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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

(* ;`CNe$y   
Demo for program"RP Fiber Power": thulium-doped fiber laser, 6|{$]<'  
pumped at 790 nm. Across-relaxation process allows for efficient >o45vB4o  
population of theupper laser level. 6B pm+}  
*)            ！（*  *）注释语句 i7 *cpNPO  
7"|j.Yq$H{  
diagram shown: 1,2,3,4,5  ！指定输出图表 R\VM6>SN'S  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 dF (m!P/R  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响 ]Sl]G6#Iwv  
; 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 f*uD9l%/  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 c+_F}2)  
; 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 V( /=0H/ F  
$d[ -feU  
include"Units.inc"         ！读取“Units.inc”文件中内容 ~-dL #;  
#" 3az8u  
include"Tm-silicate.inc"    ！读取光谱数据 b0vbE8wa  
J3;dRW  
; Basic fiberparameters:    ！定义基本光纤参数 ? FlV<nE"J  
L_f := 4 { fiberlength }      ！光纤长度 aucQZD-_"  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 ?M02|8-  
r_co := 6 um { coreradius }                ！纤芯半径 h3z=tu['  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 E\ 'X|/$a  
BAQ;.N4  
; Parameters of thechannels:                ！定义光信道 BUp,bJpO  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm q%^vx%aL\  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 Y64B"J=P 9  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W \K,piCVViN  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um "q'9-lk  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 uI'g]18Hi  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 [u=DAk?8  
eqFOPK5q  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm *`(/wE2v]  
w_s := 7 um                          ！信号光的半径 0xNlO9b/  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 DJm/:td  
loss_s := 0                            ！信号光寄生损耗为0 Q<e`0cu|p  
OP-%t\sj>  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 1.5lJ:[G  
.x^`y2'U  
; 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 guD?~-Q  
calc 8/4Gr8 o  
  begin Xc^7  
    global allow all;                   ！声明全局变量 =XT'D@q~W  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 _`Abz2s  
    add_ring(r_co, N_Tm); $_.m<  
    def_ionsystem();              ！光谱数据函数 .QhH!#Y2D  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 l5jW`cl1  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 /@*J\0h(-  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 r7I,%}k  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 /&+6nOP  
    finish_fiber();                                   rLzYkZ  
  end; E9Q?@'h  
? }k~>. \  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 I)-u)P?2x  
show "Outputpowers:"                                   ！输出字符串Output powers： ^z[-pTY  
show"pump:     ", P_out(pump):d3:"W"  ！输出字符串pump：和计算值（格式为3个有效数字，单位W） UJ0Dy ` f  
show"signal:   ",P_out(signal_fw):d3:"W" ！输出字符串signal：和计算值（格式为3个有效数字，单位W） R.g'&_zx  
J{Z-4y  
0shNwV1zF  
; ------------- j=^b'dyL  
diagram 1:                   !输出图表1 9u'hCi(  
WAj26";M(  
"Powers vs.Position"          ！图表名称 @'EP$!c  
v!;E1  
x: 0, L_f                      ！命令x: 定义x坐标范围 TwZvz[u  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 [xXml On!  
y: 0, 15                      ！命令y: 定义y坐标范围 @UO=)PxN3  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 }G8RJxy  
frame          ！frame改变坐标系的设置 tk^1Ga3  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） ))n7.pB9/  
hx             ！平行于x方向网格 Lp \%-s#5s  
hy              ！平行于y方向网格 y\ nR0m  
]`D(/l'  
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 n7vLw7  
  color = red,  ！图形颜色 F_SkS?dB  
  width = 3,   ！width线条宽度 cLQvzd:h=  
  "pump"       ！相应的文本字符串标签 y*M,&,$  
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 ;+-$=l3[a  
  color = blue,     }*n(RnCn  
  width = 3, -=E/_c;  
  "fw signal" K/~+bq# +  
f: P(signal_bw, x),   ！P(signal_bw ,x) 函数是计算x位置处的后向信号光功率 (BC3[R@/l  
  color = blue, &DX9m4,y  
  style = fdashed, vf@d (g  
  width = 3, 9Byk/&$U  
  "bw signal" [Cz.K?+#M  
lLHHuQpuj  
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 DytOS}/^9  
  yscale = 2,            ！第二个y轴的缩放比例 7"f$;CN?~  
  color = magenta, m_H$fioha,  
  width = 3, ,q#^ _/?  
  style = fdashed, M* W=v  
  "n2 (%, right scale)" x8T5aS  
SaEe7eHd  
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 O.=~/!(  
  yscale = 2, Gvt.m&_  
  color = red, xPh%?j?*v  
  width = 3, xZ@H{):  
  style = fdashed, Y*``C):K%  
  "n3 (%, right scale)" "b*.>QuZ  
n@BE*I<"  
^(8 i` `V  
; ------------- |xH"Xvp:  
diagram 2:                    ！输出图表2 ?B %y)K  
t8s1d  
"Variation ofthe Pump Power" RlX;c!K  
5;V#Z@S  
x: 0, 10 IxCEE5+`%  
"pump inputpower (W)", @x v,RLN`CID  
y: 0, 10 Ms(;B*  
y2: 0, 100 iQ-;0<=G  
frame tGzYO/Zp  
hx >"F~%D<.  
