Patent · US Expired

Low bend loss singlemode optical waveguide fiber

US5278931A · kind A · utility

34Cited by
4References
13Claims
0Family size

Assignee

Inventors

Key dates

Filing dateDec 31, 1992
Grant dateJan 11, 1994
Priority date—
Expiry dateDec 31, 2012

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG02B6/03611
  • WIPO fieldOptics
  • WIPO sectorInstruments

Abstract

An optical waveguide fiber with improved bend loss performance while maintaining cutoff wavelength, .lambda..sub.c, and zero dispersion wavelength, .lambda..sub.0, in practical operating ranges. The fiber includes an inner core region with a refractive index delta higher than the rest of the core and a reduced diffusion tail at the core/cladding interface. Optionally, a ring at the outer portion of the core is provided to compensate for increased .lambda..sub.0 which results from the higher inner core refractive index delta. This ring also contributes to the reduced diffusion tail at the core/cladding interface.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.