{"title":"Random Bit Generation in VCSEL with Delayed Optoelectronic Feedback","authors":"A. A. Krents, E. A. Yarunova, N. E. Molevich","doi":"10.3103/S1060992X25601964","DOIUrl":null,"url":null,"abstract":"<p>This paper presents a method for generating random bits using a semiconductor laser with optoelectronic feedback, which induces chaotic dynamics. Numerical simulations of the system equations, incorporating the alpha factor and time delay, revealed that for τ > 2.5 ns, the system transitions to a chaotic regime, confirmed by a continuous intensity spectrum. For bit generation, the chaotic signal was sampled at 40 GHz, followed by 8-bit quantization and extraction of the 4 least significant bits. The resulting sequence of bits successfully passed all 15 NIST SP 800-22 tests, including frequency, entropy, and correlation assessments. The implemented scheme demonstrates a generation rate of up to 160 Gbit/s, highlighting its potential for high-performance security systems.</p>","PeriodicalId":721,"journal":{"name":"Optical Memory and Neural Networks","volume":"34 3","pages":"S478 - S484"},"PeriodicalIF":0.9000,"publicationDate":"2026-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Optical Memory and Neural Networks","FirstCategoryId":"1085","ListUrlMain":"https://link.springer.com/article/10.3103/S1060992X25601964","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"OPTICS","Score":null,"Total":0}
引用次数: 0
Abstract
This paper presents a method for generating random bits using a semiconductor laser with optoelectronic feedback, which induces chaotic dynamics. Numerical simulations of the system equations, incorporating the alpha factor and time delay, revealed that for τ > 2.5 ns, the system transitions to a chaotic regime, confirmed by a continuous intensity spectrum. For bit generation, the chaotic signal was sampled at 40 GHz, followed by 8-bit quantization and extraction of the 4 least significant bits. The resulting sequence of bits successfully passed all 15 NIST SP 800-22 tests, including frequency, entropy, and correlation assessments. The implemented scheme demonstrates a generation rate of up to 160 Gbit/s, highlighting its potential for high-performance security systems.
期刊介绍：
The journal covers a wide range of issues in information optics such as optical memory, mechanisms for optical data recording and processing, photosensitive materials, optical, optoelectronic and holographic nanostructures, and many other related topics. Papers on memory systems using holographic and biological structures and concepts of brain operation are also included. The journal pays particular attention to research in the field of neural net systems that may lead to a new generation of computional technologies by endowing them with intelligence.
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