hy }se)=7d8 Z  
legpos 150, 150 ~0fT*lp  
*6Rl[eXS  
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 'oTcx Jx  
  step = 5, ~`hI|i<]  
  color = blue, Y[T;j p(k  
  width = 3, 44?5]C7  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 #rV=!j||  
  finish set_P_in(pump, P_pump_in) xn@?CP`-y  
yQhrPw> m  
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 mo#4jtCE  
  yscale = 2, ~>D;2 S(a  
  step = 5, Sct-,K%i  
  color = magenta, _89 _*t(  
  width = 3, ]Vl5v5_  
  "population of level 2 (%, rightscale)", *^c4q|G.-  
  finish set_P_in(pump, P_pump_in) j1YE_U  
HcHfwLin0  
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 ]qXHalHY  
  yscale = 2, ]-%ZN+  
  step = 5, j Xi<ZJ  
  color = red, ;y6Jo  
  width = 3, gKb4n Nt  
  "population of level 3 (%, rightscale)", (L|SE4  
  finish set_P_in(pump, P_pump_in) Di*+Cz;gK  
y%TR2CvT  
<$Uj ~jN  
; -------------  e^&YQl  
diagram 3:                         ！输出图表3 RO wbzA)]r  
6{azzk8  
"Variation ofthe Fiber Length" UUb!2sO  
<mY`<(bc  
x: 0.1, 5 (G PJ=r  
"fiber length(m)", @x (^a;2j9  
y: 0, 10 &%qD Som3  
"opticalpowers (W)", @y .2xypL8(  
frame #yr19i ?  
hx tO[+O=d  
hy ?]9uHrdsN}  
2z0HB+Y}x  
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 ;S?1E:\av  
  step = 20,             kP;:s  
  color = blue, 'b661,+d  
  width = 3, K:y q^T7  
  "signal output" ]; ^OY\,  
=53LapTPJ  
;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 qZ\zsOnp  
   step = 20, color = red, width = 3,"residual pump" /=e[(5X|O  
F|P2\SPL  
! set_L(L_f) {restore the original fiber length } oSa FmP  
E=QL4*?   
p+8]H %  
; ------------- 6{7O  
diagram 4:                                  ！输出图表4 /WHhwMc!  
HENCQ_Wra  
"TransverseProfiles" C4 Wdt  
GV[%P  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) M0]l!x#7  
29qQ3M?  
x: 0, 1.4 * r_co /um qsk71L  
"radialposition (µm)", @x IB!Wrnj?  
y: 0, 1.2 * I_max *cm^2 <q[ *kr  
"intensity (W/ cm&sup2;)", @y t91CxZQ^s  
y2: 0, 1.3 * N_Tm `=KrV#/758  
frame oC7#6W:@w  
hx b%PVF&C9W  
hy wd#AA#J;*  
E?9_i :IX  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 ]oya<C6pR  
  yscale = 2, zf o.S[R@  
  color = gray, Y}?@Pm drz  
  width = 3, +z[!]^H]4  
  maxconnect = 1, GzB%vsv9 5  
  "N_dop (right scale)" 6op\g].P  
$`=?Nb@@#  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 -+PPz?0  
  color = red,  +;!w;t  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 wcL0#[)  
  width = 3, \!^o<$s.G  
  "pump" ]yIy~V  
H~~(v52wD  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 ?Jr<gn^D  
  color = blue, M^[ jA](a  
  maxconnect = 1, V3+%KkN  
  width = 3, ]_pL79y  
  "signal" 3)-#yOr  
*ap#*}r!Nk  
z::2O/ho  
; ------------- eS.]@ E-T  
diagram 5:                                  ！输出图表5 uf>w*[m5  
*FE<'+%  
"TransitionCross-sections" <n:?WP~U  
}GC{~ SZ4  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) tV,zz;* Oe  
U^YPL,m1  
x: 1450, 2050 gU%GM  
"wavelength(nm)", @x g Q9ff,  
y: 0, 0.6 8&;dR  
"cross-sections(1e-24 m&sup2;)", @y DVS7N_cx2o  
frame jCl[!L5/1  
hx w:N2 xI  
hy )~n}ieS  
( 0h]<7  
f: s12_Tm(x * nm) /1e-24,      ！Tm3+吸收截面与波长的关系 8`~]9ej  
  color = red, #Nd+X@j  
  width = 3, 8(I"C$D!k  
  "absorption" lt4UNJ3w  
f: s21_Tm(x * nm) /1e-24,  ！Tm3+发射截面与波长的关系 a&[nVu+  
  color = blue, lm\u(3_ $  
  width = 3, ,]Ma ,2  
  "emission" o MAK[$k;  
{h=Ai[|l4Q  
lileisgsz 2021-09-28 09:47
感谢，视频上有点看不清楚
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