Pure-silica core dual-mode optical fiber

Details Pure-silica core dual-mode optical fiber Pure-silica core dual-mode optical fiber

1992-02-28

1994-07-12

Bovernick, Rodney B.

Optical waveguides

Optical fiber waveguide with cladding

385144, G02B 610

Patent

active

053296079

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 wavelength, .lambda..sub.c, at 1630 nm.

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