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499 results on '"Soskind, Yakov"'

10. Multi-frequency low-noise semiconductor laser sources enabling advancement of resonant fiber optic gyroscopes including performance over temperature

Author

Busse, Lynda E., Soskind, Yakov, Girard-Deschênes, Émile, Costin, François, Ayotte, Simon, Babin, André, Légaré, Katherine, Labranche, Bruno, Dusablon, Laurent, Pelletier-Rioux, Jean-Sébastien, Dufour, Patrick, Deschênes, Sébastien, Falci, Rodrigo, Bilodeau, Ghislain, Chrétien, Philippe, Davidson, Charles-André, D'amato, Dominique, Laplante, Mathieu, Baribault, Robert, Smiciklas, Marc, Strandjord, Lee, Narayanan, Chellappan, Compton, Robert, and Sanders, Glen

Published
2024
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29. Miniaturized time-resolved fluorescence spectrometer system

Author

Gasser, Anas, Shcheglov, Artem, Lapauw, Thomas, van den Dries, Thomas, Ingelberts, Hans, Hoving, Willem, Aalders, Maurice, Kuijk, Maarten, Busse, Lynda E., Soskind, Yakov, Mock, Patrick C., Busse, Lynda E., Soskind, Yakov, Mock, Patrick C., Laboratorium for Micro- and Photonelectronics, Electronics and Informatics, Faculty of Engineering, Applied Physics and Photonics, Biomedical Engineering and Physics, APH - Methodology, Amsterdam Neuroscience - Brain Imaging, and APH - Personalized Medicine

Subjects
Time-Gated Imaging Sensors, Fluorescence lifetime, CAPS Sensor Systems, Czerny-Turner Spectrometer, TRFS, Miniaturization
Abstract

Time-resolved fluorescence spectroscopy is a promising and versatile spectroscopy technique. While conventional fluorescence spectroscopy is concerned with the spectral features of fluorescence emission, time-resolved fluorescence spectroscopy (TRFS) also captures the temporal behavior of the excited molecules. In addition to applications in rapid medical diagnoses, several applications were reported in forensics, chemical analysis and biology. The existing TRFS systems are based on complex optical setups which results in bulky and large systems. Therefore, using them in practice is still not feasible. In this work, we present a miniaturized system that combines a compact Czerny-Turner based spectrometer layout with our high-speed time-gated image sensor of 32×32 pixels based on the Current-Assisted Photonic Sampler (CAPS) sensor. The system operates in the visible wavelength range with a high spectral resolution. The novel image sensor is capable of measuring down to sub-nanosecond lifetimes. The proof-of-concept module was assembled and characterized for three fluorophores.

Published
2022
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30. Simulating the study of exoplanets using photonic spectrographs

Author

Busse, Lynda E., Soskind, Yakov, Perez, Marcos, Gatkine, Pradip, Jovanovic, Nemanja, Jewell, Jeffrey, Wallace, J. Kent, Mawet, Dimitri, Busse, Lynda E., Soskind, Yakov, Perez, Marcos, Gatkine, Pradip, Jovanovic, Nemanja, Jewell, Jeffrey, Wallace, J. Kent, and Mawet, Dimitri

Abstract

Photonic spectrographs offer a highly miniaturized, flexible, and stable on-chip solution for astronomical spectroscopy and can be used for various science cases such as determining the atmospheric composition of exoplanets to understand their habitability, formation, and evolution. Arrayed Waveguide Gratings (AWGs) have shown the best promise to be used as an astrophotonic spectrograph. We developed a publicly-available tool to conduct a preliminary examination of the capability of the AWGs in spectrally resolving exoplanet atmospheres. We derived the Line-Spread- Function (LSF) as a function of wavelength and the Full-Width-at-Half-Maximum (FWHM) of the LSF as a function of spectral line width to evaluate the response of a discretely- and continuously sampled low-resolution AWG (R ~ 1000). We observed that the LSF has minimal wavelength dependence (~5%), irrespective of the offset with respect to the center-wavelengths of the AWG channels, contrary to the previous assumptions. We further confirmed that the observed FWHM scales linearly with the emission line width. Finally, we present simulated extraction of a sample molecular absorption spectrum with the discretely- and continuously-sampled low-resolution AWGs. From this, we show that while the discrete AWG matches its expected resolving power, the continuous AWG spectrograph can, in principle, achieve an effective resolution significantly greater (~ 2x) than the discrete AWG. This detailed examination of the AWGs will be foundational for future deployment of AWG spectrographs for astronomical science cases such as exoplanet atmospheres.

Published
2022

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