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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

(* Q_.c~I}yV  
Demo for program"RP Fiber Power": thulium-doped fiber laser, WbWW=(N'd  
pumped at 790 nm. Across-relaxation process allows for efficient 7U`S9DDwq  
population of theupper laser level. ,HkhKbQ  
*)            ！（*  *）注释语句 >#U <#  
*b{lL5  
diagram shown: 1,2,3,4,5  ！指定输出图表 ]U1,NhZu  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 ;6txTcn`=  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 \g1@A"  
; 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 sg"D;b:X  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 `$SEkYdt  
; 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 ]</4#?_  
X7d.Ie  
include"Units.inc"         ！读取“Units.inc”文件中内容 }lTZq|;A  
|kNGpwpI  
include"Tm-silicate.inc"    ！读取光谱数据 &qP-x98E?  
L(n/uQ :  
; Basic fiberparameters:    ！定义基本光纤参数 eoe^t:5&  
L_f := 4 { fiberlength }      ！光纤长度 u<shhb-  
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 +]G/W  
r_co := 6 um { coreradius }                ！纤芯半径 k)K-mD``U  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 6Hbf9,vI  
)USC  
; Parameters of thechannels:                ！定义光信道 Qb't*2c%  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm !GGGh0Bj  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 Te@6N\g  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W $dp#nyP  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um CCh8?sM  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 wV[V#KpX8-  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 .83v~{n  
{I-a;XBX  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm zL},`:(.  
w_s := 7 um                          ！信号光的半径 /4 LR0`A'  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 @fH&(@  
loss_s := 0                            ！信号光寄生损耗为0 Dp*$GQ  
XCIa2Syo  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 )ozcr^  
 _7#tgZyv  
; 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 IbJ[Og^Qyu  
calc !UMo4}Y  
  begin yLz,V}  
    global allow all;                   ！声明全局变量 2>}\XKF).  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 1.0!H.>q  
    add_ring(r_co, N_Tm); ?5yH'9zE  
    def_ionsystem();              ！光谱数据函数 <@e+-$  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 U7"BlT!V\  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 N~$Zeq=  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 TA0D{  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 !-5S8b  
    finish_fiber();                                   %+xwk=%*  
  end; mheU#&|  
_MdZDhtm  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 G?ugMl}  
show "Outputpowers:"                                   ！输出字符串Output powers： @v ~ Pwr!  
show"pump:     ", P_out(pump):d3:"W"  ！输出字符串pump：和计算值（格式为3个有效数字，单位W） zd9]qo  
show"signal:   ",P_out(signal_fw):d3:"W" ！输出字符串signal：和计算值（格式为3个有效数字，单位W） wVp4c?s  
!rXcGj(k  
)t,{YGY#  
; ------------- :G`L3E&1s  
diagram 1:                   !输出图表1 ^'7C0ps+A  
IypWVr   
"Powers vs.Position"          ！图表名称 !)%>AH'  
3u4*ofjE5  
x: 0, L_f                      ！命令x: 定义x坐标范围 J`r,_)J"2  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 EDHg'q  
y: 0, 15                      ！命令y: 定义y坐标范围 *t.q m5h  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 ("?&p3];b  
frame          ！frame改变坐标系的设置 |0L=8~M(j  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） t$K@%yU2  
hx             ！平行于x方向网格 >:jM}*dnL  
hy              ！平行于y方向网格 z+k=|RMau  
v\ %B  
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 v_z..-7Dq+  
  color = red,  ！图形颜色 _hy{F%}  
  width = 3,   ！width线条宽度 ';b3Mm #  
  "pump"       ！相应的文本字符串标签 PEW4J{(W  
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 `*NO_ K  
  color = blue,     W-z90k4Z5  
  width = 3, I7fb}j`/  
  "fw signal" ou'~{-_xd  
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 M@~~f   
  color = blue, #v4LoNm  
  style = fdashed, zLsb`)!  
