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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

(* W!g ,  
Demo for program"RP Fiber Power": thulium-doped fiber laser, ^VQiq7 xm  
pumped at 790 nm. Across-relaxation process allows for efficient 8cHZBM7'  
population of theupper laser level. "F^EfpcJ{9  
*)            !(*  *)注释语句 IKt9=Tx  
pw,.*N3P  
diagram shown: 1,2,3,4,5  !指定输出图表 Aq-v3$XL  
; 1: "Powersvs. Position"     !分号是注释;光纤长度对功率的影响 shD$,! k  
; 2:"Variation of the Pump Power"  !泵浦光功率变化对信号输出功率的影响 b$BUo8O}  
; 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 cWi2Sls  
; 4:"Transverse Profiles"             !横向分布,横坐标为半径位置 ;-3M  
; 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 aaBBI S  
WJ%b9{<  
include"Units.inc"         !读取“Units.inc”文件中内容 N4Ym[l  
-Bc.<pFqp  
include"Tm-silicate.inc"    !读取光谱数据 [4gv_g  
*m;L.r`5[  
; Basic fiberparameters:    !定义基本光纤参数 =J:~AD#  
L_f := 4 { fiberlength }      !光纤长度 4 P.ry|2  
No_z_steps := 50 {no steps along the fiber } !光纤步长,大括号{ }是注释,相当于备注 $]_=B Jyu  
r_co := 6 um { coreradius }                !纤芯半径 m+L:\mvA  
N_Tm := 100e24 { Tmdoping concentration }  !纤芯Tm离子掺杂浓度 )}EwEM  
,Vogo5~X  
; Parameters of thechannels:                !定义光信道 "/q6E  
l_p := 790 nm {pump wavelength }                !泵浦光波长790nm %Z.!Bm:  
dir_p := forward {pump direction (forward or backward) }   !前向泵浦 >+1bTt/-F  
P_pump_in := 5 {input pump power }                    !输入泵浦功率5W vO\CPb %/  
w_p := 50 um {radius of pump cladding }               !包层泵浦相应的半径 50um @8 pRIS"V  
I_p(r) := (r <=w_p) { pump intensity profile }          !泵浦光强度分布 SXhJz=h  
loss_p := 0 {parasitic losses of pump wave }           !泵浦光寄生损耗为0 vt1!|2{ h  
i}Y:o}  
l_s := 1940 nm {signal wavelength }                   !信号光波长1940nm $HaM, Oh;i  
w_s := 7 um                          !信号光的半径 ]$7|1-&Y  
I_s(r) := exp(-2 *(r / w_s)^2)            !信号光的高斯强度分布 -+z^{*\; N  
loss_s := 0                            !信号光寄生损耗为0 (* p |Kzu  
n9#@ e}r  
R_oc := 0.70 {output coupler reflectivity (right side) }      !输出耦合反射率 Q<M>+U;t  
)t|M)zJ  
; Function for defining themodel:   !定义模型函数,一定要有calc命令,否则函数只会被定义,但不会被执行 =lzjMRX(?  
calc %rf<YZ.\  
  begin ~ >6(@~6  
    global allow all;                   !声明全局变量 !$O +M#  
    set_fiber(L_f, No_z_steps, '');        !光纤参数 8r~4iVwg  
    add_ring(r_co, N_Tm); 1(-)$m8}  
    def_ionsystem();              !光谱数据函数 J~~WV<6  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  !泵浦光信道 rT x]%{  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      !前向信号光信道 oRCj]9I$  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    !后向信号光信道 I!{5*~ 3  
    set_R(signal_fw, 1, R_oc);                                 !设置反射率函数 +Ix;~  
    finish_fiber();                                   s01n[jQ  
  end; (*#S%4(YX  
J"|o g|Tz  
; Display someoutputs in the Output window (on the right side): !在Output aera区域显示输出 &n['#7 <(!  
