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Optical convolution signal processing system and method based on cascade modulator

A technology of convolution signal and modulator, applied in the field of optical signal processing and optical computing, can solve the problem of large amount of calculation and convolution calculation, and achieve the effect of low delay, strong operability and fast operation speed

Active Publication Date: 2021-10-19
BEIJING INSTITUTE OF TECHNOLOGYGY +1
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Problems solved by technology

[0004] Therefore, there is an urgent need for an optical convolution computing system and corresponding computing method, which can overcome the problem of large amount of computation for computing convolution and reduce the limitation of the size of the hardware system.

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  • Optical convolution signal processing system and method based on cascade modulator
  • Optical convolution signal processing system and method based on cascade modulator
  • Optical convolution signal processing system and method based on cascade modulator

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Embodiment Construction

[0025] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0026] In order to make the implementation and process of the example of the present invention clearer, the implementation of the example of the present invention will be described in more detail below in conjunction with the accompanying drawings.

[0027] Such as figure 1 As shown, the present invention provides an optical convolution signal processing system, which includes: arbitrary waveform generator ①, laser ②, first-level modulator ③, second-level modulator ④, first polarization controller ⑤, The second polarization controller ⑥, the adjustable light delay line ⑦, the photodetector PD ⑧ and the oscilloscope ⑨.

[0028] The first stage modulator ③ is connected to the dimmable delay line ⑦ in one direction, the dimmable delay line ⑦ is connected to the second stage modulator ④ in one direction, and the second stage modulator ④ is connected to the ph...

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Abstract

The invention provides an optical convolution signal processing system and method based on cascaded modulators. According to the invention, cascaded Mach-Zehnder modulators can be utilized to complete multiplication operation between signals in an optical domain, time shift operation is realized by means of an adjustable light delay line between the modulators, then a photoelectric detector is utilized to realize photoelectric conversion, and finally, signal sampling results are accumulated to obtain a convolution result. Compared with a convolution calculation system based on a microelectronic circuit, the system has the advantages of high operation speed, low power consumption and the like; compared with a convolution calculation system based on an integrated photon circuit, the system can perform convolution calculation between signals comprising a large amount of data; and compared with a convolution calculation system based on a wavelength division multiplexing technology, the system is simple in structure and high in operability. According to the invention, the advantage of ultra-high bandwidth of optical signal processing is utilized, the workload of a digital signal processing part is reduced, and the advantages of high speed, large bandwidth and low delay are achieved.

Description

technical field [0001] The invention belongs to the technical field of optical signal processing and optical calculation, and relates to an optical convolution signal processing system and method based on cascaded modulators. Background technique [0002] Convolution calculation is one of the most important operations in the field of signal processing. In speech recognition, image processing, geological exploration, ultrasonic diagnosis and other technical fields, convolution calculation has a very wide range of applications. However, in most applications, the convolution calculation is performed after sampling the signal and using digital signal processing techniques. At present, as the feature size of microelectronic integrated circuits is very close to the physical limit, its performance cannot continue to grow according to Moore's Law. Therefore, computing systems that use electronics as information transmission and processing carriers have bottlenecks in many aspects ...

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Application Information

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IPC IPC(8): H04B10/50H04B10/516
CPCH04B10/505H04B10/516
Inventor 张伟锋张家玮郑爽王彬刘泉华曾涛胡善清
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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