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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

(* Z]~) ->=}  
Demo for program"RP Fiber Power": thulium-doped fiber laser, ?hC,49  
pumped at 790 nm. Across-relaxation process allows for efficient -- >q=hlA  
population of theupper laser level. 9Sey&x  
*)            !(*  *)注释语句 |Eyn0\OA  
 cFD3  
diagram shown: 1,2,3,4,5  !指定输出图表 l('@~-Zy  
; 1: "Powersvs. Position"     !分号是注释;光纤长度对功率的影响 EvP\;7B  
; 2:"Variation of the Pump Power"  !泵浦光功率变化对信号输出功率的影响 \rpXG9  
; 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 SSQB1c  
; 4:"Transverse Profiles"             !横向分布,横坐标为半径位置 0 s$;3qE  
; 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 `=Z3X(Kc  
wU}%]FqtZ=  
include"Units.inc"         !读取“Units.inc”文件中内容 5+DId7d'n  
<jAn~=Uq[,  
include"Tm-silicate.inc"    !读取光谱数据 saa3BuV 6  
% lK/2-  
; Basic fiberparameters:    !定义基本光纤参数 Q "vhl2RX  
L_f := 4 { fiberlength }      !光纤长度 ~T^,5Tz1j  
No_z_steps := 50 {no steps along the fiber } !光纤步长,大括号{ }是注释,相当于备注 iSP}kM}  
r_co := 6 um { coreradius }                !纤芯半径 <B&vfKO^h  
N_Tm := 100e24 { Tmdoping concentration }  !纤芯Tm离子掺杂浓度 ,f@\Fs~n  
]N;\AXZ7  
; Parameters of thechannels:                !定义光信道 (Q?@LzCjy  
l_p := 790 nm {pump wavelength }                !泵浦光波长790nm dW5@Z-9  
dir_p := forward {pump direction (forward or backward) }   !前向泵浦 j 06 mky  
P_pump_in := 5 {input pump power }                    !输入泵浦功率5W Y*QoD9<T?;  
w_p := 50 um {radius of pump cladding }               !包层泵浦相应的半径 50um J#?` l,  
I_p(r) := (r <=w_p) { pump intensity profile }          !泵浦光强度分布 9;7|MPbR  
loss_p := 0 {parasitic losses of pump wave }           !泵浦光寄生损耗为0 Zmc"  
Di"Tv<RlQ  
l_s := 1940 nm {signal wavelength }                   !信号光波长1940nm ]3Y J a  
w_s := 7 um                          !信号光的半径 .<zN/&MXf  
I_s(r) := exp(-2 *(r / w_s)^2)            !信号光的高斯强度分布 &_$0lI DQ  
loss_s := 0                            !信号光寄生损耗为0 eH ]9"^> o  
Nu;?})tF  
R_oc := 0.70 {output coupler reflectivity (right side) }      !输出耦合反射率 ) ^`V{iD  
Sby(?yg  
; Function for defining themodel:   !定义模型函数,一定要有calc命令,否则函数只会被定义,但不会被执行 0N87G}Xu  
calc _)S['[  
  begin w9w=2 *  
    global allow all;                   !声明全局变量 X#>:9  
    set_fiber(L_f, No_z_steps, '');        !光纤参数 Y SB~04  
    add_ring(r_co, N_Tm); 5AK@e|G$w  
    def_ionsystem();              !光谱数据函数 ^o87qr0g]  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  !泵浦光信道 d{Cg3v`Rd  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      !前向信号光信道 7J ;\&q'  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    !后向信号光信道 RT. %\)))  
    set_R(signal_fw, 1, R_oc);                                 !设置反射率函数 \iRmGvT  
    finish_fiber();                                   7 <ZGNxZ~  
  end; D (WdI  
2~l+2..  
