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 wfjc/u9W6R  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 l6u&5[C  
HSIvWhg?p  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm _7D_72  
w_s := 7 um                          ！信号光的半径 [,aqQ6S  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 RuG-{NF{F  
loss_s := 0                            ！信号光寄生损耗为0 P(>(
K{v  
-OYDe@Wb]  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 M@thI%lR  
b`_w])Y@  
; 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 e\b`n}nC  
calc =q"eU=9  
  begin ?K@t0a
 
    global allow all;                   ！声明全局变量 SxjCwX">  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 vLO&Lpv  
    add_ring(r_co, N_Tm); !%Y~~'5 h  
    def_ionsystem();              ！光谱数据函数 mga6[E<  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 i%

#$*
 
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 \NqEw@91B  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 - /c7nF  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 SjdZyJa  
    finish_fiber();                                   .!}hhiF,Z  
  end; &l}?v@@+_  
? &zQaxD  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 XW L^  
show "Outputpowers:"                                   ！输出字符串Output powers： U4Nh  
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） !eJCM`cp  
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） MbXq`%  
r Db>&s3  
jvzBh-!  
; ------------- zEw>SP1,  
diagram 1:                   !输出图表1 {?{U,&  
PzY)"]g  
"Powers vs.Position"          ！图表名称 n$2RCQ  
w.N,)]h  
x: 0, L_f                      ！命令x: 定义x坐标范围 #ycL'T`X%  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 9zgNjjCl]  
y: 0, 15                      ！命令y: 定义y坐标范围 :o"8MZp  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 )uP[!LV[e  
frame          ！frame改变坐标系的设置 L<(VG{)Z  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） P.sg
RsL  
hx             ！平行于x方向网格 9YF$CXonE=  
hy              ！平行于y方向网格 ~k'V*ERNSj  
PG,U6c #  
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 {Ts:ZI+ 8d  
  color = red,  ！图形颜色 CQODXB^  
  width = 3,   ！width线条宽度 YYRT.U'  
  "pump"       ！相应的文本字符串标签 6(sIYZ2yq  
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"xWw/Ec  
  color = blue,     Y(GN4@`S  
  width = 3, J<JBdk  
  "fw signal" _ ^7|!(Sz  
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 Wn!G.(Jq  
  color = blue, -PAF p3w\y  
  style = fdashed, fY2wDD  
  width = 3, sXl ??UGe  
  "bw signal" 
8o)L,{yl  
m%QqmTH  
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]&!'\aUz  
  yscale = 2,            ！第二个y轴的缩放比例 JatHSW7j9  
  color = magenta, ;Mj002.\G  
  width = 3, R V!o4"\]  
  style = fdashed, !W1eUY  
  "n2 (%, right scale)" UqX1E  
SZVV40w  
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 <?$kI>Ot  
  yscale = 2, F,G,b  
  color = red, rbk<z\pc  
  width = 3, R9.HD?H@  
  style = fdashed, ZHy><=2  
  "n3 (%, right scale)" ^i<}]c_|f  
>zL|8f  
CKTrZxR"  
; ------------- p27p~b&  
diagram 2:                    ！输出图表2 ma}
}Sn)Q  
9y"TDo  
"Variation ofthe Pump Power" Ku3!*n_\  
;.Zh,cU  
x: 0, 10 jXEGSn  
"pump inputpower (W)", @x =aow d4t  
y: 0, 10 ) Ypz!  
y2: 0, 100 k)E;(
 
