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

(* LPu*Lkx  
Demo for program"RP Fiber Power": thulium-doped fiber laser, ckY#oRQ1  
pumped at 790 nm. Across-relaxation process allows for efficient 7Vh  
population of theupper laser level. 5 m-/N?c  
*)            ！（*  *）注释语句 Qg(;>ops  
]YFjz/f  
diagram shown: 1,2,3,4,5  ！指定输出图表 wS
#Uw_[  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 )?(Ux1:w)  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 )lS04|s  
; 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 &,jUaC5I  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 u^{p'a'  
; 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 qmFbq<&  
pFNU~y'Kf  
include"Units.inc"         ！读取“Units.inc”文件中内容 [w@S/K[_|  
[Tbnfst  
include"Tm-silicate.inc"    ！读取光谱数据 4aBVO%t  
^tG,H@95  
; Basic fiberparameters:    ！定义基本光纤参数 W$NFk(  
L_f := 4 { fiberlength }      ！光纤长度 ?z l<"u  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 O)VcW/  
r_co := 6 um { coreradius }                ！纤芯半径 O$m &!J  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 #\m.3!Hcr  
Kd+E]$F_OH  
; Parameters of thechannels:                ！定义光信道 sfn^R+x4,9  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm ?yq=
c  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 HB5-B XBU  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W .Hqq!&  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um g1[BrT,  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 ,;w~ VZ4  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 T:{r*zLSN  
#.HnO_sK_  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm GEf=A.WAfw  
w_s := 7 um                          ！信号光的半径 E\s1p:%  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 U{oM*[  
loss_s := 0                            ！信号光寄生损耗为0 ]7W!f 2@  
{Oy|c  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 sZ&|omN  
$G"\@YC<  
; Function for defining themodel:   ！定义模型函数，一定要有calc命令，否则函数只会被定义，但不会被执行 o(Z~J}l({  
calc 7UW\|r  
  begin L f"!:]  
    global allow all;                   ！声明全局变量 1aRTvaG
o  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 -;_"Y]#  
    add_ring(r_co, N_Tm); ;2
`6eyr  
    def_ionsystem();              ！光谱数据函数 >\? z,Nin  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 0Pf88'6  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 +)q ,4+K%}  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 ^t gjs$M|  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 6X h7Bx1  
    finish_fiber();                                   ?|W3RK;  
  end; W)Y`8&,  


