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

(* =QXLr+ y@  
Demo for program"RP Fiber Power": thulium-doped fiber laser, Uv?s<  
pumped at 790 nm. Across-relaxation process allows for efficient `&xo;Vnc  
population of theupper laser level. OLp;eb1g  
*)            ！（*  *）注释语句 G41 gil6k  
5RD\XgyN]  
diagram shown: 1,2,3,4,5  ！指定输出图表 b.V\EOk  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 )D?\ru H  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 4 qM
O@E_  
; 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 f Glvx~  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 tCH4-~,#  
; 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 "5Orj*{  
p
 w(eWP  
include"Units.inc"         ！读取“Units.inc”文件中内容 Qvo(2(  
szW_cjS  
include"Tm-silicate.inc"    ！读取光谱数据 Jv(9
w[  
+s?0yH-%p  
; Basic fiberparameters:    ！定义基本光纤参数 _EMq"
\ND  
L_f := 4 { fiberlength }      ！光纤长度
M5DQ{d<r  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 ~u|k1  
r_co := 6 um { coreradius }                ！纤芯半径 "|<6bA  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 ?`T< sk8c  
7 $AEh+f  
; Parameters of thechannels:                ！定义光信道 L7oLV?k  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm CZaUrr  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 (s`oJLW>  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W Teq1VK3Hr  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um 5MUM{(C  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 3>LyEXOW  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 d67Q@')00  
k+Ew+j1_  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm
n/*BK;  
w_s := 7 um                          ！信号光的半径 v[4A_WjT  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 Zqwxi1  
loss_s := 0                            ！信号光寄生损耗为0 e_m
UO"  
m]LR4V6k|  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 {@j0?s  
: V16bRpjL  
; 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 ukM11LD5x  
calc 022nn-~  
  begin l-|hvv5g  
    global allow all;                   ！声明全局变量 ia=eFWt.  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 OT-!n  
    add_ring(r_co, N_Tm); AL*P2\8  
    def_ionsystem();              ！光谱数据函数 JBX#U@k>I  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 FnkB z5D  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 =~;SUO  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 $@]tTz;b  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 Lbb{z  
    finish_fiber();                                   v4_p3&aj  
  end; S<), ,(  
F<SCW+>z2a  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 qm30,$\c`~  
show "Outputpowers:"                                   ！输出字符串Output powers： X;$g7A  
show"pump:     ", P_out(pump):d3:"W"  ！输出字符串pump：和计算值（格式为3个有效数字，单位W） !YUMAp/  
show"signal:   ",P_out(signal_fw):d3:"W" ！输出字符串signal：和计算值（格式为3个有效数字，单位W） ERSo&8  
YbS$D  
="%nW3e@  
; ------------- BGAqg=nDV  
diagram 1:                   !输出图表1 )C>4?)  
qf7:Q?+.|  
"Powers vs.Position"          ！图表名称 S0X%IG  
%C&HR2  
x: 0, L_f                      ！命令x: 定义x坐标范围 iCA!=%M@D  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 B_;W!  
y: 0, 15                      ！命令y: 定义y坐标范围 P_:A%T  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 `dB!Ia|  
frame          ！frame改变坐标系的设置 @ s   
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） yO@KjCv"  
hx             ！平行于x方向网格 cW+6Emh  
hy              ！平行于y方向网格 9Z! j
 
G/Ll4 :  
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 :^ 9sy  
  color = red,  ！图形颜色  XL@Y!  
  width = 3,   ！width线条宽度 |Ld/{&Qr  
  "pump"       ！相应的文本字符串标签 [Yt!uhww  
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 :4o08M%  
  color = blue,     KIt:ytFx  
  width = 3, \9[_*  
  "fw signal" v0pyyUqS  
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 !@ERAPuk  
  color = blue, f<!3vA
h  
  style = fdashed, I%dFVt@  
  width = 3, V*an0@  
  "bw signal" 8u+FWbOl]  
HS1Gy/6'  
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 "BN-Jvb7q  
  yscale = 2,            ！第二个y轴的缩放比例 JzhbuWwF-  
  color = magenta, [X >sG)0S~  
  width = 3, YS$?Wz  
  style = fdashed, 1$cX`D`  
  "n2 (%, right scale)" qw]:oh&G  
1PwqWg-\\  
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 ppv/A4Kv  
  yscale = 2, eUiJl6^x  
  color = red, 5)=XzO0  
  width = 3, Vf Jpiv1  
  style = fdashed, P\"|b\O1  
  "n3 (%, right scale)" FScE3~R  
YHoj^=/b  
lYZ5FacqC  
; ------------- ,^dyS]!d$  
diagram 2:                    ！输出图表2 a-I3#3VJ@  
_ZgIm3p0A  
"Variation ofthe Pump Power" ] i;xeo,  
d1=kHU4_9  
x: 0, 10 E1,Sr?'  
"pump inputpower (W)", @x f< A@D"m/  
y: 0, 10 ?sb Ob  
y2: 0, 100 idL6*%M  
frame >eHSbQu/Bu  
hx D
;@*  
hy }*+?1kv  
legpos 150, 150 (h8M  
5w:   
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 oH/6  
  step = 5, a<CN2e_Z  
  color = blue, &<</[h/B/F  
  width = 3, _sU|<1  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 x Bn+-V  
  finish set_P_in(pump, P_pump_in) H ]BH  
zo*YPDEm"  
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 JX_hLy@`  
  yscale = 2, P19nF[A  
  step = 5, p"9
a`/  
  color = magenta, i#I+    
  width = 3, &V;^xMO!  
  "population of level 2 (%, rightscale)", xpo<1Sr>S  
  finish set_P_in(pump, P_pump_in) cnm&oC 6  
5@3[t`n'  
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 imcq H  
  yscale = 2, R/)cEvB-0  
  step = 5, : `D[0  
  color = red, z@E-pYV  
  width = 3, Rpit>  
  "population of level 3 (%, rightscale)", _is<.&f6  
  finish set_P_in(pump, P_pump_in) G([8Q8B4+  
J 00<NRxj"  
N>z<v\
`  
; ------------- Do@:|n  
diagram 3:                         ！输出图表3 !,}W|(P)  

