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小火龙果 2020-05-28 16:28

RP Fiber Power仿真设计掺铥光纤激光器代码详解

(* #$U/*~m $  
Demo for program"RP Fiber Power": thulium-doped fiber laser, 73u97oe>1  
pumped at 790 nm. Across-relaxation process allows for efficient pfc"^Gi8  
population of theupper laser level. Ht}?=ZzW  
*)            !(*  *)注释语句 5(1c?biP&  
{Qd oI Pr3  
diagram shown: 1,2,3,4,5  !指定输出图表 dqB N_P%  
; 1: "Powersvs. Position"     !分号是注释;光纤长度对功率的影响 ;c|_z 9+  
; 2:"Variation of the Pump Power"  !泵浦光功率变化对信号输出功率的影响 k`'*niz  
; 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 VL"Cxs  
; 4:"Transverse Profiles"             !横向分布,横坐标为半径位置 <7Yh<(R e^  
; 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 XLYGhM  
/Trbr]lWy  
include"Units.inc"         !读取“Units.inc”文件中内容 t5 ^hZZ  
V4Qy^nn1  
include"Tm-silicate.inc"    !读取光谱数据 x<w-j[{k_K  
zFYzus`>  
; Basic fiberparameters:    !定义基本光纤参数 H;AMRL o4z  
L_f := 4 { fiberlength }      !光纤长度 mss.\  
No_z_steps := 50 {no steps along the fiber } !光纤步长,大括号{ }是注释,相当于备注 G"L`9E<0V  
r_co := 6 um { coreradius }                !纤芯半径 i;qij[W.z  
N_Tm := 100e24 { Tmdoping concentration }  !纤芯Tm离子掺杂浓度 1x##b [LC  
4kV$JV.l  
; Parameters of thechannels:                !定义光信道 C*RPSk  
l_p := 790 nm {pump wavelength }                !泵浦光波长790nm g%ys|  
dir_p := forward {pump direction (forward or backward) }   !前向泵浦 lc [)Ev  
P_pump_in := 5 {input pump power }                    !输入泵浦功率5W H<nA*Zf2@R  
w_p := 50 um {radius of pump cladding }               !包层泵浦相应的半径 50um 5TeGdfu @  
I_p(r) := (r <=w_p) { pump intensity profile }          !泵浦光强度分布 f4 +P2j  
loss_p := 0 {parasitic losses of pump wave }           !泵浦光寄生损耗为0 q JtLJ<=1  
`|92!Ej  
l_s := 1940 nm {signal wavelength }                   !信号光波长1940nm TZg1,Z  
w_s := 7 um                          !信号光的半径 (6 }7z+  
I_s(r) := exp(-2 *(r / w_s)^2)            !信号光的高斯强度分布 ;>5]KNj  
loss_s := 0                            !信号光寄生损耗为0 9@Cu5U]  
b>#dMRK  
R_oc := 0.70 {output coupler reflectivity (right side) }      !输出耦合反射率 9`H4"H>yG  
c;a<nTLn  
; Function for defining themodel:   !定义模型函数,一定要有calc命令,否则函数只会被定义,但不会被执行 Ix(,gDN  
calc EK Q>hww8  
  begin M,oZ_tY%  
    global allow all;                   !声明全局变量 E 8$S0u;`  
    set_fiber(L_f, No_z_steps, '');        !光纤参数 s`v$r,N0  
    add_ring(r_co, N_Tm); y G mFi  
    def_ionsystem();              !光谱数据函数 j]-_kjt  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  !泵浦光信道 Azr|cKu]  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      !前向信号光信道 rY@9nQ\>g  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    !后向信号光信道 Pv)^L  
    set_R(signal_fw, 1, R_oc);                                 !设置反射率函数 Bk5 ELf8pL  
    finish_fiber();                                   _2<UcC~  
  end; w|0:0Rc~u  
sS4V(:3s  
; Display someoutputs in the Output window (on the right side): !在Output aera区域显示输出 6u`$a&dR'l  
show "Outputpowers:"                                   !输出字符串Output powers: { +Wknm%  
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) J5<1 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) dd +lQJ c  
VH+3o?nrT  
CQ{{J{pU"  
; ------------- w~=xO_%  
diagram 1:                   !输出图表1 |S<!'rY  
3'0Jn6(  
"Powers vs.Position"          !图表名称 Fs=)*6}&  
\W=Z`w3  
x: 0, L_f                      !命令x: 定义x坐标范围 ;v.J D7  
"position infiber (m)", @x      !x轴标签;@x 指示这些字符串沿坐标轴放置 JnqP`kYbTE  
y: 0, 15                      !命令y: 定义y坐标范围 :>H{?  
