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

(* yxt"vm;  
Demo for program"RP Fiber Power": thulium-doped fiber laser, rv*{[K  
pumped at 790 nm. Across-relaxation process allows for efficient k4K. mlIO  
population of theupper laser level. )j36Y =r3  
*)            ！（*  *）注释语句 #KJ# 1  
*(OG+OkC  
diagram shown: 1,2,3,4,5  ！指定输出图表 ?.46X^  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 lvke!~#  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响
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; 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 xaMDec V  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 hu}$\  
; 5:"Transition Cross-sections"    ！不同波长的跃迁横截面，横坐标波长，纵坐标为横截面 ZbYC3_7w  
9p W~Gz  
include"Units.inc"         ！读取“Units.inc”文件中内容 4E^ ?}_$  
X,k^p[Rcu  
include"Tm-silicate.inc"    ！读取光谱数据 Qo#]Lo> \g  
BIWe Hx  
; Basic fiberparameters:    ！定义基本光纤参数 Ou_H&R  
L_f := 4 { fiberlength }      ！光纤长度 ^1S{::  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 kW/G=_6  
r_co := 6 um { coreradius }                ！纤芯半径 'Lrn<  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 7}X1A!1  
<L-F3Buu  
; Parameters of thechannels:                ！定义光信道 hC\ l \y  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm +8Lbz^#  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 WO qDW~  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W A(FnU:  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um T8o](:B~  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 xe!bfzU  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 M
GR:IOTa  
Lnh=y2  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm <YaTr9%w  
w_s := 7 um                          ！信号光的半径 9
J3fiA_  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 >yC=@Uq+  
loss_s := 0                            ！信号光寄生损耗为0 E_ns4k#uG  
nI*.(+h  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 @_+aX.,  
V]zc-gYI  
; 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 )E^S+ps  
calc PQ&*(G  
  begin *S,~zOYN  
    global allow all;                   ！声明全局变量 ix!xLm9\  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 Hl$W+e|tj  
    add_ring(r_co, N_Tm); ) D@j6r  
    def_ionsystem();              ！光谱数据函数 AP&//b,^M  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 #t ;`  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 *ub2dH4/  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 gNCS*a  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 =)Xj[NNRT
 
    finish_fiber();                                   %O\@rws  
  end; E 2nz  
/|?$C7%a\D  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 /v 8"i^;}  
show "Outputpowers:"                                   ！输出字符串Output powers： *] ihc u  
show"pump:     ", P_out(pump):d3:"W"  ！输出字符串pump：和计算值（格式为3个有效数字，单位W） &,&+p0CSI!  
show"signal:   ",P_out(signal_fw):d3:"W" ！输出字符串signal：和计算值（格式为3个有效数字，单位W） Nfa&r  
eAy,T<#  
r: K1PO  
; ------------- I C  
diagram 1:                   !输出图表1 gm9*z.S\'  
Uy?jVPL  
"Powers vs.Position"          ！图表名称 E%mEfj7  
.#( vx;  
x: 0, L_f                      ！命令x: 定义x坐标范围 y]h0c<NP  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 ]m+%y+  
y: 0, 15                      ！命令y: 定义y坐标范围 Aw#<:6-  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 m}"Hm(,6  
frame          ！frame改变坐标系的设置 p@tg pFt  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） h(
|T.  
hx             ！平行于x方向网格 -|.NwGh  
hy              ！平行于y方向网格 p
<fCGU  
w!f2~j~  
f: P(pump, x),    ！命令f: 定义函数图；P(pump, x)函数是计算x位置处的泵浦光功率 V^_
A{\GK  
  color = red,  ！图形颜色 2*Qv6 :qK  
  width = 3,   ！width线条宽度 JEto_&8,C  
  "pump"       ！相应的文本字符串标签 `zQuhD 8W  
f: P(signal_fw, x),  ！P(signal_fw ,x) 函数是计算x位置处的前向信号光功率 bzi"7%c  
  color = blue,     Gx C+lqH#  
  width = 3, U6.aoqb%  
  "fw signal" x%mRDm~-  
f: P(signal_bw, x),   ！P(signal_bw ,x) 函数是计算x位置处的后向信号光功率 s)-oCT$[  
  color = blue, a4*v'Xc5  
  style = fdashed, dtTn]}J  
  width = 3, $_.t'8F  
  "bw signal" .QvD603%5  
6 >kULp  
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 EFX2>&mWo8  
  yscale = 2,            ！第二个y轴的缩放比例 YmV/[{  
  color = magenta, aXe&c^AR  
  width = 3, Dz}i-tw+  
  style = fdashed, digc7;8L  
  "n2 (%, right scale)" o 4F'z  
zhn?;Fi  
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 &da=hc,>%  
  yscale = 2, alb3oipOB  
  color = red, 5Kzt8Tv[  
  width = 3, e;.,x
5+  
  style = fdashed, *)K 5<}V  
  "n3 (%, right scale)" `D+zX
 