A^+G w\  
"Variation ofthe Fiber Length" J[9yQ  
=ogzq.+|  
x: 0.1, 5 bH}6N>Fp  
"fiber length(m)", @x [jl'5ld  
y: 0, 10 =j[zMO  
"opticalpowers (W)", @y YxH"*)N  
frame h>v;1QO9D  
hx wN,DTmtD  
hy K5U=%z  
FY%v \`@1*  
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 I(fq4$  
  step = 20,             b#p)bcz!I  
  color = blue, @NMFurm  
  width = 3, a`5ODW+  
  "signal output" x2B~1
edf  
V$u~}]z  
;f: (set_L(x);P_out(pump)),                     ！改变光纤长度对泵浦信号输出功率的影响 @vWC "W  
   step = 20, color = red, width = 3,"residual pump" jbQ2G|:Q  
3nt&Sf  
! set_L(L_f) {restore the original fiber length } srfFJX7*  
D8P<mIu}Y  
t59"[kQ  
; ------------- qJQE|VM&  
diagram 4:                                  ！输出图表4 ZN!OM)@:!  
T^h;T{H2  
"TransverseProfiles" qM F'
&  
0;z-I"N  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) =jvM$  
)|`eCzCB  
x: 0, 1.4 * r_co /um CC1\0$ /  
"radialposition (µm)", @x Zd@'
s.,J  
y: 0, 1.2 * I_max *cm^2 p2}$S@GD  
"intensity (W/ cm&sup2;)", @y J<x?bIetj  
y2: 0, 1.3 * N_Tm Eq-fR~<9  
frame ? lC. Pq  
hx 96;17h$  
hy "'H$YhY]  
Pxu!,Mi[d  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 
K1>.%m  
  yscale = 2, &fA`Od6l"  
  color = gray, xN wKT
IK$  
  width = 3, }$u]aX<  
  maxconnect = 1, 
-jsNAQ  
  "N_dop (right scale)" n k]tq3.[  
\3dMA_5  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 DX.u"&Mm  
  color = red, :kSA^w8  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 Q:Q)-|,  
  width = 3, ~[XDK`B
  
  "pump" ($*bwqp]}  
T[M?:~  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 Be+'&+  
  color = blue, @O+yxGA  
  maxconnect = 1, I@P[}XS  
  width = 3, 3/8o)9f.  
  "signal" :)}iWKAse  
0-"ps]X  
B`OggdE  
; ------------- xB:,l'\G  
diagram 5:                                  ！输出图表5 uyP)5,  
a?6 r4u0  
"TransitionCross-sections" ]d?`3{h9LD  
:~loy'  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) T/G1v;]  
E :*!an  
x: 1450, 2050 1\q(xka{  
"wavelength(nm)", @x XOzPi*V**  
y: 0, 0.6 =zXpeo&|m  
"cross-sections(1e-24 m&sup2;)", @y FT73P0!8.  
frame +U&aK dQs  
hx uRG0}>]|U  
hy (:E_m|00;  
e:{v.C0ez  
f: s12_Tm(x * nm) /1e-24,      ！Tm³⁺吸收截面与波长的关系 qgrRH
'  
  color = red, ju8tNL,J  
  width = 3, I=l() ET=  
  "absorption" i;xH  
f: s21_Tm(x * nm) /1e-24,  ！Tm³⁺发射截面与波长的关系 N kp>yVj  
  color = blue, tu6oa[s  
  width = 3, *%(8z~(\  
  "emission" 1C+Y|p?KA  
'-3AWBWI1  

感谢，视频上有点看不清楚