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

(* 
0+_;6  
Demo for program"RP Fiber Power": thulium-doped fiber laser, 54s90  
pumped at 790 nm. Across-relaxation process allows for efficient MpJ3*$Dr  
population of theupper laser level. PUd/|Rc/}  
*)            ！（*  *）注释语句 rb>2l3g*  
b!EqYT  
diagram shown: 1,2,3,4,5  ！指定输出图表 3)^2X  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 %3K'[2F  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 m[N&UM#  
; 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 Y\(?&7Aax  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 K_X(j$2Xc  
; 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 UG
]5Dxk  
z`dnS]q9  
include"Units.inc"         ！读取“Units.inc”文件中内容 BSEP*#s  
bGj<Dojl  
include"Tm-silicate.inc"    ！读取光谱数据 JJ_KfnH  
#g Rns  
; Basic fiberparameters:    ！定义基本光纤参数 G1,u{d-_  
L_f := 4 { fiberlength }      ！光纤长度 ;O .;i,#Z  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 $M4C4_oPy  
r_co := 6 um { coreradius }                ！纤芯半径 xaIe7.Z"xo  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 (b.Mtd  
DxP65wU  
; Parameters of thechannels:                ！定义光信道 7:C2xC  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm #vcQ =%;O  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 HN&]`cr;  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W cyI:dvg  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um DeN$YE#*  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 1
!ijRr  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 <ou=f
'  
aQ1n1OBr  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm ~Z9
7L  
w_s := 7 um                          ！信号光的半径 r
?Pk}Q  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 #W L>ha v  
loss_s := 0                            ！信号光寄生损耗为0 KZ/2W9r_,  
|e&hm ~R1  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 8{Wh4~|+  
M[=sQnnSFW  
; 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 <QK2Wc_}-"  
calc # 9ZO1\  
  begin n{%[G2.A  
    global allow all;                   ！声明全局变量 pH?"@  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 S'q4va"  
    add_ring(r_co, N_Tm); xC$CRzAe5p  
    def_ionsystem();              ！光谱数据函数 ZV:0:k.x  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 N..@}}  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 1ZfhDtK(  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 Z&y9m@  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 \XG\
 
    finish_fiber();                                   TUR2|J@n  
  end; _ 3jY,*  
Ni61o?]Nj  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 MSS0Sx<f  
show "Outputpowers:"                                   ！输出字符串Output powers： a#P
{[  
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） y/Q,[Uzk\  
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） OQsF$%*  
AkV8}>G?#A  
KrD?Z2x  
; ------------- 4ko(bW#jL  
diagram 1:                   !输出图表1 <o_(,,P%  
f.u+({"ql  
"Powers vs.Position"          ！图表名称 ^WIGd"^  
k*= #XbX  
x: 0, L_f                      ！命令x: 定义x坐标范围 ?{-y? %y  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 _WHGd&u  
y: 0, 15                      ！命令y: 定义y坐标范围 G9a6
$K)b  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 }JBLzk5|  
frame          ！frame改变坐标系的设置 d}]jw4  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） t>(}LV.  
hx             ！平行于x方向网格 #ZpR.$`k  
hy              ！平行于y方向网格 sJ)Pj?"\?  

