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Optical fiber for wavelength division multiplexing optical transmission system using densely spaced optical channels

A wavelength division multiplexing and optical transmission technology, applied in the direction of multi-layer core/clad fiber, optics, clad fiber, etc., can solve the problem of not easy S-band optical transmission and so on

Inactive Publication Date: 2005-08-03
LG CABLE INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0046] Since ordinary NZ-DSFs exhibit zero dispersion in the S-band and four-wave mixing occurs, they are not easily applied to optical transmission in the S-band

Method used

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  • Optical fiber for wavelength division multiplexing optical transmission system using densely spaced optical channels
  • Optical fiber for wavelength division multiplexing optical transmission system using densely spaced optical channels
  • Optical fiber for wavelength division multiplexing optical transmission system using densely spaced optical channels

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Embodiment Construction

[0078]The present invention provides a single-mode optical fiber designed to transmit light in the wavelength range of 1400nm to 1600nm, in particular around 1550nm wavelength. The fiber consists of a core that concentrates light toward the center and a cladding that surrounds the core.

[0079] The optical fiber according to the present invention exhibits a dispersion value of about 7 to 10 ps / nm-km at a wavelength of about 1550 nm, and a dispersion slope of 0.04 to 0.06 ps / nm 2 -km. The fiber has an effective area of ​​approximately 50 μm 2 or greater, the zero dispersion wavelength is 1450nm or less, and the cutoff wavelength is 1200nm or less. The optical fiber of the present invention can effectively suppress the four-wave mixing phenomenon that occurs when the signal is transmitted in the WDM mode using a 50 GHz channel spacing, so that the distortion of the signal transmitted through it can be minimized, and at the same time it can be used to compensate for the disper...

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Abstract

Disclosed is an optical fiber having a desired dispersion value to sufficiently suppress a non-linearity phenomenon, that is, a four-wave mixing phenomenon, occurring at a channel spacing of 50 GHz while minimizing the expense consumed for a compensation for dispersion. The optical fiber satisfies optical characteristics defined by a dispersion value of 7 to 10 ps / nm-km at a wavelength of 1,550 nm, a zero dispersion wavelength of 1,450 nm or less, and a cut-off wavelength of 1,250 nm or less. The optical fiber includes a core having a desired diameter (d1) and a desired refractive index (n1), the cladding surrounding the core and having a refractive index (ncl) less than the (n1), of the core (ncl < n1) or (n2) less than the outer cladding (n2 < ncl). The (n2) of the inner cladding may also be less than the (n1) of the core and more than the (ncl) of the outer cladding.

Description

technical field [0001] The present invention relates to an optical fiber (hereinafter referred to as "optical fiber") used in a wavelength division multiplexing (WDM) optical transmission system, and more particularly to an Fiber optics caused by nonlinear effects. Furthermore, the present invention also relates to an optical fiber which can effectively operate even when a reduced channel spacing is used for increasing the transmission capacity, and which can be applied even to the optical fiber which is expected to be used in future WDM optical transmission systems. It is the 1450nm to 1530nm band of the "S-band". Background technique [0002] Optical fiber can transmit a large amount of data in a short time while reducing transmission loss. With the development of modern communication, the application of this optical fiber has greatly increased. In particular, optical transmission technology has been greatly advanced due to the development of new types of optical fibers...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/00G02B6/036
CPCG02B6/02257G02B6/03633G02B6/03627G02B6/03644G02B6/00
Inventor 金大原李权茂李东旭金东英郑允喆
Owner LG CABLE INC