frame K[?R[  
hx tE!'dpG5)  
hy \7E`QY4  
legpos 150, 150 ~eo^`4O{{  
|vy]8?Ak  
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 IYNM
U\s  
  step = 5, 0|2%# E  
  color = blue, jA2ofC  
  width = 3, ci7~KewJ*  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 ?@a$!_  
  finish set_P_in(pump, P_pump_in) F7uhuqA]N  
'P/taEi=R  
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 (G5T%[/U  
  yscale = 2, Y}/jR6hK  
  step = 5, ?1m ,SK  
  color = magenta, Am7| /  
  width = 3, silp<13HN  
  "population of level 2 (%, rightscale)", 7l}~4dm2J  
  finish set_P_in(pump, P_pump_in) d]k='  
I2*oTUSik  
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 oWcACs3fB  
  yscale = 2, zjo
o{IH}  
  step = 5, L;C|ow^c  
  color = red, 9`&77+|;e  
  width = 3, ^@ UjQ9[>  
  "population of level 3 (%, rightscale)", {gIEZ{  
  finish set_P_in(pump, P_pump_in) sUda   
ocP*\NR  
wrK#lh2  
; ------------- RQ5P}A 3H  
diagram 3:                         ！输出图表3 >'0lw+a  
8g5.7{ky  
"Variation ofthe Fiber Length" E<a.LW@  
!>|`ly$6  
x: 0.1, 5 Et0&E  
"fiber length(m)", @x i-V0Lm/  
y: 0, 10 ^=#!D[xj>  
"opticalpowers (W)", @y O<iI  
frame /T#
o<D  
hx "sIN86pCs  
hy Eb7}$Ji\  
Jh(mbD  
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 wKrdcWI,Z  
  step = 20,             W["HDR  
  color = blue, T=yCN#cqQ`  
  width = 3, 0&o WfTg  
  "signal output" .6I%64m  
U:Fpj~E_w  
;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 u dUXc6U  
   step = 20, color = red, width = 3,"residual pump" q\G{]dz?R  
lzI/\%  
! set_L(L_f) {restore the original fiber length } ^B6`e^<  
.n=xbx:=  
R_~F6O^EO  
; ------------- Z0z)  
diagram 4:                                  ！输出图表4 SOYDp;j  
'iDu0LX  
"TransverseProfiles" *q[^Q'jnN  
%$\}z(G  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) nO%<;-=u\  
u4xA'X'~R  
x: 0, 1.4 * r_co /um 3_@G{O)e  
"radialposition (µm)", @x td`wNy\  
y: 0, 1.2 * I_max *cm^2 J b|mXNcL  
"intensity (W/ cm&sup2;)", @y (F_7%!g1d  
y2: 0, 1.3 * N_Tm 0YHYxn  
frame ~JT lPU'  
hx V?o&])?[  
hy $&NbLjeS  
hXBqz9
 
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 {bxhH)a'  
  yscale = 2, 2@4MC`&  
  color = gray, ir"* iL=  
  width = 3, Z^C!RSQ  
  maxconnect = 1, 2GUhV*TN  
  "N_dop (right scale)" MQhYJ01i  
yW'BrTw  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 8F.(]@NY  
  color = red, Psg +\14  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 @$_rEdwi  
  width = 3, ta2z  
  "pump" 7?*~oV
ZW  
,\Z8*Jr3Q  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 UYlJO{|a  
  color = blue, "F04c|oR<X  
  maxconnect = 1,  z, :+Oc  
  width = 3, l,ZzB,"  
  "signal"  ; \Y-  
)bF)RLZ  
ye9QTK6$,  
; ------------- {_+>"esc  
diagram 5:                                  ！输出图表5 /o~ @VF:  
CA'hvXb.  
"TransitionCross-sections" E]D4']  
cC*zj\O  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) AJdlqbd'+  
h%4~0  
x: 1450, 2050 <%T%NjNPQ  
"wavelength(nm)", @x zkw0jX~  
y: 0, 0.6 |J@|  
"cross-sections(1e-24 m&sup2;)", @y <PH3gyC  
frame P1vF{e  
hx ZhxfI?i)l  
hy Va&KIHw  
uBV^nUjS"m  
f: s12_Tm(x * nm) /1e-24,      ！Tm³⁺吸收截面与波长的关系 9QO!vx  
  color = red, ~W5>;6f\  
  width = 3, gqKC4'G0  
  "absorption" Z.Lx^h+U  
f: s21_Tm(x * nm) /1e-24,  ！Tm³⁺发射截面与波长的关系 ant-\w>}  
  color = blue, V~tu<"%  
  width = 3, .oB'ttF1  
  "emission" \:18Uoe7  
}6b7a1p  

感谢，视频上有点看不清楚