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

AIP conference proceedings

The single-mode and two-mode squeezed light generated in ring microresonators: Theoretical limitations and experimental possibilities

Stepan N. Balybin, Andrey Voloshin, Olga V. Tikhonova

Published Jan 1, 2020• 1 citation
Publisher

Abstract

The correlation properties of photon pairs generated in high-Q whispering-gallery mode microresonators in the four wave mixing process are analyzed theoretically. The degree of two-mode squeezing and photon entanglement are investigated depending on different parameters of the pump or microresonator, and the optimal regime for maximum squeezing is found. Various experimental configurations are analyzed, and the most optimal options for compact generation of two-mode squeezed light are found.

DOI
10.1063/5.0011457

Related papers

Squeezing Property of Two-mode Cavity Field in a Nondegenerate Four-wave Mixing System

Wenwu Deng

We apply nondegenerate four-wave mixing processes to the generation of squeezed light and study the evolution of squeezed light with time.We get the master equation of the two-mode field.We also show that the two-mode cavity field exhibits stable squeezing under some conditions.The degree of the squeezing is dependent upon the two photon intensity I2,the cooperativity parameter C and the side-mode detuning.

湖北科技学院学报•Jan 1, 2008•0 citations

Optimization of degenerate four-wave mixing threshold parameters in dual-pumped microresonator

Nadezhda S. Tatarinova, Anatoly Viktorovich Masalov, Artem E. Shitikov +3 more

The numerical and analytical analyses were conducted to determine the optimal parameters of a bichromatically pumped microring resonator system, focusing on the generation process of squeezed light states.

International Conference Laser Optics (ICLO)•Jul 1, 2024•0 citations

Chip-integrated single-mode coherent-squeezed light source using four-wave mixing in microresonators

Patrick Tritschler, Torsten Ohms, Christian Schweikert +7 more

Squeezed light constitutes a key resource for quantum optical technologies including quantum sensing, computing, communication and metrology. For many applications the generation of squeezed light typically requires at least two nonlinear optical stages involving careful phase and frequency matching to achieve the required mixing of squeezed and coherent light. In our work, we introduce an on-chip system that simplifies the generation of coherent-squeezed light, utilizing only a single squeezing stage. We achieve this by pumping a silicon nitride ($\mathrm{Si_3N_4}$) microring resonator to produce single-mode squeezed light through four-wave mixing at the same frequency as the pump mode, leveraging the inherent $χ^{(3)}$-nonlinearity of the $\mathrm{Si_3N_4}$ resonator. Our on-chip system demonstrates a squeezing of -4.7 dB with a clear perspective towards -10 dB squeezing. We also provide a theoretical model that describes the straightforward yet robust generation of single-mode squeezing at the injection locking point of the ring resonator. In fact, we show that a design with a normal dispersion can be used for robust generation of bright squeezed light without the need for careful suppression of unwanted nonlinear processes. Overall, our findings highlight an approach which drastically simplifies the generation of coherent-squeezed light in photonic integrated circuits.

arXiv:2502.16278•Feb 22, 2025•0 citations

The birth, life, and death of squeezed light

Christian Drago

In this thesis we study three aspects of squeezed light. First, we investigate the generation of pulsed, near‑pure, degenerate, single‑temporal‑mode squeezed light produced by dual‑pump spontaneous four wave mixing in integrated silicon‑nitride coupled‑ring resonators. We show that parasitic spontaneous four wave mixing processes inherent to the dual‑pump configuration can substantially degrade the amount of generated squeezing and state purity. To mitigate these effects we explore pump detuning, engineered dispersion, and an auxiliary‑ring structure as suppression strategies. We then optimize the incident pump amplitude and phase, demonstrating that longer pump pulses can yield highly squeezed, temporally separable states and that an appropriate pre‑chirp tracks the effects of self‑ and cross‑phase modulation, increasing intracavity pump amplitudes and the amount of generated squeezing. Next, we analyze the spectral–temporal structure and photon statistics of strongly correlated squeezed light. We develop a general formalism based on the Whittaker–Shannon interpolation of the joint‑temporal amplitude that is particularly useful in the long‑pulse and continuous‑wave limits, where the instantaneous photon density is low but the total photon number may be large. This packet‑based description provides a local, physically transparent account of the state and its photon statistics that complements the Schmidt decomposition, and extends to nonclassical states for which a Schmidt decomposition is not available. Finally, we examine whether or not squeezed illumination can enhance two‑photon excitation relative to classical light, and whether any enhancement is experimentally detectable. We construct a model including radiative and nonradiative broadening to compute scattered and absorbed energy, and apply it to fluorescence from cesium atoms in a magneto‑optical trap driven by classical and squeezed light in both continuous‑wave and pulsed regimes. Under ideal conditions squeezed light can produce a measurable enhancement in both limits, but the gains are moderate and smaller than some recent molecular reports; additional broadening or loss would further reduce detectability.

