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

(* NB5lxaL  
Demo for program"RP Fiber Power": thulium-doped fiber laser, GXk |p8  
pumped at 790 nm. Across-relaxation process allows for efficient 2R ^6L@fw  
population of theupper laser level. R](ck
o=  
*)            ！（*  *）注释语句 0x<
G\ l4  
+=d
=  
diagram shown: 1,2,3,4,5  ！指定输出图表 >vR2K^  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 *yY\d.6(  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 jtq^((Ux  
; 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 =GW[UnO  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 .;S1HOHz4  
; 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 1|AY&u%fiP  
dt>9mF q  
include"Units.inc"         ！读取“Units.inc”文件中内容 yY*(!^S  
+md"X@k5*  
include"Tm-silicate.inc"    ！读取光谱数据 rVRv*W  
|f\WVGH  
; Basic fiberparameters:    ！定义基本光纤参数 Ck>]+rl  
L_f := 4 { fiberlength }      ！光纤长度 6!USSipn  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 ]>ndFE6kl  
r_co := 6 um { coreradius }                ！纤芯半径 P!IXcPKW53  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 mB6%. "  
nywC]T  
; Parameters of thechannels:                ！定义光信道 ]rNxvFN*j  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm =6f)sZpPh  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 ]"?<y s  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W -3y
  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um 9g'6zB  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 =;F7h @:  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 c4r9k-w0E  
9]lyV  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm ^QG<_Dm]  
w_s := 7 um                          ！信号光的半径 .JJ50p  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 f! )yE`4-  
loss_s := 0                            ！信号光寄生损耗为0 ]m7x&N2  
ie>mOsz  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 F-M)6&T  
hy@b/Y![M  
; 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 CN}0( 2n  
calc  p:eaZ  
  begin R3LIN-g(  
    global allow all;                   ！声明全局变量 B52dZb  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 vlipB}  
    add_ring(r_co, N_Tm); tA,J~|+f:  
    def_ionsystem();              ！光谱数据函数 Y^U^yh_!^  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 U[OUIXUi  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 ;Bw3@c  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 (ip3{d{CT]  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 ,U+>Q!$`\^  
    finish_fiber();                                   1'iQlnMO@  
  end; 3+ 2&9mm  
k,; (`L  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 CC'N"Xb  
show "Outputpowers:"                                   ！输出字符串Output powers： <b\8<mTr  
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） .7:ecF
Kk  
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） f^F"e'1  
(H:A|Lw  
j~>J?w9<O  
; ------------- 4L4u
<  
diagram 1:                   !输出图表1 =W2I0nr.  
hd[t&?{=  
"Powers vs.Position"          ！图表名称 rOj(THoc{  
I3izLi
 
