A method for monitoring parameters of an optical IQ modulator

Abstract

The invention discloses a method and device for monitoring parameters of an optical IQ modulator, and relates to the field of optical IQ modulators. The method includes: collecting a complex signal modulated by the optical IQ modulator and outputting it; converting the collected complex signal into a trajectory constellation Figure: Input the signal trajectory constellation diagram into the trained deep convolutional neural network, read the mapping relationship between the time difference of the transmitting end and the amplitude ratio output by the deep convolutional neural network, and adjust the parameters of the optical IQ modulator according to the mapping relationship. The optical IQ modulator parameter monitoring method and device of the present invention adopt the method of homodyne detection to ensure that the lengths of the signal optical path and the light source optical path are equal, thereby eliminating the influence brought by the phase noise of the laser, and avoiding the use of two lasers in the existing method. , it is necessary to use digital signal processing to eliminate the inconvenience of the above-mentioned phase noise influence.

Description

Technical field [0001] The present invention relates to the field of light IQ modulators, and more particularly to a light IQ modulator parameter monitoring method and apparatus. Background technique [0002] As the demand for traffic is increasing in the optical fiber communication network, the fiber optic communication system based on coherence technology has received more and more extensive attention. In an optical fiber communication system based on coherent light technology, the dual polarization IQ modulator is one of the key devices that achieve amplitude and phase mapping, which is loaded into two polarized states (solid) and Q road (imaginary) The consistency of the electrical signal will seriously affect the performance of the coherent light communication system. The consistency of the double polarized light IQ modulator is mainly manifested in a single polarization state, and the amplitude and delay of the Q road signal are consistent, and the amplitude and delay betwe...

AI Technical Summary

Problems solved by technology

[0005] (1) It takes a long time, because there are many variables (various deviations in the above process) that need to be adjusted, and it takes a long time to adjust to the best effect;

[0006] (2) In the integrated coherent optical receiving module, in order to calculate the quality factor, it is necessary to cooperate with professional bit error meter equipment, and the electrical signal format it can handle is limited by the bit error meter; at the same time, complex digital signal processing steps are required. increases the complexity of the system

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