Topping signal demodulation device and optical module

Abstract

The invention relates to a topping signal demodulation device and an optical module. The topping signal demodulation device comprises a sampling circuit and an amplifying circuit, wherein the samplingcircuit is used for carrying out alternating current coupling on an input RSSI voltage signal to remove a direct current component in the RSSI voltage signal and outputting an alternating current signal; and the amplifying circuit is used for amplifying the input alternating-current signal and outputting the amplified alternating-current signal to the comparator for judgment to recover a modulation signal. The beneficial effects of the device are as follows: an RSSI voltage signal output by a sampling resistor is subjected to alternating-current coupling by adopting the sampling circuit, so that a direct current component on the RSSI signal is removed; the problem that signals are easy to saturate in strong light in a conventional scheme is solved; the amplifying circuit is additionally arranged at the rear end to amplify the input alternating current signals by multiple times (or tens of times), the problem that the signal amplitude is small under weak light (and the signals are notdistorted under strong light) is solved, the dynamic range of the detection circuit can be improved by 10 dB or above, and the dynamic range of signal detection is fully expanded.

Description

technical field [0001] The invention belongs to the technical field of optical communication modules, and in particular relates to a demodulation device and an optical module for a top tuning signal. Background technique [0002] With the rapid development of 5G wireless communication technology, more and more wavelength division multiplexing optical modules are applied to 5G equipment. For example, a 12-wavelength tunable optical module based on dense wavelength division multiplexing (DWDM), or a 20-wavelength tunable optical module; a 12-wavelength optical module based on medium wavelength division multiplexing (MWDM) and a thin wavelength division multiplexing (Lan-WDM) ) 12-wavelength optical module. In order to facilitate the management of multiple-channel WDM optical modules, the "network management" function of the WDM optical module has gradually become "standard configuration": that is, the communication channel established by the multiplexed optical module does no...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems existing in the prior art that the signal easily reaches the upper limit (saturation) of the circuit level under strong light, and the signal amplitude is too small to be easily interfered under weak light, resulting in insufficient dynamic range of signal detection, the present invention provides a top-tuning signal Demodulation device and optical module, which has the characteristics of fully expanding the dynamic range of signal detection

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