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

Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR)

1000-mode frequency multiplexed singly-resonant photon pairs

Rikizo Ikuta, Ryoya Tani, Masahiro Ishizaki, Shigehito Miki, Masahiro Yabuno, Hirotaka Terai, Nobuyuki Imoto, Takashi Yamamoto

Published Jan 1, 2020• 0 citations
Publisher

Abstract

We demonstrated a frequency-multiplexed photon pair generation over 1000 modes by using a nonlinear optical waveguide inside a cavity which confines only signal photons without confining idler photons and the pump light.
DOI
10.1364/cleopr.2020.c10c_2

Related papers

Singly Resonant Frequency Conversion for Manipulation of a Frequency-Multiplexed Single Photon

Rikizo Ikuta, Masayo Yokota, Toshiki Kobayashi +2 more

Optical frequency conversion is an indispensable technology in modern science and engineering. In particular, recent demand in the field of quantum information processing requires an efficient frequency conversion of a single photon which has quantum information [1], [2] for realizing quantum internet to interconnect various quantum systems. In conventional experiments, such a quantum frequency conversion (QFC) assumes an input of photons at a single frequency mode. However, when we look at frequency-multiplexed quantum communication [3], [4], the QFC will need to accommodate the frequency-multiplexed manner such that it can convert only photons in a target frequency mode from densely frequency-multiplexed input to any desired frequency mode. For this purpose, we construct an optical frequency converter inside a cavity only for the converted mode, which we call optical frequency tweezers [5].

Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)•Jun 26, 2023•0 citations

Frequency-Multiplexed Photon Pairs Over 1000 Modes from a Quadratic Nonlinear Optical Waveguide Resonator with a Singly Resonant Configuration

Rikizo Ikuta, Ryoya Tani, Masahiro Ishizaki +5 more

We demonstrate a frequency multiplexed photon pair generation based on a quadratic nonlinear optical waveguide inside a cavity which confines only signal photons without confining idler photons and the pump light. We monolithically constructed the photon pair generator by a periodically poled lithium niobate (PPLN) waveguide with a high reflective coating for the signal photons around 1600 nm and with antireflective coatings for the idler photons around 1520 nm and the pump light at 780 nm at the end faces of the PPLN waveguide. We observed a comblike photon pair generation with a mode spacing of the free spectral range of the cavity. Unlike the conventional multiple resonant photon pair generation experiments, the photon pair generation was incessant within a range of 80 nm without missing teeth due to a mismatch of the energy conservation and the cavity resonance condition of the photons, resulting in over 1000-mode frequency multiplexed photon pairs in this range.

arXiv:1904.13025•Physical Review Letters•Nov 8, 2019•38 citations

Single-photon frequency comb generation in a giant-atom cavity coupled to a one-dimensional waveguide

Amal Vijayalekshmi Sivakumar, Jiru Liu, M. Suhail Zubairy

Physical Review A•Dec 9, 2025•1 citation

Frequency-multiplexed singly-resonant photon pairs from a quadratic nonlinear optical waveguide resonator

Rikizo Ikuta, Ryoya Tani, Masahiro Ishizaki +5 more

We demonstrate a frequency multiplexed photon pair generation based on a quadratic nonlinear optical waveguide inside a cavity which confines only signal photons without confining idler photons and the pump light. We monolithically constructed the photon pair generator by a periodically-poled lithium niobate (PPLN) waveguide with a high reflective coating for the signal photons around 1600 nm and with anti-refrective coatings for the idler photons around 1520 nm and the pump light at 780 nm at the end faces of the PPLN waveguide. We observed a comb-like photon pair generation with a mode spacing of the free spectral range (FSR) of the cavity. Unlike the conventional multiple resonant photon pair generation experiments, the photon pair generation were incessant within a range of 80 nm without missing teeth due to a mismatch of the energy conservation and the cavity resonance condition of the photons.

•Apr 30, 2019•0 citations

Spectrally Multiplexed Photon Pair Source Using a Programmable Optical Filter

Cody Charles Payne, Markus Allgaier

The rates of photon pairs achievable with single-mode parametric downconversion are inherently limited. Spectral multiplexing using a programmable filter on the pump spectrum can produce more pairs across a palatable multi-mode structure.