show "Outputpowers:"                                   !输出字符串Output powers: lLnD%*03  
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) IF<jq\M  
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) H=*;3gM,'  
O5E\#*<K  
,}J(&  
; ------------- \h:$q E7  
diagram 1:                   !输出图表1 o_{-X 1w  
JVN0];IL}  
"Powers vs.Position"          !图表名称 qg|SBQ?6  
BeBa4s  
x: 0, L_f                      !命令x: 定义x坐标范围 O}2;>eH  
"position infiber (m)", @x      !x轴标签;@x 指示这些字符串沿坐标轴放置 Mu TlN  
y: 0, 15                      !命令y: 定义y坐标范围 )!3sB{ H  
y2: 0, 100                    !命令y2: 定义第二个y坐标范围 'v?Z~"w=  
frame          !frame改变坐标系的设置 3d[fP#NY7  
legpos 600, 500  !图行在图表窗口中的位置(相对于左上角而言) +dlN^P647  
hx             !平行于x方向网格 <&B)i\j8=b  
hy              !平行于y方向网格 &S/KR$^ %  
h^cM#L^B  
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 {ymD.vf=9+  
  color = red,  !图形颜色 J#MUtpPdQ  
  width = 3,   !width线条宽度 $vx]\` ^  
  "pump"       !相应的文本字符串标签 af.yC[  
f: P(signal_fw, x),  !P(signal_fw ,x) 函数是计算x位置处的前向信号光功率 86oa>#opU  
  color = blue,     ZPRkk?M}.  
  width = 3, %R."  
  "fw signal" Z!DGCw  
f: P(signal_bw, x),   !P(signal_bw ,x) 函数是计算x位置处的后向信号光功率 EP,lT.u3  
  color = blue, Db@$'  
  style = fdashed, |BN^5m qP6  
  width = 3, .O@T#0&=_  
  "bw signal" 4 1q|R[js!  
]U82A**n  
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 4'[/gMUkw  
  yscale = 2,            !第二个y轴的缩放比例 l%L..WCT]  
  color = magenta, :A"GO c,  
  width = 3, 'Y `or14E  
  style = fdashed, /d*d'3{c  
  "n2 (%, right scale)" ,Tjc\;~%  
OF-$*  
f: 100 * n(x, 3),          !n(x ,3) 函数是计算x位置处激活粒子数在能级3上的占比 "=@X>jUc  
  yscale = 2, ^-Bx zOp  
  color = red, q-}q rg  
  width = 3, {W,&jC  
  style = fdashed, r1ao=N  
  "n3 (%, right scale)" ?cF`T/z]"  
bL-+  
Dn~c  
; ------------- J#ujIe  
diagram 2:                    !输出图表2 U4M}E h8  
HHzAmHt  
"Variation ofthe Pump Power" vq/3a  
b1\.hi  
x: 0, 10 SJ8Ax_9{q  
"pump inputpower (W)", @x ,v,#f .  
y: 0, 10 05hjC  
y2: 0, 100 X;'H@GU0  
frame (ZSd7qH"  
hx ip8%9fG\>  
hy wwaw|$  
legpos 150, 150 &L`^\B]k|  
:8=7)cW  
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 P.aN4 9`=  
  step = 5, #83`T&Xw*  
  color = blue, }JI@f14  
  width = 3, H< 51dJn~  
  "signal output power (W, leftscale)",     !相应的文本字符串标签 %[B^b)2  
  finish set_P_in(pump, P_pump_in) 5v5)vv.kd  
Sq:,6bcG  
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 5Q7Z$A1a 9  
  yscale = 2, [3D*DyQt  
  step = 5, M47t(9krV  
  color = magenta, 4]G J+a  
  width = 3, l$Y*ii  
  "population of level 2 (%, rightscale)", w#}[=jy  
  finish set_P_in(pump, P_pump_in) duQ ,6  
u43W.4H13  
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 !{q_Q !  