I*rUe#$  
!#0)`4O  
; ------------- :;%Jm  
diagram 2:                    ！输出图表2 Wb}-H-O  
Zl>SeTjB-  
"Variation ofthe Pump Power" K6v~!iiK$  
^>|ZN2  
x: 0, 10 L.;b(bFe  
"pump inputpower (W)", @x Myc-lCE  
y: 0, 10 h#0n2o#  
y2: 0, 100 vXKL<  
frame Y'/6T]a  
hx c9/w{
}F  
hy 2!%)_<  
legpos 150, 150 O nXo0PV/(  
s$fM,l:!  
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 R_EU|a
  
  step = 5, MdBmq/[O  
  color = blue, d@3
DsE.{i  
  width = 3, <'\Nv._2a  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 h"[B zX
  
  finish set_P_in(pump, P_pump_in) $0Y`>3  
A{_CU-,  
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 S1=P-Ao  
  yscale = 2, W2{w<<\$3}  
  step = 5, S#ryEgc]  
  color = magenta, dgVGP_~  
  width = 3, ~ 5}t;  
  "population of level 2 (%, rightscale)", <#0i*PM_  
  finish set_P_in(pump, P_pump_in) J^8j|%h%e  

-ssb|r  
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 7-S?RU]g  
  yscale = 2, Xqf\}p n  
  step = 5, $#=d@Nw_  
  color = red, ed'[_T}T3t  
  width = 3, QQAEG#.5  
  "population of level 3 (%, rightscale)", 2$JZ(qnN  
  finish set_P_in(pump, P_pump_in) 67EGkW?hbt  
{\>4)TA  
G2`YZ\  
; ------------- h3F559bw/<  
diagram 3:                         ！输出图表3 8~!E.u9w  
`}Y)l:G*g  
"Variation ofthe Fiber Length" 0
H_Ai=G  
#IH9S5B [  
x: 0.1, 5 *(x.egOR
d  
"fiber length(m)", @x SGKAx<U  
y: 0, 10 *<\`"C;  
"opticalpowers (W)", @y P#TPI*qw  
frame ~ZafTCa;  
hx jI,[(Z>  
hy ,!> ~izB  
\]>821r  
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 Mmz; uy_  
  step = 20,             th{J;a  
  color = blue, 7nPg2K&  
  width = 3, 1ZFKLI`V  
  "signal output"  r(^00hvH  
2D!jVr!  
;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 n1\$|[^6  
   step = 20, color = red, width = 3,"residual pump" "'5(UiSFz  
8i;1JA  
! set_L(L_f) {restore the original fiber length } IYn`&jS{  
q%,86A>  
.5 E)dU  
; ------------- ]{=y8]7  
diagram 4:                                  ！输出图表4 g:uVl;>  
]O;*Y{:Y  
"TransverseProfiles" :[@rA;L  

TqJ @l  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) &_3#W.w~Z  
Nd(3q]{  
x: 0, 1.4 * r_co /um <^nS%hXEr  
"radialposition (µm)", @x sd4eG  
y: 0, 1.2 * I_max *cm^2 IWYQ67Yj   
"intensity (W/ cm&sup2;)", @y |}{gE=]  
y2: 0, 1.3 * N_Tm Sk EI51]  
frame gI7*zR4D  
hx ln_&Ux+l  
hy W$]qo|2P  
u'? +JUd1  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 >!5RY8+  
  yscale = 2, v[|-`e*  
  color = gray, }S iR;2W  
  width = 3, Zf>:h   
  maxconnect = 1, ((Av3{05H&  
  "N_dop (right scale)" IS"[<  
{zZ)JWM<w  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 (PE.v1T  
  color = red, <e! TF@  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 [!U%''  
  width = 3, W7C1\'T  
  "pump" p7AsNqEp  
ok6t| 7sq  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 C'@I!m._i  
  color = blue, ~5Fx[q  
  maxconnect = 1, @@@}FV&  
  width = 3, :Xy51p`.;]  
  "signal" Lp%J:ogV`  
V
9/2y9u  
B _ J2Bf  
; ------------- @ddCVxd  
diagram 5:                                  ！输出图表5 &@xm< A\S  
tJ\v>s-f  
"TransitionCross-sections" U;kNo3=  
kJ%a;p`O  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) l`#rhuy`  
dB~A4pZa  
x: 1450, 2050 K:e[#b8:R  
"wavelength(nm)", @x L_T+KaQCH  
y: 0, 0.6 3 }sy{Mx%9  
"cross-sections(1e-24 m&sup2;)", @y LRw-I.z  
frame Z;NaIJiL-  
hx i<$?rB!i<1  
hy @r<2]RXlc  
=,6X_m  
f: s12_Tm(x * nm) /1e-24,      ！Tm³⁺吸收截面与波长的关系 i{9.bpp/  
  color = red, `_.:O,^n^  
  width = 3, G
_qt~U  
  "absorption" #'@@P6o5  
f: s21_Tm(x * nm) /1e-24,  ！Tm³⁺发射截面与波长的关系 cjtcEW  
  color = blue, G/~b(V;>  
  width = 3, R'1j  
  "emission" 'w1ll9O  
``]NB=N}{1  

感谢，视频上有点看不清楚