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

(* B`YTl~4  
Demo for program"RP Fiber Power": thulium-doped fiber laser, j >Ht@Wi  
pumped at 790 nm. Across-relaxation process allows for efficient j_/>A=OD  
population of theupper laser level. F7A=GF'  
*)            ！（*  *）注释语句 
^pxX]G]  
\j+1V1t9  
diagram shown: 1,2,3,4,5  ！指定输出图表 x`U^OLV  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 H  >j  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 bNm#tmSt  
; 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 8G9s<N}5&u  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 QaS1
Dh  
; 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 kd>hhiz|  
\<.+rqa!  
include"Units.inc"         ！读取“Units.inc”文件中内容 Vn7*JS  
1=r#d-\tR  
include"Tm-silicate.inc"    ！读取光谱数据 >/g#lS 5  
Jk&3%^P{m  
; Basic fiberparameters:    ！定义基本光纤参数 0[
A[U_b  
L_f := 4 { fiberlength }      ！光纤长度 6rh5h:  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 . kQkC:~9  
r_co := 6 um { coreradius }                ！纤芯半径 t!*?dr  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 t 4PK}>QW  
3e #p@sB  
; Parameters of thechannels:                ！定义光信道 +Um( h-;  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm 56
}U8X  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 Bs13^^hu
 
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W !_"@^?,q  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um H]P. x!I  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 *
;-*x6  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 M.Y~1c4f  
8R2QZXJb-  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm uya.sF0]9B  
w_s := 7 um                          ！信号光的半径 4Z1ST;  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 -jW.TT h]  
loss_s := 0                            ！信号光寄生损耗为0 ]@dZ{H|  
mi ik%7>W  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 ,C K{F  
]
|!OP  
; 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 uvMy^_}L  
calc :imW\@u  
  begin 2gc/3*F8  
    global allow all;                   ！声明全局变量 ,">]`|?  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 +lm{Olm'^  
    add_ring(r_co, N_Tm); 0x'#_G65y  
    def_ionsystem();              ！光谱数据函数 7/!8e.M\  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 OJ,`  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 zer%W%  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 tU4s'J  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 Ci?Ss+|  
    finish_fiber();                                   Z LB4m`  
  end; Cf TfL3(J  
!5.8]v
 
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 &wie]  
show "Outputpowers:"                                   ！输出字符串Output powers： E'G4Y-  
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） jB`,u|FG  
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） | 1E|hh@k  
#EO9UW5  
.>CPRVuVI  
; ------------- LwrUQ)  
diagram 1:                   !输出图表1 5XO;
N s  
l9}3XI.=  
"Powers vs.Position"          ！图表名称 [.m`+  
? K;dp  
x: 0, L_f                      ！命令x: 定义x坐标范围 GO8GJ;B-U  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 H
#@^R(  
y: 0, 15                      ！命令y: 定义y坐标范围 M%Ji0v38  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 @$lG@I,[  
frame          ！frame改变坐标系的设置 O?)3VT*  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） bW$J~ynM  
hx             ！平行于x方向网格 K&bzDzd`  
hy              ！平行于y方向网格 iEd\6EZ  
QFw  +cy  
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 6""G,"B  
  color = red,  ！图形颜色 ~5_Ad\n9  
  width = 3,   ！width线条宽度 {/"2Vk<H8  
  "pump"       ！相应的文本字符串标签 (0j}-iaQEZ  
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 TFH\K{DM  
  color = blue,     9)}[7Mg:C  
  width = 3, Id'X*U7Q  
  "fw signal" 0TCBQ~"  
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 K#E
vFs`s;  
  color = blue, }'"
"(,2  
  style = fdashed, ]+(6,ct&.  
  width = 3, FB
_pw!z  
  "bw signal" ' qWALu  
uZc`jNc\  
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 .P;*Dws  
  yscale = 2,            ！第二个y轴的缩放比例 f%Ns[S~r  
  color = magenta, } ~h3c
|  
  width = 3, o}W%I/s  
  style = fdashed, /]=C{)8  
  "n2 (%, right scale)" #N#
'5w-G  
eCN })An  
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 >SML"+>  
  yscale = 2, afv~r>q(-  
  color = red, #.it]Nv{  
  width = 3, IOb*GT
b  
  style = fdashed, }R1
< 0~g  
  "n3 (%, right scale)" vI2^tX9  
(^@ra$.  
bLe<G  
; ------------- |(pRaiJ  
diagram 2:                    ！输出图表2 L[^9E'L$  
U'8bdsF_  
"Variation ofthe Pump Power" lp<g\  
+s,Qmmb7)  
x: 0, 10 Pf|siC^;s~  
"pump inputpower (W)", @x ;u;#g  
y: 0, 10 f#?fxUH~  
y2: 0, 100 m1),;RsH  
frame ]F;
f`o  
hx Q7R~{5r>W  
hy f
J/e(t  
legpos 150, 150 Q,p}:e  
 '`eO\huf  
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 0/!dUWdKH  
  step = 5, oX0D
 
