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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

(* >h$Q%w{V  
Demo for program"RP Fiber Power": thulium-doped fiber laser, ;O<-4$  
pumped at 790 nm. Across-relaxation process allows for efficient {WTy/$ Qk  
population of theupper laser level. Z~;rp`P  
*)            ！（*  *）注释语句 P<LmCY m  
qsYg%Z  
diagram shown: 1,2,3,4,5  ！指定输出图表 ^ h2!u'IQ  
; 1: "Powersvs. Position"     ！分号是注释；光纤长度对功率的影响 NE| Q0g  
; 2:"Variation of the Pump Power"  ！泵浦光功率变化对信号输出功率的影响  ;B{oGy.  
; 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 P!XO8X 1F  
; 4:"Transverse Profiles"             ！横向分布，横坐标为半径位置 vPrlRG6  
; 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 Ieh<|O,-C  
xO4""/ n  
include"Units.inc"         ！读取“Units.inc”文件中内容 ^W~8)Rbf  
s#Xfu\CP  
include"Tm-silicate.inc"    ！读取光谱数据 ?gMq:[X N  
$s"-r9@q  
; Basic fiberparameters:    ！定义基本光纤参数 m\MI 6/  
L_f := 4 { fiberlength }      ！光纤长度  +&<k}Mz  
No_z_steps := 50 {no steps along the fiber } ！光纤步长，大括号{ }是注释，相当于备注 FRsp?i K)  
r_co := 6 um { coreradius }                ！纤芯半径 r,:acK  
N_Tm := 100e24 { Tmdoping concentration }  ！纤芯Tm离子掺杂浓度 ^Iqu^n?2.  
(g1Op~EM  
; Parameters of thechannels:                ！定义光信道 4hkyq>c}  
l_p := 790 nm {pump wavelength }                ！泵浦光波长790nm .S]*A b  
dir_p := forward {pump direction (forward or backward) }   ！前向泵浦 6lUC$B Y  
P_pump_in := 5 {input pump power }                    ！输入泵浦功率5W `r0lu_.$]4  
w_p := 50 um {radius of pump cladding }               ！包层泵浦相应的半径 50um /bLL!nD=^  
I_p(r) := (r <=w_p) { pump intensity profile }          ！泵浦光强度分布 *aGJ$ P0  
loss_p := 0 {parasitic losses of pump wave }           ！泵浦光寄生损耗为0 h+j*vX/!  
`$vf9'\+  
l_s := 1940 nm {signal wavelength }                   ！信号光波长1940nm }%D${.R]  
w_s := 7 um                          ！信号光的半径 ~Q}!4LH  
I_s(r) := exp(-2 *(r / w_s)^2)            ！信号光的高斯强度分布 g@Rs.Zq  
loss_s := 0                            ！信号光寄生损耗为0 a;\a>N4  
O,#,`2Qc  
R_oc := 0.70 {output coupler reflectivity (right side) }      ！输出耦合反射率 #8y"1I=i&  
JkKbw&65  
; 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 E H|L1g  
calc ^ ~dC&!D  
  begin 5tEkQ(Ei8  
    global allow all;                   ！声明全局变量 46~nwi$,^  
    set_fiber(L_f, No_z_steps, '');        ！光纤参数 +x<OyjY5?]  
    add_ring(r_co, N_Tm); ~(:0&w%e  
    def_ionsystem();              ！光谱数据函数 s|X_:3\x  
    pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p);  ！泵浦光信道 PzustC|  
    signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward);      ！前向信号光信道 3\cx(  
    signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward);    ！后向信号光信道 MeAY\V%G=o  
    set_R(signal_fw, 1, R_oc);                                 ！设置反射率函数 }rF4M1+B\  
    finish_fiber();                                   f+\UVq?  
