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小火龙果 2020-05-28 16:28

RP Fiber Power仿真设计掺铥光纤激光器代码详解

(* VfU"%0x  
Demo for program"RP Fiber Power": thulium-doped fiber laser, xSY"Ru  
pumped at 790 nm. Across-relaxation process allows for efficient qTsy'y;Z  
population of theupper laser level. 8Qvs\TY  
*)            ！（*  *）注释语句 yRXML\Ge  
o'2eSm0H  
diagram shown: 1,2,3,4,5  ！指定输出图表 $n<a`PdH  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 t.P@Ba^  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 C- .;m  
; 3:"Variation of the Fiber Length"！信号输出功率vs 光纤长度的变化，仿真最佳光纤长度 GJ9>i)+h;  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 F!+1w(b:  
; 5:"Transition Cross-sections"    ！不同波长的跃迁横截面，横坐标波长，纵坐标为横截面 Z?)g'n  
Ss[[V(-  
include"Units.inc"         ！读取“Units.inc”文件中内容 ;V,L_"/X  
,#Z%0NLe  
include"Tm-silicate.inc"    ！读取光谱数据 Xa[k=qFo  
;aQ`` B  
; Basic fiberparameters:    ！定义基本光纤参数 WZQ2Mi<&1'  
L_f := 4 { fiberlength }      ！光纤长度 bzr2Zj{4  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 oE ' P  
r_co := 6 um { coreradius }                ！纤芯半径 nI:M!j5s`  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 4]o+)d.`(  
qTJhYxm  
; Parameters of thechannels:                ！定义光信道 y:'Ns$+  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm hGtz[u#p  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 ]]j^  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W \^)i!@v  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um }c/p;<  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 f-%M~:  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 2KLMFI.F  
%"WENa/t  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm { 4J.  
w_s := 7 um                          ！信号光的半径 ~[;r) g\  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 2e_ Di(us  
loss_s := 0                            ！信号光寄生损耗为0 )eZK/>L&  
k]m ~DVS  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 wf8{v  
b-u@?G|<  
; 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 JduO^Fit  
calc x^ `/&+m  
  begin E)-;sFz  
    global allow all;                   ！声明全局变量 A \/~u"Y  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 uu6 JZp  
    add_ring(r_co, N_Tm); #9,8{ O"  
    def_ionsystem();              ！光谱数据函数 q T6y&  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 nxZz{&  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 T}fo  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 :\^b6"}8  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 Qs1CK;+zU  
    finish_fiber();                                   O#)1 zD}  
  end; ~1O|4mssS  
QAkK5,`vV.  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 *w0!C:mL&  
show "Outputpowers:"                                   ！输出字符串Output powers： VrIN.x  
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） Z9vMz3^N  
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） C.?^] Y  
^lp=4C9  
?I+{S  
; ------------- vl:~&I&y;R  
diagram 1:                   !输出图表1 1KZigeHXI  
#)'Iqaq7  
"Powers vs.Position"          ！图表名称 =@U5/J  
;EBKzB  
x: 0, L_f                      ！命令x: 定义x坐标范围 )Rn\6ka  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 ZID-~ 6  
y: 0, 15                      ！命令y: 定义y坐标范围 u+8"W[ZULq  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 |]G%b[  
frame          ！frame改变坐标系的设置 SH)-(+72d  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） k[f2`o=  
hx             ！平行于x方向网格 [/a AH<9b  
hy              ！平行于y方向网格 JC cYFtW  
j|KDgI<0  
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 oJA_" xp  
  color = red,  ！图形颜色 )0/9 L  
  width = 3,   ！width线条宽度 }u;K<<h:  
  "pump"       ！相应的文本字符串标签 Jl_W6gY"Z  
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 a3 }V/MY  
  color = blue,     3dN`Q:1R9  
  width = 3, [H*JFKpx  
  "fw signal" jL-2 }XrA  
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 |OeWM  
  color = blue, UF-&L:s[  
  style = fdashed, ~dS15E4-Pp  
  width = 3, D>|`+=1'0"  
  "bw signal" 4aArxJ  
ao)';[%9s  
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 T\9[PX<  
  yscale = 2,            ！第二个y轴的缩放比例 }U8v ~wcd  
  color = magenta, DQGrXMpV0  
  width = 3,  26p[x'W  
  style = fdashed, YZ>L_$:q  
  "n2 (%, right scale)" 0`"oR3JY  
p3vf7eqn  
f: 100 * n(x, 3),          ！n(x ,3) 函数是计算x位置处激活粒子数在能级3上的占比 PA'&]piPl:  
  yscale = 2, x'g4DYl  
  color = red, o8X_uKEI  
  width = 3, \-yI dKj  
  style = fdashed, rfk{$g  
  "n3 (%, right scale)" x3i}IC  
]EKg)E  
Y\9}LgIvr  
; ------------- Qs\a&Q=0H  
diagram 2:                    ！输出图表2 fG1iq<~  
x*H#?.E  
"Variation ofthe Pump Power" G4'Ia$  
Lf(( zk:pt  
x: 0, 10 5, $6mU#=  
"pump inputpower (W)", @x ~B|m"qY{i  
y: 0, 10 nF'YG+;|@  
y2: 0, 100 n~UI 47  
frame ^i|R6oO_5  
hx g ` s|]VNt  
hy D^4nT,&8  
legpos 150, 150 36Lkcda[  
q;,lv3I  
f: (set_P_in(pump, x);P_out(signal_fw)), ！set_P_in(pump,x)改变泵浦信道功率；P_out(signal_fw)输出前向信号光 lWYp  
  step = 5, :|n[zjK/S  
  color = blue, 'S3<' X  
  width = 3, LWCFCkx%  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 R%KF/1;/  
  finish set_P_in(pump, P_pump_in) A1/@KC"&{G  
QdgJNT<=H,  
f: (set_P_in(pump,x); 100 * n_av(2)),   ！改变泵浦信号功率对能级2上激活粒子占比的影响 @dv8 F "v  
  yscale = 2, 0Agse)  
  step = 5, "r46Rfa  
  color = magenta, %[|^7  
  width = 3, d@ K-ZMq  
  "population of level 2 (%, rightscale)", ]JkEf?;.  
