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

(* NRM=0-16u$  
Demo for program"RP Fiber Power": thulium-doped fiber laser, ?J<V-,i  
pumped at 790 nm. Across-relaxation process allows for efficient t@`w}o[#  
population of theupper laser level. (W~')A"hC'  
*)            ！（*  *）注释语句 @nuMl5C-`  
=q%Q^  
diagram shown: 1,2,3,4,5  ！指定输出图表 }'y=JV>l
 
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 JFyw,p&xB  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 %q~
YJ*\  
; 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 5u<F0$qHc  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 ^*{:;F@  
; 5:"Transition Cross-sections"    ！不同波长的跃迁横截面，横坐标波长，纵坐标为横截面 xIN&>D'|N  
!&$uq|-  
include"Units.inc"         ！读取“Units.inc”文件中内容 ,-11w7y\  
{
W[OjPC~F  
include"Tm-silicate.inc"    ！读取光谱数据 mM> L0  
XA&Vtgu  
; Basic fiberparameters:    ！定义基本光纤参数 %[<@$qP  
L_f := 4 { fiberlength }      ！光纤长度 5cv&`h8uo_  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 'UY
xVh9D  
r_co := 6 um { coreradius }                ！纤芯半径 ScgaWJ  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 m5wfQ_}}ss  
*kmD/J  
; Parameters of thechannels:                ！定义光信道 % Rv;e  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm b"lzR[X,e  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 $Z{ap  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W Ej\Me  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um Y ,Iv<Hg  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 m#\I&(l+  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 (;9-8Y&_d  
LFzL{rny!U  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm x6i7x"  
w_s := 7 um                          ！信号光的半径 ^V1.Y  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 9hJlc
  
loss_s := 0                            ！信号光寄生损耗为0 U?bQBHIC  
~HFqAOr  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 Ihd{@6m  
{Dc{e5K  
; 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 <}\!FuC  
calc 0tL#-47  
  begin sew0n`d1  
    global allow all;                   ！声明全局变量 \jkMnS6FvL  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 HX;JO[0  
    add_ring(r_co, N_Tm); b"DV8fdX  
    def_ionsystem();              ！光谱数据函数 {Wi)
/B}  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 Ft<6`C  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 >@Nn_d  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 'n>v}__&|  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 5~,/VV  
    finish_fiber();                                   jkVX>*.|oy  
  end; \ah.@s  
aUGRFK_6$  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 }nsxo5WP  
show "Outputpowers:"                                   ！输出字符串Output powers： lYF~CNvE  
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） 'lsG?  
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） 4x2 ;@Pd  
S'h{["P~ 0  
Vr<eU>W  
; ------------- r1jsw j%7  
diagram 1:                   !输出图表1 z]twh&^1L  
?2q;`Nb  
"Powers vs.Position"          ！图表名称 %KkMWl&:  
{:63% j  
x: 0, L_f                      ！命令x: 定义x坐标范围 tL#]G?0d  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 `y^tCJ2u*  
y: 0, 15                      ！命令y: 定义y坐标范围 N!{waPbPi  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 <o aVI?  
frame          ！frame改变坐标系的设置 x%Fy1.  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） ![ce=9@t<  
hx             ！平行于x方向网格 CJ~gE"  
hy              ！平行于y方向网格 oEuV&m|yX  
\FL`b{!+ N  
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 ;X zfd  
  color = red,  ！图形颜色 X!AD]sK  
  width = 3,   ！width线条宽度 [PhT zXt  
  "pump"       ！相应的文本字符串标签 !eC]=PoY  
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 M>yt\qbkA  
  color = blue,     )LdS1%  
  width = 3, q83!PI  
  "fw signal" O$K?2-  
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 V6CRl&ZKO  
  color = blue, ;bMmJ>[l-  
  style = fdashed, |4_[wX r  
  width = 3, `J26Y"]P  
  "bw signal" \Wn0,%x2  
TwT@_
~IM  
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 ar%!h~  
  yscale = 2,            ！第二个y轴的缩放比例 }vXf}2C  
  color = magenta, H!
81Pq~  
  width = 3, n a3st*3V_  
  style = fdashed, a9sbB0q-K@  
  "n2 (%, right scale)" ?j:g.a+U  
Q2 S!}A  
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 % k}+t3aF  
  yscale = 2, b-"kcl
K  
  color = red, OngUZMgdb  
  width = 3, xV+cX*4h  
  style = fdashed, +*')0I
 
