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

(* -/ G#ls|?  
Demo for program"RP Fiber Power": thulium-doped fiber laser, * =*\w\ te  
pumped at 790 nm. Across-relaxation process allows for efficient [nG[ x|;|  
population of theupper laser level. [)?9|yY"`  
*)            ！（*  *）注释语句 U{qwhz(  
v,Zoy|Lu  
diagram shown: 1,2,3,4,5  ！指定输出图表 l[i1,4  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 D<:zw/IRE  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 1/,~0N9  
; 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 v}id/brl  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 (>,b5g  
; 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 nBLb1T  
=dwy 4  
include"Units.inc"         ！读取“Units.inc”文件中内容 OsW*@v(  
}u1h6rd `  
include"Tm-silicate.inc"    ！读取光谱数据 D^a(|L3;  
q&}+O  
; Basic fiberparameters:    ！定义基本光纤参数 @^J>.
g  
L_f := 4 { fiberlength }      ！光纤长度 jcjl q-x  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 Q+/P>5O/  
r_co := 6 um { coreradius }                ！纤芯半径
Z +O<IF%  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 @iMF&\KC  
uH(M@7"6_!  
; Parameters of thechannels:                ！定义光信道 0|i|z!N>  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm CMyz!jZ3  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 acgx')!c  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W ktRGl>J  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um !]5V{3  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 3[m2F O,Z  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0
LM 1Vsh<  
x8x-b>|$&<  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm Jl6lZd(Np  
w_s := 7 um                          ！信号光的半径 L4ct2|w}ul  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 \j-:5M#m  
loss_s := 0                            ！信号光寄生损耗为0 Bj"fUI!dK  
<:&{c-
f/  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 d'H gek{T  
ZD7q

w*3+  
; 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 ,b5vnW\  
calc N7KG_o%  
  begin ^.  
    global allow all;                   ！声明全局变量 =q|//*t2  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 )=bW\=[8  
    add_ring(r_co, N_Tm); OEX\]!3_Fm  
    def_ionsystem();              ！光谱数据函数 <r(D\rmD  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 t@a&&  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 ^t*Ba>A  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 X<pNc6  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 VS!v7-_N5  
    finish_fiber();                                   BjfTt:kY  
  end; s,pg4nst56  
OF)*kiJ  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 {t.S_|IE  
show "Outputpowers:"                                   ！输出字符串Output powers： /d/]#T[Z9  
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） P2 qC[1hYH  
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） XX "3.zW  
VR%*8=  
ykH@kv Qt  
; ------------- xP
;>p| M  
diagram 1:                   !输出图表1 1C]BaPbL  
NB86+2stu  
"Powers vs.Position"          ！图表名称 lDF7~N9J_  
rhX?\_7o  
x: 0, L_f                      ！命令x: 定义x坐标范围 :7JP(j2  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 (d*||"  
y: 0, 15                      ！命令y: 定义y坐标范围 94]i|2qj*  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 5*Qzw[[=  
frame          ！frame改变坐标系的设置 ts("(zI1E  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） (ip3{d{CT]  
hx             ！平行于x方向网格 ${}9/(x/^  
hy              ！平行于y方向网格 1'iQlnMO@  
( z F_<  
f: P(pump, x),    ！命令f: 定义函数图；P(pump, x)函数是计算x位置处的泵浦光功率 g!r)yzK  
  color = red,  ！图形颜色 #JY>  
  width = 3,   ！width线条宽度 F1L[C4'  
  "pump"       ！相应的文本字符串标签 <b\8<mTr  
f: P(signal_fw, x),  ！P(signal_fw ,x) 函数是计算x位置处的前向信号光功率 .7:ecF
Kk  
  color = blue,     q_L. Sy|)  
  width = 3, 1mR@Bh  
  "fw signal" j~>J?w9<O  
f: P(signal_bw, x),   ！P(signal_bw ,x) 函数是计算x位置处的后向信号光功率 .I$+ E  
  color = blue, Uz[#ye  
  style = fdashed, 'A\0^EvVv  
  width = 3, l<ZHS'-;8  
  "bw signal" =UWW(^M#[:  
4d}
n0b\d  
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 tB4yj_ZF  
  yscale = 2,            ！第二个y轴的缩放比例 {yEL$8MC  
  color = magenta, IG2z3(j  
  width = 3, >IA1 \?(  
  style = fdashed, V?`|Ha}  
  "n2 (%, right scale)" \%%M>4c  
rSm#/)4A  
f: 100 * n(x, 3),          ！n(x ,3) 函数是计算x位置处激活粒子数在能级3上的占比 :Z_abKt  
  yscale = 2, gw%L M7yQR  
  color = red, St> E\tXp  
  width = 3, Ml{4)%~Y7f  
  style = fdashed, 0dI7{o;<|  
  "n3 (%, right scale)" 'aEN(Mdz1e  
=^l`c$G<  
)nK+`{;@!  
; ------------- mv`b3 $  
diagram 2:                    ！输出图表2 0tPw
hJ  
+&J1D8  
"Variation ofthe Pump Power" TV0Y{x*~iH  
wyAh%'V  
x: 0, 10 8493O x4 O  
"pump inputpower (W)", @x 0AoWw-H6V  
y: 0, 10 J~ +p7S  
y2: 0, 100
Ad>@8^  
frame *YX:e@Fm.a  
hx KZaiy*
>)  
hy zzh7 "M3Qn  
legpos 150, 150 F&3:]1  
=)N6R  
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 9(_n8br1  
  step = 5, ycvgF6Me<  
  color = blue, :!fY;c?  
  width = 3, V>UlL&V  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 8= 82x
 
