Institute of Plasma Physics - project detail 00213

Coherent excitation coding for exploitation of compressed sensing in laser spectroscopy
Project ID:	GJ17-26284Y
Provider:	Czech Science Foundation
Period:	Jan 01, 2017 - Dec 31, 2019
Recipient - coordinator	Institute of Plasma Physics, Czech Academy of Sciences, Prague
Principal Investigator:	RNDr. Karel Žídek, Ph.D.
Co-recepient(s) / PI(s):	Institute of Plasma Physics, Czech Academy of Sciences, Prague --
Aims of the project: Laser spectroscopy provides us with valuable information about materials and processes in nature. Current techniques are, for instance, able to measure ultrafast absorption dynamics with a high spatial resolution. These methods are, however, often very complex and require a time-consuming acquisition. Compressed sensing is a concept able to highly reduce the acquisition time, while preserving the amount of obtained information. The concept employs coding via random pattern and computational data extraction. A laser beam provides a simple means of obtaining such coding patter via random interference of wavefronts (laser speckles). Use of this aspect has potential to greatly simplify the compressed sensing application. In this project we will, therefore, focus on exploiting the random interference to obtain a spatial and temporal resolution in the photoluminescence and transient absorption measurements. We will study advantages and limiting factors of the approach. Based on the knowledge we will develop and test a set of new techniques – ultimately, extending potential of spectroscopy.
Results:
Junek J., Žídek K.: Fluorescence lifetime imaging via spatio-temporal speckle patterns in a single-pixel camera configuration. Optics Express 29 [4] (2021) 5538-5551. [ Abstract ] [ Link ]
Hlubuček J., Lukeš J., Václavík J., Žídek K.: Enhancement of CASSI by a zero-order image employing a single detector. Applied Optics 60 [5] (2021) 1463-1469. [ Abstract ] [ Link ]
Junek J., Ondič L., Žídek K.: Random temporal laser speckles for the robust measurement of sub-microsecond photoluminescence decay. Optics Express 28 [8] (2020) 12363-12372, č. článku 3. [ Abstract ] [ Link ]
Klein L., Žídek K.: Collection of micromirror-modulated light in the single-pixel broadband hyperspectral microscope. Review of Scientific Instruments 91 [6] (2020) č. článku 5132337. [ Abstract ] [ Link ]
Denk O., Musiienko A., Žídek K.: Differential single-pixel camera enabling low-cost microscopy in the near-infrared spectral region. Optics Express 27 [4] (2019) 4562-4571. [ Abstract ] [ Link ]
Denk O., Zheng K., Zigmantas D., Žídek K.: Compressive imaging of transient absorption dynamics on the femtosecond timescale. Optics Express 27 [7] (2019) 10234-10246. [ Abstract ] [ Link ]
Hlubuček J., Žídek K.: Evaluation of using coded aperture imaging in the mid- and far-infrared region. Eurasip 2018. Eurasip, 2018, č. článku 19.. [5th International Workshop on Compressed Sensing applied to Radar, Multimodal Sensing, and Imaging. Siegen (DE), 10.09.2018-13.09.2018]
Žídek K., Denk O., Hlubuček J.: Lensless Photoluminescence Hyperspectral Camera Employing Random Speckle Patterns. Scientific Reports 7 [1] (2017) č. článku 15309. [ Abstract ] [ Link ]
Žídek K., Hlubuček J., Denk O.: Random image encoding via speckle pattern: The effect of patterns correlation. Optics InfoBase Conference Papers, Proceedings Imaging and Applied Optics. Vol. F44-3D. San Francisco: OSA - The Optical Society, 2017, č. článku JTu5A.1. OSA Publishing. ISBN 978-1-557528-20-9. [ Abstract ] [ Link ] [3D Image Acquisition and Display: Technology, Perception and Applications, 3D 2017. San Francisco (US), 26.06.2017-29.06.2017]