Optical fiber and method of manufacturing the same

A technology of optical fiber and fiber core, applied in the optical fiber field of submarine optical cable, can solve the problem of reducing the replacement cost of seawater intrusion

Inactive Publication Date: 2011-05-11
HITACHI CABLE
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  • Abstract
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Problems solved by technology

As a result, there is a problem that it is not possible to effectively reduce the replacement cost of seawater intrusion

Method used

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  • Optical fiber and method of manufacturing the same
  • Optical fiber and method of manufacturing the same
  • Optical fiber and method of manufacturing the same

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Embodiment Construction

[0025] Preferred embodiments of the present invention will be described with reference to the drawings.

[0026] figure 1 It is a cross-sectional view in the direction of the central axis of the optical fiber according to a preferred embodiment of the present invention. figure 2 It is a side cross-sectional view of an optical fiber 1 according to a preferred embodiment of the present invention.

[0027] A suitable embodiment of the present invention is an optical fiber 1, which is an optical fiber 1 for a submarine optical cable, and is characterized in that it has a core 2 disposed in the central axis region, is disposed on the outer periphery of the core 2, and has a An inner cladding 3 with a small refractive index is provided on the outer periphery of the inner cladding 3, and a bubble layer 4 having a plurality of long-hole-shaped bubbles 5 is provided on the outer periphery of the bubble layer 4, and has a The core 2 has an outer cladding 6 having a refractive index e...

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Abstract

The invention provides an optical fiber and a method of manufacturing the same, can improve optical signal transmission characteristic and reduce the replacing cost of seawater intrusion position when the fiber is broken.An optical fiber comprising: a core formed in a center axis area; an inner clad layer, disposed around the core, having a refractive index smaller than that of the core; a pore layer, disposed around the inner clad layer, having a plurality of elongated pores; and an outer clad layer, disposed around the pore layer, having a refractive index equal to or smaller than the refractive index of the core, wherein a length of the elongated pores is not larger than 200 m.

Description

technical field [0001] The present invention relates to an optical fiber with suppressed nonlinear phenomena, especially an optical fiber suitable for submarine optical cables. Background technique [0002] In recent years, with the rapid spread of the Internet and the like, the capacity of transmission media for transmitting information has been increased. Among technologies aimed at increasing the transmission capacity, an optical wavelength division multiplexing (hereinafter referred to as WDM) transmission method is expected to be realized at present. However, if the capacity of the WDM transmission system is increased, there is a high possibility that a non-linear effect phenomenon that causes degradation of optical fiber transmission characteristics will occur. Therefore, in recent years, an optical fiber that suppresses the occurrence of the nonlinear effect phenomenon that inevitably occurs in increasing the capacity of the WDM transmission system has been promoted....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/036C03B37/025
CPCC03B37/01446C03B2203/14G02B6/02019G02B6/02357G02B6/02376G02B6/0365
Inventor 大薗和正姚兵小野濑智巳
Owner HITACHI CABLE
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