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1. (WO2017130426) OPTICAL DEVICE
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/2017/130426 International Application No.: PCT/JP2016/055602
Publication Date: 03.08.2017 International Filing Date: 25.02.2016
IPC:
G02B 6/02 (2006.01) ,G02B 6/036 (2006.01)
G PHYSICS
02
OPTICS
B
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
6
Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
02
Optical fibre with cladding
G PHYSICS
02
OPTICS
B
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
6
Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
02
Optical fibre with cladding
036
core or cladding comprising multiple layers
Applicants:
株式会社フジクラ FUJIKURA LTD. [JP/JP]; 東京都江東区木場一丁目5番1号 5-1, Kiba 1-chome, Koto-ku, Tokyo 1358512, JP
Inventors:
植村 仁 UEMURA Hitoshi; JP
竹永 勝宏 TAKENAGA Katsuhiro; JP
Agent:
森村靖男 MORIMURA Yasuo; JP
Priority Data:
2016-01479128.01.2016JP
Title (EN) OPTICAL DEVICE
(FR) DISPOSITIF OPTIQUE
(JA) 光デバイス
Abstract:
(EN) The present invention comprises a plurality of cores and cladding that surrounds the outer circumferential surfaces of the cores and has a lower refractive index than the cores. Along the long direction, each of the cores has a large diameter section, a taper section, and a reduced diameter section, and the refractive index of each of the cores gradually increases from outer circumference to center. For each of the cores, the radial-direction distance r (μm) from center, the refractive index n(r) at distance r, the relative refractive index difference Δ (%) of the center with respect to the cladding, the radius r0 (μm), and a constant α satisfy expressions (1)-(4), and the wavelength λ (nm) of light propagated by the core and the ratio R of the diameter of the core pre-reduction to the diameter of the core post-reduction satisfy expressions (5) and (6). (1) n(r) = Δ∙[1-(r/ro)] (0 ≤ r ≤ r0), (2) 0.9 < Δ < 1.2, (3) 22.5 < r0 < 27.5, (4) 1.9 < α < 2.2, (5) 1530 ≤ λ ≤ 1625, (6) 5581.5/λ < R < 9582.4/λ.
(FR) La présente invention comprend une pluralité d'âmes et une gaine qui entoure les surfaces circonférentielles externes des âmes et a un indice de réfraction inférieur à celui des âmes. Le long de la direction longitudinale, chacune des âmes a une section de grand diamètre, une section conique, et une section à diamètre réduit, et l'indice de réfraction de chacune des âmes augmente graduellement de la circonférence externe au centre. Pour chacune des âmes, la distance de direction radiale r (μm) depuis le centre, l'indice de réfraction n(r) à la distance r, la différence d'indice de réfraction relative Δ (%) du centre par rapport à la gaine, le rayon r0 (μm), et une constante α satisfont les expressions (1) à (4), et la longueur d'onde λ (nm) d'une lumière propagée par l'âme et le rapport R du diamètre de l'âme avant réduction sur le diamètre de l'âme après réduction satisfont les expressions (5) et (6). (1) n(r) = Δ∙[1-(r/ro)] (0 ≤ r ≤ r0), (2) 0.9 < Δ < 1.2, (3) 22.5 < r0 < 27.5, (4) 1.9 < α < 2.2, (5) 1530 ≤ λ ≤ 1625, (6) 5581.5/λ < R < 9582.4/λ.
(JA)  複数のコアとコアの外周面を包囲し屈折率がコアより低いクラッドとを備え、それぞれのコアは、長手方向に沿って大径部、テーパ部及び縮径部を有すると共に外周から中心に向かって屈折率が徐々に高くされ、それぞれのコアにおいて、中心から径方向の距離r[μm]、距離rにおける屈折率n(r)、クラッドに対する中心の比屈折率差Δ[%]、半径r[μm]及び定数αが式(1)から式(4)を満たし、コアに伝搬される光の波長λ[nm]、及び、コアの縮径後の直径に対する縮径前の直径Rが下記式(5)及び式(6)を満たす。 n(r)=Δ・{1-(r/r-α} (0≦r≦r) (1) 0.9<Δ<1.2 (2) 22.5<r<27.5 (3) 1.9<α<2.2 (4) 1530≦λ≦1625 (5) 5581.5/λ<R<9582.4/λ (6)
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Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, KE, KG, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: Japanese (JA)
Filing Language: Japanese (JA)
Also published as:
CN108496100US20190033512