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

(* a}{! %5  
Demo for program"RP Fiber Power": thulium-doped fiber laser, *mtv[  
pumped at 790 nm. Across-relaxation process allows for efficient 4 ETVyK|  
population of theupper laser level. );LwWKa  
*)            ！（*  *）注释语句 v#G ^W  
Hn.UJ4V  
diagram shown: 1,2,3,4,5  ！指定输出图表 2J <Z4Ap  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 S?<Qa;  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 MQu6Tm H  
; 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 6Z=H>
w  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 ],4LvIPD  
; 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 Ss}0.5Bq  
upKrr  
include"Units.inc"         ！读取“Units.inc”文件中内容 ('oUcDOFTS  
)I9(WVx!]  
include"Tm-silicate.inc"    ！读取光谱数据 ^)I:82"|?  
4v$AM8/o  
; Basic fiberparameters:    ！定义基本光纤参数 HB:i0m2fJW  
L_f := 4 { fiberlength }      ！光纤长度 *4E,|IJ  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 f{oWd]eAhb  
r_co := 6 um { coreradius }                ！纤芯半径 qa6up|xUnn  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 :4d7%q  
l{g(z!  
; Parameters of thechannels:                ！定义光信道 .(ir2g  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm 3dLz=.=)'  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 '@P[fSQ  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W <NO~TBHF  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um p,/^x~m3a  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 nm.d.A/]Z  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 HVpaVM  
6iC:l%|u  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm !NtY4O/  
w_s := 7 um                          ！信号光的半径 1F/&Y}X  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 ,5,4Qf7  
loss_s := 0                            ！信号光寄生损耗为0 =\.
|'  
m`cG&Ar5  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 2)YLs5>W%  
b :
00w["  
; 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 mLSAi2Y  
calc 511q\w M  
  begin `1gsrHi4N  
    global allow all;                   ！声明全局变量 mUxD.;P  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 y-mmc}B>N  
    add_ring(r_co, N_Tm); 7_,X9^z  
    def_ionsystem();              ！光谱数据函数 ;d4_l:9p  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 kCV OeXv  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 ;a"Ukh  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 Uan;}X7@  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 ececN{U/  
    finish_fiber();                                   4
m:E:zVn  
  end; %k_JLddlW  
n>'}tT)U  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 p*Cbe\  
show "Outputpowers:"                                   ！输出字符串Output powers： e[n>U@  
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） R0WJdW#  
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） 9^n ]qg^  
H{8\<E:V+}  
p5\b&~ g  
; ------------- LCtm@oN  
diagram 1:                   !输出图表1 ?a% u=G  
{<lV=0]  
"Powers vs.Position"          ！图表名称 'E9jv4E$n  
"F&uk~ b$  
x: 0, L_f                      ！命令x: 定义x坐标范围 eM}Xn^}  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 Tym!7H2  
y: 0, 15                      ！命令y: 定义y坐标范围 J{Jxb1:c  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 (Jm_2CN7X  
frame          ！frame改变坐标系的设置 3c)LBM  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） .gB*Y!c7  
hx             ！平行于x方向网格 7K~=QEc  
hy              ！平行于y方向网格 0(n/hJ  
b3ZPlLx6  
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 51A>eU|  
  color = red,  ！图形颜色 &^Io\  
  width = 3,   ！width线条宽度 <_5z^@N3$  
  "pump"       ！相应的文本字符串标签 Kxq~,g=t  
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 fqi584  
  color = blue,     @m6E*2Gg  
  width = 3, :\ S3[(FV  
  "fw signal" |b@-1  
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 y(HR1vQ;Z  
  color = blue, OtJS5
A  
  style = fdashed, li'#< "R?'  
  width = 3, j JW
0a\0  
  "bw signal" +ad 2  
W\"cp[b  
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 7Y-GbG.'  
  yscale = 2,            ！第二个y轴的缩放比例 xk,E A U  
  color = magenta, 5%9
& 7  
  width = 3, 0F"xU1z,  
  style = fdashed, ^vzNs>eJ  
  "n2 (%, right scale)" d(tq;2-  
qVf~\H@  
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 GB0] |z5  
  yscale = 2, a 3HS!/  
  color = red, 'vXrA  
  width = 3, R +k\)_F  
  style = fdashed, [p(Y|~  
  "n3 (%, right scale)" ,E_hG3}}  
wFh{

