an epon system

An all-in-one, optical transceiver technology, applied in the field of EPON systems, can solve problems that hinder the implementation of EPON networks, equipment heat damage, increase system burden, etc., to achieve the effect of increasing the longest transmission distance, reducing costs, and increasing coverage

Active Publication Date: 2020-05-08
宏安集团有限公司
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Problems solved by technology

At present, in optical fiber transmission, the downlink optical signal wavelengths are commonly used in the 1490nm and 1550nm segments, and the attenuation speed of the optical signal in the optical fiber is inversely proportional to the wavelength of the optical signal, that is to say, the shorter the wavelength, the faster the attenuation, so the optical signal The farthest transmission distance is determined by the optical signal in the 1490nm segment; and if the overall optical power of the mixed optical signal is increased, it will increase the burden on the system and easily cause heat damage to the device
This requires the laying of more OLT equipment, and the cost is high, which hinders the implementation of EPON network

Method used

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Embodiment

[0027] refer to Figure 1 ~ Figure 4 As shown, the present invention discloses a kind of EPON system, including OLT optical transceiver and several ONU8, OLT optical transceiver includes OLT module 6, optical transceiver module 7, optical splitter 9, optical amplifier 10 and wavelength division multiplexer 11.

[0028] The above-mentioned OLT module 6 is set at the optical fiber trunk terminal, which sends Ethernet data in a broadcast mode for the ONU8, initiates and controls the ranging process, records the ranging information and allocates bandwidth for the ONU8, that is, controls the starting time and sending time of the data sent by the ONU8 window size.

[0029] The optical splitter 9 is connected to the OLT module 6 for signals, and it includes an anisotropic transparent crystal, which is used to separate the downstream optical signals of the 1490nm segment and the 1550nm segment. Anisotropic transparent crystals can be calcite or quartz.

[0030] Both the optical amp...

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Abstract

The invention discloses an EPON system comprising an OLT optical transceiver located on an optical fiber trunk terminal and an ONU located on a client, wherein the OLT optical transceiver comprises anOLT module for allocating a bandwidth to the ONU, a light splitter for splitting downlink optical signals with different wavelengths, a wavelength division multiplexer for multiplexing the optical signals with different wavelengths and an optical transceiver module for collecting and allocating the optical signals, which are connected in sequence, an optical amplifier for amplifying the optical power is connected between the optical splitter and the wavelength division multiplexer, and the optical transceiver module is in signal connection with the ONU. The integration level and the coverageof OLT equipment can be increased under a small system load, thereby reducing the pavement cost and the maintenance cost.

Description

technical field [0001] The invention relates to a PON network, in particular to an EPON system. Background technique [0002] EPON (Ethernet-based Passive Optical Network) is a kind of PON network. With the development of telecommunication technology, it is an integrated access technology widely used to meet the needs of high-speed broadband services such as video and data. EPON network consists of three parts: OLT, ODN and ONU. The main features are point-to-multipoint, passive line, simple and clear network hierarchy, and can provide comprehensive access to multiple services such as voice, broadband, and CATV. At present, in optical fiber transmission, the downlink optical signal wavelengths are commonly used in the 1490nm and 1550nm segments, and the attenuation speed of the optical signal in the optical fiber is inversely proportional to the wavelength of the optical signal, that is to say, the shorter the wavelength, the faster the attenuation, so the optical signal T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04Q11/00
CPCH04Q11/0067
Inventor 陈卫东张桂林张洪雷刘蒙范雨侬丛晓红王英力崔孝富于文双杨成福
Owner 宏安集团有限公司
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