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1. (WO2014206464) BEND-INSENSITIVE MULTIMODE OPTICAL FIBER WITH REDUCED IMPACT OF LEAKY MODES
Latest bibliographic data on file with the International Bureau   

Pub. No.: WO/2014/206464 International Application No.: PCT/EP2013/063417
Publication Date: 31.12.2014 International Filing Date: 26.06.2013
IPC:
G02B 6/028 (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
028
with core or cladding having graded refractive index
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: DRAKA COMTEQ BV[--/NL]; De Boelelaan 7 1083 HJ Amsterdam, NL
Inventors: MOLIN, Denis; FR
BIGOT-ASTRUC, Marianne; FR
SILLARD, Pierre; FR
ACHTEN, Franciscus, Johannes; NL
Agent: WINDAL, Gaëlle; Cabinet Vidon Technopôle Atalante 16B rue de Jouanet 35703 Rennes Cedex 7, FR
Priority Data:
Title (EN) BEND-INSENSITIVE MULTIMODE OPTICAL FIBER WITH REDUCED IMPACT OF LEAKY MODES
(FR) FIBRE OPTIQUE MULTIMODE À INTENSITÉ COURBE AYANT UN IMPACT RÉDUIT SUR LES MODES DE FUITE
Abstract:
(EN) The invention relates to a multimode optical fiber comprising an optical core and an optical cladding surrounding the optical core, the optical core having a refractive graded- index profile, the optical cladding comprising: an inner layer surrounding said optical core, an intermediate layer, called "depressed trench", surrounding said inner layer, an outer layer surrounding said depressed trench and having a constant refractive index, said depressed trench having a width W and a negative refractive index difference Δnt with respect to the outer layer, and being designed so as to satisfy the following inequality: |0.585677 - 114.681 x S + 13.7287 x S2 + 18.7343 x S x W - 4.61112 x S x Δnt.103 - 0.913789 x W x Δnt.103| +2 x W x Δnt.103 < -30 wherein: S is the width of the inner cladding, which is comprised between 0.6 μm and 1.6 μm; Δnt is comprised between -11.10-3 and -4.10-3; W x Δnt.103 is lower than -25 μm.
(FR) L'invention concerne une fibre optique multimode comprenant une âme optique et une gaine optique entourant l'âme optique, l'âme optique ayant un profil à indice gradé en réfraction tandis que la gaine optique comprend: une couche interne entourant l'âme optique, une couche intermédiaire appelée tranchée en retrait entourant la couche interne, une couche externe entourant la « tranchée en retrait » et possédant un indice de réfraction constant, la tranchée en retrait possèdant une largeur W et une différence d'indice de réfraction négative Δnt par rapport à la couche externe, et étant conçue pour répondre à l'inégalité suivante: |0.585677 - 114.681 x S + 13.7287 x S 2 + 18.7343 x S x W - 4.61112 x S x Δn t.103 - 0.913789 x W x Δn t.103| +2 x W x Δn t.103 < -30 où: S est la largeur de la gaine interne comprise entre 0,6 μm et 1,6 μm; Δnt varie de -11,10-3 à -4,10-3; W x Δn t.103 est inférieur à -25 μm.
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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, IS, JP, KE, KG, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, 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, 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, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (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: English (EN)
Filing Language: English (EN)