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

(* 7dN]OUdi  
Demo for program"RP Fiber Power": thulium-doped fiber laser, D3BX[  
pumped at 790 nm. Across-relaxation process allows for efficient :|P"`j  
population of theupper laser level. i^="*t\i  
*)            ！（*  *）注释语句 V?%>Ex$  
x4Eq5"F7}  
diagram shown: 1,2,3,4,5  ！指定输出图表 H=7d
p%b"  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 `7+?1z  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 4Uz6*IQNl  
; 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 '$l*FWOEal  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 }?8K
Fe7U  
; 5:"Transition Cross-sections"    ！不同波长的跃迁横截面，横坐标波长，纵坐标为横截面 u~% m(  
(w4#?_  
include"Units.inc"         ！读取“Units.inc”文件中内容 dYk)RX`}7!  
Xs*~[k'  
include"Tm-silicate.inc"    ！读取光谱数据 G2rxr  
2.?:[1g!  
; Basic fiberparameters:    ！定义基本光纤参数 I0GL/a4s  
L_f := 4 { fiberlength }      ！光纤长度 ,_P(!7Z8  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 ,T"(97"  
r_co := 6 um { coreradius }                ！纤芯半径 Sr%~ 5Q[W  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 >aN@)=h}  
t55CT6Se  
; Parameters of thechannels:                ！定义光信道 {I`B?6K5  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm 7A7K:,c  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 l AE$HP'o  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W [Zi\L>PHO  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um K.*zqQKlI|  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 '^lrGO6 z7  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 hW _NARA  
)QFT$rmX  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm !Wn'Ae9  
w_s := 7 um                          ！信号光的半径 &Lk@Xq1  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 5N`g  
loss_s := 0                            ！信号光寄生损耗为0 q{n~s=  
UyTq(7uo  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 7q$9\RR5  
W>;AMun  
; Function for defining themodel:   ！定义模型函数，一定要有calc命令，否则函数只会被定义，但不会被执行 Z37Z  
calc K,+`td#  
  begin z}OY'}sk8  
    global allow all;                   ！声明全局变量 aN%t>*?Xa  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 4$SW~BpQ  
    add_ring(r_co, N_Tm); H*;J9{  
    def_ionsystem();              ！光谱数据函数 G@ed2T  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 tj{rSg7{  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 (:M6*RV  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 V4/eGh_T  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 69O?sIk  
    finish_fiber();                                   ~'v^__8  
  end; @b-?KH  


S#2'Jw  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 L$lo5  
show "Outputpowers:"                                   ！输出字符串Output powers： F2>o"j2  
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） T*|?]k 8@*  
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） AUzJ:([V  
'00DUUa  
BRD>q4w  
; ------------- nLdI>c9R  
diagram 1:                   !输出图表1 in(n[K  
khc5h^0  
"Powers vs.Position"          ！图表名称 )1lYfJ  
9FH=Jp  
x: 0, L_f                      ！命令x: 定义x坐标范围 G4=%<+
  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 6;[iX`LL  
y: 0, 15                      ！命令y: 定义y坐标范围 ?HZ+fS,-  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 E2!;W8M  
frame          ！frame改变坐标系的设置 >SSF:hI"J  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） Ca?pK_Y  
hx             ！平行于x方向网格 3Mr)oM<Q  
hy              ！平行于y方向网格 3U1xKF  
ikyvst>O  
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 Z+I[  
  color = red,  ！图形颜色 @iao"&  
  width = 3,   ！width线条宽度 k. px  
  "pump"       ！相应的文本字符串标签 }SUe 4r&4}  
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 EDL<J1%  
  color = blue,     f<0-'fGJd  
  width = 3, +!.=M8[  
  "fw signal" > YN<~z-  
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 y4P mL  
  color = blue, V"T;3@N/4  
  style = fdashed, =Lp0i9c  
  width = 3, G)'cd D1  
  "bw signal" {Qlvj.Xw  
/$+ifiFT  
f: 100 * n(x, 2),    ！n(x ,2) 函数是计算x位置处激活粒子数在能级2上的占比 oAvL?2  
  yscale = 2,            ！第二个y轴的缩放比例 LT:KZ|U9  
  color = magenta, &ATjDbW*(  
  width = 3, wzP>Cq  
  style = fdashed, ]UFf-  
  "n2 (%, right scale)" |w:7).P  
`Z/"Dd;F^3  
f: 100 * n(x, 3),          ！n(x ,3) 函数是计算x位置处激活粒子数在能级3上的占比 'rq [P",  
  yscale = 2, gd/W8*NFR  
  color = red, tw\/1wa.  
  width = 3, z`f1|Ok  
  style = fdashed, m:X;dcq'3  
  "n3 (%, right scale)" 'OkF.bs  
wArNWBM  
#{i\t E  
; ------------- J"I{0>@  
diagram 2:                    ！输出图表2 pkBmAJb@  
]7c715@  
"Variation ofthe Pump Power" ECU:3KH>MF  
70*Y4'u}A  
x: 0, 10 /d8PDc"  
"pump inputpower (W)", @x H.!M_aJH  
y: 0, 10 *jf (TIU  
y2: 0, 100 FW=oP>f]w  
frame :2K0/@<x  
hx p
PeS4$Y  
hy </qXKEu`_  
legpos 150, 150 ks 3<zW(  
[fO \1J  
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 lE$X9yIt  
  step = 5, Hco[p+  
  color = blue, <Cn-MOoM  
  width = 3, ewY+a ,t  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 hPD2/M  
  finish set_P_in(pump, P_pump_in) 0.t;i4  
W@#)8];>  
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 R279=sO,J  
  yscale = 2, /_aFQ>.4n  
  step = 5, l9#M`x9  
  color = magenta, 1Cp5a2{  
  width = 3, 3%!d&j>v  
  "population of level 2 (%, rightscale)", |brl<*:  
  finish set_P_in(pump, P_pump_in) b!ot%uZZ  
([tbFI}A  
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 f!0*^d  
  yscale = 2, yC6XO&:g  
  step = 5, Lc0^I<Y  
  color = red, ~48Uch\LG:  
  width = 3, |4ONGU*`E  
  "population of level 3 (%, rightscale)", bC)diC  
  finish set_P_in(pump, P_pump_in) [bH6>{3u  
2c_#q1/Z/  
Ej8EQ%P  
; ------------- N3 07lGb  
diagram 3:                         ！输出图表3 SWPr5h  
$Rd74;edn  
"Variation ofthe Fiber Length" k0!b@ c  
Z&
/bp1  
x: 0.1, 5 pRc@0^G  
"fiber length(m)", @x v; &-]ka  
y: 0, 10 *";,HG?|Iz  
"opticalpowers (W)", @y 3-Xum*)Y  
frame Mw*R~OX  
hx rRly0H  
hy _Cj u C`7  
V)f/umT%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 j%#n}H  
  step = 20,             o!gl :izb  
  color = blue, ~4`LOROC  
  width = 3, u-f_,],p  
  "signal output" ZlUd^6|:3  
p4*VE5[?_+  
;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+kDx=T!  
   step = 20, color = red, width = 3,"residual pump" NYm2fFPc  

