Dr. Michal Jachura Profile

Dr. Michal Jachura

at Univ of Warsaw

SPIE Involvement:

Author

Publications (9)

SPIE Journal Paper | 11 January 2024 Open Access

Photon information efficiency limits in deep-space optical communications

Marcin Jarzyna, Ludwig Kunz, Wojciech Zwoliński, Michal Jachura, Konrad Banaszek

OE, Vol. 63, Issue 04, 041209, (January 2024) https://doi.org/10.1117/12.10.1117/1.OE.63.4.041209

KEYWORDS: Background noise, Interference (communication), Quantum limits, Pulse signals, Quantum signals, Deep space optical communications, Quantum numbers, Modulation, Received signal strength, Quantum receivers

Read Abstract +

DOWNLOAD PAPER

Proceedings Article | 12 July 2023 Open Access

Modelling concurrent IM/DD key distribution and data transmission over an optical LEO-to-ground link

Michał Jachura, Mikołaj Lasota, Piotr Kolenderski, Konrad Banaszek

Proceedings Volume 12777, 127771B (2023) https://doi.org/10.1117/12.2689278

KEYWORDS: Satellites, Transmitters, Data transmission, Receivers, Free space optics, Astronomical imaging, Quantum numbers, Quantum key distribution, Modeling, Beam divergence

Read Abstract +

DOWNLOAD PAPER

Proceedings Article | 12 July 2023 Open Access

Approaching capacity limits in photon-starved noisy optical communication

Marcin Jarzyna, Ludwig Kunz, Michal Jachura, Konrad Banaszek

Proceedings Volume 12777, 127770G (2023) https://doi.org/10.1117/12.2688819

KEYWORDS: Quantum bounds, Pulse signals, Quantum capacity, Quantum signals, Quantum limits, Quantum regime, Quantum noise, Quantum receivers, Quantum optical communication, Quantum numbers

Read Abstract +

DOWNLOAD PAPER

Proceedings Article | 11 June 2021 Open Access

Photon-efficient quantum key distribution using multiqubit time-bin encoding

Michał Jachura, Marcin Jarzyna, Marcin Pawłowski, Konrad Banaszek

Proceedings Volume 11852, 118525J (2021) https://doi.org/10.1117/12.2599962

Read Abstract +

DOWNLOAD PAPER

Proceedings Article | 12 July 2019 Open Access

Utilizing time-bandwidth space for efficient deep-space communication

Konrad Banaszek, Michal Jachura, Wojciech Wasilewski

Proceedings Volume 11180, 111805X (2019) https://doi.org/10.1117/12.2536132

KEYWORDS: Receivers, Modulation, Frequency shift keying, Adaptive optics, Polarization, Phased array optics, Phase shift keying, Signal detection, Transmitters, Optical communications

Read Abstract +

DOWNLOAD PAPER

Proceedings Article | 4 March 2019 Paper

Approaching the ultimate capacity limit in deep-space optical communication

Konrad Banaszek, Ludwig Kunz, Marcin Jarzyna, Michal Jachura

Proceedings Volume 10910, 109100A (2019) https://doi.org/10.1117/12.2506963

KEYWORDS: Signal detection, Photodetectors, Interference (communication), Modulation, Optical communications, Quantum efficiency, Optical filters, Receivers, Sensors, Quantum communications

Read Abstract +

Proceedings Article | 14 March 2018 Presentation

Discrete spatial entanglement in multimode nonlinear waveguides (Conference Presentation)

Michal Jachura, Michal Karpinski, Konrad Banaszek, Divya Bharadwaj, Jasleen Lugani, Krishna Thyagarajan

Proceedings Volume 10540, 1054028 (2018) https://doi.org/10.1117/12.2287422

KEYWORDS: Waveguides, Quantum communications, Quantum cryptography, Quantum dot lasers, Quantum dots, Imaging spectroscopy, Quantum wells, Quantum optics, Dispersion, Spatial filters

