(* 1-:{&!
Demo for program"RP Fiber Power": thulium-doped fiber laser,
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pumped at 790 nm. Across-relaxation process allows for efficient 4}MZB*);0
population of theupper laser level. 0VwmV_6'<W
*) !(* *)注释语句 2:tO "
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diagram shown: 1,2,3,4,5 !指定输出图表 0w<G)p~%n
; 1: "Powersvs. Position" !分号是注释;光纤长度对功率的影响 8*m=U@5]
; 2:"Variation of the Pump Power" !泵浦光功率变化对信号输出功率的影响 {*Tnl-m~
; 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 L"ob))GF
; 4:"Transverse Profiles" !横向分布,横坐标为半径位置 _{ f7e^;
; 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 Q=T/hb
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include"Units.inc" !读取“Units.inc”文件中内容 GjGt'
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include"Tm-silicate.inc" !读取光谱数据 `8<h aU
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; Basic fiberparameters: !定义基本光纤参数 hB 36o9|9
L_f := 4 { fiberlength } !光纤长度 @l^BW*BCo
No_z_steps := 50 {no steps along the fiber } !光纤步长,大括号{ }是注释,相当于备注 ';.n#
r_co := 6 um { coreradius } !纤芯半径 8@Hl0{q
N_Tm := 100e24 { Tmdoping concentration } !纤芯Tm离子掺杂浓度 $ ";NS6 1
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; Parameters of thechannels: !定义光信道 1@p'><\
l_p := 790 nm {pump wavelength } !泵浦光波长790nm Ub9p&=]h
dir_p := forward {pump direction (forward or backward) } !前向泵浦 +!9&zYu!
P_pump_in := 5 {input pump power } !输入泵浦功率5W \Czuf
w_p := 50 um {radius of pump cladding } !包层泵浦相应的半径 50um ds|L'7
I_p(r) := (r <=w_p) { pump intensity profile } !泵浦光强度分布 R#w9%+
loss_p := 0 {parasitic losses of pump wave } !泵浦光寄生损耗为0 fjwUh>[ }
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l_s := 1940 nm {signal wavelength } !信号光波长1940nm /By`FW Y
w_s := 7 um !信号光的半径 ed6eC8@
I_s(r) := exp(-2 *(r / w_s)^2) !信号光的高斯强度分布 ?PSVVUq,Z
loss_s := 0 !信号光寄生损耗为0 /\C5`>x
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R_oc := 0.70 {output coupler reflectivity (right side) } !输出耦合反射率 6<N Q/*(/
"{Jq6):mp
; 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 NNM+Z:
calc .Bb86Y=3
begin ]<B@g($
global allow all; !声明全局变量 ,[t>N>10TH
set_fiber(L_f, No_z_steps, ''); !光纤参数 }6#u}^gy
add_ring(r_co, N_Tm); #V:28[
def_ionsystem(); !光谱数据函数 Al 1BnFB
pump := addinputchannel(P_pump_in, l_p,'I_p', loss_p, dir_p); !泵浦光信道 wS%aN@ay3
signal_fw := addinputchannel(0, l_s, 'I_s',loss_s, forward); !前向信号光信道 whdoG{/
signal_bw := addinputchannel(0, l_s, 'I_s',loss_s, backward); !后向信号光信道 Z{gJ m9
set_R(signal_fw, 1, R_oc); !设置反射率函数 p@Ng.HE
finish_fiber(); 6l|,J`G
end; ZuIw4u(9
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; Display someoutputs in the Output window (on the right side): !在Output aera区域显示输出 4~YPLu
show "Outputpowers:" !输出字符串Output powers: +kN/-UsB
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) 9u2Mra
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) ?!d\c(5Gt
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; ------------- t3b64J[A{
diagram 1: !输出图表1 XBF]|}%
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"Powers vs.Position" !图表名称 ZlxJY%oeu
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x: 0, L_f !命令x: 定义x坐标范围 Am&PH(}L
"position infiber (m)", @x !x轴标签;@x 指示这些字符串沿坐标轴放置 cm!|A)~
y: 0, 15 !命令y: 定义y坐标范围 ,j|9Bs
y2: 0, 100 !命令y2: 定义第二个y坐标范围 Pk6l*+"r<
frame !frame改变坐标系的设置 u{S J#3C5
legpos 600, 500 !图行在图表窗口中的位置(相对于左上角而言) B]-~hP
hx !平行于x方向网格 .o?"=Epo
hy !平行于y方向网格 ck"lX[d1
nC;2wQ6aO
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 Jfs$VGZP;
color = red, !图形颜色 @ a?^2X^
width = 3, !width线条宽度 j4hiMI;
"pump" !相应的文本字符串标签 7[}K 2.W.
