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

(* [sJ f)<  
Demo for program"RP Fiber Power": thulium-doped fiber laser, ]vRte!QJ;  
pumped at 790 nm. Across-relaxation process allows for efficient gV@FT|j!i  
population of theupper laser level. Yl%1e|WV  
*)            ！（*  *）注释语句 ^6j:
lL  
Iko1%GJ1Z  
diagram shown: 1,2,3,4,5  ！指定输出图表 rZ`ob x\S  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 8&?Kg>M  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 N>##}i  
; 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 Zg1=g_xY  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置
FrBoE#  
; 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 =.`(KXT  
6L[Yn?;  
include"Units.inc"         ！读取“Units.inc”文件中内容 1y@d`k`t:  
yJ*`OU#  
include"Tm-silicate.inc"    ！读取光谱数据 d_s=5+Yj  
ApHs`0=(  
; Basic fiberparameters:    ！定义基本光纤参数 {`,dWjy{%  
L_f := 4 { fiberlength }      ！光纤长度 ~t7?5b?*\  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 Hx[YHu KL^  
r_co := 6 um { coreradius }                ！纤芯半径 &R+/Ie#0dz  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 wSoIU,I  
Vg'vL[Y  
; Parameters of thechannels:                ！定义光信道 x`n$4a'7b  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm B1)gudP`  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 xUl=N   
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W
*R1m=  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um SQ%B"1&$D  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 |Iei!jm  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 ~I[Z2&I  
q6DuLFatc*  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm V4I5PPz~  
w_s := 7 um                          ！信号光的半径 4/UY*Us&  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 UhKC:<%  
loss_s := 0                            ！信号光寄生损耗为0 Y,BzBUWK  
}ie O  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 |a9d]^  
fA"N5qQI(  
; 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 BfZAK0+*$  
calc BUcPMF%\y:  
  begin to9~l"n.s  
    global allow all;                   ！声明全局变量 E4;vC ?K{  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 Y'-@O"pK  
    add_ring(r_co, N_Tm); 4WCWu}  
    def_ionsystem();              ！光谱数据函数 \fC)]QZ  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 ,:6gp3  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 #dyz  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 eS(hLXE!7  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 m?3!  
    finish_fiber();                                   S,Zl
S<Z#  
  end; 4lrF{S8  
L#U-dzy\  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 Gy}WZ9{  
show "Outputpowers:"                                   ！输出字符串Output powers： -u
)f@e  
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） )~W 35  
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） sBUK v(U)  
\dvzL(,  
dH]0(aJ  
; ------------- U\OfB'Dn  
diagram 1:                   !输出图表1 z+3GzDLy  
r~f*aD  
"Powers vs.Position"          ！图表名称 l Tpn/  
MnToL@  
x: 0, L_f                      ！命令x: 定义x坐标范围 2@7f^be  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 =NJ:%kvF  
y: 0, 15                      ！命令y: 定义y坐标范围 kyV!ATL1F  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 ?\Fo|__  
frame          ！frame改变坐标系的设置 n
^}M*#  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） 117`=9F  
hx             ！平行于x方向网格 ~x67v+I  
hy              ！平行于y方向网格 wXUP%i]i=  
WFHS8SI  
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 >~%!#,C(|U  
  color = red,  ！图形颜色 \iN3/J4  
  width = 3,   ！width线条宽度 ad <z+a  
  "pump"       ！相应的文本字符串标签 8ckcTNPu  
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 ,orq&#*Wd  
  color = blue,     {B;<R1  
  width = 3, [\i0@  
  "fw signal" @:2<cn`  
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}d1]@Y\  
  color = blue, .kbo]P  
  style = fdashed, R0yPmh,{  
  width = 3, *\gS 2[S  
  "bw signal" k[_)5@2  
`vbd7i  
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 sY|by\-c  
  yscale = 2,            ！第二个y轴的缩放比例 ajr);xd  
  color = magenta, #.Q3}[M  
  width = 3, u/s,#  
  style = fdashed, `5SLo=~  
  "n2 (%, right scale)" ,=Q;@Z4 vJ  
.( )rby  
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 mZ%"""X\Ei  
  yscale = 2, %R?B=W7;Q  
  color = red, x6n
(BMr  
  width = 3, !UzMuGj  
  style = fdashed, QaVxP1V#U  
  "n3 (%, right scale)" ]t2zwHo#  
]TE(:]o7V  
c@|!0 U%j  
; ------------- M53{e;.kN  
diagram 2:                    ！输出图表2 N~=,RPjq  