Read Abstract +

Proceedings Article | 15 February 2018 Presentation + Paper

Optimizing deep-space optical communication under power constraints

Marcin Jarzyna, Wojciech Zwoliński, Michał Jachura, Konrad Banaszek

Proceedings Volume 10524, 105240A (2018) https://doi.org/10.1117/12.2289653

KEYWORDS: Optical communications, Receivers, Signal detection, Transmitters, Modulation, Interference (communication), Photodetectors, Sensors, Channel projecting optics, Quantum optics

Read Abstract +

Proceedings Article | 3 August 2016 Presentation

Electro-optic bandwidth manipulation of quantum light (Conference Presentation)

Michal Karpinski, Michal Jachura, Laura Wright, Brian Smith

Proceedings Volume 9900, 990015 (2016) https://doi.org/10.1117/12.2229232

KEYWORDS: Single photon, Electro optics, Quantum information processing, Optical filters, Phase modulation, Modulation, Quantum optics, Integrated photonics, Quantum efficiency, Terahertz radiation

Read Abstract +

Spectral-temporal manipulation of optical pulses has enabled numerous developments within a broad range of research topics, ranging from fundamental science to practical applications. Within quantum optics spectral-temporal degree of freedom of light offers a promising platform for integrated photonic quantum information processing. An important challenge in experimentally realizing spectral-temporal manipulation of quantum states of light is the need for highly efficient manipulation tools. In this context the intrinsically deterministic electro-optic methods show great promise for quantum applications. We experimentally demonstrate application of electro-optic platform for spectral-temporal manipulation of ultrashort pulsed quantum light. Using techniques analogous to serrodyne frequency shifting we show active spectral translation of few-picosecond single photon pulses by up to 0.5 THz. By employing an approach based on an electro-optic time lens we demonstrate up to 6-fold spectral compression of heralded single photon pulses with efficiency that enables us to significantly increase single photon flux through a narrow bandpass filter. We realize the required temporal phase manipulation by driving a lithium niobate waveguided electrooptic modulator with 33 dBm sinusoidal RF field at the frequency of either 10 GHz or 40 GHz. We use a phase lock loop to temporally lock the RF field to the 80 MHz repetition rate of approximately 1 ps long optical pulses. Heralded single photon wavepackets are generated by means of spontaneous parametric down-conversion in potassium dihydrogen phosphate (KDP) crystal, which enables preparation of spectrally pure single photon wavepackets without the need for spectral filtering. Spectral shifting is achieved by locking single-photon pulses to the linear slope of sinusoidal 40 GHz RF phase modulation. We verify the spectral shift by performing spectrally resolved heralded single photon counting, using frequency-to-time conversion by means of a highly dispersive chirped fiber Bragg grating. We verify the non-classicality of spectrally shifted single photons by measuring high-visibility Hong-Ou-Mandel interference using a reference single photon pulse. Spectral compression is based on the time lens principle, which requires locking optical pulses to approximately quadratic region of sinusoidal phase modulation. We utilize both 10 GHz and 40 GHz RF driving frequencies. Bandwidth compression is achieved by chirping the single photon pulse using an appropriate length of single-mode fibre and subsequently subjecting it to the action of the time lens. We verify spectral compression directly using the aforementioned spectrally-resolved heralded single photon counting method. We achieve 3-fold spectral compression of 2 nm bandwidth single photon pulses using 40 GHZ modulation frequency, and 6-fold spectral compression of 0.9 nm bandwidth single photon pulses using 10 GHz modulation frequency. Overall transmission of our set-up exceeding 30% enables practical usability of our spectral compression method which we demonstrate experimentally by showing an increased photon flux through a narrowband filter. Our results present an important contribution towards implementing quantum information processing in the spectral-temporal degree of freedom of a photon. In the context of quantum networks they present an enabling tool towards efficient photonic interfacing of different quantum information processing platforms.

Showing 5 of 9 publications

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Keywords/Phrases

Search In:

Publication Years