Zero dispersion single mode optical fiber with center core and s

Details Zero dispersion single mode optical fiber with center core and s Zero dispersion single mode optical fiber with center core and s

1986-08-29

1988-07-05

Lee, John

350 9630, 350 9631, G02B 622

Patent

active

047550228

ABSTRACT:
A 1.5 .mu.m zero dispersion single mode optical fiber comprising a center core, a side core disposed on an outer side of the center core and having a refractive index lower than that of the center core, and a cladding portion disposed on an outer side of the side core. Each of the refractive indices of the center core and the side core has a step-like profile in the direction of the radius of the optical fiber. The bending loss is low. The mode field diameter can be increased without deteriorating the bending loss, and the splice loss can be reduced. The chromatic dispersion varies only to a small extent with respect to changes in the core diameter, so that the zero dispersion wavelength can be well controlled.

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Cohen et al, "Tailoring Zero Chromatic Dispersion into the 1.5-1.6 .mu.m Low-Loss Spectral Region of Single-Mode Fibres", Electronic Letters, 1979, vol. 15, No. 12, pp. 334-335.
Tanaka et al, "An Exact Analysis of Cylindrical Fiber with Index Distribution by Matrix Method and Its Application to Focusing Fiber", The Transactions of the Institute of Electronics and Communication Engineers of Japan, vol. E59, No. 11, Nov. 1976, pp. 1-8.
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