y2: 0, 100                    !命令y2: 定义第二个y坐标范围 v:w^$]4  
frame          !frame改变坐标系的设置 ^LXsU] R  
legpos 600, 500  !图行在图表窗口中的位置(相对于左上角而言) TnKOr~@*  
hx             !平行于x方向网格 cBOt=vg,5  
hy              !平行于y方向网格 ~*^o[~x]\  
>@-. rkd(  
f: P(pump, x),    !命令f: 定义函数图;P(pump, x)函数是计算x位置处的泵浦光功率  =Uo*-EH  
  color = red,  !图形颜色 XJwgh y?(  
  width = 3,   !width线条宽度 d6??OO=~>M  
  "pump"       !相应的文本字符串标签 tqpi{e  
f: P(signal_fw, x),  !P(signal_fw ,x) 函数是计算x位置处的前向信号光功率 *mYGs )|  
  color = blue,     Ul 85-p  
  width = 3, iO18FfM_  
  "fw signal" /t2H%#v{  
f: P(signal_bw, x),   !P(signal_bw ,x) 函数是计算x位置处的后向信号光功率 497l2}0  
  color = blue, ,[dvs&-*  
  style = fdashed, B T {cTj0W  
  width = 3, 0=40}n&`  
  "bw signal" )"2eN3H/  
mjk<FXW  
f: 100 * n(x, 2),    !n(x ,2) 函数是计算x位置处激活粒子数在能级2上的占比 ];=|))ky"  
  yscale = 2,            !第二个y轴的缩放比例 8|L5nQ  
  color = magenta, i3$G)W  
  width = 3, Pj BBXI1i  
  style = fdashed, )Q}Q -Zt  
  "n2 (%, right scale)" +;oR_]l  
Ri::Ek3qu  
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 z?UEn#E2  
  yscale = 2, 1L?W+zMO  
  color = red, ;/IX w>O(/  
  width = 3, m?8o\|i,  
  style = fdashed, X_Pbbx_j  
  "n3 (%, right scale)" IEkbVIA(  
G$CSZrP.  
YzEOfHL,  
; ------------- j|p=JrCJ  
diagram 2:                    !输出图表2 =n@\m <  
2$o\`^dy  
"Variation ofthe Pump Power" f3.oc9G  
CalW J  
x: 0, 10 K05T`+N,  
"pump inputpower (W)", @x L i 9$N"2  
y: 0, 10 iHQ$L# 7  
y2: 0, 100 ol {N^fi K  
frame ?UeV5<TewS  
hx )?LZg<<   
hy W58%Zz4a  
legpos 150, 150 ?T|0"|\"'  
66_=bd(9  
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 @2_ E9{T  
  step = 5, 23Q 88z   
  color = blue, vuJEPn%  
  width = 3, z|(<Co8#.  
  "signal output power (W, leftscale)",     !相应的文本字符串标签 8"V1h72vcW  
  finish set_P_in(pump, P_pump_in) 7lwFxP5QT  
0[7"Lhpd  
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 N6%L4v8-}X  
  yscale = 2, ^L.'At  
  step = 5, A.$P1zwC  
  color = magenta, 0]nveC$  
  width = 3, ZcTjOy?  
