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Device for testing time characteristic of outburst and error rate in outburst optical fiber transmission system

A technology for bit error rate testing and optical fiber transmission, applied in the fields of optoelectronic technology and optical fiber communication

Inactive Publication Date: 2008-02-27
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is far from enough to evaluate its performance only by the eye diagram, especially for the burst optical receiving module
This is because, after passing through the limiting amplifier of the output stage of the optical receiving module, the signal has been judged, even if the eye diagram quality is good, there may be bit errors

Method used

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  • Device for testing time characteristic of outburst and error rate in outburst optical fiber transmission system
  • Device for testing time characteristic of outburst and error rate in outburst optical fiber transmission system
  • Device for testing time characteristic of outburst and error rate in outburst optical fiber transmission system

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Experimental program
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Embodiment Construction

[0042] Fig. 1 is a functional block diagram of the burst time characteristic and bit error rate tester of the burst optical communication system proposed by the present invention. It is divided into five parts: burst signal generating unit, four-channel multiplexing module, burst clock recovery and demultiplexing module, burst signal receiving unit, burst response time and bit error testing unit, among which:

[0043] In the burst mode, there will be bit errors in the first few bytes of data transmission, and this period is the burst response time. In order to transmit data accurately, we must measure this period of time. Here we implement the measurement by counting the number of bit errors during this specific period of time. The frame format of the burst signal designed for specific measurement is as follows:

[0044] (1) burst signal frame

[0045] sync bit

marker bit

ID

Variable length pseudorandom 10B data

redundant part

[0046] ① Synch...

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Abstract

The device includes unit for sending spurt signaling and unit for receiving spurt signaling. The unit for sending spurt signaling is able to generate two routes of spurt signaling interface accorded with EPON (base on Ethernet passive optical network). The receiver for spurt signaling can realize synchronization and reception of input spurt signaling quickly so as to be able to test performance of each optical device in outburst optical transmission system (i.e. up going system), especially to test outburst time characteristic and bit error performance in optical sending and receiving modules operated at outburst mode. The device can operate at continuous mode. The invention is applicable to testing bit error performance in up going transmission channel of passive optical network.

Description

Technical field: [0001] The invention belongs to the field of optoelectronic technology and optical fiber communication technology. In particular, it relates to the measurement of the transmission performance of optical signals in PON (Passive Optical Network). Background technique: [0002] Passive optical network technology is considered to be one of the most potential broadband access solutions. The uplink channel of the passive optical network is a burst optical fiber transmission system, and it is very necessary to test the performance of the system. However, the test equipment is not yet fully mature. The commonly used burst storage oscilloscope is used to test the eye diagram of the burst optical emission module. But it is far from enough to evaluate its performance only by the eye diagram, especially for the burst optical receiving module. This is because, after passing through the limiting amplifier of the output stage of the optical receiving module, the signal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/20H04L12/26
Inventor 陈明华邱辞源石颖谢世钟
Owner TSINGHUA UNIV