  "n3 (%, right scale)" LPRvzlY=  
q(nPI  
sq;nUA=  
; ------------- d,:3;:CR  
diagram 2:                    ！输出图表2 r/e} DYL&  
5_yu4{@;y  
"Variation ofthe Pump Power" rF:l
+I]  
_enS_R  
x: 0, 10 FhAYk  
"pump inputpower (W)", @x a?NoNv)&  
y: 0, 10 FDQP|,  
y2: 0, 100 tT`{xM  
frame rJ^*8C!  
hx SbX#$; ks~  
hy k "Qr  
legpos 150, 150 0/~20KD{s  
6qYK"^+xu  
f: (set_P_in(pump, x);P_out(signal_fw)), ！set_P_in(pump,x)改变泵浦信道功率；P_out(signal_fw)输出前向信号光 3$#=*Zp  
  step = 5, FC&841F  
  color = blue, .{t]Mc  
  width = 3, -S
6^D/(;  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 9_&N0>OF  
  finish set_P_in(pump, P_pump_in) J!"#N}[  
8v12<ktR`  
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 032PR;]  
  yscale = 2, k>W}9^ cK  
  step = 5, Cz)/Bq  
  color = magenta, tFrNnbmlQ  
  width = 3, AY)R2> fW%  
  "population of level 2 (%, rightscale)", N&YQZ^o  
  finish set_P_in(pump, P_pump_in) dxk~  
i^_?C5  
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 dkI(&/  
  yscale = 2, ^sb+|b  
  step = 5, &$<7]a\dM  
  color = red, UkzLUok]U  
  width = 3, >@
+ r|  
  "population of level 3 (%, rightscale)", *If]f0?%  
  finish set_P_in(pump, P_pump_in)
/`H{n$  
ki<4G  
Z0!yTM/C  
; ------------- a&)4Dv0  
diagram 3:                         ！输出图表3 ^QbaMX  
9Lp[y%{GP  
"Variation ofthe Fiber Length" sA1 XtO<&7  
nX\Q{R2  
x: 0.1, 5 M7. fz"M  
"fiber length(m)", @x K
sFkC=  
y: 0, 10 2& ZoG%)  
"opticalpowers (W)", @y H;kk:s'  
frame s3+6Z~g'B  
hx ~9h/{$  
hy yIG*  
=Xu(Js-  
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 -$@4e|e%a  
  step = 20,             GkYD:o=qx  
  color = blue, Zzea  
  width = 3, jdW#; ]7+y  
  "signal output" b_%W*Q  
\L4+Dv<z  
;f: (set_L(x);P_out(pump)),                     ！改变光纤长度对泵浦信号输出功率的影响 03^?+[C  
   step = 20, color = red, width = 3,"residual pump" _;8+L\  
fNNi
k7  
! set_L(L_f) {restore the original fiber length } ^eHf'^Cvvu  
,W:Bh$%  
}\wTV*n`X  
; ------------- n1+,Pe*)  
diagram 4:                                  ！输出图表4 jSMs<ox  
3E`poE  
"TransverseProfiles" y jQpdO  
= }6l.9  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) 81&5g'  
 EWn\]f|  
x: 0, 1.4 * r_co /um m~U2L  
"radialposition (µm)", @x XJ9l,:c,  
y: 0, 1.2 * I_max *cm^2 [/Ya4=C@  
"intensity (W/ cm&sup2;)", @y w$)E#|i  
y2: 0, 1.3 * N_Tm GFmVR2z_+  
frame `|
d&ta[{  
hx xK;WJm"  
hy L7 f'  
WTZr{)e  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 +'fdAc:5',  
  yscale = 2, 'l`T(_zL\%  
  color = gray, =`y.L5  
  width = 3, :.%Hu9=GL  
  maxconnect = 1, q"%;),@  
  "N_dop (right scale)" "J(7fL$!  
?iQA>P9B  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 UB&)U\hn  
  color = red, 2 bQC2  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 FMBzTD  
  width = 3, +w'{I`QIL0  
  "pump" Gkq<?q({t  
]&kzIxh  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 Vg^@6zU  
  color = blue, \JX.)&> -  
  maxconnect = 1, ob3Z I  
  width = 3, kH10z~(e  
  "signal" \%ZF<sVW  
|Y42ZOK0  
v4V|j<R  
; ------------- V6{P41_  
diagram 5:                                  ！输出图表5 C)Ez>~Z  
/92m5p  
"TransitionCross-sections" B U^3Ux$  
TtaVvaz~>  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) V/jEMJNks  
K[(h2&  
x: 1450, 2050 .sk$@Q  
"wavelength(nm)", @x _Xn[G>1  
y: 0, 0.6 *0aU(E#  
"cross-sections(1e-24 m&sup2;)", @y zFtRsa5+  
frame 8}0O @ wq  
hx R;*3";+v|:  
hy k_c8\::p#  
i1#\S0jN  
f: s12_Tm(x * nm) /1e-24,      ！Tm³⁺吸收截面与波长的关系 8yDu(.Q  
  color = red, I}aiy.l  
  width = 3, f9Hm2wV  
  "absorption" XdDy0e4{%<  
f: s21_Tm(x * nm) /1e-24,  ！Tm³⁺发射截面与波长的关系 T"2D<7frbo  
  color = blue, p^U:O&U(  
  width = 3, |<n+6  
  "emission" e Ert_@}  
.d;XLS~  

感谢，视频上有点看不清楚