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Home NEWS Science News

Developing smarter, faster machine intelligence with light

Bioengineer by Bioengineer
December 18, 2020
in Science News
Reading Time: 3 mins read
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Researchers invent an optical convolutional neural network accelerator for machine learning

IMAGE

Credit: Volker Sorger/GWU

SUMMARY

Researchers at the George Washington University, together with researchers at the University of California, Los Angeles, and the deep-tech venture startup Optelligence LLC, have developed an optical convolutional neural network accelerator capable of processing large amounts of information, on the order of petabytes, per second. This innovation, which harnesses the massive parallelism of light, heralds a new era of optical signal processing for machine learning with numerous applications, including in self-driving cars, 5G networks, data-centers, biomedical diagnostics, data-security and more.

THE SITUATION

Global demand for machine learning hardware is dramatically outpacing current computing power supplies. State-of-the-art electronic hardware, such as graphics processing units and tensor processing unit accelerators, help mitigate this, but are intrinsically challenged by serial data processing that requires iterative data processing and encounters delays from wiring and circuit constraints. Optical alternatives to electronic hardware could help speed up machine learning processes by simplifying the way information is processed in a non-iterative way. However, photonic-based machine learning is typically limited by the number of components that can be placed on photonic integrated circuits, limiting the interconnectivity, while free-space spatial-light-modulators are restricted to slow programming speeds.

THE SOLUTION

To achieve a breakthrough in this optical machine learning system, the researchers replaced spatial light modulators with digital mirror-based technology, thus developing a system over 100 times faster. The non-iterative timing of this processor, in combination with rapid programmability and massive parallelization, enables this optical machine learning system to outperform even the top-of-the-line graphics processing units by over one order of magnitude, with room for further optimization beyond the initial prototype.

Unlike the current paradigm in electronic machine learning hardware that processes information sequentially, this processor uses the Fourier optics, a concept of frequency filtering which allows for performing the required convolutions of the neural network as much simpler element-wise multiplications using the digital mirror technology.

FROM THE RESEARCHERS

“This massively parallel amplitude-only Fourier optical processor is heralding a new era for information processing and machine learning. We show that training this neural network can account for the lack of phase information.”

-Volker Sorger, associate professor of electrical and computer engineering at the George Washington University.

“Optics allows for processing large-scale matrices in a single time-step, which allows for new scaling vectors of performing convolutions optically. This can have significant potential for machine learning applications as demonstrated here.”

-Puneet Gupta, professor & vice chair of computer engineering at UCLA

“This prototype demonstration shows a commercial path for optical accelerators ready for a number of applications like network-edge processing, data-centers and high-performance compute systems.”

-Hamed Dalir, Co-founder, Optelligence LLC

###

PUBLICATION INFORMATION

The paper, “Massively Parallel Amplitude-Only Fourier Neural Network” was published today in the journal OPTICA. To schedule an interview with Dr. Sorger, please contact Timothy Pierce at [email protected].

This technology is covered by several patent applications and is available for licensing (US Patent App. 63/061,487).

Media Contact
Timothy Pierce
[email protected]

Original Source

https://mediarelations.gwu.edu/developing-smarter-faster-machine-intelligence-light

Related Journal Article

http://dx.doi.org/10.1364/OPTICA.408659

Tags: Computer ScienceElectrical Engineering/ElectronicsInternetRobotry/Artificial IntelligenceTechnology/Engineering/Computer Science
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