  width = 3, x6^l6N  
  "bw signal" :xFu_%7  
}!%JYG^!D  
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 bo@,4xw  
  yscale = 2,            ！第二个y轴的缩放比例 Q(510)  
  color = magenta, 3`A>j"  
  width = 3, U@6jOZ  
  style = fdashed, sdJ%S*)5G$  
  "n2 (%, right scale)" ebN(05ZV  
'qL5$zG  
f: 100 * n(x, 3),          ！n(x ,3) 函数是计算x位置处激活粒子数在能级3上的占比 <nWKR,  
  yscale = 2, HDmx@E.@  
  color = red, wG1y,u'  
  width = 3, M{?.hq  
  style = fdashed, yiV G ]s  
  "n3 (%, right scale)" j8GY`f#  
bMN@H\Ek  
e-X HN  
; ------------- SY-ez 91  
diagram 2:                    ！输出图表2 FR x6c  
Al7<s  
"Variation ofthe Pump Power" mZ~qG5@/F  
I-b_h5ZD6  
x: 0, 10 'K@-Z]  
"pump inputpower (W)", @x &]P"48NT  
y: 0, 10 hv* >%p  
y2: 0, 100 g(/{.%\k  
frame EM=w?T  
hx bfgz1 `u  
hy @}<"N  
legpos 150, 150 egm)a   
AL$W+')  
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 } h[>U  
  step = 5, v`JF\"}S  
  color = blue, LA-_3UJx  
  width = 3, y 'OlQ2U  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 o+nG3kRD  
  finish set_P_in(pump, P_pump_in) k$h [8l( <  
2-++i:, g  
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 `Da+75 f6v  
  yscale = 2, h#i\iK&A  
  step = 5, ![ZmV  
  color = magenta, 7K&}C;+  
  width = 3, #G_F`&  
  "population of level 2 (%, rightscale)", JqEW= 5  
  finish set_P_in(pump, P_pump_in) 8L%M<JRg~  
`)32&\  
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 $>*Yhz `  
  yscale = 2, 2i\Q@h  
  step = 5, {<2>6 _z  
  color = red, Sk:2+inU  
  width = 3, j{"z4Y4  
  "population of level 3 (%, rightscale)", '0|o`qoLzA  
  finish set_P_in(pump, P_pump_in) Cq>6rn  
*8bK')W  
z8HsYf(!  
; ------------- X7aYpt;  
diagram 3:                         ！输出图表3 OL'P]=U  
$r\"6e  
"Variation ofthe Fiber Length" )6{< i5nJ\  
t9FDU  
x: 0.1, 5 0GZq`a7[  
"fiber length(m)", @x MRfb[p3Cx  
y: 0, 10 B8T\s)fxnX  
"opticalpowers (W)", @y XphE loL  
frame /.R<,/gj  
hx !K cWH9  
hy y ,E.SB  
hQRL,?  
f: (set_L(x);P_out(signal_fw)),     ！改变光纤长度对信号光输出功率的影响 /b5>Qp  
  step = 20,             2*[QZ9U[@  
  color = blue, wv?RO*E  
  width = 3, pr tK:eGe2  
  "signal output" oFCgu{\kt  
cWMUj K/N  
;f: (set_L(x);P_out(pump)),                     ！改变光纤长度对泵浦信号输出功率的影响 [dB$U}SEj  
   step = 20, color = red, width = 3,"residual pump" k$N0lR4:p  
<8!  Tq  
! set_L(L_f) {restore the original fiber length } \'Ssn(s  
`&!k!FZY*  
4zjs!AK%  
; ------------- p[9s<lEh  
diagram 4:                                  ！输出图表4 dRW$T5dac  
tIc 7:th  
"TransverseProfiles" {u"8[@@./  
A#rh@8h+  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) |A\a4f 'G  
Vi?q>:E:  
x: 0, 1.4 * r_co /um *27*>W1  
"radialposition (µm)", @x o.m:3!RW  
y: 0, 1.2 * I_max *cm^2 a~PK pw2%  
"intensity (W/ cm&sup2;)", @y h|D0z_f  
y2: 0, 1.3 * N_Tm =2Cj,[$  
frame X(@uwX$m  
hx m&*JMA;^  
hy ]y#3@  
s@8w-]"  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 iEm ?  
  yscale = 2, ;=4Xz\2  
  color = gray, a0=WfeT  
  width = 3, O hVs#^  
  maxconnect = 1, oDn|2Sdqd  
  "N_dop (right scale)" v+G=E2Lhv  
);FS7R  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 wSEWwU[  
  color = red, %<0eA`F4  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 k&/OU:7Y  
  width = 3, ! | #83  
  "pump" :e<7d8E5n{  
"4o=,$E=  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 x79Ha,  
  color = blue, l{Dct\ #s  
  maxconnect = 1, 3djC;*,9,  
  width = 3, ? *>]")[>  
  "signal" l12{fpm  
W,XTF  
Fv74bC %  
; ------------- wE]K~y!`  
diagram 5:                                  ！输出图表5 *`_{  
0@I S  
"TransitionCross-sections" m3bCZ 9iE  
#bH_Dg5I  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) _8,()t'"  
?W>qUrZ  
x: 1450, 2050 >J9oH=S6  
"wavelength(nm)", @x M_g ?<rK  
y: 0, 0.6 3ZEB  
"cross-sections(1e-24 m&sup2;)", @y f>`dF?^6  
frame #@HF<'H}mu  
hx YNwp/Y  
hy ryB}b1`D  
[NMVoBvG  
f: s12_Tm(x * nm) /1e-24,      ！Tm3+吸收截面与波长的关系 Ae]sGU|?'  
  color = red, Rk!X]-`=  
  width = 3, }}v9 `F  
  "absorption" &>d:R_Q]  
f: s21_Tm(x * nm) /1e-24,  ！Tm3+发射截面与波长的关系 #7ohQrP  
  color = blue, |a1{ve[  
  width = 3, k:jSbbQ  
  "emission" 86]p#n_>Fv  
wLc4Dm*V  
lileisgsz 2021-09-28 09:47
感谢，视频上有点看不清楚
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