Quantum 2.0 Conference and Exhibition•Jan 1, 2025•0 citations

Frequency-Multiplexed Singly-Resonant Photon Pairs from a Quadratic Nonlinear Waveguide Resonator

Rikizo Ikuta, Ryoya Tani, Masahiro Ishizaki +5 more

Frequency multiplexed photon pair generation has been actively studied for efficient and large-scale photonic quantum information processing [1-3]. In these demonstrations, photon pair generators were realized by using an optical parametric oscillator (OPO) far below threshold; a nonlinear optical medium was inside or integrated with an optical cavity, and a sufficiently weak pump light for the photon pair generation was used. However, to the best of our knowledge, all of the previous demonstrations for frequency multiplexed photon pair generation have used a doubly-resonant OPO which confines both the signal and the idler photons, or a triply-resonant OPO which additionally confines the pump light. In this study, we demonstrate a frequency multiplexed photon pair generation based on a singly-resonant (SR) OPO configuration which confines only one half of the photon pair. We used a periodically-poled lithium niobate (PPLN) waveguide as a monolithically-integrated quadratic nonlinear waveguide resonator; dielectric multilayers are directly formed at the end faces of the PPLN waveguide such that only the signal photon around 1600 nm of the photon pair is confined in the resonator and the idler photon around 1522 nm and the pump light at 780 nm are not confined. In the SR photon pair, in spite of no cavity configuration for the idler photons, not only the signal photons but also the idler photons have comb-like spectra as if both of them are confined in the cavity. In addition, there is not missing teeth region observed in multiple resonant OPO configuration known as the cluster effect [4,5]. As a result, a wide-band frequency multiplexed photon pair generation can be possible. The photon pair generator will be useful for an efficient photonic quantum information processing and a frequency-domain photon manipulation with the use of frequency-domain optical elements [6-9].

Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)•Jun 1, 2019•0 citations
Optical frequency conversion is an indispensable technology in modern science and engineering. In particular, recent demand in the field of quantum information processing requires an efficient frequency conversion of a single photon which has quantum information [1], [2] for realizing quantum internet to interconnect various quantum systems. In conventional experiments, such a quantum frequency conversion (QFC) assumes an input of photons at a single frequency mode. However, when we look at frequency-multiplexed quantum communication [3], [4], the QFC will need to accommodate the frequency-multiplexed manner such that it can convert only photons in a target frequency mode from densely frequency-multiplexed input to any desired frequency mode. For this purpose, we construct an optical frequency converter inside a cavity only for the converted mode, which we call optical frequency tweezers [5].
We demonstrate a frequency multiplexed photon pair generation based on a quadratic nonlinear optical waveguide inside a cavity which confines only signal photons without confining idler photons and the pump light. We monolithically constructed the photon pair generator by a periodically poled lithium niobate (PPLN) waveguide with a high reflective coating for the signal photons around 1600 nm and with antireflective coatings for the idler photons around 1520 nm and the pump light at 780 nm at the end faces of the PPLN waveguide. We observed a comblike photon pair generation with a mode spacing of the free spectral range of the cavity. Unlike the conventional multiple resonant photon pair generation experiments, the photon pair generation was incessant within a range of 80 nm without missing teeth due to a mismatch of the energy conservation and the cavity resonance condition of the photons, resulting in over 1000-mode frequency multiplexed photon pairs in this range.
We demonstrate a frequency multiplexed photon pair generation based on a quadratic nonlinear optical waveguide inside a cavity which confines only signal photons without confining idler photons and the pump light. We monolithically constructed the photon pair generator by a periodically-poled lithium niobate (PPLN) waveguide with a high reflective coating for the signal photons around 1600 nm and with anti-refrective coatings for the idler photons around 1520 nm and the pump light at 780 nm at the end faces of the PPLN waveguide. We observed a comb-like photon pair generation with a mode spacing of the free spectral range (FSR) of the cavity. Unlike the conventional multiple resonant photon pair generation experiments, the photon pair generation were incessant within a range of 80 nm without missing teeth due to a mismatch of the energy conservation and the cavity resonance condition of the photons.
Frequency multiplexed photon pair generation has been actively studied for efficient and large-scale photonic quantum information processing [1-3]. In these demonstrations, photon pair generators were realized by using an optical parametric oscillator (OPO) far below threshold; a nonlinear optical medium was inside or integrated with an optical cavity, and a sufficiently weak pump light for the photon pair generation was used. However, to the best of our knowledge, all of the previous demonstrations for frequency multiplexed photon pair generation have used a doubly-resonant OPO which confines both the signal and the idler photons, or a triply-resonant OPO which additionally confines the pump light. In this study, we demonstrate a frequency multiplexed photon pair generation based on a singly-resonant (SR) OPO configuration which confines only one half of the photon pair. We used a periodically-poled lithium niobate (PPLN) waveguide as a monolithically-integrated quadratic nonlinear waveguide resonator; dielectric multilayers are directly formed at the end faces of the PPLN waveguide such that only the signal photon around 1600 nm of the photon pair is confined in the resonator and the idler photon around 1522 nm and the pump light at 780 nm are not confined. In the SR photon pair, in spite of no cavity configuration for the idler photons, not only the signal photons but also the idler photons have comb-like spectra as if both of them are confined in the cavity. In addition, there is not missing teeth region observed in multiple resonant OPO configuration known as the cluster effect [4,5]. As a result, a wide-band frequency multiplexed photon pair generation can be possible. The photon pair generator will be useful for an efficient photonic quantum information processing and a frequency-domain photon manipulation with the use of frequency-domain optical elements [6-9].