Zobrazeno 1 - 10
of 23
pro vyhledávání: '"Saikrishna Reddy Konatham"'
Publikováno v:
Nature Communications, Vol 12, Iss 1, Pp 1-9 (2021)
Extracting weak, ultrafast single-shot waveforms from a noisy background has critical uses in many applications. Here, the authors present a method to enhance signals and recover arbitrary waveforms from very noisy backgrounds by manipulating the phy
Externí odkaz:
https://doaj.org/article/7993829372f0499aaadae9c4d95789b3
Autor:
Saikrishna Reddy Konatham, Reza Maram, Luis Romero Cortés, Jun Ho Chang, Leslie Rusch, Sophie LaRochelle, Hugues Guillet de Chatellus, José Azaña
Publikováno v:
Nature Communications, Vol 11, Iss 1, Pp 1-12 (2020)
Real-time dynamic Fourier analysis of high-speed signals is difficult using either digital or analog schemes. Here, the authors present a universal analog approach that can track the changing frequency spectrum of waveforms in a real-time fashion at
Externí odkaz:
https://doaj.org/article/74f108304b324c2ab828267158498884
Autor:
Saikrishna Reddy Konatham, José Azaña
Publikováno v:
2021 IEEE Photonics Conference (IPC).
We propose and numerically validate a photonic-based approach for simultaneous gap-free real-time spectral analysis (RT-SA) of multiple broadband (GHz-bandwidth) waveforms centered at different high frequency (mm-wave) bands. This exploits the concep
Publikováno v:
2021 IEEE Photonics Society Summer Topicals Meeting Series (SUM).
We demonstrate the recovery of signals completely lost under in-band noise, in a real-time and single shot manner. The recovery system operates in a completely asynchronous manner from the signal, offering a versatile and efficient solution to in-ban
Publikováno v:
Nature Communications
Nature Communications, Vol 12, Iss 1, Pp 1-9 (2021)
Nature Communications, Vol 12, Iss 1, Pp 1-9 (2021)
The ability to detect ultrafast waveforms arising from randomly occurring events is essential to such diverse fields as bioimaging, spectroscopy, radio-astronomy, sensing and telecommunications. However, noise remains a significant challenge to recov
Publikováno v:
OSA Advanced Photonics Congress 2021.
We demonstrate that frequency-domain passive amplification of optical pulses through the Talbot effect preserves the phase information, enabling an enhanced reconstruction of the complex-field temporal waveform, with resolutions down to ~2ps.
Publikováno v:
Journal of Lightwave Technology
Journal of Lightwave Technology, Institute of Electrical and Electronics Engineers (IEEE)/Optical Society of America(OSA), 2020, 38 (19), pp.5356-5367. ⟨10.1109/JLT.2020.3010516⟩
Journal of Lightwave Technology, Institute of Electrical and Electronics Engineers (IEEE)/Optical Society of America(OSA), 2020, 38 (19), pp.5356-5367. ⟨10.1109/JLT.2020.3010516⟩
This article provides a review and deeper insight on the fundamentals and main design trade-offs of a new method for joint time-frequency analysis of broadband signals, namely, the time-mapped spectrogram (TM-SP). This method involves a temporal peri
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::de5a7bd52eb18b16ae05ac292ec695a7
https://hal.archives-ouvertes.fr/hal-02938195
https://hal.archives-ouvertes.fr/hal-02938195
Publikováno v:
2020 IEEE Photonics Society Summer Topicals Meeting Series (SUM).
We present a passive amplification method based on the Talbot effect that allows for single-shot recovery of arbitrary signals buried under noise. The scheme can be reconfigured to operate on either narrowband or broadband signals, representing a com
Autor:
Leslie A. Rusch, Luis Romero Cortes, José Azaña, Hugues Guillet de Chatellus, Saikrishna Reddy Konatham, J. H. Chang, Reza Maram, Sophie LaRochelle
Publikováno v:
Nature Communications
Nature Communications, Nature Publishing Group, 2020, 11 (1), ⟨10.1038/s41467-020-17119-2⟩
Nature Communications, Vol 11, Iss 1, Pp 1-12 (2020)
Nature Communications, Nature Publishing Group, 2020, 11 (1), ⟨10.1038/s41467-020-17119-2⟩
Nature Communications, Vol 11, Iss 1, Pp 1-12 (2020)
Real-time tracking of a waveform frequency content is essential for detection and analysis of fast rare events in communications, radar, radio astronomy, spectroscopy, sensing etc. This requires a method that can provide real-time spectrum analysis (
Autor:
Saikrishna Reddy Konatham, Sophie LaRochelle, J. H. Chang, L. Romero Cortés, Leslie A. Rusch, José Azaña
Publikováno v:
Conference on Lasers and Electro-Optics.
We propose a method for real-time spectral analysis of high-frequency and high- bandwidth waveforms, without the downconversion stage. Time-mapped spectrograms of nanosecond-long microwave pulses modulated on high carrier frequencies are captured dir