•Jun 1, 2026•0 citations

Squeezed light from a semiconductor amplifier

Andrey S. Aleksandrov, Anatoly V. Masalov

The possibility of generating light in a squeezed quantum state during saturated light amplification in a semiconductor amplifier is theoretically analyzed. Due to four-wave mixing process during amplification, weak components of the spontaneous emission of the medium with symmetric frequency shifts relative to the strong amplified wave acquire the quantum properties of two-mode squeezed light. The squeezing of quadrature components occurs in the range of frequency shifts of several GHz ($\sim$ the inverse relaxation time of the charge carrier density) and can reach 10 dB or more under optimal conditions. The formation of a two-mode squeezing phase facilitates the observation of the squeezing effect, in which a strong wave, playing the role of a local wave, exhibits quadrature noise suppression without additional homodyne detection.

quant-pharXiv:2610.08005•Oct 7, 2026•0 citations

Experimental Study of Squeezed States Generation Optimal Regimes in Dual-pumped On-chip Microresonators

Alexander K. Vorobyev, Nikolay A. Kapridov, Georgii V. Grechko +4 more

We perform an experimental optimization of squeezed light generation via degenerate optical parametric oscillation process in dual-pumped integrated microresonators. This process is sensitive to the power and frequency detunings of the pumps, and the threshold of this process depends on the spectral interval between pumps.

Quantum 2.0 Conference and Exhibition•Jan 1, 2023•0 citations
The correlation properties of photon pairs generated in high-Q whispering-gallery mode microresonators in the four wave mixing process are analyzed theoretically. The degree of two-mode squeezing and photon entanglement are investigated depending on different parameters of the pump or microresonator, and the optimal regime for maximum squeezing is found. Various experimental configurations are analyzed, and the most optimal options for compact generation of two-mode squeezed light are found.
Squeezed light constitutes a key resource for quantum optical technologies including quantum sensing, computing, communication and metrology. For many applications the generation of squeezed light typically requires at least two nonlinear optical stages involving careful phase and frequency matching to achieve the required mixing of squeezed and coherent light. In our work, we introduce an on-chip system that simplifies the generation of coherent-squeezed light, utilizing only a single squeezing stage. We achieve this by pumping a silicon nitride (Si3N4\mathrm{Si_3N_4}Si3​N4​) microring resonator to produce single-mode squeezed light through four-wave mixing at the same frequency as the pump mode, leveraging the inherent χ(3)χ^{(3)}χ(3)-nonlinearity of the Si3N4\mathrm{Si_3N_4}Si3​N4​ resonator. Our on-chip system demonstrates a squeezing of -4.7 dB with a clear perspective towards -10 dB squeezing. We also provide a theoretical model that describes the straightforward yet robust generation of single-mode squeezing at the injection locking point of the ring resonator. In fact, we show that a design with a normal dispersion can be used for robust generation of bright squeezed light without the need for careful suppression of unwanted nonlinear processes. Overall, our findings highlight an approach which drastically simplifies the generation of coherent-squeezed light in photonic integrated circuits.
In this thesis we study three aspects of squeezed light. First, we investigate the generation of pulsed, near‑pure, degenerate, single‑temporal‑mode squeezed light produced by dual‑pump spontaneous four wave mixing in integrated silicon‑nitride coupled‑ring resonators. We show that parasitic spontaneous four wave mixing processes inherent to the dual‑pump configuration can substantially degrade the amount of generated squeezing and state purity. To mitigate these effects we explore pump detuning, engineered dispersion, and an auxiliary‑ring structure as suppression strategies. We then optimize the incident pump amplitude and phase, demonstrating that longer pump pulses can yield highly squeezed, temporally separable states and that an appropriate pre‑chirp tracks the effects of self‑ and cross‑phase modulation, increasing intracavity pump amplitudes and the amount of generated squeezing. Next, we analyze the spectral–temporal structure and photon statistics of strongly correlated squeezed light. We develop a general formalism based on the Whittaker–Shannon interpolation of the joint‑temporal amplitude that is particularly useful in the long‑pulse and continuous‑wave limits, where the instantaneous photon density is low but the total photon number may be large. This packet‑based description provides a local, physically transparent account of the state and its photon statistics that complements the Schmidt decomposition, and extends to nonclassical states for which a Schmidt decomposition is not available. Finally, we examine whether or not squeezed illumination can enhance two‑photon excitation relative to classical light, and whether any enhancement is experimentally detectable. We construct a model including radiative and nonradiative broadening to compute scattered and absorbed energy, and apply it to fluorescence from cesium atoms in a magneto‑optical trap driven by classical and squeezed light in both continuous‑wave and pulsed regimes. Under ideal conditions squeezed light can produce a measurable enhancement in both limits, but the gains are moderate and smaller than some recent molecular reports; additional broadening or loss would further reduce detectability.
The possibility of generating light in a squeezed quantum state during saturated light amplification in a semiconductor amplifier is theoretically analyzed. Due to four-wave mixing process during amplification, weak components of the spontaneous emission of the medium with symmetric frequency shifts relative to the strong amplified wave acquire the quantum properties of two-mode squeezed light. The squeezing of quadrature components occurs in the range of frequency shifts of several GHz (∼\sim∼ the inverse relaxation time of the charge carrier density) and can reach 10 dB or more under optimal conditions. The formation of a two-mode squeezing phase facilitates the observation of the squeezing effect, in which a strong wave, playing the role of a local wave, exhibits quadrature noise suppression without additional homodyne detection.