1 1 LD [1] 2 3dB Er 2 [2] 1 P 1330cm 1 P 2 O 5 500cm 1 SiO 2 Ge,Si P Er 1480nm Yb 1289nm nm nm 3 1: P [3] 1330cm 1 510cm 1 [5
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1 1 1 LD [1] 2 3dB Er 2 [2] 1 P 1330cm 1 P 2 O 5 500cm 1 SiO 2 Ge,Si P Er 1480nm Yb (19W@1100nm) 1289nm nm nm 3 1: P [3] 1330cm 1 510cm 1 [5] 2: 3 2 FBG(Fiber Bragg Gratings) 1 2 R > 99% FBG 3 R > 99% R=15% FBG P 500m W W,1.27W,4.68W % FBG % 1480nm
2 P P P + L,P L σ Pa, σ La σ Pe, σ Le N N 1 N 2 Γ P, Γ L τ l P,l L 3: ν P, ν L A h (4) σ Pa σ Pe (5) σ La σ Le z=0 P P = P P 0 (6) P + L =0.04 P L (7) 4: z=z P L = P + L (8) LD mW Er 100% Er nm 2.5nm 4.68W - 25% 3 Er 3.1 Er Er nm 1550nm µs 10ms 2 2 N 2 = W Pe + W Le N (1) W Pa + W Pe + W La + W Le + τ 1 σ Pa P P σ Pe P P W Pa = Γ P,W Pe = Γ P hν P A hν P A σ La (P + W La = Γ L + P L ) σ Le (P + L,W Le = Γ L + P L ) L (3) hν L A hν L A dp P dz ª = Γ P σpa (N N 2 ) σ Pe N 2 PP l P P P (4) dp ± L dz h = ± Γ L σle N 2 σ La (N N 2 ) ª P ± L l L P ± i L (2) (5) Er NUFERN EDF555 1 Er 1: [5][6] Fiber Loss l[db/m] Fiber Parameter Core Diameter [µm] 4.6 FiberDiameter[µm] 125 Cutoff Wavelength [nm] 910 Metastable lifetime τ[ms] 10 Erbium ions N[m 3 ] Overlap integral between the optical mode Absortion cross section σa[m Emission cross section σe[m m 5 9m 1.65W 6 15m 6m 6
3 5: Laser B W Out A 1.36W Out B 1.47W WDM Laser A FBG-A FBG-B Laser A nm Laser B nm 0.1nm FBG A 6: 1484nm,2W 1.58W 6m Er 8: 3.2 Er 9: EDFL 7: N=2 Er 7 Er (4.1W@1484nm) 3dB W WDM 6m Er FBG- A(R>99%@ nm) 4% Laser A WDM Er Er 3dB 10 Er Out A
4 [7] 10: Er 4.1W OutA2.54W Out B 0.17W Out A Out A Out B 13: µm FBG-A 5dB 14 FBG-A FBG-B 15 FBG-A FBG-B 14: 11: 12: 4.2 FBG 1µm 0.014nm FBG-A FBG-B 15: 0.5nm FBG-A FBG-B
5 0.6nm 2 FBG-A FBG-B 2 0.5nm FBG 2 3dB 2 0.5dB Out B Out A Out B 0.0dB Out A 2.51W,Out B 0.19W 8.9dB Out A 0.06W,Out B 2.52W : Out A 2.48W,Out B 0.21W Out A 2.05W,Out B0.63W 16: Out A Out B 0.4dB 18: Out A 0.15W,Out B 2.57W A Out B 2.65W 19 B A A B A
6 W : B 20: 20 3dB 1 2 A 1 (z), θ = 0,A 2 (z), θ = π 2 1 A 1 (0), θ = 0,A 2 (z), θ = π Er A,B,C,D (4.1W@1484nm) 3dB 2 4 1W Out A 0.68W,Out B 0.64W,Out C 0.62W,Out D 0.62W Er nm,4.68W Er nm,1.36W nm,1.47W Er 3dB FBG 4 2 [1] V.A.Kozlov,J.Hernández-Cordero, and T.F.M orse, Allfiber coherent beam combining of fiber lasers, Optics Letters,Vol.24,No.24,(1999),pp [2],,, (1997). [3] Mahendra Prabhu, RAMAN AND BRILLOUIN/RAMAN FIBER LASER USING PHOSPHOSILICATE FIBER, Ph.D Thesis,The Univertsity of Electro Communications, (2000). [4] A.BERTONI, Analysis of the efficiency of a third order cascaded Raman laser operating at the wavelength of 1.24µm,Optical and Quantum Electronics, Vol.29,(1997),pp [5] C.Randy Giles and Emmanuel Desurvire, Modeling Erbium-Doped Fiber Amplifiers, Jounal of Lightwave Technology,Vol.9,No.2,(1991),pp : N=4 Er 4 4 6dB [6] C.R.Giles,C.A.Burrus,D.J.DiGiovanni,N.K.Dutta,and G.Raybon, Characterization of Erbium-Doped Fibers and Application to Modeling 980-nm and 1480-nm Pumped Amplifiers, IEEE Photonics Technology Letters,Vol.3,No.4, (1991),pp [7],,,Vol.28,No.5,(1999),pp
