Our research

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.

Our publications

Large-scale spectral bandwidth compression by complex electro-optic temporal phase modulation

Filip Sosnicki, Michal Karpinski

arXiv preprint arXiv:1803.04392 (2018).

Engineering the spectral and temporal properties of a GHz-bandwidth heralded single-photon source interfaced with an on-demand, broadband quantum memory

Patrick S. Michelberger, Michal Karpinski, Ian A. Walmsley, Joshua Nunn

Journal of Modern Optics 65, 1668–1679 (2018).

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

Dashiell L. P. Vitullo, Michael G. Raymer, Brian J. Smith, Michal Karpinski, Lasse Mejling, Karsten Rottwitt

arXiv preprint, arXiv:1802.00110 (2018).

Measurement of radio-frequency temporal phase modulation with chirped optical pulses

Michal Jachura, Jan Szczepanek, Wojciech Wasilewski, Michal Karpinski

Journal of Modern Optics 65, 262–267 (2018).


Measuring the single-photon temporal-spectral wave function

Alex O. C. Davis, Valerian Thiel, Michal Karpinski, Brian J. Smith

arXiv preprint, arXiv:1709.05248 (2017).

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

Michal Karpinski, Michal Jachura (equal contribution), Laura J. Wright, Brian J. Smith

Nature Photonics 11, 53 (2017).
See also our press release!

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

Alex O. C. Davis, Paul M. Saulnier, Michal Karpinski, Brian J. Smith

Optics Express 25, 12804–12811 (2017).
Selected for Spotlight on Optics! Here's a brief summary of our paper!

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

Laura J. Wright, Michal Karpinski, Christoph Soeller, Brian J. Smith

Physical Review Letters 118, 023601 (2017).

arXiv:1605.00640 (2016) .

Quantum mechanical which-way experiment with an internal degree of freedom

Konrad Banaszek, Pawel Horodecki, Michal Karpinski, Czeslaw Radzewicz

Nature Communications 4, 2594 (2013) .
See also our press release!

The Group

Who we are

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.

Our Lab

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).

Michał Karpiński
Adiunkt (Assistant Professor)

Lab Leader

Filip Sośnicki
PhD student

Master of GPU computing

Ali Golestani Shishvan
PhD Student

Michał Mikołajczyk
MSc student

Adam Widomski
MSc Student

Tomasz Kowalczyk
optoelectronics technician

Former members

Maciek Gałka
MSc student, 2016–2017

working on his PhD at Cambridge University...

Join Us

We are constantly looking for motivated BSc, Masters and PhD students.

  • We currently offer funded Masters positions within a project funded by the Foundation for Polish Science on manipulating spectrally entangled photon pairs. Interested? Please click here or contact us!

  • We are looking to hire an optoelectronics technician to support our lab activities.

Contact Us

Find Us

We are located at the Ochota Campus of the University of Warsaw, in the interferometrically stable basement of the Geophysics Building (room 021A).

We are a short tram ride from the centre of Warsaw. The Warsaw Chopin Airport is just a 20-minute bus ride away. On sunny days we escape the darkness of the lab to enjoy the adjacent Pole Mokotowskie Park.

ul. Pasteura 7, 02-093 Warszawa, Poland (+48) 22 55 32 740, 46 872 optics@fuw.edu.pl