Group page of Quantum Photonics Laboratory @ FUW

What are our interests?

Our research


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


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 the properties of highly dispersive optical media.


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

Measuring the single-photon temporal-spectral wave function
Alex O. C. Davis, Valérian Thiel, Michał Karpiński, Brian J. Smith
Phys. Rev. Lett. 121, 083602 (2018).

Experimental single-photon pulse characterization by electro-optic shearing interferometry
Alex O. C. Davis, Valérian Thiel, Michał Karpiński, Brian J. Smith
Phys. Rev. A. 98, 023840 (2018).

Large-scale spectral bandwidth compression by complex electro-optic temporal phase modulation
Filip Sośnicki, Michał Karpiński
arXiv preprint arXiv:1803.04392 (2018), Optics Express (in press).

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,
Phys. Rev. A 98, 026836 (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 center 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 superconducting single-photon-counting detectors. We appreciate the support of Konrad Banaszek, Czesław Radzewicz and numerous funding programmes (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).

Main Team
Michał Karpiński
Team leader
Filip Sośnicki
PhD Student
Ali Golestani
PhD Student
Michał Mikołajczyk
PhD Student
Adam Widomski
Master Student
summer students
Prashant Dagale
Summer student
Summer of 2018
Martin Luttmann
Summer student
Summer of 2018
Monika Mikulicz
Summer student
Summer of 2018
Maciek Gałka
Now, working on his PhD in Cambridge.
Other collaborators
Łukasz Zinkiewicz

Contact Us


We are currently looking for a post doctoral researcher to work in our newest project, Phase-only shaping of light pulses for applications in quantum technologies, funded within the First Team programme of the Foundation for Polish Science. We are looking either for a talented theorist to study applications of single-photon spectral shaping or an experimentalist knowledgeable in optics of femtosecond pulses. We offer a competitive salary for 2+ years, interesting research topics and international collaboration opportunities. A formal announcement is expected be posted in May 2019. For informal enquiries please contact Michal Karpinski mkarp at fuw. edu. pl

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