x: 0, L_f                      ！命令x: 定义x坐标范围 %K7;ePu  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 Nez '1  
y: 0, 15                      ！命令y: 定义y坐标范围 :_nGh]%  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 ^gNbcWc7CU  
frame          ！frame改变坐标系的设置 0]$-}A
YM  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） -/*VR$c  
hx             ！平行于x方向网格 g:U -kK!i  
hy              ！平行于y方向网格 S
J:Teab  
sJl>evw  
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 B<$6Dj%L  
  color = red,  ！图形颜色 +qqCk  
  width = 3,   ！width线条宽度 *P5/S8c  
  "pump"       ！相应的文本字符串标签 Goy[P2m  
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 FFmXT/K"/j  
  color = blue,     ,OP\^  
  width = 3, \_i22/Et  
  "fw signal" l
H@goh  
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 1=!2|D:C)i  
  color = blue, &Fjyi"8(r  
  style = fdashed, %|f@WxNrU  
  width = 3, $BB^xJ\O  
  "bw signal" E8<,j})*  
 Bs>S2]  
f: 100 * n(x, 2),    ！n(x ,2) 函数是计算x位置处激活粒子数在能级2上的占比 xon^=Wo;  
  yscale = 2,            ！第二个y轴的缩放比例 ]@}hyM[D;  
  color = magenta, 5$X 8|Ve  
  width = 3, se}$/Y}t  
  style = fdashed, X &G]ci  
  "n2 (%, right scale)" XaoVv2=G~  
D5].^*
AbZ  
f: 100 * n(x, 3),          ！n(x ,3) 函数是计算x位置处激活粒子数在能级3上的占比 ymnK`/J!Q  
  yscale = 2, A2\3.3  
  color = red, Y`6<:8[?  
  width = 3, A_2lG!! 6  
  style = fdashed, g0s4ZI+T  
  "n3 (%, right scale)" hgwS_L  
5Fq+^  
Mpk7$=hjc  
; ------------- w_LkS/  
diagram 2:                    ！输出图表2 U7,.L  
<;jg/  
"Variation ofthe Pump Power" +@7c:CAy(  
A8AeM`  
x: 0, 10 K
F!d?  
"pump inputpower (W)", @x AXnKhYlu  
y: 0, 10 - ku8n%u  
y2: 0, 100 I).eQ8:  
frame Ywcgt|  
hx Z*v`kl  
hy c]qh)F$s8  
legpos 150, 150 ^%Ln@!P  
pE0@m-p  
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 yLl:G;  
  step = 5, X76rme  
  color = blue, [i>D|X  
  width = 3, 9'|_1Q.b^  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 -b?s\X  
  finish set_P_in(pump, P_pump_in) W*n|T{n  
vAOThj)  
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 <Skf n`).  
  yscale = 2, 0wF)bQv1  
  step = 5, PfhKomt"  
  color = magenta, qzSm]l?z  
  width = 3, ?/~Q9My  
  "population of level 2 (%, rightscale)", d4A:XNKB  
  finish set_P_in(pump, P_pump_in) YhN:t?  
)2u_c=  
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 $H/: -v  
  yscale = 2, X2P8Zq=%a  
  step = 5, ^$rqyWZYp  
  color = red, :SZi4:4-J8  
  width = 3, EYn9ln_]u  
  "population of level 3 (%, rightscale)", !QME!c>*$  
  finish set_P_in(pump, P_pump_in) 9tmnx')_  
4ZYywDwn  
^ 7)H;$  
; ------------- 8zjJshE/  
diagram 3:                         ！输出图表3 L/5th}m  
bcAk$tA2  
"Variation ofthe Fiber Length" -f?,%6(1  
ItZ*$I1<  
x: 0.1, 5 9w1`_r[J  
"fiber length(m)", @x U_UN& /f  
y: 0, 10 3 [O+wVv  
"opticalpowers (W)", @y R#rfnP >  
frame %"|W qxv  
hx \(zUI  
hy _~2o  
Ypinbej  
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 `84,R
!  
  step = 20,             ITz+O=I4R]  
  color = blue, Lg-!,Y   
  width = 3, n9Vr*RKM)  
  "signal output" y6H`FFqK  
Oz<#s{Z  
;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 z.tN<P7  
   step = 20, color = red, width = 3,"residual pump" \GK]6VW  
P\@efq@!  
! set_L(L_f) {restore the original fiber length } X"jtPYCpV{  
e=_Ng j)  
/U0,%  
; ------------- =t.T9'{  
diagram 4:                                  ！输出图表4 L9!\\U  
wb39s^n  
"TransverseProfiles" xE*.,:,&  
EbJc%%c  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) tNYuuC%N  
"cvhx/\1#  
x: 0, 1.4 * r_co /um z0&Y_Up+5  
"radialposition (µm)", @x +{%)}?F  
y: 0, 1.2 * I_max *cm^2 j&q%@%Gm  
"intensity (W/ cm&sup2;)", @y RQ8;_)%  
y2: 0, 1.3 * N_Tm E+$D$a  
frame ~CHVU3  
hx F><ficT  
hy _a
uFt"n  
U[Lr+nKo\  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 w/9%C(w6  
  yscale = 2, HI[Pf%${  
  color = gray, S.?DR3XLc  
  width = 3, #1WCSLvtV  
  maxconnect = 1, `(E$-m-~jH  
  "N_dop (right scale)" gN]\#s@[  
"kjSg7m*:  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 p@oz[017/J  
  color = red, f*Os~@K  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 P#[?Kfi  
  width = 3, bYr*rEcA  
  "pump" 1-|aeJ  
((=T E  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 =VV><^uzdY  
  color = blue, #K!"/,d@>J  
  maxconnect = 1, wEQZ9?\  
  width = 3, UtRwZ(09  
  "signal" ,}NTV~  
bL5u;iy)  
Q(x/&]7=V  
; ------------- x~](d8*=  
diagram 5:                                  ！输出图表5 fm!\**Q1  
D&qJ@PR  
"TransitionCross-sections" `]a0z|2'!  
vhDtjf/*  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) }]=@Y/p  
N*)O_Ki  
x: 1450, 2050 (k_9<Yb3  
"wavelength(nm)", @x TIK'A<  
y: 0, 0.6 F3L+X5D.yu  
"cross-sections(1e-24 m&sup2;)", @y t/l<X]o  
frame ]zn3nhBI  
hx yq[@Cw  
hy Lyit`j~yH  
~ ea K]|  
f: s12_Tm(x * nm) /1e-24,      ！Tm³⁺吸收截面与波长的关系 #aiI]'  
  color = red, l hST%3Ld  
  width = 3, ;s-@m<  
  "absorption" uQ7lC~  
f: s21_Tm(x * nm) /1e-24,  ！Tm³⁺发射截面与波长的关系 ? 51i0~O=  
  color = blue, ,5AEtoF  
  width = 3, R`B} T<*
  
  "emission" Pz0TAb  
+k[w)7Q  

感谢，视频上有点看不清楚