\  
h5~tsd}OU  
; ------------- A&z  
diagram 2:                    ！输出图表2  @>B
FhH  
j0Q;OKu  
"Variation ofthe Pump Power" | #,b1|af  
B!,})F$x  
x: 0, 10 rVkHo*Q  
"pump inputpower (W)", @x :g Ze>  
y: 0, 10 b*$^8%  
y2: 0, 100 _r&#Snp  
frame R\iU)QP  
hx >8ePx,+!  
hy J=() A+  
legpos 150, 150 hNQ,U{`;^  
K]RkKMT,  
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 L./
UgeZ  
  step = 5, rK];2[U  
  color = blue, zdr?1=  
  width = 3, ifuVVFov  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 %hY+%^k.  
  finish set_P_in(pump, P_pump_in) tL D.e  
+&|WC2#  
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 1<lLE1fk  
  yscale = 2, J|s4c`=  
  step = 5, 55Jk "V#8  
  color = magenta, U|,VH-#  
  width = 3, 3dXyKi  
  "population of level 2 (%, rightscale)", " 4s,a  
  finish set_P_in(pump, P_pump_in) m|'TPy  
fuQ?@F  
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 ++xEMP)  
  yscale = 2, &}rh+z  
  step = 5, HdVGkv/  
  color = red, *K!V$8k=99  
  width = 3, ,rQznE1e  
  "population of level 3 (%, rightscale)", "",V\m  
  finish set_P_in(pump, P_pump_in) Up`zVN59.  
ky,+xq  
<UeO+M(  
; ------------- ceAK;v o  
diagram 3:                         ！输出图表3 V"gnG](2l  
|FH/Q-7[  
"Variation ofthe Fiber Length" A2]N :=  
]
kR 93  
x: 0.1, 5 +,If|5>(  
"fiber length(m)", @x 'H:lR1(,  
y: 0, 10 Z?X ^7<  
"opticalpowers (W)", @y pS9CtQqvgy  
frame B2VUH..am  
hx jRzR`>5  
hy &`{%0r[UD#  
jP
hOk>m  
f: (set_L(x);P_out(signal_fw)),     ！改变光纤长度对信号光输出功率的影响 8\/E/o3  
  step = 20,             R|`}z"4C  
  color = blue, om|
M=/^  
  width = 3, ACc.&,!IZ  
  "signal output" .BuY[,I+  
C^]bXIb  
;f: (set_L(x);P_out(pump)),                     ！改变光纤长度对泵浦信号输出功率的影响 ,0;E_i7  
   step = 20, color = red, width = 3,"residual pump" UEt#;e  
W.{#Pg1Da  
! set_L(L_f) {restore the original fiber length } -_v[oqf$  
F(:+[$)  
Gb\}e}TB[  
; ------------- Q lql(*  
diagram 4:                                  ！输出图表4 -
fn["R]  
H;%a1  
"TransverseProfiles" xqX~nV#TB  
%.[t(F  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) $D1Pk  
1P@&xcvS\  
x: 0, 1.4 * r_co /um =#SKN\4  
"radialposition (µm)", @x U5%EQc-"P  
y: 0, 1.2 * I_max *cm^2 e%o6s+"  
"intensity (W/ cm&sup2;)", @y BB>3Kj:|  
y2: 0, 1.3 * N_Tm VWaI!bK  
frame p~En~?<  
hx mS6L6)] S  
hy j8YMod=  
fo^M`a!va0  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 26&^n Uy  
  yscale = 2, +kmPQdO;*/  
  color = gray, 32:q'
 
  width = 3, A{Jv`K  
  maxconnect = 1, A7 E*w  
  "N_dop (right scale)" 4L(axjMYU  
mM&H;W  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布
V.>'\b/#  
  color = red, IX,/ZOZ|  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 o *S"`_  
  width = 3, x?VX,9;j  
  "pump" <{JHFU`^  
J#!:Z8b  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 fYl$$.  
  color = blue, W:ih#YW_F  
  maxconnect = 1, It!PP1$   
  width = 3, j"7 z  
  "signal" OIe {Sx{y  
!Z`~=n3bk  
ebcGdC/%>  
; ------------- ZjF$zVk  
diagram 5:                                  ！输出图表5 "
9>~O`l,  
h)~KD%  
"TransitionCross-sections" EL;IrtU  
]Jq1b210  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) u yzc"di  
Ky[/7S5E  
x: 1450, 2050 =;9Wh!{  
"wavelength(nm)", @x g~S>_~WL  
y: 0, 0.6 i-vhX4:bd  
"cross-sections(1e-24 m&sup2;)", @y MLG%+@\  
frame XTUxMdN  
hx z;xp1t@  
hy DyD#4J)E  
c5+oP j  
f: s12_Tm(x * nm) /1e-24,      ！Tm³⁺吸收截面与波长的关系 tz4MT_f  
  color = red, ICN>8|O`&  
  width = 3, 7%c9 nY  
  "absorption" By]XD~gcP  
f: s21_Tm(x * nm) /1e-24,  ！Tm³⁺发射截面与波长的关系 T2AyQ~5~  
  color = blue, }5z6b>EI9a  
  width = 3, FVPhk2  
  "emission" 3?|Fn8dQR.  
(_^g:>)Cs  

感谢，视频上有点看不清楚