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Optical fibre

An optical fiber and optical signal technology, applied in the field of optical communication, can solve problems such as time-consuming, and achieve the effect of reducing processing steps and facilitating loss calculation

Active Publication Date: 2020-04-21
BRITISH TELECOMM PLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this requires measures to be taken at both the distribution point and the customer premises and can be time consuming (especially if the distribution point is far from the customer premises)

Method used

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  • Optical fibre
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Embodiment Construction

[0031] Such as Figure 4As shown, according to an embodiment, distribution point 102 is connected to customer premises 120 via drop fiber 422 along which a plurality of distributed Bragg reflectors (i.e., fiber Bragg gratings (FBG) ) 424 such that when the fiber is cut to length, the grating 424 will be within a specified maximum distance of the cut end 420. To facilitate cleaving the fiber at a suitable location (e.g., within the preferred distance of the FBGs) between adjacent FBGs, while avoiding cleaving to one of the FBGs, the location of each of the multiple FBGs along the fiber is externally determined. Marking (eg, on the outside of the fiber or on the outside of the cable containing the fiber). This provides a way to ensure that a suitable optical reflector is within a predetermined distance of the tip end 420 of the drop fiber even if the drop fiber is cut to length in the field and the final length of the drop fiber is not known in advance. effective method. The ...

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PUM

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Abstract

An optical fibre comprising a plurality of embedded optical reflectors distributed periodically along the length of the fibre and a method of quantifying loss associated with an optical connector thatis connected to optical fibre comprising a plurality of embedded optical reflectors distributed periodically along the length of the fibre. The method comprises: inserting an optical signal into thefibre through the optical connector; measuring a component of the optical signal reflected by at least one of the plurality of embedded optical reflectors, in which the component is received through the optical connector; calculating the difference in power level between the inserted and reflected signals; and quantifying, based on the calculated power level difference and the reflectivity of theembedded optical reflector, the loss associated with the optical connector.

Description

technical field [0001] The present invention relates generally to optical communications, and to an optical fiber for improved loss measurement. Background technique [0002] Fiber-to-the-premises (FTTP) provides fiber optics from the switch or switching center all the way to the customer premises. At the customer end of the optical fiber, which is typically cut to length at the customer premises, optical connectors are required to terminate the optical fiber in order to facilitate connection into customer premises equipment. The need to quickly connect customer premises equipment has led to the introduction of field-fit connectors, which involve a mechanical method of placing the connector on the freshly cleaved end of an optical fiber. As the name implies, the connectors are field-installed, so the quality assurance of the connection is questionable when compared to, for example, optical components made in a manufacturing plant. Field-installable connectors (also known a...

Claims

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Application Information

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IPC IPC(8): G01M11/00
CPCG01M11/31G02B6/02076G02B6/385
Inventor N·帕金M·坎贝尔
Owner BRITISH TELECOMM PLC