  end; -z%->OUu  
t3=K>Y@w  
; Display someoutputs in the Output window (on the right side): ！在Output aera区域显示输出 3_]QtP3  
show "Outputpowers:"                                   ！输出字符串Output powers： '}-QZ$|*  
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） at1 oxmy  
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） b~(S;1NS'  
IYa(B+nB)  
4JXJ0T ar  
; ------------- LLbI}:  
diagram 1:                   !输出图表1 Dn#UcMO>W  
-#R63f&  
"Powers vs.Position"          ！图表名称 md|I?vk  
P ,rLyx   
x: 0, L_f                      ！命令x: 定义x坐标范围 XXeDOrb  
"position infiber (m)", @x      ！x轴标签；@x 指示这些字符串沿坐标轴放置 r> .l^U9hJ  
y: 0, 15                      ！命令y: 定义y坐标范围 D%6}x^`Qk  
y2: 0, 100                    ！命令y2: 定义第二个y坐标范围 F*-'8~T  
frame          ！frame改变坐标系的设置 E )2/Vn2  
legpos 600, 500  ！图行在图表窗口中的位置（相对于左上角而言） {\|XuCF#  
hx             ！平行于x方向网格 '2rSX[$ tf  
hy              ！平行于y方向网格 'pF$6n;  
*xpPD\{k  
f: P(pump, x),    ！命令f: 定义函数图；P(pump, x)函数是计算x位置处的泵浦光功率 5r d t  
  color = red,  ！图形颜色 fJe5 i6`(  
  width = 3,   ！width线条宽度 ^ (J%)&_\3  
  "pump"       ！相应的文本字符串标签 %4BQY>O)@  
f: P(signal_fw, x),  ！P(signal_fw ,x) 函数是计算x位置处的前向信号光功率 l_,6<wWp  
  color = blue,     J?tnS6V  
  width = 3, [jEA|rd~}  
  "fw signal" >t.PU.OM  
f: P(signal_bw, x),   ！P(signal_bw ,x) 函数是计算x位置处的后向信号光功率 MJa` 4[/  
  color = blue, o ,xy'  
  style = fdashed, 17w{hK4o8O  
  width = 3, 1f?Fuw  
  "bw signal" NdRE,HWd?$  
, 10+Sh  
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 mxe\+j#  
  yscale = 2,            ！第二个y轴的缩放比例 8: uh0  
  color = magenta, = \K/ulZo  
  width = 3, a FWTm,)  
  style = fdashed, ::3[H$  
  "n2 (%, right scale)" KvI/!hl\  
?zVcP=p@  
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 !#E-p?O.  
  yscale = 2, >4HB~9dKU  
  color = red, ]{I>HA5[  
  width = 3, U@(8)[?nxn  
  style = fdashed, %{me<\(  
  "n3 (%, right scale)" 8 -w|~y';  
jP<6Q|5F  
E;"VI2F  
; ------------- u!fZ>kS  
diagram 2:                    ！输出图表2 dN){w _  
E^~ {thf  
"Variation ofthe Pump Power" /Wdrpv-%,1  
h645;sb0  
x: 0, 10 ol`q7i.  
"pump inputpower (W)", @x .I>CL4_  
y: 0, 10 !L_xcov!Y  
y2: 0, 100 #}8VUbJ  
frame YYvX@f  
hx "kucFf f  
hy TQvjU!>  
legpos 150, 150 $0]5b{i]  
8zwH^q[`r  
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 jASK!3pY  
  step = 5, e`5:46k|  
  color = blue, P#;pQC  
  width = 3, J>nta?/,X  
  "signal output power (W, leftscale)",     ！相应的文本字符串标签 7mb5z/N  
  finish set_P_in(pump, P_pump_in) 3@<m/%  
9mpQusM  
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 _sHeB7K  
  yscale = 2, c|4_nT 2  
  step = 5, $A(3-n5=  
  color = magenta, ~\%H0.P6  
  width = 3, .0|_J|{  
  "population of level 2 (%, rightscale)", kC'm |Y@T  
  finish set_P_in(pump, P_pump_in) ~fO#En  
Af^9WJ  
f: (set_P_in(pump,x); 100 * n_av(3)),   ！改变泵浦信号功率对能级3上激活粒子占比的影响 D9n+eZ  
  yscale = 2, T8j<\0WW  
  step = 5, 9s*UJIL  
  color = red, YKx+z[A/p  
  width = 3, >PGsY[N  
  "population of level 3 (%, rightscale)", 0bGQO&s [  
  finish set_P_in(pump, P_pump_in) 6$fwpW  
V0gu0+u~R  
UZgrSX {  
; ------------- 1+tPd7U  
diagram 3:                         ！输出图表3 *Ym+xu_5  
#;"lBqxY`  
"Variation ofthe Fiber Length" r&XxF >  
X0KUnxw  
x: 0.1, 5 ;47=x1j i  
"fiber length(m)", @x YIYuqtnSJ  
y: 0, 10  mNX0BZ  
"opticalpowers (W)", @y n|PW^kOE/  
frame b_@bS<wsF}  
hx \9} -5  
hy [,|4%Y  
EhN@;D+  
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 ?Y9VviC  
  step = 20,             vNU[K%U  
  color = blue, &2W`dEv]?  
