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

(* ?r^>Vk}  
Demo for program"RP Fiber Power": thulium-doped fiber laser, ]9hhAT44  
pumped at 790 nm. Across-relaxation process allows for efficient #Z}YQ$g  
population of theupper laser level. oC(.u?  
*)            ！（*  *）注释语句 C40W@*6S2  
m<|fdS'@  
diagram shown: 1,2,3,4,5  ！指定输出图表 {$v>3FG  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 Y2(,E e2  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 Fc a_(jw  
; 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 |/!RN[<   
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 v|2+7N:[;  
; 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 EK
zYL#(i  
/(Ryh
6M  
include"Units.inc"         ！读取“Units.inc”文件中内容 `5Em: 8 M  
5>rjL;  
include"Tm-silicate.inc"    ！读取光谱数据 c~ Q5A  
BU=Ta$#BZ  
; Basic fiberparameters:    ！定义基本光纤参数 -m Sf`1l0  
L_f := 4 { fiberlength }      ！光纤长度 ]wV_xZ)l^A  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 )7a 4yTg!~  
r_co := 6 um { coreradius }                ！纤芯半径 USbFUHdDc  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 `B7?F$J  
#=I5_
u  
; Parameters of thechannels:                ！定义光信道 \7 }{\hY-  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm .$ 5*v  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 oNRp  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W tflUy\H>  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um Klqte*!  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 p.!p6ve){  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 VBe&of+  
gdG#;T'  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm ~lH2#u>g  
w_s := 7 um                          ！信号光的半径 }K9Ji]tOK:  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 .<-~k@ P  
loss_s := 0                            ！信号光寄生损耗为0 Lq{/r+tt/  
dt(Lp_&v  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 H:X(><J  
\,yg@R  
; 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 OCI{)r<O2m  
calc n$ZxN"q <  
  begin fx/If  
    global allow all;                   ！声明全局变量 Xvn \~Vr  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 l7uEUMV  
    add_ring(r_co, N_Tm);
>~@ABLp6  
    def_ionsystem();              ！光谱数据函数 |=EwZmj-c  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 B[[1=  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 ". wG~H  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 Hu$JCB-%  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 qX*Xo[Xp  
    finish_fiber();                                   ?f=7F %  
  end; CpC6vA.R  
10$:^  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 _)^`+{N<  
show "Outputpowers:"                                   ！输出字符串Output powers： kI/%|L%6D  
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） Sigu p#.p  
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） )Tad]Hd"W  
HG[gJ7  
RJLhR_t7n  
; ------------- *jo1?  
diagram 1:                   !输出图表1 $ Bdxu  
@{x+ln1r  
"Powers vs.Position"          ！图表名称 n]bxG8~t  
mp17d$R-  
x: 0, L_f                      ！命令x: 定义x坐标范围 @1)C3(=A  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 l ?gh7m_ej  
y: 0, 15                      ！命令y: 定义y坐标范围 5 OF*PBZ  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 luV_  
frame          ！frame改变坐标系的设置 $lf\1)B~*  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） `-<m#HF:)d  
hx             ！平行于x方向网格 ]`eJSk.  
hy              ！平行于y方向网格 +g8uV hC  
"gq_^&  
f: P(pump, x),    ！命令f: 定义函数图；P(pump, x)函数是计算x位置处的泵浦光功率 l[{Ci|4  
  color = red,  ！图形颜色 rOXh?r  
  width = 3,   ！width线条宽度 [
300F=R  
  "pump"       ！相应的文本字符串标签 tq5o  
f: P(signal_fw, x),  ！P(signal_fw ,x) 函数是计算x位置处的前向信号光功率 t[x[X4  
  color = blue,     4mF=A$Q_/  
  width = 3, `;#I_R_K  
  "fw signal" K<7 Db4H  
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 ?XO}6q<tM  
  color = blue, f`_6X~
 p  
  style = fdashed, k{pn~)xg  
  width = 3, o1@. <Q+}  
  "bw signal" }o9(Q8  
KPs @v@5M  
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 j:'!P<#  
  yscale = 2,            ！第二个y轴的缩放比例 +/2:  
  color = magenta, u^&,~n@n7  
  width = 3, ~aRcA|`  
  style = fdashed, w0$l3^}z  
  "n2 (%, right scale)" Lcy>!3q3~  
e+P|PW  
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 ({p@Ay  
  yscale = 2, DwH=ln=  
  color = red, ,Y2){8#l  
  width = 3, -xc'P,`  
  style = fdashed, 407;M%?'A  
  "n3 (%, right scale)" aFwfF^\(|,  
%dA7`7j  
0Kenyn4?  
