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

Quantum-Enhanced Phase Detection in a Lithium Niobate Photonic Integrated Circuit

Hubert S. Stokowski, Timothy P. McKenna, Tae‐Won Park, Alexander Y. Hwang, Devin J. Dean, Oguz Tolga Celik, Vahid Ansari, M. M. Fejer, Amir H. Safavi‐Naeini

Published Jan 1, 2023• 0 citations
Publisher

Abstract

Squeezed light promises improved optical measurement sensitivity. We present a photonic integrated circuit with an embedded squeezed light source. It achieves 4% SNR improvement over shot-noise and paves the way toward deployable quantum optical sensors.
DOI
10.1364/cleo_fs.2023.ff2l.3

Related papers

Integrated quantum optical phase sensor in thin film lithium niobate

Hubert S. Stokowski, Timothy P. McKenna, Tae‐Won Park +6 more

Abstract The quantum noise of light, attributed to the random arrival time of photons from a coherent light source, fundamentally limits optical phase sensors. An engineered source of squeezed states suppresses this noise and allows phase detection sensitivity beyond the quantum noise limit (QNL). We need ways to use quantum light within deployable quantum sensors. Here we present a photonic integrated circuit in thin-film lithium niobate that meets these requirements. We use the second-order nonlinearity to produce a squeezed state at the same frequency as the pump light and realize circuit control and sensing with electro-optics. Using 26.2 milliwatts of optical power, we measure (2.7 ± 0.2)% squeezing and apply it to increase the signal-to-noise ratio of phase measurement. We anticipate that photonic systems like this, which operate with low power and integrate all of the needed functionality on a single die, will open new opportunities for quantum optical sensing.

arXiv:2212.09717•Nature Communications•Jun 8, 2023•96 citations

Demonstration of a squeezed light source on thin-film lithium niobate with modal phase matching

Tummas Napoleon Arge, Seongmin Jo, Huy Quang Nguyen +8 more

Squeezed states are essential for continuous-variable (CV) quantum information processing, with wide-ranging applications in computing, sensing, and communications. Integrated photonic circuits provide a scalable, convenient platform for building large CV circuits. Thin-film lithium niobate (TFLN) is particularly promising due to its low propagation loss, efficient parametric down conversion, and fast electro-optical modulation. In this work, we demonstrate a squeezed light source on an integrated TFLN platform, achieving a measured shot noise reduction of 0.46 dB (1.5 dB on-chip) using modal phase matching and grating couplers with an efficiency of up to −2.2 dB. The achieved squeezing is comparable to what has been observed using more complex circuitry based on periodic poling. The simpler design allows for compact, efficient, and reproducible sources of squeezed light.

Optica Quantum•Aug 14, 2025•8 citations

Demonstration of a Squeezed Light Source on Thin-Film Lithium Niobate with Modal Phase Matching

Tummas Napoleon Arge, Seongmin Jo, Huy Quang Nguyen +8 more

Squeezed states are essential for continuous variable (CV) quantum information processing, with wide-ranging applications in computing, sensing and communications. Integrated photonic circuits provide a scalable, convenient platform for building large CV circuits. Thin-film Lithium Niobate (TFLN) is particularly promising due to its low propagation loss, efficient parametric down conversion, and fast electro-optical modulation. In this work, we demonstrate a squeezed light source on an integrated TFLN platform, achieving a measured shot noise reduction of 0.46 dB using modal phase matching and grating couplers with an efficiency of up to -2.2 dB. The achieved squeezing is comparable to what has been observed using more complex circuitry based on periodic poling. The simpler design allows for compact, efficient and reproducible sources of squeezed light.

arXiv:2406.16516•Jun 24, 2024•4 citations

Demonstration of a Squeezed Light Source on Thin-Film Lithium Niobate Without Periodic Poling

Tummas Napoleon Arge, Seongmin Jo, Huy Quang Nguyen +6 more

Squeezed quantum states are the fundamental building block for continuous-variable quantum computing. We demonstrate a squeezed light source on an integrated LNOI platform with a shot noise reduction of 0.5 dB without periodic poling.