  finish set_P_in(pump, P_pump_in) estiS  
by<@\n2B:U  
f: (set_P_in(pump,x); 100 * n_av(3)),   ！改变泵浦信号功率对能级3上激活粒子占比的影响 l$&~(YE f  
  yscale = 2, 36{GZDGQ  
  step = 5, Wu 0:X*>}p  
  color = red, p=:Vpg<!  
  width = 3, :\|A.# U  
  "population of level 3 (%, rightscale)", 7(1`,Y  
  finish set_P_in(pump, P_pump_in) 3SIq od;%  
0Ncpi=6  
-8^qtB  
; ------------- @[lMh9`  
diagram 3:                         ！输出图表3 ES4Wtc)&  
],SQD3~9  
"Variation ofthe Fiber Length" o=R(DK# U  
7}VqXUwabx  
x: 0.1, 5 fz^j3'!\  
"fiber length(m)", @x 5;}W=x^$a  
y: 0, 10 T^7Cv{[  
"opticalpowers (W)", @y M/6Z,oOU  
frame ol"|?*3q  
hx G{!er:Vwdh  
hy  E4eX fu  
44} 5o  
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 _nqnO8^IG4  
  step = 20,             Ip'tB4Mq  
  color = blue, J>  
  width = 3, 0FOB5eBR  
  "signal output" O=3/ qs6m  
sA,bR|  
;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 QP%_2m>yhl  
   step = 20, color = red, width = 3,"residual pump" '|4+< #  
}AS/^E  
! set_L(L_f) {restore the original fiber length } #Kb /tOp1  
6|NH*#s  
!vnC-&G  
; ------------- rk8pL[|  
diagram 4:                                  ！输出图表4 r""rJzFz'  
F_*']:p  
"TransverseProfiles" [@Ac#  
lndz  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) -!XG>Z  
T2Yf7Szp  
x: 0, 1.4 * r_co /um Z i6s0Uck  
"radialposition (µm)", @x -iiX!@  
y: 0, 1.2 * I_max *cm^2 !ekByD  
"intensity (W/ cm&sup2;)", @y [8 Pt$5]^  
y2: 0, 1.3 * N_Tm *Y(59J2  
frame b11I$b #  
hx zhw*Bed<  
hy Y2DL%'K^  
OV]xo8a;  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 ^f,4=-  
  yscale = 2, ;}+M2Ec51  
  color = gray, ,LA'^I?  
  width = 3, (C. $w  
  maxconnect = 1, iI<c  
  "N_dop (right scale)" 2G~{x7/[@  
w80X~  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 LWM<[8wJ4  
  color = red, 9;L4\  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 WPRk>j  
  width = 3, sa8O<Ab  
  "pump" ]W?cy  
H=BI%Z  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 nG'Yo8I^5  
  color = blue, \na$Sb+  
  maxconnect = 1, 5b:1+5iF-  
  width = 3, 'mZ v5?  
  "signal" Sl8+A+  
 ]ltCJq  
<~dfp  
; ------------- +DRt2a #  
diagram 5:                                  ！输出图表5 fJ/INL   
[k$GUU,jY  
"TransitionCross-sections" %:~Ah6R1  
3g;Y  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) qefp3&ls  
oSrA4g  
x: 1450, 2050 {Z/iYHv~#c  
"wavelength(nm)", @x 'f{13-# X@  
y: 0, 0.6 X}Q4;='C-  
"cross-sections(1e-24 m&sup2;)", @y 8~(,qU8-N  
frame =u2~=t=LV  
hx ~S('\h)1  
hy 0cG[<\qT  
2-'_Nwkl*  
f: s12_Tm(x * nm) /1e-24,      ！Tm3+吸收截面与波长的关系 ~a_hOKU5  
  color = red, m^oG9&";  
  width = 3, _AF$E"f@  
  "absorption" gqv+|:#  
f: s21_Tm(x * nm) /1e-24,  ！Tm3+发射截面与波长的关系 ]lA}5  
  color = blue, _zDS-e@  
  width = 3, j(y<oxh  
  "emission" 7D<Aa?cv_l  
+}m`$B}mJ  
lileisgsz 2021-09-28 09:47
感谢，视频上有点看不清楚
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