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

(* ey3;rY1  
Demo for program"RP Fiber Power": thulium-doped fiber laser, :>GT<PPD;  
pumped at 790 nm. Across-relaxation process allows for efficient Gj(UA1~1  
population of theupper laser level. ||vQW\g  
*)            ！（*  *）注释语句 js8GK  
;3k6_ub  
diagram shown: 1,2,3,4,5  ！指定输出图表 uH?lj&  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 DU: sQS4  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 Zjh9jvsW  
; 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 | QI-gw  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 !B\[Q$  
; 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 w=H4#a?fc  
dwt<s[k  
include"Units.inc"         ！读取“Units.inc”文件中内容 >5!/&D.q  
Cb/?hT  
include"Tm-silicate.inc"    ！读取光谱数据 ofA6EmQ37  
|~3$L\X  
; Basic fiberparameters:    ！定义基本光纤参数 .+cYzS]!  
L_f := 4 { fiberlength }      ！光纤长度 v^_<K4N`  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 *>XY' -;2e  
r_co := 6 um { coreradius }                ！纤芯半径 6lc/_&
0  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 lt&30nf=  
H9Pe,eHs  
; Parameters of thechannels:                ！定义光信道 aE2 3[So  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm umWZ]8  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 8E!I9z  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W T6ZJSKM  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um y[!4M+jj  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 "@[xo7T  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 2)^[SpZ  
<#9zc'ED:  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm ^(0tNX/XD  
w_s := 7 um                          ！信号光的半径 S-:7P.#Q  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 tK|hC[  
loss_s := 0                            ！信号光寄生损耗为0 IJnr^S8  
 s!E-+Gw  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 ].2it{gF?b  
=w.#j-jR  
; 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 m&Mvb[  
calc =`X;fz  
  begin "Rp]2'?  
    global allow all;                   ！声明全局变量 ka&-tGg  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 \g}FoN&  
    add_ring(r_co, N_Tm); Hvq< _&2  
    def_ionsystem();              ！光谱数据函数 */L;6_  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 u0J+Nj9  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 yf=ek==  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 H\3CvFm  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 ~QsQ7SAs  
    finish_fiber();                                   xy|-{  
  end; 9CWUhS   
NoJo-vo*  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 j$]t`6gG  
show "Outputpowers:"                                   ！输出字符串Output powers： [21tT/  
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） A_%}kt (6  
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） uBks#Y*3$  
,U'Er#U  
=fHt|}.K  
; ------------- M{7EFTy!y  
diagram 1:                   !输出图表1 -c=IO(B/  
qgca4VV|z  
"Powers vs.Position"          ！图表名称 Y#6@0Nn[G  
I01On>"@7  
x: 0, L_f                      ！命令x: 定义x坐标范围 N_VAdNJ^:  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 .@APxeU  
y: 0, 15                      ！命令y: 定义y坐标范围 \+MR`\|3  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 \FTvN  
frame          ！frame改变坐标系的设置 ]'_z(s}  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） n37( sKG  
hx             ！平行于x方向网格 4:<0i0)5  
hy              ！平行于y方向网格 oUw-l_M]  
7B%@f9g  
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 #OWwg`AWv  
  color = red,  ！图形颜色 r+0)l:{.  
  width = 3,   ！width线条宽度 YQN=.Wtc  
  "pump"       ！相应的文本字符串标签 .(S,dG0P  
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 @;<w"j`r  
  color = blue,     &r<<4J(t  
  width = 3, h)wR[N]n  
  "fw signal" NE9e brK  
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 v&XG4 &  
  color = blue, !gf&l ^)  
  style = fdashed, p]+W1v}V!  
  width = 3, ooZ7HTP|  
  "bw signal" GN1cnM>`  
\\)-[4uC  
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 \k1Wh-3  
  yscale = 2,            ！第二个y轴的缩放比例 ydns_Z  
  color = magenta, (rwbF  
  width = 3, c= a+7>  
  style = fdashed, F'j:\F6C;  
  "n2 (%, right scale)" >;
W)tc,  
:za!!^  
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 6!"15dPN  
  yscale = 2, x(b&r g.-0  
  color = red, %okEN!=  
  width = 3, e#'`
I^8l  
  style = fdashed, cE*|8'rSf  
  "n3 (%, right scale)" |ntJ+  
@6D<D6`  
ufR |  
; ------------- _u:#2K$  
diagram 2:                    ！输出图表2 >leOyBEAR  
IeU.T@ $  
"Variation ofthe Pump Power" p-7dJ  
lHGv:TN  
x: 0, 10 s{q2C}=$?D  
"pump inputpower (W)", @x kcYR:;y  
y: 0, 10 g{J3Ba  
y2: 0, 100 FD@! z :  
frame _+;x4K;  
hx _>`0!mG  
hy ./g0T{&  
legpos 150, 150 GS{9MGl  
UJm`GO  
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 s=q+3NTv  
  step = 5, KcU,RTE  
  color = blue, nu3 A'E`'k  
  width = 3, FFQF0.@EBi  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签
?B}>
[
 
