UNCOUPLED MULTICORE OPTICAL FIBER

Abstract: an uncoupled multicore optical fiber may include: a common cladding having a refractive index �and an outer diameter ranging from about 120 �m to about 130 �m; and a plurality of core portions disposed within the common cladding. at least one core portion may include: a central axis; an alkali doped core region extending from the central axis and having a relative refractive index �; a trench region encircling the core region and having a relative refractive index �, wherein �>�>�; an attenuation less than 0.165 db/km at 1550 nm; an effective area ranging from about 75 �mto about 135 �mat 1550 nm; and a cable cutoff wavelength less than or equal to 1530 nm. the common cladding may directly contact the trench region. a counter-propagating crosstalk at 1550 nm between two adjacent core portions may be less than or equal to −40 db/100 km.

Inventor(s): John David Downie, Oleg Valeryevich Sinkin, Pushkar Tandon

CPC Classification: G02B6/02042 (Optical fibres with cladding {with or without a coating})

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