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

(* 60~>f)vu  
Demo for program"RP Fiber Power": thulium-doped fiber laser, Rr;LV<q+  
pumped at 790 nm. Across-relaxation process allows for efficient ;aK !eD$  
population of theupper laser level. ?(NT!es  
*)            ！（*  *）注释语句 QOh w  
+?5Uy
*$  
diagram shown: 1,2,3,4,5  ！指定输出图表 gC_s\WU  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 i h$@:^\  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 : `6$/DK  
; 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 Eagmafu  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 tp0!,ne*  
; 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 At
[n<8_|  
%L\{kUam  
include"Units.inc"         ！读取“Units.inc”文件中内容 B:A1W{l  
LnI{S{]wDh  
include"Tm-silicate.inc"    ！读取光谱数据 :af;yu  
peTO-x^a-  
; Basic fiberparameters:    ！定义基本光纤参数 gcW{]0%L^  
L_f := 4 { fiberlength }      ！光纤长度 mb~=Xyk&  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 zmL~]!~&  
r_co := 6 um { coreradius }                ！纤芯半径 ^;CR0.4  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 !8"$d_=h  
X@h^T>["  
; Parameters of thechannels:                ！定义光信道 il>x!)?o  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm rPo\Dz  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 x(3 I?#kE  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W 1y)$[e   
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um '[=yfh  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 gM
;)  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 m
sqxPC^I  
;oY(I7  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm \Sq"3_m4T  
w_s := 7 um                          ！信号光的半径 74}eF)(me  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 we H@S  
loss_s := 0                            ！信号光寄生损耗为0 mOz&6T<|  
mS)|6=Y  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 HV$9b~(  
lEyG9Xvi  
; Function for defining themodel:   ！定义模型函数，一定要有calc命令，否则函数只会被定义，但不会被执行 |B1;l<|`  
calc 9#EHXgz  
  begin ?LV-W  
    global allow all;                   ！声明全局变量 <9d-Hz  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 &Xn8oe  
    add_ring(r_co, N_Tm); #E$Z[G]  
    def_ionsystem();              ！光谱数据函数 2Pem%HE~P  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 /mMAwx  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 [ n0##/  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 Q2[prrk%j  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 1o;g1Z/  
    finish_fiber();                                   A'~%
_}  
  end; Mg a@JA"  
~_l6dDJ  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 _Ra<|NVQh  
show "Outputpowers:"                                   ！输出字符串Output powers： dK J@{d  
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） x:A-p..e  
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） ElEv(>G*  
##EB; Y  
H4}%;m%  
; ------------- O ':0V  
diagram 1:                   !输出图表1 R%Ui6dCLo  
tL={y*  
"Powers vs.Position"          ！图表名称 't0+:o">:  
f.aB?\"f6  
x: 0, L_f                      ！命令x: 定义x坐标范围 >op:0on]}  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 z_:eM7]jv  
y: 0, 15                      ！命令y: 定义y坐标范围 }XGMa?WR  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 LC,*H0  
frame          ！frame改变坐标系的设置 4GU/V\e|  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） n) _dH/"  
hx             ！平行于x方向网格 2qs>Bshf  
hy              ！平行于y方向网格 Hhe{+W@~  
ZR;8rZ](
 
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 jb|mip@` <  
  color = red,  ！图形颜色 ?Do^stq'4  
  width = 3,   ！width线条宽度 hzT{3YtY2  
  "pump"       ！相应的文本字符串标签 ,67"C2Y  
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 biK)&6|`sa  
  color = blue,     Pl rkgS0J  
  width = 3, ib
d$%;bX3  
  "fw signal" P"(z jG9-  
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 KGV.S  
  color = blue, m,W) N9 M  
  style = fdashed, F_A%8)N  
  width = 3, G"o!}  
  "bw signal" =jg#fdM -  
jd%Len&p  
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=5C  
  yscale = 2,            ！第二个y轴的缩放比例 mu6039qy  
  color = magenta, (C8 U   
  width = 3, ]pW86L%  
  style = fdashed, H~A"C'P3#  
  "n2 (%, right scale)" ?M*7@t@  
o!aLZ3#X  
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 C`\9cej  
  yscale = 2, 9R9__w;  
  color = red, 0HGlf  
  width = 3, S~KS9E~\  
  style = fdashed, y[: ~CL  
  "n3 (%, right scale)" ,Bisu:v6FW  
X}ZlWJ  
Vy-28icZ`  
; ------------- x(L(l=^"  
diagram 2:                    ！输出图表2 4p.^'2m  
' |&>/dyq  
"Variation ofthe Pump Power" :.*HQt9N  
D`6iDit  
x: 0, 10 95=gY  
"pump inputpower (W)", @x !Eq#[Gs  
y: 0, 10 WfTD7?\dw  
y2: 0, 100 t)YUPDQ@J  
frame rh@r\H@j  
hx # ;K,,ku x  
hy Vclr)}5  
legpos 150, 150 >~_Jq|KBB  
MkwU<ae AB  
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 qAoAUDm  
  step = 5, PU W[e%  
  color = blue, {Fbg]'FQ
 