E,>/6AU  
! set_L(L_f) {restore the original fiber length } @K3<K(  
.FtW$Y~y  
E#Smi507p  
; ------------- fnN"a Z  
diagram 4:                                  ！输出图表4 =*~]lz__M  
R%"wf   
"TransverseProfiles" 9EIHcUXe  
&CV%+  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) 
j7?53e  
+DY%Y `0  
x: 0, 1.4 * r_co /um 4ac2^`  
"radialposition (µm)", @x 5<0&y3  
y: 0, 1.2 * I_max *cm^2 jn&[=Y-  
"intensity (W/ cm&sup2;)", @y t$m268m~  
y2: 0, 1.3 * N_Tm xrFFmQ<_W  
frame XkDjA#nx`  
hx "W?<BpV~@!  
hy Mm;kB/1  
/EZF5_`bT  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 :,h47'0A  
  yscale = 2, /bjyV]N  
  color = gray, w4\b^iJz  
  width = 3, n{s `XyH  
  maxconnect = 1, p-POg%|&<  
  "N_dop (right scale)" }te\) Yk.N  
a^hDxeG  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 F4xYfbwY"]  
  color = red, Ghs{B8  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 _DnZ=&=MA  
  width = 3, xc7Wk&{=  
  "pump" D(yU:^L  
{dM18;  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 ae`*0wbv  
  color = blue, 0>} FNRC  
  maxconnect = 1, t:B~P,r  
  width = 3, \dO9nwa?  
  "signal" TcPYDAa  
/>=)=CGv;  
%JF.m$-  
; ------------- 2Z;wU]  
diagram 5:                                  ！输出图表5 g <S&sYF5  
q+<X*yC  
"TransitionCross-sections" H`odQkZ!  
e<2?O  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) P1tc*2Z  
Wnm?a!j5  
x: 1450, 2050 Nj4=  
"wavelength(nm)", @x M S$^m2  
y: 0, 0.6 Y3KKskhLx  
"cross-sections(1e-24 m&sup2;)", @y ?:73O`sX:  
frame BQmH
Yar  
hx r%QTUuRXC3  
hy 29p
`G1n  
gmtp/?>e  
f: s12_Tm(x * nm) /1e-24,      ！Tm³⁺吸收截面与波长的关系 =aR'S\<  
  color = red, 2Hl0besm  
  width = 3, "& h;\hL  
  "absorption" "|ZC2Zu<  
f: s21_Tm(x * nm) /1e-24,  ！Tm³⁺发射截面与波长的关系 rG)K?B~  
  color = blue, /qM:;:N%
j  
  width = 3, @AET.qGC  
  "emission" >1u!(-A  
-]HPDN,OB  

感谢，视频上有点看不清楚