; Display someoutputs in the Output window (on the right side): !在Output aera区域显示输出 tIT/HG_o  
show "Outputpowers:"                                   !输出字符串Output powers: Urz9S3#\  
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) fcTg/EXn  
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) GOsOFs"I  
;efF]")  
VGf&'nL@,  
; ------------- }` YtXD-o  
diagram 1:                   !输出图表1 mX%T"_^  
T/PmT:Qg `  
"Powers vs.Position"          !图表名称 zZW5M^z8  
\fsNI T/  
x: 0, L_f                      !命令x: 定义x坐标范围 <@$+uZt+  
"position infiber (m)", @x      !x轴标签;@x 指示这些字符串沿坐标轴放置 vaLP_V  
y: 0, 15                      !命令y: 定义y坐标范围 A%cJ5dF8~  
y2: 0, 100                    !命令y2: 定义第二个y坐标范围 >0UY,2d  
frame          !frame改变坐标系的设置 l{gR6U{e  
legpos 600, 500  !图行在图表窗口中的位置(相对于左上角而言) I7\T :Q[  
hx             !平行于x方向网格 :PK2! 0nK  
hy              !平行于y方向网格 q|}O-A*wa  
Y!`  pF  
f: P(pump, x),    !命令f: 定义函数图;P(pump, x)函数是计算x位置处的泵浦光功率 `-.6;T}2U  
  color = red,  !图形颜色 3+\Zom4  
  width = 3,   !width线条宽度 UIkO_/}  
  "pump"       !相应的文本字符串标签 *'*,mfk[  
f: P(signal_fw, x),  !P(signal_fw ,x) 函数是计算x位置处的前向信号光功率 8!b>[Nsc  
  color = blue,     / */"gz%  
  width = 3, -Q/wW4dE=  
  "fw signal" ma xpR>7`j  
f: P(signal_bw, x),   !P(signal_bw ,x) 函数是计算x位置处的后向信号光功率 v 8EI   
  color = blue, /#z"c]#  
  style = fdashed, C[';B)a  
  width = 3, 9{}"tk5$h  
  "bw signal" K_n GZ/`[  
KF1Zy;  
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 iaJLIrl  
  yscale = 2,            !第二个y轴的缩放比例 LM(r3sonb  
  color = magenta, 4:Oq(e_(  
  width = 3, ,|Gjr T{vf  
  style = fdashed, +^jm_+  
  "n2 (%, right scale)" ^ p7z3ng  
oVr:ZwkG3  
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 >X*G6p  
  yscale = 2, |S~$IFN4  
  color = red, 3ZN\F  
  width = 3, x:Q$1&3N  
  style = fdashed, 6b%IPbb  
  "n3 (%, right scale)" }]M'f:%b  
)w5!'W4Z8  
Nobu= Z  
; ------------- *8+HQ[[#  
diagram 2:                    !输出图表2 q{%~(A5*H  
E,dUO;  
"Variation ofthe Pump Power" t>OEzUd9  
0176  
x: 0, 10 Mnk-"d  
"pump inputpower (W)", @x b@Dt]6_ UL  
y: 0, 10 >K&chg@Hv  
y2: 0, 100 fq4uiFi<  
frame *VH Wvj  
hx ^QjkZ^<dD  
hy ;at1|E*  
legpos 150, 150 9KB}?~Nx4  
Z4:^#98c.  
f: (set_P_in(pump, x);P_out(signal_fw)), !set_P_in(pump,x)改变泵浦信道功率;P_out(signal_fw)输出前向信号光 R+t]]n6#  
  step = 5, [c -|`d^  
  color = blue, &*E! %57  
  width = 3, +J~%z*A  
  "signal output power (W, leftscale)",     !相应的文本字符串标签 M IyT9",Pl  
  finish set_P_in(pump, P_pump_in) EiaP1o  
"Bwmq9Jq  
f: (set_P_in(pump,x); 100 * n_av(2)),   !改变泵浦信号功率对能级2上激活粒子占比的影响 LitdO>%#2  
  yscale = 2, H|7XfM  
  step = 5, 6tjV^sjs  
  color = magenta, WgG$ r  
  width = 3, {LVA_7@  
  "population of level 2 (%, rightscale)", @h_ bXo  
  finish set_P_in(pump, P_pump_in) @nMVs6  
wW8[t8%43  
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 s|:1z"q  
  yscale = 2, x%O6/rl  
  step = 5, c10$5V&@  
  color = red, /2hRL yeAZ  
  width = 3, ZR-64G=L,  
  "population of level 3 (%, rightscale)", Xh}D_c  
  finish set_P_in(pump, P_pump_in) #0Uz1[  
-"{g kjuv  
)FmIL(vu  
; ------------- 'x<oILOG  
diagram 3:                         !输出图表3 -j2y#aP  
k4!_(X%8  
"Variation ofthe Fiber Length" e ky1}  
l!KPgRw  
x: 0.1, 5 [k(b<'  
"fiber length(m)", @x qJf\,7mi  
y: 0, 10 Vp0_R9oQ  
"opticalpowers (W)", @y fL d2{jI,  
frame !*HJBZ]q  
hx r b\t0tg  
hy ~t/i0pKq.  