  "population of level 2 (%, rightscale)", KAu>U3\/  
  finish set_P_in(pump, P_pump_in) |S:erYE,G  
iYlkc  
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 WWOjck #  
  yscale = 2, =&FaMR2  
  step = 5, W!+=`[Ff  
  color = red, =OTu8_ d0t  
  width = 3, FNo.#Z5+b  
  "population of level 3 (%, rightscale)", 6 Pdao{P  
  finish set_P_in(pump, P_pump_in) :$P1ps3B  
gp'k(rGH  
Np$ue }yr  
; ------------- :C={Z}t/F  
diagram 3:                         !输出图表3 t2m7Yh5B  
-q? ,  
"Variation ofthe Fiber Length" HTm`_}G9  
|U$ "GI  
x: 0.1, 5 3h A5"G+7  
"fiber length(m)", @x )YwLj&e4tf  
y: 0, 10 ho^jmp  
"opticalpowers (W)", @y 'tX}6wurf  
frame KYz@H#M  
hx j;-2)ZLm  
hy xNLgcb@v>  
p+7#`iICE  
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 |nqN95'u+]  
  step = 20,             ,;<M+V3+  
  color = blue, vM:c70=  
  width = 3, qT#NS&T!-  
  "signal output" 7>AM zNj  
i#*lK7  
;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 pP#|: %  
   step = 20, color = red, width = 3,"residual pump" kD)]\   
?t/\ ID  
! set_L(L_f) {restore the original fiber length } |M18/{  
+NeoGnj  
#GUD^#Jh  
; ------------- s'Qmr s a  
diagram 4:                                  !输出图表4 Qx_N,1>S  
E #!.;AQ  
"TransverseProfiles" vw-y:,5`t8  
z&jASL  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) ob|^lAU  
k(@W z>aCv  
x: 0, 1.4 * r_co /um b8Hz l!zO  
"radialposition (µm)", @x kN 0N18E  
y: 0, 1.2 * I_max *cm^2 9eR";Wm])  
"intensity (W/ cm&sup2;)", @y >Qg-dJt[  
y2: 0, 1.3 * N_Tm -av=5hm  
frame *V[I&dKq  
hx O.-A)S@  
hy ,)VAKrSg  
lB!M;2^)X  
f: N_dop(1, x * um,0),      !掺杂浓度的径向分布 @iBmOt>3  
  yscale = 2, %:OX^ ^i;  
  color = gray, 0}'/3Q  
  width = 3, t5P8?q\  
  maxconnect = 1, b7gN|Hw5 H  
  "N_dop (right scale)" DUg[L  
Kb'4W-&u!  
f: I(pump, -1, x *um, 0) * cm^2,    !泵浦光沿光纤径向的强度分布 S9'Xsh  
  color = red, Mf7 [@#$  
  maxconnect = 1,           !限制图形区域高度,修正为100%的高度 *uKYrs [  
  width = 3, @twi<U_  
  "pump" u('`.dwkc  
31QDN0o!~  
f: I(signal_fw, -1,x * um, 0) * cm^2,  !信号光沿光纤径向的强度分布 bik lja  
  color = blue, [*5hx_4%B  
  maxconnect = 1, QB ;TQZ  
  width = 3, [<d_#(]h'  
  "signal" .LbAR u  
aEun *V^,  
YtXd>@7  
; ------------- 8I<j"6`+Q  
diagram 5:                                  !输出图表5 #nmh=G?\Sm  
}j!C+i  
"TransitionCross-sections" Tl+PRR6D*  
lAGntYv  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) NSq29#  
Vo|[Z)MO`  
x: 1450, 2050 7$8DMBqq  
"wavelength(nm)", @x <UTO\w%  
y: 0, 0.6 ~4xn^.w  
"cross-sections(1e-24 m&sup2;)", @y CBz=-Xr  
frame 6]4=8! J  
hx Jid_&\  
hy 6}Rb-\N  
yQ&C]{>TS  
f: s12_Tm(x * nm) /1e-24,      !Tm3+吸收截面与波长的关系 CioS}K  
  color = red, Zlygx  
  width = 3, 0_=^#r4Mu  
  "absorption" [jGE {<Je  
f: s21_Tm(x * nm) /1e-24,  !Tm3+发射截面与波长的关系 z f >(Y7M  
  color = blue, VJ1rU mO~  
  width = 3, xlh<}V tp  
  "emission" Xo6zeLHO  
nB/`~_9  
lileisgsz 2021-09-28 09:47
感谢,视频上有点看不清楚
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