N<d0C  
"Variation ofthe Pump Power" 1\t#*N  
b-/8R|Mem  
x: 0, 10 X=1Po|  
"pump inputpower (W)", @x {zckY  
y: 0, 10 H$@5\pP>  
y2: 0, 100 7%MD0qm-  
frame 9~rrN60Q  
hx wI0NotC  
hy pqT+lai)#  
legpos 150, 150 yG v7^d  
fen~k#|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 6@rebe!&=  
  step = 5, DqH?:`G  
  color = blue, s^&Oh*SP*  
  width = 3, l* ap$1'  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 tz^2?wO  
  finish set_P_in(pump, P_pump_in) nO\c4#ce  
<<SUIY@X  
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 $~;h}I  
  yscale = 2, NMy+=GZu^  
  step = 5, xj!G9x<!  
  color = magenta, uY_vX\;67z  
  width = 3, M+|J;c
aX  
  "population of level 2 (%, rightscale)", Nn/f*GDvK  
  finish set_P_in(pump, P_pump_in) yIq. m=  
.#OD=wkN0  
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 m)1+D"z  
  yscale = 2, j@o \d%.'!  
  step = 5, :>q*#vlb  
  color = red, 8mc0(Z@  
  width = 3, W"meH~[Cp  
  "population of level 3 (%, rightscale)", 5R%4fzr&g  
  finish set_P_in(pump, P_pump_in) #Fwf]{J
 
H6oU Ne  
NZQl#ZJH:  
; ------------- L,/(^0;  
diagram 3:                         ！输出图表3 ,_
iR  
! N!A%  
"Variation ofthe Fiber Length" l~C=yP(~  
O;6am++M@  
x: 0.1, 5 3UNmUDl[~  
"fiber length(m)", @x /QW-#K|S&  
y: 0, 10 \i.Yhl:O  
"opticalpowers (W)", @y ?= RC?K  
frame nYb{?{_ca8  
hx q(XO_1W0V  
hy X+%5q =N  
JFOXr
RR=d  
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 bm\Zp  
  step = 20,             sQ aP:@  
  color = blue, pIhy3@bY  
  width = 3, S)\Yc=~h  
  "signal output" .QLjaEja  
j&|>Aa${  
;f: (set_L(x);P_out(pump)),                     ！改变光纤长度对泵浦信号输出功率的影响 Q~-MB]'  
   step = 20, color = red, width = 3,"residual pump"
^V?W'~  
^fqco9^;  
! set_L(L_f) {restore the original fiber length } 2'-!9!C  
5<77o|  
JBMJR  
; ------------- }{SpV  
diagram 4:                                  ！输出图表4 nsjrzO79L8  
Y7GHIzX  
"TransverseProfiles" 9k*1_  
6!A+$"  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) %4I13|<A`  
tg"NWp6  
x: 0, 1.4 * r_co /um
ZQN%!2  
"radialposition (µm)", @x P/Zp3O H  
y: 0, 1.2 * I_max *cm^2 py%_XL=w,  
"intensity (W/ cm&sup2;)", @y Z` zyEP A  
y2: 0, 1.3 * N_Tm %|o2d&i  
frame vD91t/_+  
hx iZ
;y(  
hy Hq!|(  
@w @SOzS)  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 f2,\B6+  
  yscale = 2, (!:+q$#BK  
  color = gray, I%'6IpR"d  
  width = 3, h7 c  
  maxconnect = 1, 'nP;IuMP  
  "N_dop (right scale)" #7BX,jvn>  
bo_Tp~j  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 Q$:>yveR*  
  color = red, M|9=B<6`7  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 vcz?;lg  
  width = 3, D"ecwx{%;C  
  "pump" ?>T (  
m-AW}1:\f  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 )o N#%%SB<  
  color = blue, @lu`oyM  
  maxconnect = 1, LG:Mksd8=4  
  width = 3, MzpDvnI9  
  "signal" ?:c:D5N  
3c[< #]8S  
Tq,xW  
; ------------- x2$Y"b?vz  
diagram 5:                                  ！输出图表5 m5kt O^EU  
5169E*  
"TransitionCross-sections" b6ui&Y8z  
~(Xzm  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) Wo,"$Z6B  
h%+6y  
x: 1450, 2050 353*D%8  
"wavelength(nm)", @x ^w+)A;?W  
y: 0, 0.6 R|JBzdK+P  
"cross-sections(1e-24 m&sup2;)", @y [e?vqm .  
frame +H6cZ,  
hx n"|1A..^  
hy i564<1`x  
rw%1>]os  
f: s12_Tm(x * nm) /1e-24,      ！Tm³⁺吸收截面与波长的关系 w)Wg 8  
  color = red, ^M7pCetjdW  
  width = 3, &!0%"4  
  "absorption" ~ "stI   
f: s21_Tm(x * nm) /1e-24,  ！Tm³⁺发射截面与波长的关系 p$!Q?&AV/  
  color = blue, 8%#pv
}  
  width = 3, V2/?1  
  "emission" x/,(G~  
!6pE0(V^+4  

感谢，视频上有点看不清楚