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

(*  ! n@*6  
Demo for program"RP Fiber Power": thulium-doped fiber laser, >SS YYy  
pumped at 790 nm. Across-relaxation process allows for efficient mRJX,  
population of theupper laser level. df@r2 /Y  
*)            ！（*  *）注释语句 PDwi])6mf  
kY e3A&J  
diagram shown: 1,2,3,4,5  ！指定输出图表 urM=l5Sx  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 .aJ\^
Fx  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 WKjE^u  
; 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 btb$C  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 /da5"  
; 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 `R\aNgCS}  
Id_?  
include"Units.inc"         ！读取“Units.inc”文件中内容 R1CoS6  
1^F !X=  
include"Tm-silicate.inc"    ！读取光谱数据 8v eG^o  
WX2:c,%:  
; Basic fiberparameters:    ！定义基本光纤参数 0f"9wPC  
L_f := 4 { fiberlength }      ！光纤长度 k5s8s@  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 "YW&,X5R  
r_co := 6 um { coreradius }                ！纤芯半径 Q7<_>)e^  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 fV}:eEo|Y  
}cl~Vo-mp  
; Parameters of thechannels:                ！定义光信道 kX0hRX  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm ED0Vlw+1  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 '*`25BiQ  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W 4<P=wK=a8X  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um Etv!:\
\[  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 uL.)+E  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 e|6kgj3/  
c,wYXnJ_t  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm :K-05$K  
w_s := 7 um                          ！信号光的半径 y,D@[*~Xb  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 zk#NM"C+  
loss_s := 0                            ！信号光寄生损耗为0 uv&??F]/  
701mf1a  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 ,RP"m#l!\  
T4 :UJj}  
; Function for defining themodel:   ！定义模型函数，一定要有calc命令，否则函数只会被定义，但不会被执行 }8joltf  
calc `a$c6^a  
  begin )qyJwN .D  
    global allow all;                   ！声明全局变量 tWT,U[  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 .mr&zq  
    add_ring(r_co, N_Tm); blUnAu o~  
    def_ionsystem();              ！光谱数据函数 NVt612/'7y  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 F_<n8U:Y  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 V*}xl
xSL  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 %A]?5J)Bi  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 t[dOWgHi  
    finish_fiber();                                   @ PboT1  
  end; [9hslk  
O_gr{L}  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 qdss(LZ  
show "Outputpowers:"                                   ！输出字符串Output powers： 5ov F$qn  
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） nM=5L:d  
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） 2rzOh},RS  
?.A~O-w  
C
i?BJ,  
; ------------- ){D6E9  
diagram 1:                   !输出图表1 ZmXO3,sf)  
t\GoUeH]  
"Powers vs.Position"          ！图表名称 +n'-%?LD&  
\sSt _|+  
x: 0, L_f                      ！命令x: 定义x坐标范围 Qru iQ/t  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 hggP9I:s,  
y: 0, 15                      ！命令y: 定义y坐标范围 %z9lCTmy  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 5]c\{G  
frame          ！frame改变坐标系的设置 bjR:5@"  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） :kQ%Mj>
  
hx             ！平行于x方向网格 t)p. $  
hy              ！平行于y方向网格 6I<^wS9j_  
XABB6J]  
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 D  ,U#z  
  color = red,  ！图形颜色 o0Z~9iF&  
  width = 3,   ！width线条宽度 uQ(C,f[6p  
  "pump"       ！相应的文本字符串标签 g,k} nkIT  
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 Y
<ZaW
{%  
  color = blue,     -;1nv:7Z3  
  width = 3, N=vb*3ECg  
  "fw signal" #;+ABV  
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 6r]l8*34;  
  color = blue, PLV-De  
  style = fdashed, "sD[P3  
  width = 3, 8kRqF?rbj  
  "bw signal" q{c/TRp7  
0#/NZ
O  
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 u)hr  
  yscale = 2,            ！第二个y轴的缩放比例 pXE'5IIN  
  color = magenta, ,UveH` n-  
  width = 3,  BH<jnQ  
  style = fdashed, :TZ</3Sw  
  "n2 (%, right scale)" K(: _52rt  
xY=%+o.?*  
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 iVUkM3  
  yscale = 2, =>0G
 