  width = 3, h:vI:V[/X  
  "signal output" ulk yP  
2}ywNVS  
;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 UD5f+,_;  
   step = 20, color = red, width = 3,"residual pump" 6 %T_;"hb  
a & 6-QVk  
! set_L(L_f) {restore the original fiber length } jgw+c3^R_  
H]Gj$P=k  
'EkjySZ]F{  
; ------------- a#3,qp!  
diagram 4:                                  ！输出图表4 D\sh +}"  
cty  
"TransverseProfiles" q4u-mM7#7  
[wUJ ~~2#  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) eZ(o_  
?/KkN3Y_j[  
x: 0, 1.4 * r_co /um JZD&u6tB   
"radialposition (µm)", @x .r-kH&)"GU  
y: 0, 1.2 * I_max *cm^2 v<?k$ e5  
"intensity (W/ cm&sup2;)", @y 'Ub\8<HfJU  
y2: 0, 1.3 * N_Tm B5va4@  
frame JRw)~Tg @  
hx Ly6) ,[q~  
hy &s&Ha{(!w  
BCr*GtR)W  
f: N_dop(1, x * um,0),      ！掺杂浓度的径向分布 <P c;8[  
  yscale = 2, a3BlydSlf  
  color = gray, L4Si0 K  
  width = 3, <U""CAE  
  maxconnect = 1, m pM,&7}  
  "N_dop (right scale)" ~"vRH  
6;}FZ  
f: I(pump, -1, x *um, 0) * cm^2,    ！泵浦光沿光纤径向的强度分布 U9q6m3#$  
  color = red, :D=y<n;S+  
  maxconnect = 1,           ！限制图形区域高度，修正为100%的高度 &4Y@-;REt  
  width = 3, kL%o9=R1  
  "pump" Je~<2EsQ  
==~ lc;  
f: I(signal_fw, -1,x * um, 0) * cm^2,  ！信号光沿光纤径向的强度分布 7p,!<X}%  
  color = blue, `,FvYA"  
  maxconnect = 1, rh(77x1|(G  
  width = 3, D-\z'gS  
  "signal" Iy {&T#e"  
4m/L5W:K  
ro@`S:  
; ------------- EeS VY  
diagram 5:                                  ！输出图表5 Jgf= yri  
j;i7.B"[  
"TransitionCross-sections" ,"4  
`T$CUlt6  
I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) GvD{I;  
Pb@9<NXm'  
x: 1450, 2050 -8,lXrH  
"wavelength(nm)", @x ;=?KQq f  
y: 0, 0.6 [d,")Ng  
"cross-sections(1e-24 m&sup2;)", @y rfc;   
frame =Ev* Q[  
hx ADN  
hy ZG)%vB2c  
x-ShY&k  
f: s12_Tm(x * nm) /1e-24,      ！Tm3+吸收截面与波长的关系 +"2IQme5  
  color = red, 9WsGoZP n  
  width = 3, Wq]Lb:&{a  
  "absorption" "]D2}E>U;  
f: s21_Tm(x * nm) /1e-24,  ！Tm3+发射截面与波长的关系 HESORa;  
  color = blue, IH0qx_;P&  
  width = 3, Fm{`?!  
  "emission" [1gWc`#  
@-Js)zcl q  
lileisgsz 2021-09-28 09:47
感谢，视频上有点看不清楚
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