  width = 3, > 2#%$lX6  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 93j{.0]X  
  finish set_P_in(pump, P_pump_in) 5sCFzo<=vh  
+a%xyD:.?  
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 XAe\s`  
  yscale = 2, 2 P=[  
  step = 5, j&5G\6:  
  color = magenta, ((XE\V\}Z  
  width = 3, 089 k.WG  
  "population of level 2 (%, rightscale)", 7p
aUpQit  
  finish set_P_in(pump, P_pump_in) #ZJMlJ:q`"  
aX;A==>  
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 I,b9t\(6  
  yscale = 2, zh\$t]d<I  
  step = 5, @5xu>gKn  
  color = red, Z7fg 25  
  width = 3, sYJL-2JX  
  "population of level 3 (%, rightscale)", .u l 53 m  
  finish set_P_in(pump, P_pump_in) `H\)e%]  
&iNwvA%9D  
>!L&>OOx  
; ------------- CK0l9#g  
diagram 3:                         ！输出图表3 Us,)]W.S  
`\bT'~P  
"Variation ofthe Fiber Length" \q "N/$5{f  
RT^v:paNT2  
x: 0.1, 5 4:7mK/Z  
"fiber length(m)", @x gY(1,+0-  
y: 0, 10 R_^/,^1  
"opticalpowers (W)", @y {CtR+4KD  
frame  4*TmlY  
hx i
ib  
hy (luKn&826  
zvY+R\,in  
f: (set_L(x);P_out(signal_fw)),     ！改变光纤长度对信号光输出功率的影响 XM/vDdR  
  step = 20,             iXFP5a>|  
  color = blue, *RWm47  
  width = 3, 5+- I5HX|~  
  "signal output" 9xFO]Y"  
P`S@n/}  
;f: (set_L(x);P_out(pump)),                     ！改变光纤长度对泵浦信号输出功率的影响 2C$R4:Ssw)  
   step = 20, color = red, width = 3,"residual pump" Ts9ktPlm  
x&Cp> +i  
! set_L(L_f) {restore the original fiber length } o%`Xa#*Ly  
nPN?kO=]  
<P_ea/5:|  
; ------------- x({H{'9?  
diagram 4:                                  ！输出图表4 :=Kx/E:1  
fuUm}N7  
"TransverseProfiles" gd7^3q[$h  
@%hCAm  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) JBC$Ku  
4nqoZk^R  
x: 0, 1.4 * r_co /um &
H||&Z[pk  
"radialposition (µm)", @x krB'9r<wa`  
y: 0, 1.2 * I_max *cm^2 oH#v6{y  
"intensity (W/ cm&sup2;)", @y }tG3tz0%fX  
y2: 0, 1.3 * N_Tm + H_WlYg-  
frame 3QXjD/h  
hx OtTBErQNF  
hy 2;$k(x]  
!TKkec8$  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 usFfMF X  
  yscale = 2, egk7O4zwP  
  color = gray, . ]@=es  
  width = 3, C3'rtY.  
  maxconnect = 1, 17|np2~  
  "N_dop (right scale)" J=W0Xi!  
71fk.16  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 W_`A"WdT.  
  color = red, (=4W-z7  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 5fJ[}~  
  width = 3, \4d.sy0&>-  
  "pump" C&~1M}I  
Ju2l?RrX  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 \HZ9S=  
  color = blue, ?GA&f2]a  
  maxconnect = 1, /) 4GSC}Gg  
  width = 3, 4|?{VQ  
  "signal" *sw7niw  
S4^N^lQ]  
23!;}zHp  
; ------------- uI~S=;o  
diagram 5:                                  ！输出图表5 nH|,T%  
D*P
Yr{z'  
"TransitionCross-sections" qZv =  
+rXF{@ l  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) !7bw5H  
pd[ncL  
x: 1450, 2050 .|qK+Hnc  
"wavelength(nm)", @x <A5]]{9 +  
y: 0, 0.6 e({9]  
"cross-sections(1e-24 m&sup2;)", @y H( jXI  
frame i_Re*  
hx Z?P~z07  
hy lbdTQ6R  
YevyN\,}V!  
f: s12_Tm(x * nm) /1e-24,      ！Tm<sup>3+</sup>吸收截面与波长的关系 ~[WF_NU1y  
  color = red, gi/@j  
  width = 3, )d\j I  
  "absorption" "9EE1];NT  
f: s21_Tm(x * nm) /1e-24,  ！Tm<sup>3+</sup>发射截面与波长的关系 j%
u-dr  
  color = blue, uMb>xxf  
  width = 3,
J5p"7bc  
  "emission" #11NPo9  
{`=0 |oP}  

感谢，视频上有点看不清楚