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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

(* E#h~V5Tf  
Demo for program"RP Fiber Power": thulium-doped fiber laser, SgSk !lj  
pumped at 790 nm. Across-relaxation process allows for efficient Fd !iQ  
population of theupper laser level. H%.zXQ4}n  
*)            ！（*  *）注释语句 M]ap:  
Kx]> fHK  
diagram shown: 1,2,3,4,5  ！指定输出图表 Gc5VQ^]  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 :,C%01bH|l  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 iB{xvyR  
; 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 '?}R4w|)  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 0!IPcZjY7  
; 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 (@?eLJlT  
6:RMU  
include"Units.inc"         ！读取“Units.inc”文件中内容 ;F,qS0lzE  
V [4n'LcE  
include"Tm-silicate.inc"    ！读取光谱数据 y*KC*/'"  
4hNwKe"Ki  
; Basic fiberparameters:    ！定义基本光纤参数 )H+h ;U  
L_f := 4 { fiberlength }      ！光纤长度 .v7`$(T  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 "z/V%ZK~f  
r_co := 6 um { coreradius }                ！纤芯半径 eYDgEM  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 }*-u$=2  
" ~n3iNkP  
; Parameters of thechannels:                ！定义光信道 lu3.KOD/  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm z.59]\;U>  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 DrFur(=T  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W < %rh/r  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um p)z-W(  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 zW)gC9_|m-  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 a8NVLD>7}  
O"QHb|j  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm CSH`pU  
w_s := 7 um                          ！信号光的半径 ;r@!a!NLB  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 GRQ_+K  
loss_s := 0                            ！信号光寄生损耗为0 u !.DnKu  
4zX=3iBt  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 aL 8Gnqf2  
{0fz9"|U  
; 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 #ZF>WoC@e?  
calc -=>U =|  
  begin Lv3XYZgW~  
    global allow all;                   ！声明全局变量 \L %q[  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 59K}  
    add_ring(r_co, N_Tm); Rj&qh`  
    def_ionsystem();              ！光谱数据函数 [lOf|^9  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 }Qb';-+;d  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 9 c6'  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 86#-q7aX  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 *78)2)=~  
    finish_fiber();                                   bm^X!i5  
  end; qdO[d|d  
Vbo5`+NAis  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 ~r PYJ  
show "Outputpowers:"                                   ！输出字符串Output powers： 5<^'Cy  
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） EM=xd~H  
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） 44Q9* ."  
g?gqkoI  
,FY-d$3)  
; ------------- 6#O#T;f)  
diagram 1:                   !输出图表1 )ib7K1GJ  
*3P3M}3~\  
"Powers vs.Position"          ！图表名称 CQ$::;  
}E,jR=@  
x: 0, L_f                      ！命令x: 定义x坐标范围 =hPG_4#  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 "0b?+ 3_{G  
y: 0, 15                      ！命令y: 定义y坐标范围 Hw y5G ;  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 xl3zy~;M  
frame          ！frame改变坐标系的设置 q;ZLaX\bFl  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） &0JK38(  
hx             ！平行于x方向网格 hR!}u}ECd  
hy              ！平行于y方向网格 %N>\:8 5?  
yAAG2c4(  
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 ):^ '/e  
  color = red,  ！图形颜色 Yg[ v/[]  
  width = 3,   ！width线条宽度 ENO? ;  
  "pump"       ！相应的文本字符串标签 wZ$ tJQO  
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 W"dU1]  
  color = blue,     >dyhox2*"  
  width = 3, 6$;L]<$W>  
  "fw signal" {x7=;-  
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 Z(KmS (  
  color = blue, c%ZeX%p  
  style = fdashed, phr2X*Z/)Y  
  width = 3, IF5sqv  
  "bw signal" Ap% d<\,Z  
;i.I&*t  
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 xrfPZBLy  
  yscale = 2,            ！第二个y轴的缩放比例 sZ]'DH&_(  
  color = magenta, HOq4i !  
  width = 3, pF|8OB%  
  style = fdashed, B*y;>q "{U  
  "n2 (%, right scale)" IhUW=1& J  
stX'yya  
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 `'kc|!%MUq  
  yscale = 2, 09G9nu;&{  
  color = red, r@olC7&  
  width = 3, {%=S+89l  
  style = fdashed, oDz*~{BHg  
  "n3 (%, right scale)" 'G<}U343=8  
 qe[  
('T4Db  
; ------------- l8er$8S}  
diagram 2:                    ！输出图表2 jo<>Hc{g>  
tvTWZ`  
"Variation ofthe Pump Power" ,c@r` x  
'CS^2Z  
x: 0, 10 3aEt>x  
"pump inputpower (W)", @x {An8/"bv}  
y: 0, 10 ^uC"dfH  
y2: 0, 100 B{;11 u  
frame wDB)&b  
hx F#jCEq  
hy Q.r B\8ea  
legpos 150, 150 Uy(vELB  
B"7$!Co  
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 |)28=Z|Z  
  step = 5, mG>T`c|r3  
  color = blue, ,D:iQDG^  
  width = 3, yEE|e&#>  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 v;K{|zUdB  
  finish set_P_in(pump, P_pump_in) zA2UFax=  
8o!  
