Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Electronics Letters

Optically preamplified receiver with lowquantum limit

Idelfonso Tafur Monroy

Published Jul 8, 1999• 6 citations
Publisher

Abstract

An optically preamplified receiver configuration resulting in a very low quantum limit is presented. Optical amplifiers are proven to efficiently enhance the receiver sensitivity of optical communication systems. We present an optically preamplified OOK/DD receiver scheme with a very low quantum limit, which is predicted to outperform previously studied configurations

DOI
10.1049/el:19990828

Related papers

Ultralow-noise preamplified optical receiver using conventional single-wavelength transmission

Rasmus Larsson, Ruwan U. Weerasuriya, Peter A. Andrekson

Conventional optical amplifiers that use stimulated emission suffer from the generation of excess noise, thus limiting the performance in many applications. The phase-sensitive optical parametric amplifier, relying on the use of a nonlinear material for amplification, is an exception that can approach a noise figure of 0 dB. Its implementation in optical communication links has, however, been cumbersome due to increased complexity both in the transmitter and the receiver, effectively limiting the use of such amplifiers in practice. Here, we propose and demonstrate an implementation of a transmission system with exceptional performance in terms of receiver sensitivity (0.9 photons per bit) using a standalone ultralow-noise phase-sensitively preamplified receiver and a conventional single-wave optical transmitter. This is a significant simplification compared to previous demonstrations and can transform such amplifiers from a curiosity to practical use for example in deep-space-to-earth communication links.

Optica•Oct 3, 2024•8 citations

Quantum Receiver for Phase-Shift Keying at the Single-Photon Level

Jasminder S. Sidhu, Shuro Izumi, Jonas Schou Neergaard-Nielsen +2 more

Quantum enhanced receivers are endowed with resources to achieve higher sensitivities than conventional technologies. For application in optical communications, they provide improved discriminatory capabilities for multiple nonorthogonal quantum states. In this work, we propose and experimentally demonstrate a new decoding scheme for quadrature phase-shift encoded signals. Our receiver surpasses the standard quantum limit and outperforms all previously known nonadaptive detectors at low input powers. Unlike existing approaches, the receiver only exploits linear optical elements and on-off photodetection. This circumvents the requirement for challenging feed-forward operations that limit communication transmission rates and can be readily implemented with current technology.

•Jan 1, 2021•15 citations

Quantum Receiver for Phase-Shift Keying at the Single-Photon Level

Jasminder S. Sidhu, Shuro Izumi, Jonas Schou Neergaard-Nielsen +2 more

Quantum enhanced receivers are endowed with resources to achieve higher sensitivities than conventional technologies.For application in optical communications, they provide improved discriminatory capabilities for multiple nonorthogonal quantum states.In this work, we propose and experimentally demonstrate a new decoding scheme for quadrature phase-shift encoded signals.Our receiver surpasses the standard quantum limit and outperforms all previously known nonadaptive detectors at low input powers.Unlike existing approaches, the receiver only exploits linear optical elements and on-off photodetection.This circumvents the requirement for challenging feed-forward operations that limit communication transmission rates and can be readily implemented with current technology.

arXiv:2009.03339•PRX Quantum•Feb 26, 2021•20 citations

Quantum receiver for phase-shift keying at the single photon level

Jasminder S. Sidhu, Shuro Izumi, Jonas Schou Neergaard-Nielsen +2 more

Quantum enhanced receivers are endowed with resources to achieve higher sensitivities than conventional technologies. For application in optical communications, they provide improved discriminatory capabilities for multiple non-orthogonal quantum states. In this work, we propose and experimentally demonstrate a new decoding scheme for quadrature phase-shift encoded signals. Our receiver surpasses the standard quantum limit and outperforms all previously known non-adaptive detectors at low input powers. Unlike existing approaches, the receiver only exploits linear optical elements and on-off photo-detection. This circumvents the requirement for challenging feed-forward operations that limit communication transmission rates and can be readily implemented with current technology.

Quantum Technology: Driving Commercialisation of an Enabling Science•Oct 6, 2021•0 citations

Quantum Receiver beyond the Standard Quantum Limit of Coherent Optical Communication

Kenji Tsujino, Daiji Fukuda, Go Fujii +4 more

The most efficient modern optical communication is known as coherent communication, and its standard quantum limit is almost reachable with current technology. Though it has been predicted for a long time that this standard quantum limit could be overcome via quantum mechanically optimized receivers, such a performance has not been experimentally realized so far. Here we demonstrate the first unconditional evidence surpassing the standard quantum limit of coherent optical communication. We implement a quantum receiver with a simple linear optics configuration and achieve more than 90% of the total detection efficiency of the system. Such an efficient quantum receiver will provide a new way of extending the distance of amplification-free channels, as well as of realizing quantum information protocols based on coherent states and the loophole-free test of quantum mechanics.

