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Multi-port automatic fault detection system for single-fiber three-way multiplexer

A fault detection, single-fiber three-way technology, applied in the direction of transmission monitoring/testing/fault measurement system, transmission system, fault recovery arrangement, etc., can solve problems such as poor reliability, lack of dynamic adjustment of detection optical signal threshold, etc., to achieve favorable Write, reduce the probability of misjudgment, and expand the effect of detection range

Active Publication Date: 2012-02-01
ZHEJIANG FUCHUNJIANG PHOTOELECTRIC SCI & TECH
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Problems solved by technology

[0006] In order to overcome the lack of dynamic adjustment of the detection optical signal threshold and poor reliability of the existing multi-port automatic fault detection system for single-fiber three-way multiplexers, the present invention provides a dynamic adjustment detection optical signal threshold, reliable A multi-port automatic fault detection system with good performance for single-fiber three-way multiplexer

Method used

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  • Multi-port automatic fault detection system for single-fiber three-way multiplexer

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example 1

[0042] Example 1: if Figure 6 As shown, for some common communities or office buildings, fiber-to-the-building (FTTB) technology is a low-cost access network solution to increase access bandwidth. Generally speaking, for a building, a single-fiber three-way multiplexer can be configured, and the downstream of the single-fiber three-way multiplexer can use local area network technologies such as Fast Ethernet or wireless LAN to access users. In this case, the single-fiber three-way multiplexer can be placed in the distribution box outside the building or in a dedicated computer room, and a 95:5 (or 90:10) optical beam splitter is installed on each of the four ports . The multi-port automatic fault detection system obtains sampled optical signals through these 4 optical beam splitters, and detects the working status of these 4 ports in real time. Since the space of the distribution box or the dedicated computer room is relatively sufficient, in the FTTB application environmen...

example 2

[0043] Example 2: if Figure 7 As shown, for some high-end communities or business centers, fiber-to-the-home (FTTH) technology is an effective access network solution to provide the best network bandwidth. In this case, each home or office can be equipped with a single-fiber three-way multiplexer, and the single-fiber three-way multiplexer is directly connected to the user terminal equipment. In order to reduce the placement space of the equipment, in the application environment of FTTH, an integrated optical beam splitter is generally used together with a multi-port automatic fault detection system.

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Abstract

The invention relates to a multi-port automatic fault detection system for a single-fiber three-way multiplexer, which comprises a weak light detection circuit, a signal conditioning part and a single-chip microcomputer control part, wherein the weak light detection circuit is used for extracting light signals accessed to four ports in a set proportion under the cooperation of a light beam splitter and converting the extracted weak light signals into weak current signals; the signal conditioning part is used for converting the weak current signals produced by the weak light detection circuit into weak voltage signals and comparing the weak voltage signals after voltage amplification with a preset light signal detection threshold to obtain corresponding digital logics; and the single-chip microcomputer control part is used for obtaining the operating states of the four ports through the digital logics produced by the signal conditioning part. The multi-port automatic fault detection system for the single-fiber three-way multiplexer has the advantages that the light signal threshold can be dynamically adjusted and detected and the reliability is good.

Description

technical field [0001] The invention belongs to the technical field of optical fiber access networks, in particular to a multi-port automatic monitoring system for a single-fiber three-way multiplexer in the fiber-to-the-home (FTTH) or fiber-to-the-building (FTTB) access network. Background technique [0002] As the pace of the Chinese government's promotion of "triple play" continues to accelerate, fiber-to-the-home (FTTH) technology or fiber-to-the-building (FTTB) technology has gradually become the most competitive access to achieve the goal of "triple play". web technology. [0003] The single-fiber three-way multiplexer (Triplexer) is one of the core devices in the practical application of FTTH technology, and its main function is to complete the coupling and wavelength division multiplexing of optical signals. EPON and GPON technical standards ITU-TG.983 and G.984 regulate the single-fiber three-way multiplexer using three-wavelength allocation schemes of 1310nm, 1490...

Claims

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Application Information

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IPC IPC(8): H04B10/08H04B10/03H04B10/07
Inventor 付明磊乐孜纯费霞
Owner ZHEJIANG FUCHUNJIANG PHOTOELECTRIC SCI & TECH
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