177 citations · 765 across the 22 of their papers we have counts for
22 papers
Interfacing picosecond and nanosecond quantum light pulses
Filip Sośnicki, Michał Mikołajczyk, Ali Golestani +1
Light is a key information carrier, enabling worldwide high-speed data transmission through a telecommunication fibre network. This information-carrying capacity can be extended to…
Pure Single Photons from Scalable Frequency Multiplexing
T. Hiemstra, T. F. Parker, P. C. Humphreys +7
We demonstrate multiphoton interference using a resource-efficient frequency multiplexing scheme, suitable for quantum information applications that demand multiple indistinguishab…
Large-scale spectral bandwidth compression by complex electro-optic temporal phase modulation
Filip Sosnicki, Michal Karpinski
Spectral-temporal shaping of quantum light has important applications in quantum communications and photonic quantum information processing. Electro-optic temporal lenses have rece…
Optimal interfacing a GHz-bandwidth heralded single photon source with on-demand, broadband quantum memories
Patrick Steffen Michelberger, Michal Karpinski, Ian Alexander Walmsley +1
Photonics offers a route to fast and distributed quantum computing in ambient conditions, provided that photon sources and logic gates can be operated deterministically. Quantum me…
Measuring the single-photon temporal-spectral wave function
Alex O. C. Davis, Valérian Thiel, Michał Karpiński +1
Temporal-spectral modes of light provide a fundamental window into the nature of atomic and molecular systems and offer robust means for information encoding. Methods to precisely…
Measurement of radio-frequency temporal phase modulation using spectral interferometry
Michał Jachura, Jan Szczepanek, Wojciech Wasilewski +1
We present an optical method to measure radio-frequency electro-optic phase modulation profiles by employing spectrum-to-time mapping realized by highly chirped optical pulses. We…
Pulsed single-photon spectrometer by frequency-to-time mapping using chirped fiber Bragg gratings
Alex O. C. Davis, Paul M. Saulnier, Michal Karpinski +1
A fiber-integrated spectrometer for single-photon pulses outside the telecommunications wavelength range based upon frequency-to-time mapping, implemented by chromatic group delay…
Spectral shearing of quantum light pulses by electro-optic phase modulation
Laura J. Wright, Michal Karpinski, Christoph Soeller +1
Frequency conversion of non-classical light enables robust encoding of quantum information based upon spectral multiplexing that is particularly well-suited to integrated-optics pl…
Bandwidth manipulation of quantum light by an electro-optic time lens
Michal Karpinski, Michal Jachura, Laura J. Wright +1
The ability to manipulate the spectral-temporal waveform of optical pulses has enabled a wide range of applications from ultrafast spectroscopy to high-speed communications. Extend…
Scheme for on-chip verification of transverse mode entanglement using the electro-optic effect
Divya Bharadwaj, K. Thyagarajan, Michał Jachura +2
A key ingredient in emerging quantum-enhanced technologies is the ability to coherently manipulate and detect superpositions of basis states. In integrated optics implementations,…
Geneartion of higher dimensional modal entanglement using a three waveguide directional coupler
Divya Bharadwaj, K. Thyagarajan, Michal Karpinski +1
In this paper, we propose a method for the generation of higher dimensional modal entanglement through type II spontaneous parametric down conversion process using a three waveguid…
Characterization of conditional state-engineering quantum processes by coherent state quantum process tomography
Merlin Cooper, Eirion Slade, Michal Karpinski +1
Conditional quantum optical processes enable a wide range of technologies from generation of highly non-classical states to implementation of quantum logic operations. The process…
High-visibility nonclassical interference of photon pairs generated in a multimode nonlinear waveguide
Michał Jachura, Michał Karpiński, Czesław Radzewicz +1
We report measurements of two-photon interference using a cw-pumped type-II spontaneous parametric down-conversion source based on a multimode perodically poled potassium titanyl p…
Quantum mechanical which-way experiment with an internal degree of freedom
Konrad Banaszek, Pawel Horodecki, Michal Karpinski +1
For a particle travelling through an interferometer, the trade-off between the available which-way information and the interference visibility provides a lucid manifestation of the…
Quantum state estimation with unknown measurements
Merlin Cooper, Michal Karpinski, Brian J. Smith
Improved measurement techniques are central to technological development and foundational scientific exploration. Quantum optics relies upon detectors sensitive to non-classical fe…
Generation of spatially pure photon pairs in a multimode nonlinear waveguide using intermodal dispersion
Michal Karpinski, Czeslaw Radzewicz, Konrad Banaszek
We present experimental realization of type-II spontaneous parametric down-conversion in a periodically poled potassium titanyl phosphate (KTiOPO4) nonlinear waveguide. We demonstr…
Experimental generation of complex noisy photonic entanglement
K. Dobek, M. Karpinski, R. Demkowicz-Dobrzanski +2
We present an experimental scheme based on spontaneous parametric down-conversion to produce multiple photon pairs in maximally entangled polarization states using an arrangement o…
Dispersion-based control of modal characteristics for parametric down-conversion in a multimode waveguide
Michal Karpinski, Czeslaw Radzewicz, Konrad Banaszek
We report generation of near-infrared photon pairs in fundamental spatial modes via type-II spontaneous parametric down-conversion in a periodically poled potassium titanyl phospha…
Experimental Extraction of Secure Correlations from a Noisy Private State
Krzysztof Dobek, Michal Karpinski, Rafal Demkowicz-Dobrzanski +2
We report experimental generation of a noisy entangled four-photon state that exhibits a separation between the secure key contents and distillable entanglement, a hallmark feature…
Quantum and semiclassical polarization correlations
Konrad Banaszek, Rafal Demkowicz-Dobrzanski, Michal Karpinski +2
We analyze the strength of polarization correlations between two light beams that can be achieved in the semiclassical regime using statistical mixtures of coherent states and bina…
Experimental characterization of three-wave mixing in a multimode nonlinear KTiOPO_4 waveguide
Michal Karpinski, Czeslaw Radzewicz, Konrad Banaszek
We report experimental determination of the phase-matching function for type-II three-wave mixing in a periodically poled KTiOPO_4 waveguide in the 792-815 nm spectral region. The…
Fiber-optic realization of anisotropic depolarizing quantum channels
Michal Karpinski, Czeslaw Radzewicz, Konrad Banaszek
We employed an electrically-driven polarization controller to implement anisotropic depolarizing quantum channels for the polarization state of single photons. The channels were ch…