Quantum Photonics Laboratory (QPL)

Quantum Photonics Laboratory (QPL)

Team leader

Research topics

We explore the spectral-temporal properties of single photon pulses and their use as quantum information carriers. We combine methods of quantum optics, femtosecond pulse and nonlinear optics, temporal Fourier optics, electro-optics and high-frequency electronics to experimentally investigate coherent modification of spectral-temporal mode structure of quantum light. We explore photonic time-energy entanglement. Our results lead to photonic interfaces for quantum internet, quantum gates for time-frequency encoding and efficient quantum cryptography protocols.

We are a young dynamic group within the Optics Division of the Faculty of Physics (FUW) at the University of Warsaw (UW). FUW is a world-class research centre covering a broad area of physics and is the leading physics research institution in Poland. It hosts numerous groups both in optics (Ultrafast Phenomena Lab, Quantum Memories Lab, Photonic Nanostructures Facility, Information Optics Lab, Cold Atoms, Femtosecond Spectroscopy) as well as quantum information, quantum metrology and communications theory. This gives us an ideal setting for our research. We work in a state-of the art optical lab furnished with cutting-edge equipment, including low timing jitter supercoducting single-photon-counting detectors. We appreciate the support of Konrad Banaszek, Czesław Radzewicz and numerous funding programmmes (EU Structural Funds, National Science Centre of Poland). Our current funding includes a grant from the National Science Centre of Poland and a project funded by the Foundation for Polish Science Homing programme (project website).

Research group website

Spectral-temporal engineering of quantum light

We research the potential of spectral-temporal encoding for processing of quantum information. Our interests include experimental implementations of multidimensional quantum-enhanced metrology. We explore highly efficient, fibre-compatible quantum cryptography protocols. We look for applications of time-energy entanglement.

Photonic interfaces for quantum networks

We experimentally investigate methods for coherent modification of spectro-temporal mode structure of optical pulses at the single photon level. We are building highly efficient electro-optic mode converters for single-photon pulses. We explore properties of highly dispersive optical media.

Quantum temporal fourier optics

We explore applications of the concept of time lens and ultrafast all-optical information processing in the field of quantum optics. We explore new opportunities offered by these techniques for quantum information processing. We address technical challenges associated with applying these concepts to non-classical light.

2023

Journal of Lightwave Technology

Precise on-chip spectral and temporal control of single-photon-level optical pulses

2023

SPIE, Proc.vol 12488

Investigating the use of polarization maintaning FBG sensors for GW-based SHG

2021

Advanced Quantum Technologies 4, 2000150

Control and Measurement of Quantum Light Pulses for Quantum Information Science and Technology

2020

Phys. Review Applied 14, 014052

Pure Single Photons From Scalable Frequency Multiplexing

  • T. Hiemstra
  • T.F. Parker
  • P. Humphreys
  • J. Tiedau
  • M. Beck
  • M. Karpiński
  • B.J. Smith
  • A. Eckstein
  • W.S. Kolthammer
  • I.A. Walmsley

2019

Nature Photonics 13, 306

Shaking the phase of light

2018

J. Mod. Opt. 65, 262-267

Measurement of radio-frequency temporal phase modulation using spectral interferometry

2018

PHYSICAL REVIEW LETTERS 121, 083602

Measuring the Single-Photon Temporal-Spectral Wave Function

2018

PHYSICAL REVIEW A 98, 023840

Experimental single-photon pulse characterization by electro-optic shearing interferometry

2018

PHYSICAL REVIEW A 98, 023836

Entanglement swapping for generation of heralded time-frequency-entangled photon pairs

  • D. L. P. Vitullo
  • M. G. Raymer
  • B. J. Smith
  • M. Karpiński
  • L. Mejling
  • K. Rottwitt

2018

J. Mod. Opt. 65, 262-267

Measurement of radio-frequency temporal phase modulation using spectral interferometry

2017

Optics Communications Volume 383

Compressive phase-only filtering at extreme compression rates

2017

Nature Photon. 11, 53-57

Bandwidth manipulation of quantum light by an electro-optic time lens

2017

Phys. Rev. Lett. 118, 023601

Spectral shearing of quantum light pulses by electro-optic phase modulation

2017

Opt. Express 25, 12804-12811

Pulsed single-photon spectrograph by frequency-to-time mapping using chirped fiber Bragg gratings

2016

Applied Optics Volume 55, Issue 19

Efficient adaptation of complex-valued noiselet sensing matrices for compressed single-pixel imaging

2015

Optics Express 23, 10.1364/OE.23.033087

Scheme for on-chip verification of transverse mode entanglement using the electro-optic effect

  • D. Bharadwaj
  • K. Thyagarajan
  • M. Jachura
  • M. Karpiński
  • K. Banaszek

2013

Laser Phys. 23, 025204

Experimental generation of complex noisy photonic entanglement

  • K. Dobek
  • M. Karpiński
  • R. Demkowicz-Dobrzański
  • K. Banaszek
  • P. Horodecki

2011

Opt. Express 19, 10351–10358

Photon coincidences in spontaneous parametric down-converted radiation excited by a blue LED in bulk LiIO₃ crystal

  • J. Galinis
  • M. Karpiński
  • G. Tamošauskas
  • K. Dobek
  • A. Piskarskas

2011

Phys. Rev. Lett. 106, 030501

Experimental Extraction of Secure Correlations from a Noisy Private State

  • K. Dobek
  • M. Karpiński
  • R. Demkowicz-Dobrzański
  • K. Banaszek
  • P. Horodecki

2010

Opt. Commun. 283, 713–718

Quantum and semiclassical polarization correlations