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 5OPS&:  
  yscale = 2, sXSj OUI  
  step = 5, <dq,y>  
  color = magenta, WA<H  
  width = 3, +F1]M2p]  
  "population of level 2 (%, rightscale)", 0\V\qAk  
  finish set_P_in(pump, P_pump_in) OI'uH$y  
bq c;.4$  
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 Bx\#`Y  
  yscale = 2, :X3rd|;kc  
  step = 5, {[l'S  
  color = red, 7'-)/Pk  
  width = 3, '}wG"0  
  "population of level 3 (%, rightscale)", $~ pr+Ei  
  finish set_P_in(pump, P_pump_in) ~+nS)4 (  
:`{9x%o;  
B=Xnv*e  
; ------------- RH<@c^ S  
diagram 3:                         ！输出图表3 K~7'@\2 ?  
1gF*Mf_7  
"Variation ofthe Fiber Length" [37f#p  
I'KR'1z 9  
x: 0.1, 5 Xulh.: N}  
"fiber length(m)", @x 1.hOE>A%  
y: 0, 10 gg lNpzj  
"opticalpowers (W)", @y P Xyyyir{  
frame |usnY  
hx ~0VwF  
hy /V#MLPA  
^% ~Et>C  
f: (set_L(x);P_out(signal_fw)),     ！改变光纤长度对信号光输出功率的影响 ==jkp U*=  
  step = 20,             h1Ke$#$6  
  color = blue, \_iH4<#>  
  width = 3, 8r7/IGFg  
  "signal output" rC=p;BC@dD  
[+ %p!T  
;f: (set_L(x);P_out(pump)),                     ！改变光纤长度对泵浦信号输出功率的影响 oN1!>S9m  
   step = 20, color = red, width = 3,"residual pump" "cnG/{($*  
f)&`mqeE  
! set_L(L_f) {restore the original fiber length } }e&KO?x+  
X}65\6  
K1m!S9d`x  
; ------------- GQYtH#  
diagram 4:                                  ！输出图表4 TE*>a5C|  
]1/W8z%  
"TransverseProfiles" :ofE8]  
,g<>`={kK+  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) hq|j C  
,iA2s i  
x: 0, 1.4 * r_co /um e3HF"v]2!  
"radialposition (µm)", @x 18[?dV  
y: 0, 1.2 * I_max *cm^2 A-AN6.  
"intensity (W/ cm&sup2;)", @y i9#`F.7F  
y2: 0, 1.3 * N_Tm _js2^<7v}  
frame K8Kz  
hx (HTk;vbZm  
hy T }8r;<P6  
1*c0\:BQ;z  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 b&|YQW} ~  
  yscale = 2, &9jUf:gJ0  
  color = gray, B?/12+sR  
  width = 3, LyCV_6;D  
  maxconnect = 1, 1*x5/b  
  "N_dop (right scale)" 2Wc;hJ.1  
X*p:&=o  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 K|Ij71  
  color = red, Poylq] F  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 %r}KvJgd  
  width = 3, S+e-b'++?  
  "pump" '%JMnU  
&H p\("  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 Wb}0-U{S'  
  color = blue, OFPd6,(E  
  maxconnect = 1, ><Mbea=U+  
  width = 3, ]i_):@  
  "signal" -*]9Ma<wa  
0ghwFo  
^*owD;]4_  
; ------------- +wf& L  
diagram 5:                                  ！输出图表5 :,J86#S)  
T_;G))q'  
"TransitionCross-sections" {F{[!.  
.Q6{$Y%l  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) !&`7  
:h](;W>H  
x: 1450, 2050 A.'`FtV  
"wavelength(nm)", @x =tvm=  
y: 0, 0.6 0I AaPz/e  
"cross-sections(1e-24 m&sup2;)", @y HDfQ9__  
frame A$Jn3Xd~!  
hx 0UAr}H.:  
hy ^Qb!k/$3y  
}M"'K2_Z  
f: s12_Tm(x * nm) /1e-24,      ！Tm3+吸收截面与波长的关系 tIp\MXkTQ&  
  color = red, h 19.b:JT  
  width = 3, HN&vk/[  
  "absorption" fPuQ,J2=  
f: s21_Tm(x * nm) /1e-24,  ！Tm3+发射截面与波长的关系 V'| g  
  color = blue, @+Anv~B.  
  width = 3, b ffml  
  "emission" 8aM% 9OU  
P$#}-15?|_  
lileisgsz 2021-09-28 09:47
感谢，视频上有点看不清楚
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