[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,M1Q~u%.  
Demo for program"RP Fiber Power": thulium-doped fiber laser, AfaoFn+  
pumped at 790 nm. Across-relaxation process allows for efficient [7+dZL[  
population of theupper laser level. s6HfN'  
*)            ！（*  *）注释语句 J69B1Yi  
B.ar!*X  
diagram shown: 1,2,3,4,5  ！指定输出图表 a(|,KWHn  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 ,enU`}9V*  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 Lk8NjK6  
; 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 Dxx`<=&g  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 y7LT;`A  
; 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 AfqthI$*m  
ns}"[44C}l  
include"Units.inc"         ！读取“Units.inc”文件中内容 ,nnVHBN  
r)/nx@x  
include"Tm-silicate.inc"    ！读取光谱数据 4)OM58e}  
]*\m@lWu  
; Basic fiberparameters:    ！定义基本光纤参数 ZL^ svGy  
L_f := 4 { fiberlength }      ！光纤长度 w.0
:#4  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 AriW&E  
r_co := 6 um { coreradius }                ！纤芯半径 jv5Os-  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 I7@g,~s  
&LM ^,xx}  
; Parameters of thechannels:                ！定义光信道 d2=Z=udd  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm )m4O7'2G  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 bPhbd  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W uHu(
 
