Zobrazeno 1 - 8
of 8
pro vyhledávání: '"Thomas Justin Shaw"'
Autor:
Angsuman Roy, Leif A. Johansson, Carl Boone, George C. Valley, Thomas Justin Shaw, Steven Estrella, George A. Sefler, David Borlaug
Publikováno v:
2020 IEEE Photonics Society Summer Topicals Meeting Series (SUM).
A photonic integrated circuit comprised of an 11 cm multimode speckle waveguide, a 1x32 splitter, and a linear grating coupler array is fabricated and utilized to receive 2 GHz of RF signal bandwidth from 2.5 to 4.5 GHz using a 35 MHz mode locked las
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9a7e20f9cd156f615727922ecb6dd1de
https://doi.org/10.1109/sum48678.2020.9167169
https://doi.org/10.1109/sum48678.2020.9167169
Publikováno v:
2019 IEEE Photonics Conference (IPC).
We demonstrate recovery of Mackey-Glass waveforms and multi-frequency sinusoids using speckle-based reservoir computer. Neurons and RF waveforms drive a spatial light modulator imaged onto a multimode fiber. Fiber output is imaged onto a camera, digi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::144a76eb841dced2959a5627cd4be2b4
https://doi.org/10.1109/ipcon.2019.8908446
https://doi.org/10.1109/ipcon.2019.8908446
Autor:
Leif A. Johansson, Daniele M. Monahan, Thomas Justin Shaw, S. Estella, George C. Valley, Adam C. Scofield, Uttam Paudel, George A. Sefler
Publikováno v:
2019 IEEE Photonics Conference (IPC).
Detection of wideband RF signals has applications in sensing and communications. When the signals of interest are sparse, compressive sensing (CS) provides a sub-Nyquist sampling strategy with potential size, weight, and power savings. The critical e
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fba21978d102b034c63776f7a11fc6d2
https://doi.org/10.1109/ipcon.2019.8908273
https://doi.org/10.1109/ipcon.2019.8908273
Publikováno v:
OFC
BPSK and QPSK RF signals are demodulated without carrier frequency knowledge. The demodulator employs compressive sensing recovery methods and uses speckle within a multimode fiber to perform the requisite random signal projections.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::828581cf162a4f85faa4a52dcc1f4a13
https://doi.org/10.1364/ofc.2019.th2a.38
https://doi.org/10.1364/ofc.2019.th2a.38
Autor:
Leif A. Johansson, Steven Estrella, George C. Valley, David Borlaug, Thomas Justin Shaw, George A. Sefler, Angsuman Roy, Carl Boone
Publikováno v:
Optics Express. 29:19222
A photonic integrated circuit (PIC) comprised of an 11 cm long multimode speckle waveguide, a 1 × 32 splitter, and a linear grating coupler array is fabricated and utilized to receive 2 GHz of radio-frequency (RF) signal bandwidth from 2.5 to 4.5 GH
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a5785ff1fc5436c46062baa462cb085b
https://doi.org/10.1364/oe.408565
https://doi.org/10.1364/oe.408565
Autor:
Andrew Stapleton, Adam C. Scofield, Leif Johannson, George A. Sefler, Thomas Justin Shaw, George C. Valley
Publikováno v:
Optical Data Science: Trends Shaping the Future of Photonics.
We propose and simulate integrated optical devices for accelerating numerical linear algebra (NLA) calculations. Data is modulated on chirped optical pulses and these propagate through a multimode waveguide where speckle provides the random projectio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cfde37f5a62a3745ddf8c91e43786466
https://doi.org/10.1117/12.2294574
https://doi.org/10.1117/12.2294574
Publikováno v:
SPIE Proceedings.
Direct digitization of long, wideband chirped RF signals in the GHz band requires power hungry ADCs and produces large data sets. Here we present an optical scheme to perform multi-coset sampling of such signals with reduced power consumption and sma
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::30a289d548f7e1d11d7a4ccb681d5c17
https://doi.org/10.1117/12.2076285
https://doi.org/10.1117/12.2076285
Publikováno v:
SPIE Proceedings.
The optical wideband converter (OWC) is a system for measuring properties of RF signals in the GHz band without use of high speed electronics. In the OWC the RF signal is modulated on a repetitively pulsed optical field with a large wavelength chirp,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b59fffa96f29c4ec939245c685717888
https://doi.org/10.1117/12.2002144
https://doi.org/10.1117/12.2002144