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A B A.70g/cm 3 B.74g/cm 3 B C 70at% %A C B at% 80at% %B 350 C γ δ y=00 x-y ρ l S ρ C p k C p ρ C p T ρ l t l S S ξ S t = ( k T ) ξ ( ) S = ( k T) ( ) t y ξ S ξ / t S v T T / t = v T / y 00 x v S dy dx
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9 O y O ( O ) O (O ) 3 y O O v t = t = 0 ( ) O t = 0 t r = t P (, y, ) r = + y + (t,, y, ) (t) y = 0 () ( )O O t (t ) y = 0 () (t) y = (t ) y = 0 (3) O O v O O v O O O y y O O v P(, y,, t) t (, y,, t )
0 ϕ ( ) (x) 0 ϕ (+) (x)ϕ d 3 ( ) (y) 0 pd 3 q (2π) 6 a p a qe ipx e iqy 0 2Ep 2Eq d 3 pd 3 q 0 (2π) 6 [a p, a q]e ipx e iqy 0 2Ep 2Eq d 3 pd 3 q (2π)
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- i - - i - Application of All-Optical Switching by Optical Fiber Grating Coupler Yasuhiko Maeda Abstract All-optical switching devices are strongly required for fast signal processing in future optical
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ETL NEWS 1999.9 ETL NEWS 1999.11 Establishment of an Evaluation Technique for Laser Pulse Timing Fluctuations Optoelectronics Division Hidemi Tsuchida e-mail:tsuchida@etl.go.jp A new technique has been
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6 2 T γ T B (6.4) (6.1) [( d nm + 3 ] 2 nt B )a 3 + nt B da 3 = 0 (6.9) na 3 = T B V 3/2 = T B V γ 1 = const. or T B a 2 = const. (6.10) H 2 = 8π kc2
![6 2 T γ T B (6.4) (6.1) [( d nm + 3 ] 2 nt B )a 3 + nt B da 3 = 0 (6.9) na 3 = T B V 3/2 = T B V γ 1 = const. or T B a 2 = const. (6.10) H 2 = 8π kc2](/thumbs/92/109118076.jpg "6 2 T γ T B (6.4) (6.1) [( d nm + 3 ] 2 nt B )a 3 + nt B da 3 = 0 (6.9) na 3 = T B V 3/2 = T B V γ 1 = const. or T B a 2 = const. (6.10) H 2 = 8π kc2")
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27.2.9 TOF-SIMS SIMS TOF-SIMS SIMS Mass Spectrometer ABCDE + ABC+ DE + Primary Ions: 1 12 ions/cm 2 Molecular Fragmentation Region ABCDE ABCDE 1 15 atoms/cm 2 Molecular Desorption Region Why TOF-SIMS?
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1 I 1.1 ± e = = - =1.602 10 19 C C MKA [m], [Kg] [s] [A] 1C 1A 1 MKA 1C 1C +q q +q q 1 1.1 r 1,2 q 1, q 2 r 12 2 q 1, q 2 2 F 12 = k q 1q 2 r 12 2 (1.1) k 2 k 2 ( r 1 r 2 ) ( r 2 r 1 ) q 1 q 2 (q 1 q 2
128 3 II S 1, S 2 Φ 1, Φ 2 Φ 1 = { B( r) n( r)}ds S 1 Φ 2 = { B( r) n( r)}ds (3.3) S 2 S S 1 +S 2 { B( r) n( r)}ds = 0 (3.4) S 1, S 2 { B( r) n( r)}ds
127 3 II 3.1 3.1.1 Φ(t) ϕ em = dφ dt (3.1) B( r) Φ = { B( r) n( r)}ds (3.2) S S n( r) Φ 128 3 II S 1, S 2 Φ 1, Φ 2 Φ 1 = { B( r) n( r)}ds S 1 Φ 2 = { B( r) n( r)}ds (3.3) S 2 S S 1 +S 2 { B( r) n( r)}ds
keisoku01.dvi
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知能科学：ニューラルネットワーク
2 3 4 (Neural Network) (Deep Learning) (Deep Learning) ( x x = ax + b x x x ? x x x w σ b = σ(wx + b) x w b w b .2.8.6 σ(x) = + e x.4.2 -.2 - -5 5 x w x2 w2 σ x3 w3 b = σ(w x + w 2 x 2 + w 3 x 3 + b) x,
知能科学：ニューラルネットワーク
2 3 4 (Neural Network) (Deep Learning) (Deep Learning) ( x x = ax + b x x x ? x x x w σ b = σ(wx + b) x w b w b .2.8.6 σ(x) = + e x.4.2 -.2 - -5 5 x w x2 w2 σ x3 w3 b = σ(w x + w 2 x 2 + w 3 x 3 + b) x,
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