Fast, low-loss all-optical phase modulation in warm rubidium vapour

Abstract

Low-loss high-speed switches are an integral component of future photonic quantum technologies, with applications in state generation, multiplexing, and the implementation of quantum gates. Phase modulation is one method of achieving this switching, but existing optical phase modulators either achieve high bandwidth or low loss, but not both. We demonstrate fast ($100\mathrm{MHz}$ bandwidth), low-loss ($83\pm 2\%$ transmission) phase shifting ($\Delta \varphi =(0.90\pm 0.05)\pi$) in a signal field, induced by a control field, and mediated by the two-photon $5S_{1/2}\to 5P_{3/2}\to 5D_{5/2}$ transition in ${}^{87}\text{Rb}$ vapour. We discuss routes to enhance both performance and scalability for application to a range of quantum and classical technologies.

10 pages, 6 figures, this version includes more detailed simulation with collaborators from Imperial College London

References in corpus (24)

• The Quantum Internet
• Optical frequency comb generation from a monolithic microresonator
• Advances in Photonic Quantum Sensing
• Photonic quantum information processing: a concise review
• Integrated spatial multiplexing of heralded single photon sources
• Photon storage in Lambda-type optically dense atomic media. I. Cavity model
• Absolute absorption on the rubidium D lines: comparison between theory and experiment
• Fiber-optical switch controlled by a single atom
• Photonic tensor cores for machine learning
• A practical guide to electromagnetically induced transparency in atomic vapor
• Observation of two-photon absorption at low power levels using tapered optical fibers in rubidium vapor
• Quantum-memory-assisted multi-photon generation for efficient quantum information processing
• Cyclical Quantum Memory for Photonic Qubits
• Fast, noise-free memory for photon synchronization at room temperature
• Achievements and Perspectives of Optical Fiber Fabry-Perot Cavities
• Synchronization of optical photons for quantum information processing
• Coherent suppression of backscattering in optical microresonators
• Theory of noise suppression in Λ-type quantum memories by means of a cavity
• Ladder-type electromagnetically induced transparency using nanofiber-guided light in a warm atomic vapor
• Induced cavities for photonic quantum gates
• High photon-loss threshold quantum computing using GHZ-state measurements
• Spatially resolved spectroscopy of alkali metal vapour diffusing inside hollow-core photonic crystal fibres
• Voigt transmission windows in optically thick atomic vapours: a method to create single-peaked line centre filters
• Low-loss, compact, fibre-integrated cell for quantum memories

Cited by in corpus (1)

• Cavity-based optical switching via phase modulation in warm rubidium vapor