[
e`6gGO  
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 BjCg!6`XF  
  color = red,  ！图形颜色 Z"'tJ3Y.~  
  width = 3,   ！width线条宽度 ioS(;2F  
  "pump"       ！相应的文本字符串标签 ;_=+h,n  
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 8Ir = @  
  color = blue,     +`~6Weay  
  width = 3, #R3|nL  
  "fw signal" AtW<e;!0te  
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
pX6PwM  
  color = blue, ygfUy  
  style = fdashed, $/;;}|hqi  
  width = 3, "~/O>.p  
  "bw signal" 5j$a3nH  
4z>SI\Ss  
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 ^N:bT;;$nZ  
  yscale = 2,            ！第二个y轴的缩放比例 ]Br6!U4~  
  color = magenta, `%S#XJU  
  width = 3, =-|,v*  
  style = fdashed, V'&`J
ZK6  
  "n2 (%, right scale)" xnD"LK  
z;ko )  
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 '?MT"G  
  yscale = 2, Ow4H7sl  
  color = red, %/Y;  
  width = 3, OtFGo8  
  style = fdashed, Z</.Ss 4  
  "n3 (%, right scale)" &F#K=R| .j  
$z5  
ct![eWsuB  
; ------------- wxSJ  
diagram 2:                    ！输出图表2 EgT?Hvx:  
,c9K]>8m`  
"Variation ofthe Pump Power" ?."YP[;  
+1=]93gP  
x: 0, 10 }MXC0Z~si  
"pump inputpower (W)", @x \RDS~u\d  
y: 0, 10 FA3YiX(-e  
y2: 0, 100 E|v9khN(].  
frame 8Xjp5  
hx Yb;$z'  
hy c}r"O8M  
legpos 150, 150 #cy;((zuB  
Th>ff)~e  
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 tzV^.QWm  
  step = 5, \o
lYv!f  
  color = blue, S{#L7S  
  width = 3, ;fGh]i  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 A{Dy3tm=  
  finish set_P_in(pump, P_pump_in) Js}1_K  
{IA3`y~  
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 ap|$8G  
  yscale = 2, H^r;,Q$9  
  step = 5, |Pj]sh[^Y  
  color = magenta, <Po$|$_~  
  width = 3, >JckN4v  
  "population of level 2 (%, rightscale)", rK} =<R  
  finish set_P_in(pump, P_pump_in) JsD|igqF-  
xfK@tLEZ-1  
f: (set_P_in(pump,x); 100 * n_av(3)),   ！改变泵浦信号功率对能级3上激活粒子占比的影响 LZH~VkK@m}  
  yscale = 2, 2U.'5uA"L  
  step = 5, @Tz}y"VG  
  color = red, <<l1zEf@  
  width = 3, zSo(+D &[  
  "population of level 3 (%, rightscale)", "cDMFu  
  finish set_P_in(pump, P_pump_in) &f($= 68  
+nU=)x?38  
hYB3tT  
; ------------- S-%itrB*  
diagram 3:                         ！输出图表3 wlsq[xP  
<kOdd)X  
"Variation ofthe Fiber Length" 8$`$24Wx  
n5>OZ
3 E@  
x: 0.1, 5 6%L#FSI  
"fiber length(m)", @x [D_s`'tg  
y: 0, 10 DrA\-G_7  
"opticalpowers (W)", @y BHNEP |=  
frame ^aR^M\38  
hx  BDfJ  
hy ,4--3 MU  
eY\w?pT2  
f: (set_L(x);P_out(signal_fw)),     ！改变光纤长度对信号光输出功率的影响 ]@{l<ExP  
  step = 20,             zw[ #B #  
  color = blue, =M9;`EmC  
  width = 3, R1vuf*A5,  
  "signal output" Q4Z
KgcC  
h,|. qfUk  
;f: (set_L(x);P_out(pump)),                     ！改变光纤长度对泵浦信号输出功率的影响 )}lO%B'K  
   step = 20, color = red, width = 3,"residual pump" d}Xb8SaE%c  
G3dA`3  
! set_L(L_f) {restore the original fiber length } D=@bPB
>  
OEnCN  
*BHp?cn;F2  
; ------------- R
4vf  
diagram 4:                                  ！输出图表4 t Z@OAPRx  
{5Sy=Y  
"TransverseProfiles" ~@mN
R^W-W  
9";qR,  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) N"8'=wB  
_E2
W%N  
x: 0, 1.4 * r_co /um # 11<=3Yj  
"radialposition (µm)", @x ek1<9"y  
y: 0, 1.2 * I_max *cm^2 `Z^\<{z  
"intensity (W/ cm&sup2;)", @y @%BsQm  
y2: 0, 1.3 * N_Tm sA2esA@C<o  
frame ~s*kuj'%+  
hx ZRj/lQ2D  
hy B$ jX%e{:S  
MO%+rf0~w  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 9AJ"C7  
  yscale = 2, ),J6:O
&  
  color = gray, _%G;^ b  
  width = 3, !v. <H]s)  
  maxconnect = 1, 6TDa#k5v  
  "N_dop (right scale)" pi5DDK  
I%l2_hs0V  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 bbT1p:RF  
  color = red, L~Y^O`c  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 (_]D\g~  
  width = 3, @MP;/o+  
  "pump" gg/2R?O]  
q$PO.#  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 Q^*4
FH!W  
  color = blue, u#UtPF7q  
  maxconnect = 1, &H[7UyC  
  width = 3, KW!
+Ws  
  "signal" fp}5QUm-  
P*
n/qj8h  
hP}-yW6]  
; ------------- YC(X= D  
diagram 5:                                  ！输出图表5 $[oRbH8g  
2!R+5^Iy  
"TransitionCross-sections" 
p'A43  
D$+g5u)  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) 3L36 2  
iJ`zWpj+{Q  
x: 1450, 2050 $,B;\PX  
"wavelength(nm)", @x 0g9y4z{H  
y: 0, 0.6 f@2F!  
"cross-sections(1e-24 m&sup2;)", @y "7eL&  
frame Ehxu`>@N  
hx %aV~RB#  
hy izzX$O[=:  
Y]7 6y>|e  
f: s12_Tm(x * nm) /1e-24,      ！Tm<sup>3+</sup>吸收截面与波长的关系 j2%fAs<  
  color = red, ^B1$|C D,  
  width = 3, `O5427Im  
  "absorption" c dWg_WBC  
f: s21_Tm(x * nm) /1e-24,  ！Tm³⁺发射截面与波长的关系 KciN"g|X  
  color = blue, djqw5kO:R  
  width = 3, N<b~,[yCd>  
  "emission" [=",R&uD$  
ZQ>Q=eCs 1  

感谢，视频上有点看不清楚