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 se:lKZZ]
color = blue, a&*fk ?o
width = 3, $Z8=QlG>
"fw signal" 8H})Dq%d 7
f: P(signal_bw, x), !P(signal_bw ,x) 函数是计算x位置处的后向信号光功率 Ous_269cM
color = blue, h;(#^+LH
style = fdashed, D3BNA]P\2@
width = 3, Ka$YKY,
"bw signal" ~c*$w O\
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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 B- `,h pp
yscale = 2, !第二个y轴的缩放比例 a?]"|tQ'
color = magenta, hQT
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width = 3, y:>'1"2`
style = fdashed, B]xZ
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"n2 (%, right scale)" -(Y( K!n
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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 }h PFd
yscale = 2, S3oSc<&2
color = red, wx,yx3c (
width = 3, ckWK+
style = fdashed, &1:_+
"n3 (%, right scale)" $aFCe}3b<
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; ------------- xpb,Nzwt^
diagram 2: !输出图表2 =d{B.BP(
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"Variation ofthe Pump Power" PqOPRf
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x: 0, 10 mEUdJvSG(
"pump inputpower (W)", @x !((J-:=
y: 0, 10 +mgmC_Q(0
y2: 0, 100 jM'kY|<g;
frame P!apAr
hx "Y>
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hy L/U^1=Wi*O
legpos 150, 150 aU)NbESu
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f: (set_P_in(pump, x);P_out(signal_fw)), !set_P_in(pump,x)改变泵浦信道功率;P_out(signal_fw)输出前向信号光 l|z0aF;z
step = 5, zP8a=Iv
color = blue, vl"l
width = 3, 0^L>J"o
"signal output power (W, leftscale)", !相应的文本字符串标签 ^bZ'z
finish set_P_in(pump, P_pump_in) ^4\hZ
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f: (set_P_in(pump,x); 100 * n_av(2)), !改变泵浦信号功率对能级2上激活粒子占比的影响 (rHS2SA\5
yscale = 2, <h*r
step = 5, a%"27
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color = magenta, Cmsg'KqqT
width = 3, ID#p5`3n
"population of level 2 (%, rightscale)", f[AN=M"B"s
finish set_P_in(pump, P_pump_in) L>&o_bzp
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f: (set_P_in(pump,x); 100 * n_av(3)), !改变泵浦信号功率对能级3上激活粒子占比的影响 {c;][>l
yscale = 2, *XlbD
step = 5, j`'9;7h M6
color = red, KXQ &u{[<
width = 3, _>G.
"population of level 3 (%, rightscale)", u?J!3ZEtb
finish set_P_in(pump, P_pump_in) r\+0J`
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/*zngp@
; ------------- :oYz=c
diagram 3: !输出图表3 Q(3Na 6
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"Variation ofthe Fiber Length" 8R) 0|v&;
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x: 0.1, 5 a+U^mPe
"fiber length(m)", @x A*$JF>`7
y: 0, 10 _{]\} =@
"opticalpowers (W)", @y eVXlQO
frame )\qA[rTG
hx LkUYh3
hy TQ/EH~Sz
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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 E=H>|FgS
step = 20, `Mh3v@K:
color = blue, {Tps3{|wt
width = 3, SWX[|sjdB
"signal output" i1(}E#
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;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 kK0.j)(
step = 20, color = red, width = 3,"residual pump" 1&,d,<
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! set_L(L_f) {restore the original fiber length } nE2w?
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; ------------- _V.MmA
diagram 4: !输出图表4 EO_:C9=d{
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"TransverseProfiles" 8NE+G.:G
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I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) Rz #&v
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x: 0, 1.4 * r_co /um y:m
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"radialposition (µm)", @x u . xUM
y: 0, 1.2 * I_max *cm^2 !a.|URa7
"intensity (W/ cm²)", @y :aIS>6
y2: 0, 1.3 * N_Tm hR g?H
frame V!{}%;f
hx Sj[iKCEKtv
hy i7%v2_
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f: N_dop(1, x * um,0), !掺杂浓度的径向分布 /.1yxb#Z?,
yscale = 2, @L 9C_a
color = gray, +nz6+{li\
width = 3, +.EP_2f9
maxconnect = 1, ]T?Py)
"N_dop (right scale)" |[ )e5Xhd
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f: I(pump, -1, x *um, 0) * cm^2, !泵浦光沿光纤径向的强度分布 MJzY|
color = red, c SV`?[a
maxconnect = 1, !限制图形区域高度,修正为100%的高度 mB.j?@Y%
width = 3, jDV;tEY#^
"pump" _K4E6c_
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f: I(signal_fw, -1,x * um, 0) * cm^2, !信号光沿光纤径向的强度分布 kL7n`o
color = blue, |+aUy^
maxconnect = 1, :pp@x*uNP
width = 3, H,{WrWA
"signal" xa=Lu?t%<
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; ------------- S{0iPdUC
diagram 5: !输出图表5 ev{;}2~V
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"TransitionCross-sections" a(eKb2 CX
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I_max :=maxr(I(pump, -1, 0, 0), I(signal_fw, -1, 0, 0)) j@Ta\a-,x
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x: 1450, 2050 Nuebxd
"wavelength(nm)", @x }MiEbLduN
y: 0, 0.6 38 -vt,|
"cross-sections(1e-24 m²)", @y 5Y3L
frame YAc~,N
hx ,(@J Ntx
hy +wHrS}I#g
%$*WdK#
f: s12_Tm(x * nm) /1e-24, !Tm3+吸收截面与波长的关系 *6`};ASK
color = red, 8E+]yB"
width = 3, nj(\+l5
"absorption" ,u<oAI`
f: s21_Tm(x * nm) /1e-24, !Tm3+发射截面与波长的关系 2LTMt?
color = blue, .,9e~6}
width = 3, 0DsW1
"emission" =-m"y~{>3
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