1%B9xLq  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 Ev
m3Sm!S  
show "Outputpowers:"                                   ！输出字符串Output powers： `IwZVz  
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） 
n)q8y0if  
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） 9 CZ@IFS  
aQx6;PC  
}>BNdm"Er  
; ------------- _yN5sLLyb  
diagram 1:                   !输出图表1 W1"NKg~4  
P`Ku. ONQ  
"Powers vs.Position"          ！图表名称 U3:|!CC)T  
qfJ2iE|o2.  
x: 0, L_f                      ！命令x: 定义x坐标范围 }a5TY("d9H  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 gtMR/P:S  
y: 0, 15                      ！命令y: 定义y坐标范围 o;Z"I&  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 A)
n_ST0  
frame          ！frame改变坐标系的设置 .cs x"JC  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） "]]LQb$  
hx             ！平行于x方向网格 p )JR5z  
hy              ！平行于y方向网格 =T2SJ)  
v0)Y,hW  
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 K(upzn*a  
  color = red,  ！图形颜色 B(s^(__]  
  width = 3,   ！width线条宽度 _4Eq_w`  
  "pump"       ！相应的文本字符串标签 QEt"T7a[/  
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 A? B+  
  color = blue,     '1b8>L  
  width = 3, 8o|C43Q_  
  "fw signal" ZJ2 MbV.6  
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 VZcW 3/Y  
  color = blue, T=-UcF  
  style = fdashed, o#wly%i')  
  width = 3, Ir>4-@  
  "bw signal" 7=?!B#hm!  
p#P<V%  
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 M("sekL  
  yscale = 2,            ！第二个y轴的缩放比例 ~Oq _lM  
  color = magenta, `O2P&!9&  
  width = 3, Z9M$*Z
p  
  style = fdashed, u5ZyOZ;  
  "n2 (%, right scale)" l([aKm#  
Jb*QlsGd  
f: 100 * n(x, 3),          ！n(x ,3) 函数是计算x位置处激活粒子数在能级3上的占比 OV;VsF  
  yscale = 2, =ZURh_{xV  
  color = red, *l =f=  
  width = 3, v?]a tb/h`  
  style = fdashed, hL/u5h%$  
  "n3 (%, right scale)" #|je m   
8=Oym~  
kI(3Pf].  
; ------------- CQ6I4k  
diagram 2:                    ！输出图表2 Yu" Q  
/Lr`Aka5  
"Variation ofthe Pump Power" +i!H
MyM  
ZlC+DXg#S  
x: 0, 10 8f~x\.  
"pump inputpower (W)", @x L%$-?O|  
y: 0, 10 iupkb  
y2: 0, 100 !Q~>)$Cf^  
frame zT)cg$8%fY  
hx e{87n>+,  
hy h&L-G j  
legpos 150, 150 #lqH/>`>  
^(+q1O'  
f: (set_P_in(pump, x);P_out(signal_fw)), ！set_P_in(pump,x)改变泵浦信道功率；P_out(signal_fw)输出前向信号光 VS ECD;u4c  
  step = 5, 7NT} Zwf  
  color = blue, p({@t=L3g  
  width = 3, dO2?&f  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 cA4?[F  
  finish set_P_in(pump, P_pump_in) r3' DXP  
lbt8S.fx  
f: (set_P_in(pump,x); 100 * n_av(2)),   ！改变泵浦信号功率对能级2上激活粒子占比的影响 dDl+  
  yscale = 2, rz&V.,s  
  step = 5, 5>%^"f  
  color = magenta, M/.M~/~  
  width = 3, tik*[1it  
  "population of level 2 (%, rightscale)", J/Y9X,  
  finish set_P_in(pump, P_pump_in) ,m`&J?  
YC 4c-M  
f: (set_P_in(pump,x); 100 * n_av(3)),   ！改变泵浦信号功率对能级3上激活粒子占比的影响 ~),%w*L  
  yscale = 2, ,_(=w.F   
  step = 5, NvIg,@}  
  color = red, rG~W=!bj  
  width = 3, "4WnDd5"  
  "population of level 3 (%, rightscale)", U}X'
RCM  
  finish set_P_in(pump, P_pump_in) zP0<4E$M`  
"zNS6I?rzE  
0$`pYW]  
; ------------- lU Zj  
diagram 3:                         ！输出图表3 ,2Ed^!`  
vA:ZR=)F  
"Variation ofthe Fiber Length" p#4*:rpq4  
J&h59dm-  
x: 0.1, 5 \6a' p Q,  
"fiber length(m)", @x mIG>`7`7N  
y: 0, 10 ulN1z  
"opticalpowers (W)", @y {~51h}>b#  
frame [-l>fP0  
hx $~:ZzZO  
hy @Yb8CB  
S"Vr+x?  
f: (set_L(x);P_out(signal_fw)),     ！改变光纤长度对信号光输出功率的影响 :,p3&2I  
  step = 20,             : ^}!"4{  
  color = blue, @ ^F{  
  width = 3, {}'Jr1  
  "signal output" mp sX4  
9(HGe+R4o  
;f: (set_L(x);P_out(pump)),                     ！改变光纤长度对泵浦信号输出功率的影响 6@#=z  
   step = 20, color = red, width = 3,"residual pump" 4IW90"uc  
R6 ej  
! set_L(L_f) {restore the original fiber length } H&*&n}vh5y  
}T}c%p  
{-7ovH?  
; ------------- T7ShE-X  
diagram 4:                                  ！输出图表4 _+)
OL-  
n3V$Xtxw  
"TransverseProfiles" 9({ 9r[U  
2<0".5+I  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) P;y!Y/$C  
^|h_[>  
x: 0, 1.4 * r_co /um 3VMaD@nYa  
"radialposition (µm)", @x @/As|)  
y: 0, 1.2 * I_max *cm^2 dmkGIg}  
"intensity (W/ cm&sup2;)", @y S]fkA6v  
y2: 0, 1.3 * N_Tm N!?~Dgw  
frame 0nI*9  
hx $ta"Ug.z  
hy M^l%*QF[,q  
\hlS?uD\  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 h Ks  
  yscale = 2, obbg#,  
  color = gray, 7w5l[a/  
  width = 3, :G9d,B7*  
  maxconnect = 1, {Gfsiz6  
  "N_dop (right scale)" .aWwJZ=[  
(mi=I3A(  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 Gz\wmH&rVz  
  color = red, fRk'\jzT  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 WQw11uMt@q  
  width = 3, 0.!vp?  
  "pump" eUa:@cA  
~Odclrs  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 uW}M1kq?+l  
  color = blue, 2" v{  
  maxconnect = 1, c2GTN"  
  width = 3, Ygfy;G%  
  "signal" g(jn /Cx  
]B&jMj~y&  
k+@ :+RL  
; ------------- I)%bOK]  
diagram 5:                                  ！输出图表5 I)3LJK  
fWg3gRI  
"TransitionCross-sections" XI ><;#  
#cD$ DA  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) %AT/g&M&1#  
4rCw#mVtB  
x: 1450, 2050
-DZ5nx  
"wavelength(nm)", @x ;L],i<F  
y: 0, 0.6 w1F)R^tU  
"cross-sections(1e-24 m&sup2;)", @y N-p||u  
frame KxJDAP  
hx 54]UfmT%I  
hy 'UCClj;?K  
|U~\;m@  
f: s12_Tm(x * nm) /1e-24,      ！Tm³⁺吸收截面与波长的关系 A i#~Eu*  
  color = red, Kx;la  
  width = 3, c; 1f$$>b  
  "absorption" b
9Eb"  
f: s21_Tm(x * nm) /1e-24,  ！Tm³⁺发射截面与波长的关系 aNICSxDN  
  color = blue, @%MGLR{pH  
  width = 3, .q 4FGPWz  
  "emission" uXGAcUx(  
T%PUV \LV  

感谢，视频上有点看不清楚