  finish set_P_in(pump, P_pump_in) ZbGyl}8ua  
vv8$u3H  
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 Z0'3.D,l  
  yscale = 2, ~clWG-i  
  step = 5, wk/->Rz  
  color = magenta, !.J~`Y'd_  
  width = 3, eQLa.0  
  "population of level 2 (%, rightscale)", =0:hrg+Zgx  
  finish set_P_in(pump, P_pump_in) >'T%=50YH  
K7l{&2>?  
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 ?eO|s5r  
  yscale = 2, ~J2Q0Jv  
  step = 5, )3 r1; ^W  
  color = red, @E)XT\;3  
  width = 3, ?SAi tQ3  
  "population of level 3 (%, rightscale)", f*
5"Jh@  
  finish set_P_in(pump, P_pump_in) ='JX_U`A^F  
~8X'p6  
ec0v
g.>p  
; ------------- _YJwF1e+M  
diagram 3:                         ！输出图表3 -?(RoWv@X&  
Ya. $x~  
"Variation ofthe Fiber Length" #X8[g_d
/  
Qd./G5CC  
x: 0.1, 5 bk?\=4B:E  
"fiber length(m)", @x ]@P*&FRcZ  
y: 0, 10 s_[?(Ip{  
"opticalpowers (W)", @y Kaa*;T![  
frame _SaK]7}m!  
hx S&Sf}uK  
hy 9j"\Lr*o"  
CL*%06QyE  
f: (set_L(x);P_out(signal_fw)),     ！改变光纤长度对信号光输出功率的影响 L~$RF {$  
  step = 20,             4TKi)0 #7  
  color = blue, xki"'

  
  width = 3, %;5hHRA  
  "signal output" >H1d9y+Z  
op*+fJHD  
;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 [GuDMl3hC  
   step = 20, color = red, width = 3,"residual pump" ?MYD}`Cv  
>guQY I@4,  
! set_L(L_f) {restore the original fiber length } kC0!`$<2f)  
o7+/v70D  
-
0
`hJ_(  
; ------------- p(G?  
diagram 4:                                  ！输出图表4 Ae#6=]V+^  
w}0Qy  
"TransverseProfiles" T42g4j/l~  
+Xp;T`,v  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) 6S<$7=$=  
zi ,Rk.  
x: 0, 1.4 * r_co /um k +Oq$Pi  
"radialposition (µm)", @x B`F82_O  
y: 0, 1.2 * I_max *cm^2 $-Rh
CnE  
"intensity (W/ cm&sup2;)", @y Lk9>7xY  
y2: 0, 1.3 * N_Tm .%rR  
frame ttnXEF  
hx 4.'EEuRw\}  
hy $ZRN#x@  
IT(c'}  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 h 3&:"*A2  
  yscale = 2, n@Ag`}  
  color = gray,  vt N5{C  
  width = 3, qM0MSwvC=  
  maxconnect = 1, yLx.*I^6  
  "N_dop (right scale)" deoM~r9s  
1Q5<6*QL"  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 (UZ*36@PJx  
  color = red, L\ %_<2  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 ~@8d[Tb  
  width = 3, 4AYc8Z#'  
  "pump" .;b
> T  
_kHpM:;.  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 x]oQl^F  
  color = blue, E/ZJ\@gzD  
  maxconnect = 1, <k](s  
  width = 3, 3ms/v:\  
  "signal" _6!/}Fm  
$:[BB,$  
R3n&o%$*  
; ------------- lrhAO"/1  
diagram 5:                                  ！输出图表5 e<4z)  
jtv Q<4  
"TransitionCross-sections" gKN_~{{OD  
Ye2];(M  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) P|4E1O  
RRqMwy>%  
x: 1450, 2050 rfRo*u2"  
"wavelength(nm)", @x cJEz>Z6[  
y: 0, 0.6 C..2y4bA}  
"cross-sections(1e-24 m&sup2;)", @y sjI[Vq  
frame ?d<:V.1U@  
hx 51qIo4$  
hy oks=|'&  
!rg0U<bO!  
f: s12_Tm(x * nm) /1e-24,      ！Tm³⁺吸收截面与波长的关系
m->%8{L  
  color = red, -]\E}Ti  
  width = 3, 3:joSQa  
  "absorption" {(}w4.!  
f: s21_Tm(x * nm) /1e-24,  ！Tm³⁺发射截面与波长的关系 SU O;  
  color = blue, yvWzc uL#  
  width = 3, s}#[*WOc  
  "emission" "42$AaS  
T[h}A"yK;  

感谢，视频上有点看不清楚