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

(* )/|6'L-2  
Demo for program"RP Fiber Power": thulium-doped fiber laser, J|~26lG  
pumped at 790 nm. Across-relaxation process allows for efficient ^p=L\S
J  
population of theupper laser level. &`!^Zq vG  
*)            ！（*  *）注释语句 [j9E pi(  
z" QJhCh7  
diagram shown: 1,2,3,4,5  ！指定输出图表 ig_2={Q@  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 ^b-18 ~s  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 h(' )"  
; 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 9|
WV~  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 la^ DjHA
$  
; 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 :c]`D>  
,
)fkr]`<  
include"Units.inc"         ！读取“Units.inc”文件中内容 Ee2c5C!|C  
HY}j!X  
include"Tm-silicate.inc"    ！读取光谱数据 I+;-p]~  
ra6o>lI(,  
; Basic fiberparameters:    ！定义基本光纤参数 rg QEUDEQ  
L_f := 4 { fiberlength }      ！光纤长度 hOk00az  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 <4`eQ
 
r_co := 6 um { coreradius }                ！纤芯半径 |qN'P}L  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 eon!CE0  
*"{&FEV  
; Parameters of thechannels:                ！定义光信道 KfY$ka[}"S  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm K_BPZ5
w  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 W/+K9S25  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W KMK`F{  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um 'vIx#k4D1  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 }1H=wg
>\  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 l!~
mxUb  
pwX C  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm { T]?o~W  
w_s := 7 um                          ！信号光的半径 0$vj!-Mb^j  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 s8gU7pT49  
loss_s := 0                            ！信号光寄生损耗为0 'mMjjG9  
(ywo a  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 s(2GFc  
5g ;ac~g  
; 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 Iy7pt~DJ,  
calc %$ceJ`%1e  
  begin 8cWZ"v  
    global allow all;                   ！声明全局变量 UlovXb  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 `,>wC+}  
    add_ring(r_co, N_Tm); 7C,T&g 1:  
    def_ionsystem();              ！光谱数据函数 v."Dnl  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 >'=MH2;  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 SZ!=`a]  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 -_^c6!i  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 ;</Lf=+Vm  
    finish_fiber();                                   0@=MOGQb  
  end; u<tk G B  
RDQ^dui
  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 s
d
0r'jb  
show "Outputpowers:"                                   ！输出字符串Output powers： }nx=e#[g%2  
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） EeQ5vqU  
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） f-RK,#
^?,  
Q9?t[ir  
8Jr?ZDf`  
; ------------- B|{I:[  
diagram 1:                   !输出图表1 cPF<D$B  
":W%,`@$  
"Powers vs.Position"          ！图表名称 >yK0iK{  
0~gO'*2P  
x: 0, L_f                      ！命令x: 定义x坐标范围 lC?Icn|o  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 sq0 PBEqq  
y: 0, 15                      ！命令y: 定义y坐标范围 lhLGG  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 X" R<J#4  
frame          ！frame改变坐标系的设置 r.3KPiYK  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） i6PM<X,{;  
hx             ！平行于x方向网格 _D!g4"  
hy              ！平行于y方向网格 )ZR+lX}  
^>$P)=O:v  
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 ^HA %q8| n  
  color = red,  ！图形颜色 $p* p  
  width = 3,   ！width线条宽度 \F6LZZ2Lv  
  "pump"       ！相应的文本字符串标签 '\DSTr: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 H#d:kilNy  
  color = blue,     d5j_6X  
  width = 3, Ukphd$3J=  
  "fw signal" %Kb9tHg  
f: P(signal_bw, x),   ！P(signal_bw ,x) 函数是计算x位置处的后向信号光功率 d
f*w>xS  
  color = blue, xK%=  
  style = fdashed, *TdnB'Gd  
  width = 3, 8\ha@&p  
  "bw signal" ?/#}ZZK^  
7S^""*Q^  
f: 100 * n(x, 2),    ！n(x ,2) 函数是计算x位置处激活粒子数在能级2上的占比 x%> e)L<  
  yscale = 2,            ！第二个y轴的缩放比例 P>QpvSd_#  
  color = magenta, A2H4k|8  
  width = 3, F@<0s&)1  
  style = fdashed, b'@we0V@S  
  "n2 (%, right scale)" ~%y@Xsot>  
]dPZ.r  
f: 100 * n(x, 3),          ！n(x ,3) 函数是计算x位置处激活粒子数在能级3上的占比 *JCQu0  
  yscale = 2, .V'V:;BE%  
  color = red, wo^Sy41bF  
  width = 3, 3TuC+'`G  
  style = fdashed, c9Es%@]  
  "n3 (%, right scale)" SS.j
L
)  
rnm03 '{  
MQ/ A]EeL  
; ------------- Q[ieaL6&  
diagram 2:                    ！输出图表2 Pt< s* (  
V9 }t0$LN  
"Variation ofthe Pump Power" %g"eV4j  
6)gd^{  
x: 0, 10 v6a]1B
  
