Optical signal processing device and method

Abstract

The embodiment of the invention provides an optical signal processing device and method, and the device comprises a light beam splitter which is used for carrying out the beam splitting of an optical signal, so as to obtain a plurality of optical components; an optical time delay unit which is used for carrying out the time delay processing of the plurality of optical components obtained through the light beam splitter; a mode multiplexer which is used for carrying out the mode conversion of the plurality of optical components processed through the optical time delay unit, so as to obtain a plurality of optical components, wherein the waveguide modes corresponding to any two of the obtained optical components after mode conversion are different, and the mode multiplexer is also used for superposing of the plurality of optical components obtained through mode conversion, and obtaining an optical superposed signal; and a photoelectric detector which is used for converting the optical superposed signal obtained through the mode multiplexer after superposing into a current signal. According to the embodiment of the invention, the device can carry out the superposing of the plurality of optical components in a light domain, and reduce the number of photoelectric detectors.

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. like 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 opt...

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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

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