(*
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Demo for program"RP Fiber Power": thulium-doped fiber laser, "*++55
pumped at 790 nm. Across-relaxation process allows for efficient W_[|X}lWP
population of theupper laser level. AW,v
*) !(* *)注释语句 ,:#,}w_HyO
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diagram shown: 1,2,3,4,5 !指定输出图表 &a%WM
; 1: "Powersvs. Position" !分号是注释;光纤长度对功率的影响 Jv_.itc
; 2:"Variation of the Pump Power" !泵浦光功率变化对信号输出功率的影响 X,C*qw@
; 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 YSR mt/
; 4:"Transverse Profiles" !横向分布,横坐标为半径位置 gM4P j[W
; 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 $&cz$jyY
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include"Units.inc" !读取“Units.inc”文件中内容 &49u5&TiP
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include"Tm-silicate.inc" !读取光谱数据 c |>=S)|
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; Basic fiberparameters: !定义基本光纤参数 s|Z:}W?{
L_f := 4 { fiberlength } !光纤长度 &&[zT/]P
No_z_steps := 50 {no steps along the fiber } !光纤步长,大括号{ }是注释,相当于备注 *IC^IC:
r_co := 6 um { coreradius } !纤芯半径 9ky7r;?
N_Tm := 100e24 { Tmdoping concentration } !纤芯Tm离子掺杂浓度 <d5@CA+M
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; Parameters of thechannels: !定义光信道 ev9;Ld
l_p := 790 nm {pump wavelength } !泵浦光波长790nm Vclr)}5
dir_p := forward {pump direction (forward or backward) } !前向泵浦 4&Byl85q
P_pump_in := 5 {input pump power } !输入泵浦功率5W lC0~c=?J
w_p := 50 um {radius of pump cladding } !包层泵浦相应的半径 50um l , ..5
I_p(r) := (r <=w_p) { pump intensity profile } !泵浦光强度分布 n-DaX
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loss_p := 0 {parasitic losses of pump wave } !泵浦光寄生损耗为0 a 6%@d_A
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l_s := 1940 nm {signal wavelength } !信号光波长1940nm pz{'1\_+9
w_s := 7 um !信号光的半径 i3#'*7f%j
I_s(r) := exp(-2 *(r / w_s)^2) !信号光的高斯强度分布 >OV<_(S4
loss_s := 0 !信号光寄生损耗为0 +b^]Pz5
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R_oc := 0.70 {output coupler reflectivity (right side) } !输出耦合反射率 iK#/w1`
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; 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 C-m*?))go
calc )P?IqSEA%
begin R_^/,^1
global allow all; !声明全局变量 ]dSK
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set_fiber(L_f, No_z_steps, ''); !光纤参数 /`[!_4i
add_ring(r_co, N_Tm); T>A{qu
def_ionsystem(); !光谱数据函数 >O#grDXb
pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p); !泵浦光信道 2?W7I/F
signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward); !前向信号光信道 7\ypW $Ot
signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward); !后向信号光信道 hN3u@P^
set_R(signal_fw, 1, R_oc); !设置反射率函数 1D F/6y
finish_fiber();
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end; rkB'Hf
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; Display someoutputs in the Output window (on the right side): !在Output aera区域显示输出 t{dSX?<nt
show "Outputpowers:" !输出字符串Output powers: t
P"\J(x
show"pump: ", P_out(pump):d3:"W" !输出字符串pump:和计算值(格式为3个有效数字,单位W) /6KIl
show"signal: ",P_out(signal_fw):d3:"W" !输出字符串signal:和计算值(格式为3个有效数字,单位W) x[Im%k
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; ------------- [q*%U4qGO
diagram 1: !输出图表1 6/Fzco#N
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"Powers vs.Position" !图表名称 x%N\5 V1
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x: 0, L_f !命令x: 定义x坐标范围 eq[Et
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"position infiber (m)", @x !x轴标签;@x 指示这些字符串沿坐标轴放置 'zZcn" +!
y: 0, 15 !命令y: 定义y坐标范围 e`K)_>^n#
y2: 0, 100 !命令y2: 定义第二个y坐标范围 ytz SAbj
frame !frame改变坐标系的设置 T ?Fcohz(
legpos 600, 500 !图行在图表窗口中的位置(相对于左上角而言) |X19fgk
hx !平行于x方向网格 (u3s"I
d
hy !平行于y方向网格 44ed79ly0)
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f: P(pump, x), !命令f: 定义函数图;P(pump, x)函数是计算x位置处的泵浦光功率 @}-r&/#
color = red, !图形颜色 N|g;W
width = 3, !width线条宽度 ao" %WX
"pump" !相应的文本字符串标签 Lw1EWN6}_&
f: P(signal_fw, x), !P(signal_fw ,x) 函数是计算x位置处的前向信号光功率 !y:%0{l
color = blue, OZY, @c
width = 3, H*^\h?s
"fw signal" xNK1h-t
f: P(signal_bw, x), !P(signal_bw ,x) 函数是计算x位置处的后向信号光功率 N2'qpxOLI
color = blue, {c?JuV4q?
style = fdashed, Ny- [9S-<
width = 3, !$;a[Te
"bw signal" i':i_kU
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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
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yscale = 2, !第二个y轴的缩放比例 a ]Eg!Q
color = magenta, ltB.Q
width = 3, LQ11ba
style = fdashed, IP`6bMd
"n2 (%, right scale)" ;22l"-F
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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 s=6}%%q6
yscale = 2, 6VP`evan
color = red, =L|tp%!
width = 3, :2
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style = fdashed, NcOPL\
"n3 (%, right scale)" /MMd`VrC2
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; ------------- \!vN
diagram 2: !输出图表2 do*}syQ`O
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"Variation ofthe Pump Power" v2r&('pV
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x: 0, 10 /={Js*
"pump inputpower (W)", @x 7!,YNy%
y: 0, 10 <~TP#uAz
y2: 0, 100 vb 1@yQ
frame 7cAXd#sI
hx " 96yp4v@
hy W?yd#j
legpos 150, 150 ^-mRP\5
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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 4n #ov=)-~
step = 5, Gb[`R}^dq
color = blue, Pq*s{
width = 3, 09A
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"signal output power (W, leftscale)", !相应的文本字符串标签 8l}1c=A}Vi
finish set_P_in(pump, P_pump_in) 21s4MagC
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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 !US d9
yscale = 2, mk7&<M
step = 5, l4n)#?Q?
color = magenta, 08X_}97#WF
width = 3, 5@*'2rO&!
"population of level 2 (%, rightscale)", xq6cKtSv
finish set_P_in(pump, P_pump_in) y\N|<+G+
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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 DD" $1o"
yscale = 2, zR!o{8
step = 5, +&zYZA