Quantum 2.0 Conference and Exhibition•Jan 1, 2024•0 citations

Squeezed light generation and analysis using a sub-threshold optical parametric oscillator on integrated thin-film lithium niobate photonic circuit

Tae‐Won Park, Hubert S. Stokowski, Timothy P. McKenna +7 more

We present our recent effort towards building an integrated photonic circuitry on thin-film lithium niobate platform for squeezed state of light generation from an optical parametric oscillator.

•Jan 1, 2023•0 citations

Chip-Based Compact Squeezing Experiment at a Telecom Wavelength

François Mondain, Tommaso Lunghi, Alessandro Zavatta +5 more

In the context of quantum communication and technologies squeezed states of light represent a crucial resource. Nevertheless, their generation and detection usually demand complex bulk systems, hardly compatible with out-of-the-laboratory realizations. In view of future practical applications, we present a compact and easy-to-use set-up exploiting the association of commercial plug-and-play fibre components and integrated optics on lithium niobate for the generation and detection of squeezed light at a telecom wavelength. Squeezed light exhibits a reduced quantum noise of -2.00 ± 0.05 dB below the shot-noise level in a single-pass configuration.

International Conference on Transparent Optical Networks•Jul 1, 2019•0 citations
Abstract The quantum noise of light, attributed to the random arrival time of photons from a coherent light source, fundamentally limits optical phase sensors. An engineered source of squeezed states suppresses this noise and allows phase detection sensitivity beyond the quantum noise limit (QNL). We need ways to use quantum light within deployable quantum sensors. Here we present a photonic integrated circuit in thin-film lithium niobate that meets these requirements. We use the second-order nonlinearity to produce a squeezed state at the same frequency as the pump light and realize circuit control and sensing with electro-optics. Using 26.2 milliwatts of optical power, we measure (2.7 ± 0.2)% squeezing and apply it to increase the signal-to-noise ratio of phase measurement. We anticipate that photonic systems like this, which operate with low power and integrate all of the needed functionality on a single die, will open new opportunities for quantum optical sensing.
Squeezed states are essential for continuous-variable (CV) quantum information processing, with wide-ranging applications in computing, sensing, and communications. Integrated photonic circuits provide a scalable, convenient platform for building large CV circuits. Thin-film lithium niobate (TFLN) is particularly promising due to its low propagation loss, efficient parametric down conversion, and fast electro-optical modulation. In this work, we demonstrate a squeezed light source on an integrated TFLN platform, achieving a measured shot noise reduction of 0.46 dB (1.5 dB on-chip) using modal phase matching and grating couplers with an efficiency of up to −2.2 dB. The achieved squeezing is comparable to what has been observed using more complex circuitry based on periodic poling. The simpler design allows for compact, efficient, and reproducible sources of squeezed light.
Squeezed states are essential for continuous variable (CV) quantum information processing, with wide-ranging applications in computing, sensing and communications. Integrated photonic circuits provide a scalable, convenient platform for building large CV circuits. Thin-film Lithium Niobate (TFLN) is particularly promising due to its low propagation loss, efficient parametric down conversion, and fast electro-optical modulation. In this work, we demonstrate a squeezed light source on an integrated TFLN platform, achieving a measured shot noise reduction of 0.46 dB using modal phase matching and grating couplers with an efficiency of up to -2.2 dB. The achieved squeezing is comparable to what has been observed using more complex circuitry based on periodic poling. The simpler design allows for compact, efficient and reproducible sources of squeezed light.
In the context of quantum communication and technologies squeezed states of light represent a crucial resource. Nevertheless, their generation and detection usually demand complex bulk systems, hardly compatible with out-of-the-laboratory realizations. In view of future practical applications, we present a compact and easy-to-use set-up exploiting the association of commercial plug-and-play fibre components and integrated optics on lithium niobate for the generation and detection of squeezed light at a telecom wavelength. Squeezed light exhibits a reduced quantum noise of -2.00 ± 0.05 dB below the shot-noise level in a single-pass configuration.