UNCOUPLED MULTICORE OPTICAL FIBER WITH ALKALI DOPED CORES

Abstract: embodiments include a multicore optical fiber including: a common cladding having a refractive index �and an outer radius of 70 �m to 95 �m; a coating having an outer radius of 120 �m to 127.5 �m; and a plurality of core portions; wherein at least one core portion comprises: an alkali-doped core region having a relative refractive index �and a trench region having a relative refractive index �, wherein �>�>�; an attenuation less than 0.165 db/km, and an effective area of 75 �mto 135 �mat a wavelength of 1550 nm; and a cable cutoff wavelength less than or equal to 1530 nm; wherein the multicore optical fiber has a core multiplicity factor of 0.028 to 0.045; and wherein a counter-propagating crosstalk at 1550 nm between adjacent core portions is less than −40 db per 100 km.

Inventor(s): Kevin Wallace Bennett, Pushkar Tandon

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

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