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Optical module receiving circuit and optical module

A receiving circuit and optical module technology, which is applied in the field of optical communication, can solve the problems of affecting signal sensitivity, large receiving circuit crosstalk, and large printed board space, so as to improve signal receiving sensitivity, reduce crosstalk, and reduce complexity.

Inactive Publication Date: 2017-10-10
HISENSE BROADBAND MULTIMEDIA TECH
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  • Application Information

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Problems solved by technology

[0004] However, the receiving circuit of the above optical module uses independent 10G LA and 1G LA for signal amplification, and needs to cooperate with the matching circuit of LA, resulting in a complicated circuit structure and a large space on the printed board. Therefore, the two receiving circuits are usually set The distance between the two receiving circuits is relatively short, resulting in large crosstalk between the two receiving circuits, which affects the sensitivity of signal reception

Method used

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  • Optical module receiving circuit and optical module
  • Optical module receiving circuit and optical module
  • Optical module receiving circuit and optical module

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[0016] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with aspects of the invention as recited in the appended claims.

[0017] Since the receiving end of the OLT optical module uses burst receiving, the receiving establishment time is particularly important. If the reception setup time is long, it will have a great impact on the sensitivity, and may even cause the burst reception to fail to work normally. According to the requirements of the IEEE Std802.3av protocol, the establishment time of 1.25Gbit / s burst re...

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Abstract

The invention discloses an optical module receiving circuit and an optical module. Particularly, 10G and 1G signals share the same limiting amplifier, and after optical signals of 10.3125 Gbps and 1.2448 Gbps are converted into electric signals through an APD photoelectric converter, constant-amplitude amplification electrical signal output is obtained through a trans-impedance amplifier and a 10 G limiting amplifier in sequence, wherein signals entering a 1G signal receiving pin are converted into an electric signal conforming to a 1G logic level interface through a level converter. According to the characteristics that the receiving circuit of a symmetrical 10G EPON OLT optical module works in the mode of division multiplexing in use, and the 10G receiving limiting amplifier can meet the work speed of 1-11 Gbps, the 10G limiting amplifier capable of being compatible with two rate signals can be adopted for amplifying the 1G and 10G signals from a trans-impedance amplifier, one 1G limiting amplifier and matching circuits surrounding the 1G limiting amplifier can be saved, the complexity of the circuits is reduced, and then interference among the circuits can be reduced so as to improve the signal receiving sensitivity.

Description

technical field [0001] The invention relates to the technical field of optical communication, in particular to an optical module receiving circuit and an optical module. Background technique [0002] 10G EPON (Ethernet Passive Optical Network, Ethernet Passive Optical Network) symmetrical OLT (optical line terminal, optical line terminal) optical module, as a smooth upgrade of 1G EPON and 10G EPON asymmetrical OLT optical module, has become the field of optical access network The most popular technology, it can not only increase the existing bandwidth, but also increase the uplink and downlink rates to 10.3125Gbit / s, which greatly meets the user's demand for bandwidth, and also takes into account 1G and 10G services, compatible with EPON networking, unified and smooth network management The upgrade is highly favored by operators, and it also greatly reduces the investment and development costs of operators. [0003] Specifically, the 10G EPON symmetrical OLT optical module ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/69
CPCH04B10/693H04B10/697
Inventor 金成浩
Owner HISENSE BROADBAND MULTIMEDIA TECH
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