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

All-optical control of single-photon wavepackets via Kerr nonlinearity induced refractive index fronts

Surajit Bose, Ihar Babushkin, Stefanus Wijaya, Alì M. Angulo M., Oliver Melchert, Philip Rübeling, Raktim Haldar, Debashri Ghosh, Uwe Morgner, Ayhan Demircan, Michael Kues

Published Jan 1, 2023• 0 citations
Publisher

Abstract

We experimentally demonstrate the efficient, broadband (4.7 THz), and controllable all-optical manipulation of single photons in a nonlinear photonic crystal fiber, in agreement with performed simulations of nonlinear pulse propagation, based on the quantum-classical correspondence principle.
DOI
10.1364/cleo_fs.2023.ftu3b.2

Related papers

Manipulation of Single-Photon Wave Packets Via Kerr-Nonlinear Refractive Index Fronts

Surajit Bose, Alí M. Angulo M., Stefanus Wijaya +8 more

Light manipulation in waveguides has proven to be an important technology in the classical and quantum regimes. The frequency conversion in the quantum domain was proposed to change the photon's frequency distribution without affecting photons statistics [1] and is important for quantum networks, as well as creating superposition in frequency-encoded states [2]. Scalable quantum networks need noiseless conversion. A common approach for noiseless frequency conversion is electro-optical phase-shift-induced sideband creation. However, the magnitude of the frequency shift in this technology is rather restricted, limiting their processing bandwidth to sub-THz levels [2]. This necessitates a thorough design of the nonlinear interaction to utilize a deterministic approach to reshape single photons. Here, we demonstrate the use of Kerr-nonlinear refractive index fronts [3], [4] to optically manipulate the frequency of a single-photon wave packet.

Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)•Jun 26, 2023•2 citations

Broadband Spectral Manipulation of Single Photons Using Cross-Phase Modulation

Kate L. Fenwick, Frédéric Bouchard, Guillaume Thekkadath +3 more

Manipulating the frequency and bandwidth of light is crucial in classical and quantum applications including communication, spectroscopy, imaging, and signal processing. Such capabilities also offer potential for interfacing disparate quantum systems in quantum networking and for quantum information processing. We experimentally demonstrate deterministic, broadband frequency control of heralded telecom-band single photons via cross-phase modulation in a short length of single-mode fiber. An intense, ultrafast pump pulse imposes a transient, intensity-dependent refractive-index gradient which imparts a tunable phase shift on the single photons. We present absolute frequency shifts of up to +6.42±0.06 THz and -5.82±0.02 THz, and bandwidth manipulation ranging from a factor of 0.76±0.03 to 7.1±0.4 times that of the input. Spectral measurements are acquired with a time-of-flight spectrometer and superconducting nanowire detectors. Our scheme offers a compact and scalable route to spectral routing and bandwidth engineering for ultrafast quantum networking and quantum information processing.

arXiv:2508.15886•Physical Review Letters•Jan 7, 2026•3 citations

Simple description of ultrafast single-photon wavepackets interacting with moving fronts

Ihar Babushkin, Surajit Bose, Philip Rübeling +4 more

We consider photons experiencing reflection, tunneling or trapping by refractive index fronts moving at the speed of light. We show that evolution equations in such situations are determined uniquely via the quantum-classical correspondence principle.

•Jan 1, 2023•0 citations

Measurement of the cross-Kerr nonlinearity induced by a single-photon-level coherent pulse in a photonic crystal fiber

Nobuyuki Matsuda, Ryōsuke Shimizu, Yasuyoshi Mitsumori +3 more

We demonstrate the first observation of the cross‐Kerr nonlinearity induced by a single‐photon‐level coherent optical pulse in a photonic crystal fiber. Taking advantage of large nonlinearity and managed dispersion of the optical fiber, we have successfully measured very small (10−7) conditional phase shifts.

AIP conference proceedings•Jan 1, 2009•0 citations

Measurement of optical cross-Kerr nonlinearity induced by a few photons in a photonic crystal fiber

Nobuyuki Matsuda, Ryōsuke Shimizu, Yasuyoshi Mitsumori +2 more

The purpose of our study is to establish the technique to measure such weak cross-Kerr nonlinearity induced by a single photon in solid states. The experimental set-up is based on a pump-probe measurement.

Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)•Jun 1, 2007•0 citations

Modeling of Weak Ultrashort Photonic Wavepackets Using Quantum-Classical Correspondence Principle

Ihar Babushkin, Surajit Bose, Philip Rübeling +4 more

Description of photons as they interact with matter, for instance, during propagation in waveguides, is a complex task, having no satisfactory resolution yet. This is particular the case if one considers interaction of photonic wavepackets with strong pulses, which create moving refractive index steps and thereby can serve as effective mirrors [1] or effective traps [2]. Single and few-photon wavepackets undergo changes in frequency and waveshape as they interact with the strong pulse, providing a novel control tool [1], [2] which accepts ultrashort, even few-cycle, pulses.

Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)•Jun 26, 2023•0 citations
Light manipulation in waveguides has proven to be an important technology in the classical and quantum regimes. The frequency conversion in the quantum domain was proposed to change the photon's frequency distribution without affecting photons statistics [1] and is important for quantum networks, as well as creating superposition in frequency-encoded states [2]. Scalable quantum networks need noiseless conversion. A common approach for noiseless frequency conversion is electro-optical phase-shift-induced sideband creation. However, the magnitude of the frequency shift in this technology is rather restricted, limiting their processing bandwidth to sub-THz levels [2]. This necessitates a thorough design of the nonlinear interaction to utilize a deterministic approach to reshape single photons. Here, we demonstrate the use of Kerr-nonlinear refractive index fronts [3], [4] to optically manipulate the frequency of a single-photon wave packet.
Manipulating the frequency and bandwidth of light is crucial in classical and quantum applications including communication, spectroscopy, imaging, and signal processing. Such capabilities also offer potential for interfacing disparate quantum systems in quantum networking and for quantum information processing. We experimentally demonstrate deterministic, broadband frequency control of heralded telecom-band single photons via cross-phase modulation in a short length of single-mode fiber. An intense, ultrafast pump pulse imposes a transient, intensity-dependent refractive-index gradient which imparts a tunable phase shift on the single photons. We present absolute frequency shifts of up to +6.42±0.06 THz and -5.82±0.02 THz, and bandwidth manipulation ranging from a factor of 0.76±0.03 to 7.1±0.4 times that of the input. Spectral measurements are acquired with a time-of-flight spectrometer and superconducting nanowire detectors. Our scheme offers a compact and scalable route to spectral routing and bandwidth engineering for ultrafast quantum networking and quantum information processing.
Description of photons as they interact with matter, for instance, during propagation in waveguides, is a complex task, having no satisfactory resolution yet. This is particular the case if one considers interaction of photonic wavepackets with strong pulses, which create moving refractive index steps and thereby can serve as effective mirrors [1] or effective traps [2]. Single and few-photon wavepackets undergo changes in frequency and waveshape as they interact with the strong pulse, providing a novel control tool [1], [2] which accepts ultrashort, even few-cycle, pulses.