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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

(* +pPfvE`  
Demo for program"RP Fiber Power": thulium-doped fiber laser, A^ofs*"Y  
pumped at 790 nm. Across-relaxation process allows for efficient )x+P9|  
population of theupper laser level. 'Zs3b4n8  
*)            ！（*  *）注释语句  .0YcB  
 WD55(  
diagram shown: 1,2,3,4,5  ！指定输出图表 =(+]ee!Ti  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 A(_HM qA]  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 {p.^E5&  
; 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 3n,jrX75u  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 qv^P  
; 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 9(3]t}J5 d  
xkCM*5:  
include"Units.inc"         ！读取“Units.inc”文件中内容 8WE@ X)e  
en>n\;U  
include"Tm-silicate.inc"    ！读取光谱数据 IClw3^\l  
a,36FF~&  
; Basic fiberparameters:    ！定义基本光纤参数 U&i#cF   
L_f := 4 { fiberlength }      ！光纤长度 oam$9 q  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 zLgc j(;  
r_co := 6 um { coreradius }                ！纤芯半径 $DXO7;#  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 0K'{w]Q  
5dGfO:Dy_  
; Parameters of thechannels:                ！定义光信道 NH;e|8  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm &gJ1*"$9  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 r+8)<Xt+p  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W egK~w8`W%  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um !Q WNHL  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 jzJQ/ZFS  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 Iprt ZqiL  
SwsJ<Dq^z  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm ~s-bA#0S  
w_s := 7 um                          ！信号光的半径 ht*N[Pi4;  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 ftvu69f  
loss_s := 0                            ！信号光寄生损耗为0 eL>wKu:r  
tm/=Oc1p  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 8 :WN@  
vf zC2  
; 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 4[i 3ckFT,  
calc ^KdT,^6T  
  begin v4Wq0>o  
    global allow all;                   ！声明全局变量 &\I<j\F2/  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 \61H(,  
    add_ring(r_co, N_Tm); <THw l/a  
    def_ionsystem();              ！光谱数据函数 +m]-)  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 o{>4PZ}=g  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 #1%ahPhR+  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 }W@refS  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 8nn g^  
    finish_fiber();                                   /lbj!\~  
  end; T ay226  
tmOy"mq67  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 Y(t /=3c[  
show "Outputpowers:"                                   ！输出字符串Output powers： "f8,9@  
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） KTt+}-vP^  
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） 3b\s;!  
]h~F%   
IqV" 4  
; ------------- k>F!S`a&m  
diagram 1:                   !输出图表1 CcW3o"=4  
YzQ(\._s  
"Powers vs.Position"          ！图表名称 9+MW13?  
%19~9Tw  
x: 0, L_f                      ！命令x: 定义x坐标范围 %f'=9pit  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 qtdkK LT  
y: 0, 15                      ！命令y: 定义y坐标范围 t{ yj`Vg  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 b1>]?.  
frame          ！frame改变坐标系的设置 o2B|r`R  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） oexTz[  
hx             ！平行于x方向网格 @54$IhhT~  
hy              ！平行于y方向网格 b+q'xnA=>  
8G3 Z,8P4(  
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 -<k)|]8  
  color = red,  ！图形颜色 xI<B)6D;f  
  width = 3,   ！width线条宽度 sxA]o|  
  "pump"       ！相应的文本字符串标签 cLp_\\  
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 utRO?]%d !  
  color = blue,     Zyr| J!VF  
  width = 3, cWyf04-?  
  "fw signal" `q\F C[W  
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 8\9W:D@"x  
  color = blue, 7FkiT  
  style = fdashed, VRgckh m  
  width = 3, Ip`1Wv_  
  "bw signal" 7XT(n v  
wl%ysM| x  
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 % >a /m.$  
  yscale = 2,            ！第二个y轴的缩放比例 Ym"^Ds}  
  color = magenta, jl}!UG  
  width = 3, *;McX  
  style = fdashed, *g %bdO  
  "n2 (%, right scale)" !~RK2d  
_VjaTw8iM  
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 @YRy)+  
  yscale = 2, gx^_bHh  
  color = red, cAGM|%  
  width = 3, 6HJsIeQ  
  style = fdashed, L4T\mP7D7*  
  "n3 (%, right scale)" Jw}&[  
nC !NZ  
Cq7 uy  
; ------------- 1c @S[y  
diagram 2:                    ！输出图表2 !5h-$;  
zt9A-% \R  
"Variation ofthe Pump Power" UroC8Tm  
}@jJv||  
x: 0, 10 Z_dL@\#|  
"pump inputpower (W)", @x 6:8Nz   
y: 0, 10 Vv5T(~   
y2: 0, 100 6< -Cpc  
frame Av yer/{  
hx XYD-5pG  
hy ~iiDy;"  
legpos 150, 150 ;5$ GJu(  
8[t*VIXI  
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 q9VBK(,X  
  step = 5, N}[!QE  
  color = blue, A.7lo  
  width = 3, ki2 `gLK  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 +\dKe[j{g  
  finish set_P_in(pump, P_pump_in) \+/ciPzA-  
 !a\HdQ  
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 sK9RViqF\  
  yscale = 2, i4WHjeo\  
  step = 5, _ MB/p  
  color = magenta, #u+qV!4  
  width = 3, 'qde#[VB  
  "population of level 2 (%, rightscale)", -vc$I=b;  
  finish set_P_in(pump, P_pump_in) 9C Ki$L  
m :~y:.  
