Apparatus and method for processing optical signals

Abstract

Embodiments of the present invention provide an apparatus and method for processing an optical signal, including: an optical beam splitter, configured to perform beam splitting processing on the optical signal to obtain multiple optical components; an optical delay unit, configured to split the optical signal The multiple light components obtained by the beam splitting processing of the beam device are subjected to delay processing; the mode division multiplexer is used to perform mode conversion on the multiple light components obtained by the delay processing of the optical delay unit to obtain multiple light components, wherein , the guided wave modes corresponding to any two of the multiple light components obtained through mode conversion are different; the mode division multiplexer is also used to superimpose the multiple light components obtained through mode conversion to obtain an optical superposition signal; The photodetector is used to convert the optical superposition signal obtained by superimposing the mode division multiplexer into a current signal. In the embodiment of the present invention, the superposition of multiple light components in the light domain can be realized, and the number of photodetectors can be reduced.

Description

technical field [0001] Embodiments of the present invention relate to the field of optical communications, and more specifically, to an apparatus and method for processing optical signals. Background technique [0002] In an optical communication system, the distortion or damage of an optical signal may reduce the error-free working tolerance of the system, thereby affecting the normal operation of the system. In the prior art, a feed-forward equalizer (Feed-Forward Equalizer, FFE) can be used to compensate or equalize the optical signal, as follows figure 1 The FFE in the above is taken as an example to briefly introduce the process of compensating or equalizing optical signals in the prior art. Such as figure 1 As shown, the FFE is composed of a grating coupler, a delay unit, an optical beam splitter and a double input photodetector (Double Input Photo Diode, DIPD). The process of processing the optical signal by the FEE will be described in detail below. [0003] The ...

AI Technical Summary

Problems solved by technology

However, this equalizer firstly performs delay processing on each light component, and then converts each light component into a current signal before superimposing. It can be seen that this equalizer cannot realize the superposition of each light component in the optical domain, but needs It is only by converting each light component into a current signal that they can be superimposed. Therefore, when the number of light components is large, the number of high-speed photodetectors required is also relatively large. The structure of the equalizer is more complicated, such as the chip design of the optical waveguide and high-speed photodetector will be more complicated; on the other hand, connecting multiple high-speed photodetectors in parallel will reduce the overall electrical bandwidth of the equalizer, which is not conducive to the processing of optical signals

Images