1c429&-  
f: (set_L(x);P_out(signal_fw)),     !改变光纤长度对信号光输出功率的影响 KZ%us6  
  step = 20,             U 8p %MFD  
  color = blue, IbJl/N%o  
  width = 3, '-J<ib t  
  "signal output" _d!o,=}  
C@Go]*c  
;f: (set_L(x);P_out(pump)),                     !改变光纤长度对泵浦信号输出功率的影响 nHH FHnFf  
   step = 20, color = red, width = 3,"residual pump" h^qZi@L  
:vx<m_  
! set_L(L_f) {restore the original fiber length } [~RO9=;L  
&l!T2PX!  
_Gaem"k|  
; ------------- ?Yf v^DQ5  
diagram 4:                                  !输出图表4 Ewq@>$_!  
cDzb}W*UM  
"TransverseProfiles" '1xhP}'3)  
'RF`XX  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) -:"KFc8A  
q8-hbWNm4  
x: 0, 1.4 * r_co /um -Ah&|!/  
"radialposition (µm)", @x dKC*QHU  
y: 0, 1.2 * I_max *cm^2 p >ua{}!L  
"intensity (W/ cm&sup2;)", @y vD:J!|hs(  
y2: 0, 1.3 * N_Tm 4[JF.O6}  
frame %.]#3tW  
hx tPN CdA  
hy j;V\~[I^u  
,b IJW]h0  
f: N_dop(1, x * um,0),      !掺杂浓度的径向分布 <|?)^;R5!  
  yscale = 2, aaw[ia_EL  
  color = gray, bu<d>XR  
  width = 3, sQ^t8Y 9  
  maxconnect = 1, E{ e  
  "N_dop (right scale)" g6P^JW}.  
>;Vfs{Z(q  
f: I(pump, -1, x *um, 0) * cm^2,    !泵浦光沿光纤径向的强度分布 +kEM%z  
  color = red, :).NA ]  
  maxconnect = 1,           !限制图形区域高度,修正为100%的高度 <6Y;VH^_  
  width = 3, #Ha"rr46p  
  "pump" ={ -kQq  
@9n|5.i  
f: I(signal_fw, -1,x * um, 0) * cm^2,  !信号光沿光纤径向的强度分布 T0"nzukd  
  color = blue, E8"&gblg  
  maxconnect = 1, j[FB*L1!D  
  width = 3, 2#3`[+g<n  
  "signal" c}|.U  
]B3+& g  
1%R${Qhr  
; ------------- M*D_p n&  
diagram 5:                                  !输出图表5 |2n*Ds'  
(VI(Nv:o@  
"TransitionCross-sections" ZI qXkD  
w+)wrJTtm  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) UBM#~~sM  
3D!7,@&>3  
x: 1450, 2050 3)LS#=  
"wavelength(nm)", @x 4F0w+w JD  
y: 0, 0.6 (Cq 38~mR  
"cross-sections(1e-24 m&sup2;)", @y D|m0Vj b  
frame V9}\0joM  
hx `Npo|.?=  
hy ;-Os~81o?  
+v5f-CBu  
f: s12_Tm(x * nm) /1e-24,      !Tm3+吸收截面与波长的关系 =54D#,[B  
  color = red, ZsXw]Wa  
  width = 3, s_RK x)w@  
  "absorption" "DGap*=J  
f: s21_Tm(x * nm) /1e-24,  !Tm3+发射截面与波长的关系 E'D16Rhp  
  color = blue, Rx"+i0  
  width = 3, DbB<8$  
  "emission" ~"vS$>+  
z;e@m2.IM  
lileisgsz 2021-09-28 09:47
感谢,视频上有点看不清楚
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