Patent ID: 6490398
Filing Date: 2002-12-03
Classification: G02B

Abstract:
An article comprising a length of dispersion-compensating (DC) optical fiber that is designed to support only the fundamental mode of radiation at 1550 nm, the DC fiber being fabricated from silica glass and having a refractive index profile that includes a core region surrounded by a cladding region having a nominal refractive index n4, the core region comprising:a central core having a nominal refractive index n1; a â€œtrenchâ€  surrounding the central core, the trench having a nominal refractive index n2, and a â€œridgeâ€  surrounding the trench, the ridge having a nominal refractive index n3 wherein: 0.0151âˆ’n4<0.035; âˆ’0.0122âˆ’n40.0023âˆ’n4<0.015.