arXiv:1103.5592•Physical Review Letters•Jun 24, 2011•116 citations

Quantum receiver for quadrature phase-shift keying at the single photon level

Jasminder S. Sidhu, Shuro Izumi, Jonas Schou Neergaard-Nielsen +2 more

Quantum enhanced receivers are endowed with resources to achieve higher sensitivities than conventional technologies. For application in optical communications, they provide improved discriminatory capabilities for multiple non-orthogonal quantum states. In this work, we propose and experimentally demonstrate a new decoding scheme for quadrature phase-shift encoded signals. Our receiver surpasses the standard quantum limit and outperforms all previously known non-adaptive detectors at low input powers. Unlike existing approaches, our receiver only exploits auxiliary coherent-state fields, linear optics, and on-off photo-detection. This circumvents the requirement for challenging feed-forward operations that limit communication transmission rates and can be readily implemented with current technology.

•Sep 7, 2020•1 citation
An optically preamplified receiver configuration resulting in a very low quantum limit is presented. Optical amplifiers are proven to efficiently enhance the receiver sensitivity of optical communication systems. We present an optically preamplified OOK/DD receiver scheme with a very low quantum limit, which is predicted to outperform previously studied configurations
Conventional optical amplifiers that use stimulated emission suffer from the generation of excess noise, thus limiting the performance in many applications. The phase-sensitive optical parametric amplifier, relying on the use of a nonlinear material for amplification, is an exception that can approach a noise figure of 0 dB. Its implementation in optical communication links has, however, been cumbersome due to increased complexity both in the transmitter and the receiver, effectively limiting the use of such amplifiers in practice. Here, we propose and demonstrate an implementation of a transmission system with exceptional performance in terms of receiver sensitivity (0.9 photons per bit) using a standalone ultralow-noise phase-sensitively preamplified receiver and a conventional single-wave optical transmitter. This is a significant simplification compared to previous demonstrations and can transform such amplifiers from a curiosity to practical use for example in deep-space-to-earth communication links.
Quantum enhanced receivers are endowed with resources to achieve higher sensitivities than conventional technologies. For application in optical communications, they provide improved discriminatory capabilities for multiple nonorthogonal quantum states. In this work, we propose and experimentally demonstrate a new decoding scheme for quadrature phase-shift encoded signals. Our receiver surpasses the standard quantum limit and outperforms all previously known nonadaptive detectors at low input powers. Unlike existing approaches, the receiver only exploits linear optical elements and on-off photodetection. This circumvents the requirement for challenging feed-forward operations that limit communication transmission rates and can be readily implemented with current technology.
Quantum enhanced receivers are endowed with resources to achieve higher sensitivities than conventional technologies.For application in optical communications, they provide improved discriminatory capabilities for multiple nonorthogonal quantum states.In this work, we propose and experimentally demonstrate a new decoding scheme for quadrature phase-shift encoded signals.Our receiver surpasses the standard quantum limit and outperforms all previously known nonadaptive detectors at low input powers.Unlike existing approaches, the receiver only exploits linear optical elements and on-off photodetection.This circumvents the requirement for challenging feed-forward operations that limit communication transmission rates and can be readily implemented with current technology.
Quantum enhanced receivers are endowed with resources to achieve higher sensitivities than conventional technologies. For application in optical communications, they provide improved discriminatory capabilities for multiple non-orthogonal quantum states. In this work, we propose and experimentally demonstrate a new decoding scheme for quadrature phase-shift encoded signals. Our receiver surpasses the standard quantum limit and outperforms all previously known non-adaptive detectors at low input powers. Unlike existing approaches, the receiver only exploits linear optical elements and on-off photo-detection. This circumvents the requirement for challenging feed-forward operations that limit communication transmission rates and can be readily implemented with current technology.
The most efficient modern optical communication is known as coherent communication, and its standard quantum limit is almost reachable with current technology. Though it has been predicted for a long time that this standard quantum limit could be overcome via quantum mechanically optimized receivers, such a performance has not been experimentally realized so far. Here we demonstrate the first unconditional evidence surpassing the standard quantum limit of coherent optical communication. We implement a quantum receiver with a simple linear optics configuration and achieve more than 90% of the total detection efficiency of the system. Such an efficient quantum receiver will provide a new way of extending the distance of amplification-free channels, as well as of realizing quantum information protocols based on coherent states and the loophole-free test of quantum mechanics.
Quantum enhanced receivers are endowed with resources to achieve higher sensitivities than conventional technologies. For application in optical communications, they provide improved discriminatory capabilities for multiple non-orthogonal quantum states. In this work, we propose and experimentally demonstrate a new decoding scheme for quadrature phase-shift encoded signals. Our receiver surpasses the standard quantum limit and outperforms all previously known non-adaptive detectors at low input powers. Unlike existing approaches, our receiver only exploits auxiliary coherent-state fields, linear optics, and on-off photo-detection. This circumvents the requirement for challenging feed-forward operations that limit communication transmission rates and can be readily implemented with current technology.