{"title":"Low-coherence light enhances photonic computing","authors":"Giampaolo Pitruzzello","doi":"10.1038/s41566-024-01536-6","DOIUrl":null,"url":null,"abstract":"<p>Now, writing in <i>Nature</i>, Dong, Brückerhoff-Plückelmann and colleagues demonstrate that low-coherence light can, somewhat counterintuitively, be employed for photonic convolutional computing, and even enhance it (B. Dong et al. <i>Nature</i> <b>632</b>, 55–62; 2024).</p><p>The low-coherence light, produced by filtering the emission from an erbium-doped fibre amplifier, is evenly split by amplitude between <i>N</i> input channels, with each channel's amplitude modulated to form the <i>N</i>-element input vector (see picture). This input vector is then sent into a chip with weighting elements to perform matrix calculations. On the other hand, a coherent system requires wavelength multiplexing, demanding <i>N</i> separate optical bands to achieve the same <i>N</i>-element vector while avoiding unwanted interference. Thus, the incoherent approach increases parallelization, as <i>N</i> times more operations can be performed simultaneously within a single frequency band compared to a coherent system.</p>","PeriodicalId":18926,"journal":{"name":"Nature Photonics","volume":null,"pages":null},"PeriodicalIF":32.3000,"publicationDate":"2024-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Nature Photonics","FirstCategoryId":"101","ListUrlMain":"https://doi.org/10.1038/s41566-024-01536-6","RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"OPTICS","Score":null,"Total":0}
引用次数: 0
Abstract
Now, writing in Nature, Dong, Brückerhoff-Plückelmann and colleagues demonstrate that low-coherence light can, somewhat counterintuitively, be employed for photonic convolutional computing, and even enhance it (B. Dong et al. Nature632, 55–62; 2024).
The low-coherence light, produced by filtering the emission from an erbium-doped fibre amplifier, is evenly split by amplitude between N input channels, with each channel's amplitude modulated to form the N-element input vector (see picture). This input vector is then sent into a chip with weighting elements to perform matrix calculations. On the other hand, a coherent system requires wavelength multiplexing, demanding N separate optical bands to achieve the same N-element vector while avoiding unwanted interference. Thus, the incoherent approach increases parallelization, as N times more operations can be performed simultaneously within a single frequency band compared to a coherent system.
现在,Dong、Brückerhoff-Plückelmann 及其同事在《自然》杂志上发表文章,证明低相干光可以用于光子卷积计算,甚至可以增强计算能力(B. Dong et al.然后,该输入矢量被送入带有加权元素的芯片,进行矩阵计算。另一方面,相干系统需要波长多路复用,需要 N 个独立的光带来实现相同的 N 元素矢量,同时避免不必要的干扰。因此,非相干方法提高了并行化程度,因为与相干系统相比,在单个频带内可同时执行的操作多 N 倍。
期刊介绍:
Nature Photonics is a monthly journal dedicated to the scientific study and application of light, known as Photonics. It publishes top-quality, peer-reviewed research across all areas of light generation, manipulation, and detection.
The journal encompasses research into the fundamental properties of light and its interactions with matter, as well as the latest developments in optoelectronic devices and emerging photonics applications. Topics covered include lasers, LEDs, imaging, detectors, optoelectronic devices, quantum optics, biophotonics, optical data storage, spectroscopy, fiber optics, solar energy, displays, terahertz technology, nonlinear optics, plasmonics, nanophotonics, and X-rays.
In addition to research papers and review articles summarizing scientific findings in optoelectronics, Nature Photonics also features News and Views pieces and research highlights. It uniquely includes articles on the business aspects of the industry, such as technology commercialization and market analysis, offering a comprehensive perspective on the field.