Light IQ modulator parameter monitoring method and device

Abstract

The invention discloses a light IQ modulator parameter monitoring method and device and relates to the field of a light IQ modulator. The method comprises the steps of collecting plural signals outputthrough modulation of the light IQ modulator; converting the collected plural signals into a track constellation diagram; and inputting the signal track constellation diagram into a trained deep convolutional neural network, reading a mapping relationship between transmitting end time differences and amplitude ratios, and adjusting light IQ modulator parameters according to the mapping relationship, wherein the mapping relationship is output by the deep convolutional neural network. According to the light IQ modulator parameter monitoring method and device provided by the invention, a zero difference detection mode is employed, a signal light path and a light source path are guaranteed to be equal in length, and further influence resulting from laser phase noises is eliminated, and inconvenience that two lasers are employed in an existing method and the influence resulting from the phase noises needs to be eliminated in a digital signal processing mode is avoided.

Description

technical field [0001] The invention relates to the field of optical IQ modulators, in particular to a method and device for monitoring parameters of an optical IQ modulator. Background technique [0002] With the increasing demand for traffic in optical fiber communication networks, optical fiber communication systems based on coherent technology have gained more and more attention. In the optical fiber communication system based on coherent optical technology, the dual-polarization IQ modulator is one of the key devices to realize amplitude and phase mapping, which is loaded on the I path (real part) and Q path (imaginary part) of the two polarization states The consistency of electrical signals can seriously affect the performance of coherent optical communication systems. The consistency of the dual-polarized IQ modulator is mainly manifested in the consistency of the amplitude and delay of the I-channel and Q-channel signals on a single polarization state, and the cons...

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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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