  finish set_P_in(pump, P_pump_in) >fkV65w{*  
f}ch1u>  
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 s.KfMJ"u[  
  yscale = 2, 3Q)"  
  step = 5, ra_TN;(  
  color = magenta, |RqCI9N6  
  width = 3, Ys?0hd<cn  
  "population of level 2 (%, rightscale)", M-F{I%Vx  
  finish set_P_in(pump, P_pump_in) z U*Mk  
4<5*HpW  
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 9+.3GRt7  
  yscale = 2, #!_ViG )2^  
  step = 5, e ^`La*n  
  color = red, o>m*e7l,  
  width = 3, 1}p:]/;  
  "population of level 3 (%, rightscale)", o4L
VG  
  finish set_P_in(pump, P_pump_in) lR`.V0xA  
yLl:G;  
X76rme  
; ------------- %j{*`}
 
diagram 3:                         ！输出图表3 9'|_1Q.b^  
XB:E<I'q!3  
"Variation ofthe Fiber Length" }?O>.W,/  
[<Mls@?  
x: 0.1, 5 ~4] J'E >  
"fiber length(m)", @x _=cuOo"!  
y: 0, 10 BE0Xg  
"opticalpowers (W)", @y 60D6UW  
frame 9OlJC[  
hx fj9&J[
 
hy +HD2]~{EkL  
YhN:t?  
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 )2u_c=  
  step = 20,             a\B?J  
  color = blue, `nc=@" 1  
  width = 3, CE| *&G  
  "signal output" 5CH8;sMK  
}b{7+ + Ah  
;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 p`!<yq2_  
   step = 20, color = red, width = 3,"residual pump" 'mF&`BN}b  
6J cXhlB`  
! set_L(L_f) {restore the original fiber length } @Yw42`>!s  
Mi}k>5VT  
Zl.,pcL  
; ------------- >]Dn,*R  
diagram 4:                                  ！输出图表4 &7{yk$]*  
rV*Ri~Vx  
"TransverseProfiles" 6.|[;>Km  
EQ"+G[j~x  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) R[QBFL<  
RS2uk7MB  
x: 0, 1.4 * r_co /um !|mzu1S
 
"radialposition (µm)", @x {T0Au{88H  
y: 0, 1.2 * I_max *cm^2 w.+G+r=  
"intensity (W/ cm&sup2;)", @y SI=7$8T5=5  
y2: 0, 1.3 * N_Tm '+*'sQvH[  
frame ]L3MIaO2T  
hx &,\my-4c>  
hy {qs>yQ6a:-  
xlc2,L;i  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 ws$kwSHq  
  yscale = 2, fOP3`G^\  
  color = gray, y3P4]sq  
  width = 3, B f.- 5  
  maxconnect = 1, {CX06BP  
  "N_dop (right scale)" \J-D@b;  
_Y)Wi[  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 bH%d*  
  color = red, E0u&hBd3_  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 I(z16wQ  
  width = 3,
#f_.  
  "pump" 3A.lS+P1  
\9}DAM_  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 Bt(nm>Ng  
  color = blue, uu/2C \n}  
  maxconnect = 1, AH:0h X6+  
  width = 3, m<J:6^H@  
  "signal" ghTue*A  
Fnd_\`9{  
f`[E^zj  
; ------------- F><ficT  
diagram 5:                                  ！输出图表5 ezS@`_pR;  
9vCCE[9  
"TransitionCross-sections" w/9%C(w6  
u7},+E)+B  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) S.?DR3XLc  
#1WCSLvtV  
x: 1450, 2050 B'bOK`p  
"wavelength(nm)", @x [* |+ it+!  
y: 0, 0.6 "kjSg7m*:  
"cross-sections(1e-24 m&sup2;)", @y p@oz[017/J  
frame :4r*Jju<V  
hx )G*xI`(@  
hy q w@g7  
|w5,%#AeO$  
f: s12_Tm(x * nm) /1e-24,      ！Tm³⁺吸收截面与波长的关系 X3?RwN:P  
  color = red, /0XmU@B  
  width = 3, *n6L3"cO  
  "absorption" MHA_b^7?  
f: s21_Tm(x * nm) /1e-24,  ！Tm³⁺发射截面与波长的关系 2AEVBkF;M  
  color = blue, 7"OJ,Mx%  
  width = 3, v[)8 1uY  
  "emission" beNy5~M$  
1Vs>G  

感谢，视频上有点看不清楚