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Method and device for improving sensitivity of burst optical receiver

A technology of receiver sensitivity and preamplifier, which is applied in the field of optical communication, can solve the problem that the receiver cannot respond quickly to DC level changes, etc., and achieve the effect of meeting the requirements of technology and market development, increasing processing time, and increasing capacitance

Active Publication Date: 2015-08-05
CHENGDU SUPERXON COMM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The biggest advantage of using AC coupling is that there is no trouble of signal offset and reset between packets; the disadvantage is: due to the large attenuation of the low-frequency component of the signal, the long-connected "1" and long-connected "0" signals are attenuated, and the receiver Sensitivity cost, a trade-off between sensitivity cost and level recovery time
At this time, due to the charge and discharge time of the large capacitor, the receiver cannot respond quickly to the DC level change in the burst packet

Method used

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  • Method and device for improving sensitivity of burst optical receiver
  • Method and device for improving sensitivity of burst optical receiver
  • Method and device for improving sensitivity of burst optical receiver

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Embodiment Construction

[0028] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation methods.

[0029] The main idea of ​​the technical solution of the present invention is to provide more processing time for the burst signal in the burst optical receiver to recover data by extending the effective time length of the reset signal, thereby increasing the dynamics of the burst optical receiver. receiving range. Moreover, the prolongation of the effective time length of the reset signal can also enable the circuit designer to select better parameters when selecting devices for the signal recovery circuit, thereby further improving the performance of the burst receiver such as sensitivity. By using this solution, the working performance of the burst receiver can be significantly improved with low cost.

[0030] figure 2It is a schematic diagram of the circuit structure of the optical burst recei...

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Abstract

The invention discloses a method and a device for improving the sensitivity of a burst light receiver. A reset signal processing circuit is used for prolonging a reset signal and inputting the prolonged reset signal to a signal recovery circuit, and the signal recovery circuit recovers a common mode voltage difference in a differential circuit according to the prolonged reset signal. The effective time width of the reset signal is expanded to prolong the processing time of the burst signal recovery circuit in the receiver, thereby increasing the capacitance value of a coupling capacitor in an AC coupling scheme and further improving the sensitivity of burst light reception.

Description

technical field [0001] The present invention relates to the technical field of optical communication, in particular to a processing technology for an office equipment (OLT) in a gigabit passive optical network (GPON) to receive a burst uplink optical signal. Background technique [0002] In recent years, people's demand for voice, data and video services has grown rapidly. They hope that "three networks in one" can enter the home, and the requirements for the transmission bandwidth of Internet services are also getting higher and higher. Passive optical networks are characterized by transparent services, The advantages of long service life, almost unlimited bandwidth carrying capacity, and ability to adapt to growing bandwidth and new service development requirements have naturally become an inevitable trend in the development of access layer networks. [0003] Gigabit passive optical network (GPON) technology is the latest generation broadband passive optical network access...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/66H04B10/69
Inventor 徐元
Owner CHENGDU SUPERXON COMM TECH CO LTD