Accession Number : ADD016480

Title :   Pure-Silica Core Dual-Mode Optical Fiber.

Descriptive Note : Patent, Filed 28 Feb 92, patented 12 Jul 94,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Kamikawa, Neil T ; Nakagawa, Arthur T

Report Date : 12 Jul 1994

Pagination or Media Count : 6

Abstract : An improved dual-mode optical fiber provides for an improved combination of spectral attenuation, bending losses and modal noise and modal dispersion for long-haul transmission at 1550 nm. The dual-mode optical fiber has a pure-silica core and a silica cladding depressed with fluorine so that the core and cladding have a relative refractive index difference, Delta, of about 0.72% and a second-mode cutoff wavelength, Lambda sub c at 1630 nm. Optionally, a non-silica core and cladding can be used for long-haul transmission at 1550 nm. when the core and cladding have a relative refractive index difference, Delta, of about 0.72% and a second-mode cutoff wave-length, Lambda sub c at 1630 nm.

Descriptors :   *FIBER OPTICS, *PATENTS, ATTENUATION, BENDING, CLADDING, CORES, DISPERSIONS, DUAL MODE, FLUORINE, LOSSES, NOISE, REFRACTIVE INDEX, GERMANIUM, FIBER OPTICS TRANSMISSION LINES, TRANSMISSION LOSS

Subject Categories : Fiber Optics and Integrated Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE