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You searched on: Topic Area: Optoelectronics Sorted by: title

Displaying records 11 to 20 of 31 records.
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11. Full PMD vector measured directly from modulated data using linear optical sampling
Topic: Optoelectronics
Published: 7/15/2009
Authors: Paul A Williams, Tasshi Dennis
Abstract: We demonstrate a new technique to monitor the polarization-mode dispersion in a fiber communication channel by analyzing the modulated data at the fiber output measured with Polarization-Sensitive Linear Optical Sampling (PS-LOS).

12. Gallium Nitride Nanowires for On-Chip Optical Interconnects on Ex-Situ Substrates
Topic: Optoelectronics
Published: 1/16/2013
Authors: Matthew David Brubaker, Paul T Blanchard, John B. Schlager, Aric Warner Sanders, Alexana Roshko, Shannon M.M. Duff, Jason Gray, Victor M. Bright, Norman A Sanford, Kristine A Bertness
Abstract: In this letter we report on the fabrication, device characteristics, and optical coupling of a two-nanowire device comprising light-emitting diode and photoconductive GaN nanowires. Axial p-n junction GaN nanowires were grown by molecular beam epita ...

13. Graphene-on-dielectric micromembrane for optoelectromechanical hybrid devices
Topic: Optoelectronics
Published: 2/7/2014
Authors: Jacob M Taylor, Silvan Schmid, Tolga Bagci, Emil Zeuthen, Patrick Herring, Maja Cassidy, C. M. Marcus, Bartolo Amato, Anja Boisen, Yong Cheol Shin, Jing Kong, Anders Sorensen, Koji Usami, E.S. Polzik
Abstract: Due to their exceptional mechanical and optical properties, dielectric silicon nitride (SiN) mi- cromembranes have become the centerpiece of many optomechanical experiments. Efficient capac- itive coupling of the membrane to an electrical system woul ...

14. High-Accuracy Photoreceiver Frequency Response Measurements at 1.55 um by Use of a Heterodyne Phase-Locked Loop
Topic: Optoelectronics
Published: 9/29/2011
Authors: Tasshi Dennis, Paul D Hale
Abstract: We demonstrate a high-accuracy heterodyne measurement system for characterizing the magnitude of the frequency response of high-speed 1.55 µm photoreceivers from 2 MHz to greater than 50 GHz. At measurement frequencies below 2 GHz, we employ a phase- ...

15. Low-frequency noise in gallium nitride nanowire mechanical resonators
Topic: Optoelectronics
Published: 12/7/2012
Authors: Jason Gray, Kristine A Bertness, Norman A Sanford, Charles T. Rogers
Abstract: We report on the low-frequency 1/f (flicker) parameter noise displayed by the resonance frequency and resistance of doubly clamped c-axis gallium nitride nanowire (NW) mechanical resonators. The resonators are electrostatically driven and their mech ...

16. Microwave near-field probes for photovoltaic applications
Topic: Optoelectronics
Published: 6/19/2011
Author: Joel C Weber
Abstract: The photoresponse of three different photovoltaic Cu(In, Ga)Se^d2^ (CIGS) samples as well as GaAs and silicon bulk samples is measured using near-field scanning microwave microscopy (NSMM). Modeling predicts light-dependent conductivity values fo ...

17. Noncontact measurement of charge carrier lifetime and mobility in GaN nanowires
Topic: Optoelectronics
Published: 8/27/2012
Authors: Christopher M. Dodson, Patrick Parkinson, Kristine A Bertness, Hannah J Joyce, Laura M Herz, Norman A Sanford, Michael B Johnston
Abstract: The first noncontact photoconductivity measurements of gallium nitride nanowires (NWs) are presented, revealing a high crystallographic and optoelectronic quality achieved by use of catalyst-free molecular beam epitaxy. In comparison with bulk ma ...

18. Optical detection of radio waves through a nanomechanical transducer
Topic: Optoelectronics
Published: 3/5/2014
Authors: Jacob M Taylor, Tolga Bagci, A Simonsen, Silvan Schmid, L Villanueva, Emil Zeuthen, Anders Sorensen, Koji Usami, A Schliesser, E.S. Polzik
Abstract: Low-loss transmission and sensitive recovery of weak radio-frequency (rf) and mi- crowave signals is an ubiquitous technological challenge, crucial in fields as diverse as radio astronomy, medical imaging, navigation and communication, including th ...

19. Optical fiber-coupled cryogenic radiometer with carbon nanotube absorber
Topic: Optoelectronics
Published: 4/1/2012
Authors: David J Livigni, Nathan A Tomlin, Christopher L. Cromer, John H Lehman
Abstract: A cryogenic radiometer was constructed for direct-substitution optical fiber power measurements. The cavity is intended to operate at the 3 K temperature stage of a dilution refrigerator or 4.2 K stage of a liquid cryostat. The optical fiber is remov ...

20. Optical performance monitoring of (Q)PSK data channels using artificial neural networks trained with parameters derived from delay-tap asynchronous diagrams
Topic: Optoelectronics
Published: 2/15/2011
Authors: Jeffrey A Jargon, Xiaoxia Wu, Alan Willner, Loukas Paraschis
Abstract: We demonstrate a technique of using artificial neural networks trained with parameters derived from delay-tap asynchronous diagrams for optical performance monitoring of phase shift keying (PSK) data signals. We show that asynchronous diagrams from b ...

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