; ------------- p4I6oS`/.  
diagram 2:                    ！输出图表2 iC\t@BVS  
^
tFgkzXm  
"Variation ofthe Pump Power" <D{_q.`vA  
<=7^D  
x: 0, 10 6d|%8.q1  
"pump inputpower (W)", @x sBD\;\I  
y: 0, 10 NI% ()  
y2: 0, 100 oi}\;TG  
frame Bc2PF;n  
hx  p(Bn!  
hy F6\r"63  
legpos 150, 150 
pM'AhzS  
s7TV@Y)  
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 EL-1o02-  
  step = 5, Cn(0ID+3f  
  color = blue, WL5!H.q  
  width = 3, } ~#^FFe  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 9b*1-1
"  
  finish set_P_in(pump, P_pump_in) nH]F$'rtA  
JK9}Kb};  
f: (set_P_in(pump,x); 100 * n_av(2)),   ！改变泵浦信号功率对能级2上激活粒子占比的影响 nFfwVqV  
  yscale = 2, w/m~#`a  
  step = 5, 4`+hX'  
  color = magenta, K# dV.  
  width = 3, y1:#0  
  "population of level 2 (%, rightscale)", kKg%[zXS  
  finish set_P_in(pump, P_pump_in) [{!5{k!  
xlWT
Hn!j  
f: (set_P_in(pump,x); 100 * n_av(3)),   ！改变泵浦信号功率对能级3上激活粒子占比的影响 O<v9i4*  
  yscale = 2, RW. >;|m  
  step = 5, Gd5J<K  
  color = red, (j;6}@  
  width = 3, ?krgZ;Jj  
  "population of level 3 (%, rightscale)", y}bE'Od  
  finish set_P_in(pump, P_pump_in) H:HJHd"W  
H|iY<7@  
13nXvYo'  
; ------------- #7A_p8  
diagram 3:                         ！输出图表3 pZ4]oK\*  
X6dv+&=?  
"Variation ofthe Fiber Length" p KF>_\   
/n SmGAO  
x: 0.1, 5 e.|_=Gd2/  
"fiber length(m)", @x }6Uw4D61  
y: 0, 10 z2QZ;ZjvRS  
"opticalpowers (W)", @y *.DTcV  
frame &zYo   
hx c{u~=24;%#  
hy z@0*QZ.y1  
v*7lJNN.  
f: (set_L(x);P_out(signal_fw)),     ！改变光纤长度对信号光输出功率的影响 e/;chMCq  
  step = 20,             OxraaN`  
  color = blue, ~D)!zQkD  
  width = 3,  TVP.)%  
  "signal output" Vnv9<=R  
~agzp`!M  
;f: (set_L(x);P_out(pump)),                     ！改变光纤长度对泵浦信号输出功率的影响 3S'juHTe  
   step = 20, color = red, width = 3,"residual pump" @{Q[M3l  
}bVWV0Aeim  
! set_L(L_f) {restore the original fiber length } +89s+4Jn  
oiq7I@Y`x  
+)Pv6Zog[  
; ------------- jyt#C7mj-A  
diagram 4:                                  ！输出图表4 I%NPc4p  
e:Zc-  
"TransverseProfiles" AqKl}8  
I9`R LSn  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) w$cic  
=x4:jas  
x: 0, 1.4 * r_co /um /
QsFeH  
"radialposition (µm)", @x <
ealt  
y: 0, 1.2 * I_max *cm^2 ''Y}Q"  
"intensity (W/ cm&sup2;)", @y 3 G?^/nB  
y2: 0, 1.3 * N_Tm yVyh'd:Ik  
frame "bRg_]\q6  
hx /]Fs3uf  
hy AT:T%a:G?  
AFWcTz6#d  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 \:8eN}B  
  yscale = 2, @83h/Wcxd  
  color = gray, :4"SJ  
  width = 3, U/2g N H  
  maxconnect = 1, }TZ5/zn.Dw  
  "N_dop (right scale)" )K8k3]y&  
4'W|'4'b  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 zv]-(<B  
  color = red, zn T85#]\@  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 %:n1S]Vr  
  width = 3, YWSo:)LY  
  "pump" ,uD F#xjl,  
hv'~S  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 h94SLj]  
  color = blue, OYJy;u3"  
  maxconnect = 1, 8{HeHU  
  width = 3, EOrWax@k$}  
  "signal" w0Fi~
:b  
<R7*
00  
:".:Wd  
; ------------- 22
\Buk}?  
diagram 5:                                  ！输出图表5 UAT46  
J'4{+Q_pa  
"TransitionCross-sections" XnQd(B`M  
BciwS_Qx  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) )p"37Ct?  
v.)'be*u  
x: 1450, 2050 $V~r*#$.  
"wavelength(nm)", @x a}a_&rf~Z  
y: 0, 0.6 2#LcL  
"cross-sections(1e-24 m&sup2;)", @y >\K<q>*  
frame =y8HOT}8  
hx |2XEt\P  
hy 5+GW%U/  
!arcQ:T@G  
f: s12_Tm(x * nm) /1e-24,      ！Tm³⁺吸收截面与波长的关系 -[s*R%w  
  color = red, k0?4vA  
  width = 3, g# :|Mjgh  
  "absorption" -Q;5A;sr2  
f: s21_Tm(x * nm) /1e-24,  ！Tm³⁺发射截面与波长的关系 ?L#C'Lz2+  
  color = blue, 2](R}  
  width = 3, )_b#c+  
  "emission" MQ2gzKw>  
gh}FZs5P  

感谢，视频上有点看不清楚