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Decision level fast detection circuit used in optical burst receiver

A technology of judgment level and detection circuit, which is applied in the field of optoelectronic technology and optical fiber communication, can solve the problem of large power consumption limiting amplifier, etc., and achieve the effect of reducing design requirements

Inactive Publication Date: 2006-03-01
TSINGHUA UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

At the same time, the power-hungry limiting amplifier does not need to be placed in the coaxial package of the photodiode

Method used

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  • Decision level fast detection circuit used in optical burst receiver
  • Decision level fast detection circuit used in optical burst receiver
  • Decision level fast detection circuit used in optical burst receiver

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Embodiment Construction

[0020] The schematic diagram of the burst mode optical receiver is shown in figure 1 . The photodetector PIN-TIA converts the photocurrent into a voltage signal. The output voltage signal is sent to the input terminal of the limiting amplifier LA through the AC coupling capacitor one way, and the other way enters the fast decision level detection circuit proposed by the present invention, and its output is used as the decision level input limiter amplifier LA to perform burst data signal judgment. Among them, PIN-TIA is an improved version of ordinary commercial products. In order to meet the requirements of receiving burst signals, it removes the slow response automatic gain control circuit part and DC depolarization feedback circuit, and the limiting amplifier is also a commercial product. The function of the fast peak detection circuit is to enable the receiving module to quickly establish the decision level within a short period of time after the packet signal arrives, s...

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Abstract

A fast detecting circuit of decision level in light burst receiver is prepared as setting said circuit after series resistance-capacitance formed by AC coupling capacity as well as amplitude limit amplifier equivalent resistance and connected to mutual conductance amplifier output end before post amplitude limit amplifier , using central voltage of series resistance network as decision level value transmitted to post amplitude limit amplifier . The circuit consists of top and bottom edge detection circuits of input burst signal envelope , top and bottom buffers and series resistance network.

Description

Technical field: [0001] The invention belongs to the field of optoelectronic technology and optical fiber communication technology. In particular, it relates to a fast decision level detection technology for signals in an optical burst receiver in a passive optical network. Background technique: [0002] In the optical burst reception of the passive optical network, the length of the optical fiber sent by each sending unit is different, and the performance of each sending unit is also different, and the amplitude and phase of the optical packet entering the receiving unit are very different. Therefore, an optical receiver with a fixed threshold cannot be used, but an optical receiver with a dynamic threshold must be used to adapt to the reception of various optical signals with different amplitudes. Therefore, fast detection of the decision level has become a key technology in the burst mode receiver. [0003] The current relatively mature fast level detection technology i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/158H04B10/66
Inventor 陈明华周玮贾笑冬谢世钟
Owner TSINGHUA UNIV
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