"pump inputpower (W)", @x GJ(d
&o8  
y: 0, 10 <I*x0BM=  
y2: 0, 100 _O:WG&a6  
frame J]/}ojW3  
hx V~{ _3YY  
hy SpTdj^]4>  
legpos 150, 150 ni CE\B~  
-0HkTY  
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 #&!G"x
7  
  step = 5, 'C+;r?1!h  
  color = blue, "i)Yvh[y  
  width = 3, TQ :/RT  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 !UBO_X%dz  
  finish set_P_in(pump, P_pump_in) &x:JD1T}  
}qPhx6nP  
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 j0-McLc  
  yscale = 2, 9L eNe}9v  
  step = 5, uYO|5a<f~  
  color = magenta, *iXe^<6v  
  width = 3, V2&^!#=s  
  "population of level 2 (%, rightscale)", /!FWuRe^  
  finish set_P_in(pump, P_pump_in) EmVuwphv  
qB6dFl\ (  
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 WPu
z]Ty  
  yscale = 2, YhKZ|@  
  step = 5, y&T&1o  
  color = red, ]n1dp2aH  
  width = 3, mPZGA\  
  "population of level 3 (%, rightscale)", c$E)P$<j  
  finish set_P_in(pump, P_pump_in) SqPtWEq@P  
&rq{v!=7  
P1kB>"bR  
; ------------- A/*%J74v  
diagram 3:                         ！输出图表3 #~ v4caNx  
7G2PMe;$m  
"Variation ofthe Fiber Length" M7}Q=q\9
 
~XM[>M\qB  
x: 0.1, 5 T8J4C=?/  
"fiber length(m)", @x FVWfDQ$&v  
y: 0, 10 N0TeqOi4Y  
"opticalpowers (W)", @y [2Mbk~  
frame ,i}|5ozj4  
hx RNJFSD.  
hy 3 pWM~(#>-  
T3J'fjY  
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 {5Lj8N5  
  step = 20,             g$37;d3Tx  
  color = blue, ;6;H*Y0,|E  
  width = 3, s'I)A^i+  
  "signal output" EYzg%\HH  
:> -1'HC  
;f: (set_L(x);P_out(pump)),                     ！改变光纤长度对泵浦信号输出功率的影响 Ggm` ~fS  
   step = 20, color = red, width = 3,"residual pump" >wON\N0V_  
eb:A1f4L  
! set_L(L_f) {restore the original fiber length } mX# "+X|  
y2
Bh?>pg  
BNm4k7 ]M  
; ------------- {ShgJ;! Q  
diagram 4:                                  ！输出图表4 _kraMQ>  
AHh#Fx+K  
"TransverseProfiles" Q s(Bnb;  
Zc5 :]]  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) ,{}#8r`+*  
J\co1kO9/  
x: 0, 1.4 * r_co /um _GaJXWMbk  
"radialposition (µm)", @x , |E$'  
y: 0, 1.2 * I_max *cm^2 l
J  
"intensity (W/ cm&sup2;)", @y :R6Q=g=  
y2: 0, 1.3 * N_Tm C".1+Um  
frame 6vs3O  
hx v|t{1[C  
hy kyUl{Zj
 
Buc_9Kzw<+  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 I}
0_nge  
  yscale = 2, i?}>.$j  
  color = gray, Iin#Wd-/  
  width = 3, ur%$aX)  
  maxconnect = 1, [Eq<":)  
  "N_dop (right scale)" W Ox_y,  
p]|LV)R n  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 {[OwMk  
  color = red, ? Nj)6_&  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 /XpSe<3  
  width = 3, 4MvC]_&  
  "pump" M
gJ5B(c  
ocA]M=3~k  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 "~+.Af  
  color = blue, /'&;Q7!)  
  maxconnect = 1, fj']?a!m  
  width = 3, .Ao0;:;(2-  
  "signal" !vqC+o>@  
LsTffIP  
s@@1 *VQ  
; ------------- R{}qK r  
diagram 5:                                  ！输出图表5 ]|oJ)5P  
I48VNX  
"TransitionCross-sections" p8>%Mflf  
d0UZ+ RR#  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) d]B=*7]  
)2j:z#'>  
x: 1450, 2050 "dCzWFet  
"wavelength(nm)", @x aC\4}i<  
y: 0, 0.6 ?Myh7  
"cross-sections(1e-24 m&sup2;)", @y g:~+Pe  
frame f\o R:%  
hx #BJ\{"b_}z  
hy zJl_ t0  
otriif@+Z  
f: s12_Tm(x * nm) /1e-24,      ！Tm³⁺吸收截面与波长的关系 EZj1jpL  
  color = red, 9D_wG\g  
  width = 3, zG% |0  
  "absorption" (cV  
f: s21_Tm(x * nm) /1e-24,  ！Tm³⁺发射截面与波长的关系 v*TeTA %  
  color = blue, zy)i1d  
  width = 3, P[i
\e7mR  
  "emission" &?<AwtNN  
0X"\ a'M_  

感谢，视频上有点看不清楚