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 5A 5t  
  yscale = 2, I1s= =  
  step = 5, #h9Gl@|  
  color = red, vF~q".imC  
  width = 3, &w`Ho)P  
  "population of level 3 (%, rightscale)", O8v9tGZoh  
  finish set_P_in(pump, P_pump_in) 7B5b +  
XhWo~zh"  
1=9GV+`n  
; ------------- S1~K.<B  
diagram 3:                         ！输出图表3 ypemp=+(r  
p/7'r  
"Variation ofthe Fiber Length" +eKLwM  
@;y@Hf'Jv  
x: 0.1, 5 XDyo=A]  
"fiber length(m)", @x UQYHR+  
y: 0, 10 aMkuyqPf{  
"opticalpowers (W)", @y  xI#rnx*  
frame ei=u$S.  
hx 3,*A VcQA  
hy  4m=0e  
aTvLQ@MQ  
f: (set_L(x);P_out(signal_fw)),     ！改变光纤长度对信号光输出功率的影响 ZWjje6  
  step = 20,             >o& %via}  
  color = blue, 7i02M~*uS  
  width = 3, L*4= b (3  
  "signal output" y@2"[fo3~  
BXxJra/V  
;f: (set_L(x);P_out(pump)),                     ！改变光纤长度对泵浦信号输出功率的影响 q&NXF (  
   step = 20, color = red, width = 3,"residual pump" dN:^RCFzS  
QGGBI Ku   
! set_L(L_f) {restore the original fiber length } =,qY\@fq  
-'WR9M?fq  
z-"P raP  
; ------------- #(a;w  
diagram 4:                                  ！输出图表4 s,/C^E  
=eDC{/K  
"TransverseProfiles" *r9D+}Y(4  
k{lXK\zN  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) n? =O@yq  
A5 4u}  
x: 0, 1.4 * r_co /um Y<N#{)Q  
"radialposition (µm)", @x 8-kR {9r  
y: 0, 1.2 * I_max *cm^2 !B9 Yw/Ba  
"intensity (W/ cm&sup2;)", @y )7P>Hj  
y2: 0, 1.3 * N_Tm < %<nh`D  
frame TC=>De2;  
hx E6 T=lwOZ  
hy ^Mhh2v  
]z=dRq  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 K9nW"0>  
  yscale = 2, HB.:/ 5\  
  color = gray, sE{5&aCSR  
  width = 3, ~rXLb:  
  maxconnect = 1, NQiu>Sg  
  "N_dop (right scale)" qkC{IBN92  
.]<gm9l  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 UxMei  
  color = red, sdd%u~4,X  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 qzZ;{>_f  
  width = 3, }#=t%uZ/  
  "pump" ku>Bxau4>  
W!=ur,F+  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 v=&xiwz}  
  color = blue, m|]"e@SF2  
  maxconnect = 1, c2s73i z  
  width = 3, ?a?4;Y!  
  "signal" o62GEl25  
q 4Ok$~"I  
5;XU6Rz!  
; ------------- ox";%|PP1  
diagram 5:                                  ！输出图表5 PBL=P+  
`J7@G]X;2  
"TransitionCross-sections" a |]}uFr  
/:,}hy+U  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) `Uvc^  
U` )d `4"  
x: 1450, 2050 DD>n-8M@>  
"wavelength(nm)", @x 4JH^R^O<n  
y: 0, 0.6 ,d^HAg^j  
"cross-sections(1e-24 m&sup2;)", @y VPVg \K{  
frame n%QWs 1 b  
hx 0juP"v$C>  
hy |gT8QP  
&=In  
f: s12_Tm(x * nm) /1e-24,      ！Tm3+吸收截面与波长的关系 D_`~$QB`,  
  color = red, 4O{,oN~7  
  width = 3, d@Wze[M?0  
  "absorption" usi3z9P>n  
f: s21_Tm(x * nm) /1e-24,  ！Tm3+发射截面与波长的关系 Tg=P*HY6  
  color = blue, $g,v]MW  
  width = 3, yi-0CHo  
  "emission"  W}Rzn  
ClPE_Cfw~  
lileisgsz 2021-09-28 09:47
感谢，视频上有点看不清楚
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