  yscale = 2, m)Ta5w^  
  step = 5, =aBc .PJ^  
  color = red, qBF6LhR  
  width = 3, &$yxAqdab  
  "population of level 3 (%, rightscale)", Q%r KKOX8  
  finish set_P_in(pump, P_pump_in) Lo,uH`qU  
3FY87R   
45Hbg  
; ------------- tJ$gH;  
diagram 3:                         !输出图表3 %\^VxM  
q?y-s  
"Variation ofthe Fiber Length" ;"B@QPX  
F/ o }5H  
x: 0.1, 5 r(j:C%?}C  
"fiber length(m)", @x AcP d(Pc  
y: 0, 10 \&/V p`  
"opticalpowers (W)", @y <c%  
frame @)XR  
hx  SwE bVwB  
hy C <Pd_&  
(}m2}  
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 XFSHl[uS1  
  step = 20,             =O%'qUj`q  
  color = blue, IFsh"i  
  width = 3, a(IUAh*mO  
  "signal output" @d|3c7` A  
Gv&%cq1  
;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 dWTc3@xd  
   step = 20, color = red, width = 3,"residual pump" J4%"38l  
`ztp u ~?  
! set_L(L_f) {restore the original fiber length } `{%ImXQF  
@4G{L8Q}  
} `Cc-X7  
; ------------- 5[LDG/{Tys  
diagram 4:                                  !输出图表4 a$K6b5`>Rs  
MzMVs3w|  
"TransverseProfiles" +,]_TxL|C  
"m > BE  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) MFn\[J`Ra  
ioBYxbY`  
x: 0, 1.4 * r_co /um {ub'   
"radialposition (µm)", @x .On3ZN  
y: 0, 1.2 * I_max *cm^2 !Qq~lAJO;  
"intensity (W/ cm&sup2;)", @y ;#L]7ZY9:-  
y2: 0, 1.3 * N_Tm Vkf c&+  
frame &o]fBdn  
hx O{p7I&  
hy 3N ?"s1U  
}Te+Rv7{E  
f: N_dop(1, x * um,0),      !掺杂浓度的径向分布 .P#t"oW}  
  yscale = 2, ]?T,J+S  
  color = gray, rgo!t028^  
  width = 3, wbB\~*Z)  
  maxconnect = 1, +~EnrrT+W  
  "N_dop (right scale)" c*r@QmB:  
r6&+pSA>  
f: I(pump, -1, x *um, 0) * cm^2,    !泵浦光沿光纤径向的强度分布 %%9T-+T  
  color = red, H2'djZ  
  maxconnect = 1,           !限制图形区域高度,修正为100%的高度 Y()ZM  
  width = 3, =zR9^k  
  "pump" @~&|BvK% \  
liBFx6\"S  
f: I(signal_fw, -1,x * um, 0) * cm^2,  !信号光沿光纤径向的强度分布 GL _hRu  
  color = blue, wlQ @3RN>  
  maxconnect = 1, 85q!FpuH  
  width = 3, Y.q$"lm7k  
  "signal" !$/P8T``M  
xt6%[)  
v%kl*K`*  
; ------------- e5D\m g)  
diagram 5:                                  !输出图表5 O;$}j:;KF  
1)5/a5  
"TransitionCross-sections" H vHy{S4  
b'I@TLE')  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) J3XG?' }  
@YVla !5O@  
x: 1450, 2050 &UVqF o  
"wavelength(nm)", @x N/[!$B0H@  
y: 0, 0.6 zDBm^ s  
"cross-sections(1e-24 m&sup2;)", @y ps^["3e  
frame >%5GMx>m  
hx If8Lt}-  
hy .$1S-+(kV  
qC-4X"y+  
f: s12_Tm(x * nm) /1e-24,      !Tm3+吸收截面与波长的关系 ix38|G9U  
  color = red, Vh^ :.y   
  width = 3, t qUBl?i  
  "absorption" 2Sk hBb=d  
f: s21_Tm(x * nm) /1e-24,  !Tm3+发射截面与波长的关系 ~.#57g F"  
  color = blue, N'PK4:  
  width = 3, 7q:;3;"9  
  "emission" |WNI[49  
%0({ MU  
lileisgsz 2021-09-28 09:47
感谢,视频上有点看不清楚
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