Optical module receiving circuit, optical module and communication device

Abstract

The invention provides an optical module receiving circuit, an optical module and a communication device. The optical module receiving circuit comprises: a photoelectric conversion unit, a switching rate unit and an amplitude limiting control unit, which are connected with each other in sequence. The photoelectric conversion unit is used for receiving optical signals of different rates and converting the optical signals into voltage signals. The switching rate unit is used for receiving a control signal from a microprocessor, selecting a target transmission channel according to the control signal, and sending a voltage signal to the amplitude limiting control unit through the target transmission channel, wherein the control signal is used for indicating a timing sequence between voltage signals of different rates. The amplitude limiting control unit is used for amplifying the voltage signal and sending the amplified voltage signal to the microprocessor. The optical module receiving circuit provided by the invention takes into account the transmission process of high rate signals and low rate signals.

Description

technical field [0001] The invention relates to the technical field of optical fiber communication, in particular to an optical module receiving circuit, an optical module and communication equipment. Background technique [0002] 10-Gigabit-capable symmetric passive optical network (10-Gigabit-capable symmetric passive optical network, XGSPON) optical line terminal (optical line terminal, OLT) optical module (referred to as optical module) can operate at a high rate of 9.953Gb / ps and a low rate of 2.488Gb Switch between large and small bandwidths between / ps, which greatly meets the user's bandwidth requirements, and achieves dual-rate optical signals, making the sensitivity of the optical module to receive optical signals optimal. [0003] At present, the receiving circuit of the optical module in the optical module needs to be compatible with components under the dual rate of 9.953Gb / ps and 2.488Gb / ps, and realize the time domain selection of the dual rate of 9.953Gb / ps a...

AI Technical Summary

Problems solved by technology

[0004] However, the existing optical module receiving circuit cannot take into account the downlink reception of high-rate signals and low-rate signals at the same time, and most of the components in the existing optical module receiving circuit are 10G components, which are easy to introduce too much high-frequency noise and reduce the cost of components. The signal-to-noise ratio of the device makes the sensitivity performance of the existing optical module receiving circuit to receive 2.488Gb / ps data unable to meet the industry requirements

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