EOSPACE (United States)

Quantum correlated states of light, such as squeezed states, are a fundamental resource for the development of quantum technologies, as they are needed for applications in quantum metrology, quantum computation, and quantum communications. It is thus critical to develop compact, efficient, and robust sources to generate such states. Here, we report on a compact, narrowband, fiber-coupled source of two-mode squeezed states of light at 795 nm based on four-wave mixing (FWM) in an 85Rb atomic vapor. The source is designed in a small modular form factor, with two input fiber-coupled beams, the seed and pump beams required for the FWM, and two output fibers, one for each of the modes of the squeezed state. The system is optimized for low pump power (135 mW) to achieve a maximum intensity-difference squeezing of 4.4 dB after the output of fibers at an analysis frequency of 1 MHz. The narrowband nature of the source makes it ideal for atomic-based quantum sensing and quantum networking configurations that rely on atomic quantum memories. Such a source paves the way for a versatile and portable platform for applications in quantum information science.

We present the first microwave analog optical link to achieve a noise figure (NF) below 10 dB. A link gain of up to ~6dB and common-mode noise rejection achieved via a dual-output Mach-Zehnder intensity modulator and differential detection enable us to achieve link NFs as low as ~7.5 dB in the range of ~2-6.5 GHz

PreviousNext No AccessSymposium on the Application of Geophysics to Engineering and Environmental Problems 1990Application of Seismic Refraction Survey to Investigation for Tunnel ConstructionAuthors: Naomichi YokoyaTakashi KanemoriNaomichi YokoyaOYO corporation, 2‐19 Daitakubo 2‐chome, Urawa, Saitama 336, Japan and Takashi KanemoriOYO GEOSPACE corporation, 7334 N.Gessner Rd., Houston, Texas 77040https://doi.org/10.4133/1.2921879 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Abstract Introductory paragraph for this paper is available only in the PDF and GZipped PS filesPermalink: https://doi.org/10.4133/1.2921879FiguresReferencesRelatedDetails Symposium on the Application of Geophysics to Engineering and Environmental Problems 1990ISSN (online):1554-8015Copyright: 1990 Pages: 365 publication data© 1990 Copyright © 1990 The Environmental and Engineering Geophysical SocietyPublisher:Environmental & Engineering Geophysical Society HistoryPublished Online: 30 Sep 2008 CITATION INFORMATION Naomichi Yokoya and Takashi Kanemori, (1990), "Application of Seismic Refraction Survey to Investigation for Tunnel Construction," Symposium on the Application of Geophysics to Engineering and Environmental Problems Proceedings : 205-221. https://doi.org/10.4133/1.2921879 Plain-Language Summary PDF DownloadLoading ...