  color = blue, ]3VI|f$$  
  width = 3, 7bk%mQk  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 0}$Hi  
  finish set_P_in(pump, P_pump_in) ?%`@ub$  
F_;vO%}  
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 nyBJb(5"B  
  yscale = 2, &Rx{.9  
  step = 5, L%Ow#.[C2  
  color = magenta, c%&:6QniZ  
  width = 3, #gp,V#T  
  "population of level 2 (%, rightscale)", V>R8GSx  
  finish set_P_in(pump, P_pump_in) UG2nX3?  
>Y #t`6,!  
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 ^zt-HDBR_  
  yscale = 2, {jYOsl  
  step = 5, &m|wH4\  
  color = red, Sg6"WV{<  
  width = 3, c8L~S/t  
  "population of level 3 (%, rightscale)", Hz.(qW">5*  
  finish set_P_in(pump, P_pump_in) Z7_m)@%;kk  
wm)#[x #  
Ys,{8Y,7  
; ------------- &K/ya7  
diagram 3:                         ！输出图表3 qxFB%KqU  
#;%JT   
"Variation ofthe Fiber Length" HuwU0:*  
PNaay:a|  
x: 0.1, 5 'h^0HE\~p  
"fiber length(m)", @x l~6?kFy9h  
y: 0, 10  /o[?D  
"opticalpowers (W)", @y qW!]co  
frame &jsVw)Ue  
hx o(:[r@Z0z  
hy %!du,2  
dHK`eS$sb  
f: (set_L(x);P_out(signal_fw)),     ！改变光纤长度对信号光输出功率的影响 u>TZt]h8  
  step = 20,             AgFVv5  
  color = blue, u86"Y^d#  
  width = 3, \ C+(~9@|  
  "signal output" |lJX 3  
n@U n  
;f: (set_L(x);P_out(pump)),                     ！改变光纤长度对泵浦信号输出功率的影响 Xlb0/T<g!  
   step = 20, color = red, width = 3,"residual pump" q|Qk2M  
~$p2#AqX  
! set_L(L_f) {restore the original fiber length } "FTfk  
=!`j7#:  
hir4ZO%Zt  
; ------------- 2 !At2P2  
diagram 4:                                  ！输出图表4 T}"6wywM  
 ^}:#  
"TransverseProfiles" );Z1a&K5k  
#|*F1K  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) _cc#Qlw 7  
7.Z@Wr?  
x: 0, 1.4 * r_co /um Y=?yhAw  
"radialposition (µm)", @x {K9/HqH  
y: 0, 1.2 * I_max *cm^2 n84GZ5O>7  
"intensity (W/ cm&sup2;)", @y xfb]b2  
y2: 0, 1.3 * N_Tm ,(;lI
P  
frame k'#(1(xj  
hx Hd,p!_  
hy nS&3?lx9_  
tkXEHsRT  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 W2z*91$  
  yscale = 2, ]R=,5kK3  
  color = gray, RTv qls  
  width = 3, ^_
kJKM,  
  maxconnect = 1, BRk0CLr5  
  "N_dop (right scale)" ]|sAK%/  
BQ @huns3  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 wlEdt1G  
  color = red, K^B%/T]d  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 I(
'Un@hS  
  width = 3, @DZB9DDR  
  "pump" NcP.;u;`  
v{9t]s>B  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 V^\8BVw  
  color = blue, A?`jnRo=\  
  maxconnect = 1, _L@2_
#h!  
  width = 3, 1}tbH[  
  "signal" qA!]E^0*Ke  
jq+A-T}@  
1!.(4gV  
; ------------- F35#dIs`&  
diagram 5:                                  ！输出图表5 (sQr X{~  
%zSuK8kxV  
"TransitionCross-sections" 8 O67  
;q:jl~  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) J]q%gcM  
Y}[c^$S  
x: 1450, 2050 #vzEu
)Ul  
"wavelength(nm)", @x L*Me."*  
y: 0, 0.6 YS
j+\Z$(  
"cross-sections(1e-24 m&sup2;)", @y V=lfl1Ev0J  
frame 3;8!rNN  
hx Dc+'<"  
hy Zr-U&9.`  
{&"L~>/o  
f: s12_Tm(x * nm) /1e-24,      ！Tm³⁺吸收截面与波长的关系 OQ,NOiNkap  
  color = red, 3LfC{ER  
  width = 3, [xT:]Pw}  
  "absorption" RGK8'i/X  
f: s21_Tm(x * nm) /1e-24,  ！Tm³⁺发射截面与波长的关系 :Dd$i_3=  
  color = blue, gd0Vp Xf'  
  width = 3, Q7g>4GZC  
  "emission" 6:]*c[7  
;/0 Q1-  

感谢，视频上有点看不清楚