  color = red, ^&|KuI+u  
  width = 3, QnZ7e#@UP  
  style = fdashed, `Lr I^9Z  
  "n3 (%, right scale)" y@'~fI!E4  
E*W|>2nx]  
(rT1wup  
; ------------- Rf4}4ixkj  
diagram 2:                    ！输出图表2 gm1 7VrC  
X }""= S<  
"Variation ofthe Pump Power" Vz\?a8qQ<  
HX`>" ?{  
x: 0, 10 |PaVb4j  
"pump inputpower (W)", @x l`b%imX  
y: 0, 10 |bM?Q$>~  
y2: 0, 100 *[ww;  
frame C]f`  
hx a*N<gId  
hy wRCv?D`vV  
legpos 150, 150 *ak"}s  
U 6`E\?d`  
f: (set_P_in(pump, x);P_out(signal_fw)), ！set_P_in(pump,x)改变泵浦信道功率；P_out(signal_fw)输出前向信号光 !]l!I9  
  step = 5, bpaS(nBy  
  color = blue, = a54  
  width = 3, W*!u_]K>  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 +wpQ$)\  
  finish set_P_in(pump, P_pump_in) %gbvX^E?  
km=d'VvnI  
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 2+'4m#@)  
  yscale = 2, +]*hzWbe  
  step = 5, n
B.u5  
  color = magenta, 3x6@::s~  
  width = 3, FJC}xEMcN  
  "population of level 2 (%, rightscale)", })TXX7[h  
  finish set_P_in(pump, P_pump_in) |Ev VS  
IS[&V&.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 UPr8Q^wm  
  yscale = 2, PpWn+''M  
  step = 5, [+_0y[~,tB  
  color = red, rd0[(-  
  width = 3, <ZwmXD.VD  
  "population of level 3 (%, rightscale)", t$k$Hd';  
  finish set_P_in(pump, P_pump_in) .G/2CVM
j  
,f3Ck*
M  
d~za%2{  
; ------------- ,2/y(JX}*!  
diagram 3:                         ！输出图表3 1^R:[L4R`  
;qwNM~  
"Variation ofthe Fiber Length" <`Q*I Y  
7TaHE   
x: 0.1, 5 OO  /Pc  
"fiber length(m)", @x w}:&+B:  
y: 0, 10 meM61ue_2  
"opticalpowers (W)", @y m!H7;S-(  
frame 4.o[
:5'  
hx IHaNg K2  
hy ge@KopZ&  
zZ})$Ny(  
f: (set_L(x);P_out(signal_fw)),     ！改变光纤长度对信号光输出功率的影响 c.JMeh  
  step = 20,             |`c=`xK7'  
  color = blue, c_
+y~X)i  
  width = 3, D8r=Vf  
  "signal output" `xm4?6  
nApkK1?  
;f: (set_L(x);P_out(pump)),                     ！改变光纤长度对泵浦信号输出功率的影响 7$/%c{o  
   step = 20, color = red, width = 3,"residual pump" A3cW8OClz  
tiHP?N
U  
! set_L(L_f) {restore the original fiber length } 4Px  
<RPy   
25-5X3(>j=  
; ------------- A"W}l)+X  
diagram 4:                                  ！输出图表4 7$HN5T\!  
0*umf.R  
"TransverseProfiles" Zyx92z9Y  
tMnwY'  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) TexSUtx@$  
dXvp-oi  
x: 0, 1.4 * r_co /um n>["h2  
"radialposition (µm)", @x 1-6[KBQ8  
y: 0, 1.2 * I_max *cm^2 ^V5g[XL2  
"intensity (W/ cm&sup2;)", @y -0R;C`(!  
y2: 0, 1.3 * N_Tm 'D1Sm&M2%e  
frame U2@Mxw  
hx di,?`  
hy WymBjDos:  
SGUu\yS&s  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 @cT= t0*  
  yscale = 2, 
[WxRwE  
  color = gray, <6L=% \X{*  
  width = 3, jh3XG  
  maxconnect = 1, 7x ?2((  
  "N_dop (right scale)" ulzQ[?OMl  
~3F\7%Iqc  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布
8ta`sNy9  
  color = red, v*UJ4r  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 RxZ#`$F  
  width = 3, x-3!sf@  
  "pump" {6uhUb  
7HkQ|~zGT  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 WI+ 5x  
  color = blue, .gS x`|!  
  maxconnect = 1, ,O[Maj/ch  
  width = 3, V`;$Ua;y  
  "signal" =O?#>3A}  
sKLH.@  
o"5[~$O  
; ------------- IC:wof
"  
diagram 5:                                  ！输出图表5 xU5+"t~  
%C^%Oq_k  
"TransitionCross-sections" ])YGeY(V0+  
kk*:S*,  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) i8Y$cac!  
[Q+qu>&HB7  
x: 1450, 2050 "Nx3_mQ  
"wavelength(nm)", @x 3{;W!/&>  
y: 0, 0.6 d|, B* N(w  
"cross-sections(1e-24 m&sup2;)", @y \h&ui]V  
frame +#|):aF  
hx w`?
Rd  
hy &D[pX|!  
!^/Mn  
f: s12_Tm(x * nm) /1e-24,      ！Tm³⁺吸收截面与波长的关系 $^1L|KgXp  
  color = red,
&K*x[  
  width = 3, n!*uv~%$  
  "absorption" 8%;K#,>  
f: s21_Tm(x * nm) /1e-24,  ！Tm³⁺发射截面与波长的关系 53w@
 
  color = blue, uKBSv*AM  
  width = 3, mm5y'=#  
  "emission" 5r$X  
s, 8a1o  

感谢，视频上有点看不清楚