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um W%&'EJ)62  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 t^KoqJ  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0
tI;pdR]  
*(*
3/P4D  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm qR>"r"Fq  
w_s := 7 um                          ！信号光的半径 ~L3]Wa.  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 0f]LOg  
loss_s := 0                            ！信号光寄生损耗为0 D@ R>gqb  
Smjg[  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 $Eh8s(  
q7-.-k<dQ  
; 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 ET:B"  
calc <RPy   
  begin 25-5X3(>j=  
    global allow all;                   ！声明全局变量 LI/;`Y=  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 Ej7>ywlW  
    add_ring(r_co, N_Tm); dLnu\bSF  
    def_ionsystem();              ！光谱数据函数 yG%<LP2p@f  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 & ~*qTojj  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 @!MhVNS_<  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 \8HLQly|@  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 /N?vVp  
    finish_fiber();                                   q(YFt*(;w  
  end; @2eV^eO9  
'D1Sm&M2%e  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 &8^ch,+pD  
show "Outputpowers:"                                   ！输出字符串Output powers： 4Bc<  
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） WymBjDos:  
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） zJCm0HLJ  
Gi*GFv%xB  
XDM~H  
; ------------- (}:n#|,{M  
diagram 1:                   !输出图表1 wn-{Vkpm  
 SK&?s`  
"Powers vs.Position"          ！图表名称 Bx&F*a;5  
(RtjD`e}  
x: 0, L_f                      ！命令x: 定义x坐标范围 }
M+2 ,#l  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 ZZJXd+Q}  
y: 0, 15                      ！命令y: 定义y坐标范围 ^>H+#@R  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 eKj'[2G@/  
frame          ！frame改变坐标系的设置 ;p U=>  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） 'CkN  
hx             ！平行于x方向网格 &GetRDr  
hy              ！平行于y方向网格 A0hfy|1#L  
FA#?+kd  
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 jh|4Y(  
  color = red,  ！图形颜色 rDvz2
p"R  
  width = 3,   ！width线条宽度 7=gv4arRwt  
  "pump"       ！相应的文本字符串标签 K0bh;I  
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 y!;PBsU%Sx  
  color = blue,     fvUD'sx  
  width = 3, =Lyo]8>,X  
  "fw signal" Uq8=R)1<|d  
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 !o k6*m  
  color = blue, jj&4Sv#>  
  style = fdashed, 1FO T  
  width = 3, J|D$  
  "bw signal" [Q+qu>&HB7  
iH#b"h{w  
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 3-T}8VsiP  
  yscale = 2,            ！第二个y轴的缩放比例 ag \d4y6  
  color = magenta, 3>I  
  width = 3, 01P ~K|s  
  style = fdashed, QV@NA@;XZ  
  "n2 (%, right scale)" i$Sq.NU  
dU4G!  
f: 100 * n(x, 3),          ！n(x ,3) 函数是计算x位置处激活粒子数在能级3上的占比 ZX Sl+k.  
  yscale = 2, #ErIot  
  color = red, OSsxO(;g  
  width = 3, nfV32D|3  
  style = fdashed, l`}Ag8Q  
  "n3 (%, right scale)" cIIt ;q[  
k;?Oi?]  
dT9ekNQB  
; -------------
uDZ$'a  
diagram 2:                    ！输出图表2 +.RC{o,  
yQXHEB  
"Variation ofthe Pump Power" (^Q:zU  
{#c**' 4  
x: 0, 10 C;3>q*Am4  
"pump inputpower (W)", @x MGmUgc  
y: 0, 10 ca!=D $  
y2: 0, 100 =`l).GnN2`  
frame 27NhYDo  
hx dK=<%)N  
hy y+PiH  
legpos 150, 150 { fmY_T[Q8  
{0#p,l  
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 b(Ev:  
  step = 5, N{(Q,+ ~  
  color = blue, nnZ|oEF  
  width = 3,
DjX*2O  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 8jn
z;;|  
  finish set_P_in(pump, P_pump_in) ,;2x.We  
)/hb9+S  
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 N1LZXXY{  
  yscale = 2, "^~>aVuXf  
  step = 5, z>f>B6  
  color = magenta, ET&Q}UOE  
  width = 3, @?w8XHEa|  
  "population of level 2 (%, rightscale)", a^*@j:[  
  finish set_P_in(pump, P_pump_in) {cNH|  
qQ_o>+3VAy  
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 )cMW,  
  yscale = 2, #\[
((y:q  
  step = 5, .i7bI2^  
  color = red, _l`s}yC  
  width = 3, @Ik@1  
  "population of level 3 (%, rightscale)", LZCz
iW  
  finish set_P_in(pump, P_pump_in) u,d@oF(=  
qGE?[\t[6  
}- Jw"|^W  
; ------------- `z=I}6){  
diagram 3:                         ！输出图表3 bIP'(B#1K  
;
plzJ6>  
"Variation ofthe Fiber Length" [S}o[v\  
B@,L83  
x: 0.1, 5 Q&Rj)1!  
"fiber length(m)", @x !~{AF|2f  
y: 0, 10 OOEmXb]8  
"opticalpowers (W)", @y 7DU"QeLeb  
frame 
?w}E/(r  
hx Fn8d;%C  
hy ?s<'3I{F`  
w/KCuW<  
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 v@43%`"Gj  
  step = 20,             bBQ1~ R  
  color = blue, [8k7-}[  
  width = 3, TB]Bl.  
  "signal output" kpM5/=f/@  
m,e@bJ-  
;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 MS
mvQ  
   step = 20, color = red, width = 3,"residual pump" %5=XszS  
\(lt [=  
! set_L(L_f) {restore the original fiber length } $lj1924?^  
2EubMG  
4s<*rKm~  
; ------------- vG'JMzAm  
diagram 4:                                  ！输出图表4 ndkV(#wQS  
t(4%l4i;X  
"TransverseProfiles" U!"+~d)  
2WjQ-mM#  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) N/A.1W  
qY24Y  
x: 0, 1.4 * r_co /um 9w -t9X>X  
"radialposition (µm)", @x cS98%@DR  
y: 0, 1.2 * I_max *cm^2 6#+&_#9  
"intensity (W/ cm&sup2;)", @y Rx$5#K!%M  
y2: 0, 1.3 * N_Tm T4`.rnzyRb  
frame 6g*B=d(j  
hx I$4GM  
hy Kq|L:Z  
&~+lXNXF  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 Vwp fkD`  
  yscale = 2, V4GcW|P4y  
  color = gray, 2\ /(
!n  
  width = 3, taXS>*|B  
  maxconnect = 1, TxYxB1C)  
  "N_dop (right scale)" L;=<d  
JJ3(0 +  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 FAVw80?5k  
  color = red, uj$b/I>.'  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度
t)74(  
  width = 3, -Cxk#-sb#  
  "pump" O2E6F^.pYw  
j+:q:6=  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 NZ`( d  
  color = blue, A]2zK?|s  
  maxconnect = 1, vcsi@!  
  width = 3, ?]}1FP
 
  "signal" T<\Q4Coth  
{Slc6$  
I\O<XJO)_  
; ------------- ~S)o('  
diagram 5:                                  ！输出图表5 :qi"I;=6  
i,BE]w  
"TransitionCross-sections" QDS=M]  
0nS69tH  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) ~Rx[~a  
d#.9!m~.  
x: 1450, 2050 |q5R5m
Q  
"wavelength(nm)", @x Kw}-<y  
y: 0, 0.6 xI}h{AF7  
"cross-sections(1e-24 m&sup2;)", @y UBp0;)-  
frame )/h~csy:~  
hx xtyzy@)QL  
hy K oPTY^  
]R/VE
"-  
f: s12_Tm(x * nm) /1e-24,      ！Tm³⁺吸收截面与波长的关系 ]sJWiIe.  
  color = red, m M!H}|  
  width = 3, 2E^zQ>;01  
  "absorption" m/sAYF"  
f: s21_Tm(x * nm) /1e-24,  ！Tm³⁺发射截面与波长的关系 `#hdb=3  
  color = blue, 6;U]l.  
  width = 3, oJw~g[  
  "emission" 'u$e2^  
5An|#^]  

感谢，视频上有点看不清楚