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NTT Succeeds at Frequency Stabilization of an Electro-Optic Modulation-Based Optical Frequency Comb

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화요일, 8월 15, 2023
Science, Other Energy, Other Science, Utilities, Research, Energy, Technology, Other Technology, Hertz, Nobel Prize, Communication, GPS, CW, Linus Sandgren, Signal-to-noise ratio, Tokyo Denki University, International Telecommunication Union, Light, FS, Multimedia, Pulse, Ministry, Fiber, Laser, Lithium niobate, OFC, Scientific Reports, Nippon Telegraph and Telephone, PPLN, Culture, NTT, Microwave, Nobel Prize in Physics, SHG, News, Calibration, Mobile phone, Electronics, Cable television, Printed circuit board, Synthetic oil, Transformer, Telescope, Medical imaging, Fused quartz, Sport, Frequency, Physics, EO, Education

An optical frequency comb (OFC) [1] is an optical signal that has a comb-like emission line spectrum on the frequency axis and is used for optical frequency measurement and precise frequency conversion from light to microwave.

Key Points: 
  • An optical frequency comb (OFC) [1] is an optical signal that has a comb-like emission line spectrum on the frequency axis and is used for optical frequency measurement and precise frequency conversion from light to microwave.
  • On the other hand, as the EO comb moves away from the seed light source on the frequency axis, microwave noise is superimposed and the frequency becomes unstable, so the frequency must be stabilized.
  • NTT and Tokyo Denki University have been researching technology to stabilize the frequency of EO comb [8].
  • Applications of optical frequency measurement:
    As a stabilized EO comb application, NTT focused on absolute optical frequency measurement technology and determined the optical frequency fs of the seed light source.

NTT: Realization of Modularized Quantum Light Source Toward Fault-tolerant Large-scale Universal Optical Quantum Computers

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목요일, 12월 23, 2021
Other Manufacturing, Research, Technology, Telecommunications, Manufacturing, Networks, Hardware, University, Science, Education, Osaka University, Nippon Telegraph and Telephone, Quantum, Mechanics, Technology, Program, NTT, Applied Physics Letters, Vacuum, RIKEN, Percussion section, Photon, Temperature, Graduate school, Terahertz, Method, Industry, University, Achievement, Electron, Noise, Light, Research, JST, PPLN, Element, Virginia Information Technologies Agency, Project, Fig, Physics, Japan Science and Technology Agency, Multimedia, University of Tokyo, Parity, Fiber, Programmer, Microscope, Engineering

To realize optical quantum computers, one of the most important components is a quantum light source generating squeezed light, which is the origin of quantum nature in optical quantum computers.

Key Points: 
  • To realize optical quantum computers, one of the most important components is a quantum light source generating squeezed light, which is the origin of quantum nature in optical quantum computers.
  • To achieve a large-scale universal fault-tolerant optical quantum computer, we need a fiber-coupled squeezed light source with highly squeezed quantum noise and photon number parity that is maintained even in high-photon-number components.
  • In this study, we have developed a new optical fiber-coupled quantum light source that operates at optical communication wavelengths.
  • In addition, we will improve the quantum noise squeezing ability of the quantum light source to realize a fault-tolerant large-scale universal optical quantum computer.