Optical fiber having enhanced bend resistance

Details Optical fiber having enhanced bend resistance Optical fiber having enhanced bend resistance

1990-03-09

1991-07-16

Lee, John D.

350 9630, G02B 622

Patent

active

050320017

ABSTRACT:
An optical fiber (22) of this invention is suitable for use in tethered vehicle. The optical fiber has a W-shaped refractive index configuration and is characterized by a .DELTA. of at least 0.9% and a cutoff wavelength of less than 1500 nm. Further, the refractive index configuration is such that a core (30) is characterized by a relatively high value of .DELTA..sup.+. The value of .DELTA..sup.+ is at least 0.6% for a single window of operation, whereas for a dual window it is 0.9%. Also, the refractive index configuration of the optical fiber is characterized by a depressed inner cladding portion (32) which has a .DELTA..sup.- of 0.3% and an outer radius about equal to the product of 2.5 and the radius of the core.

REFERENCES:
patent: 4435040 (1984-03-01), Cohen et al.
patent: 4641917 (1987-02-01), Glodis et al.
patent: 4691990 (1987-09-01), Cohen et al.
patent: 4715679 (1987-12-01), Bhagavatula
patent: 4770492 (1988-09-01), Levin et al.
patent: 4836640 (1989-06-01), Gartside, III et al.
patent: 4838643 (1989-06-01), Hodges et al.

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