Low bend loss singlemode optical waveguide fiber

Details Low bend loss singlemode optical waveguide fiber Low bend loss singlemode optical waveguide fiber

1992-12-31

1994-01-11

Bovernick, Rodney B.

Optical waveguides

Optical fiber waveguide with cladding

Utilizing multiple core or cladding

385127, G02B 622

Patent

active

052789314

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.

REFERENCES:
patent: 4715679 (1987-12-01), Bhagavatula
patent: 4877304 (1989-10-01), Bhagavatula
patent: 5032001 (1991-07-01), Shang
patent: 5111525 (1992-05-01), Hartouni
Miya et al., "VAD Single-Mode Fiber Fabrication Techniques-1.5 .mu.m Dispersion-Free Single-Mode Fibers", Review of Elec. Comm. Laboratories, vol. 32, No. 3, pp. 411-417, 1984.
Lapp et al., "Segmented-Core Single-Mode Fiber Optimized for Bending Performance", J. of Lightwave Tech., vol. 6, No. 10, pp. 1462-1465, Oct. 1988.

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