[Faculty] Fwd: [CSRC-SDSU COLLOQUIUM]: Photonic technology for low size weight and power microwave communications applications

[Jose Castillo]

*DATE:*  Friday, May 1st, 2015

*TITLE:*  Photonic technology for low size weight and power microwave
communications applications

*TIME:*  3:30 PM

*LOCATION:*  GMCS 214

*SPEAKER:*  Dr. James Adleman. Photonics Group at SPAWAR

*ABSTRACT:*  The Advanced Photonic Technologies group at SSC Pacific works
to develop and transition next generation photonic technology to provide
the fleet. This talk will discuss efforts at SSC PAC to design and
implement RF photonics systems to enable channelization, spectrum analysis,
and agile RF-IF down conversion of microwave signals, as well as the
development of novel optoelectronic devices and materials for  low power
and high bandwidth analog and digital communications.

Due to rapid growth in the capability of microwave and millimeter wave
transceivers, real time awareness and signal analysis across large areas of
the electromagnetic spectrum (e.g. 2-40 GHz) has become vital to both
commercial and defense applications.  The many THz of useful bandwidth
available in optical waveguides positions RF photonics as a vital technique
for radio communication and spectrum analysis in this frequency domain.  A
novel microwave/millimeter-wave channelizer will be presented based on a RF
photonic front-end employing parametric wavelength multicasting and comb
generation.
This new technology enables a contiguous bank of channelized coherent I/Q
IF signal covering extremely wide RF instantaneous bandwidth.
Additionally, a new design for a wide band tunable downconverting RF link
from C to Ka band using injection locking of commercial DFBs will be
described.   The Injection locked laser design relaxes tuning range
requirement of RF local oscillator, and provides high optical power for
efficient RF-IF conversion while minimizing degradation to link sensitivity
due to phase noise.
We will discuss sensitivity and dynamic range performance of these systems
as well as practical implementation issues such as phase stability and
laser locking bandwidth.  We will present implementation of photonic
integrated circuit filters in low loss SiO2 based platform to perform very
low size weight and power spectrum analysis, with the goal enabling
wideband spectrum monitoring and awareness in a man portable device.
Finally, we will present initial work on optoelectronic tunneling
transistor devices using graphene and other two dimensional lattice
materials to create broadband infrared sources for chip scale photonic
applications.

*HOST:*  Dr. Christopher Curtis

For future events, please visit our website at:

http://www.csrc.sdsu.edu/colloquium.html

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SDSU Computational Science Research Center
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-- 

Jose E. Castillo  Ph.D.

Director / Professor

Computational Science Research Center

5500 Campanile Dr

San Diego State University

San Diego CA 92182-1245

619 5947205/3430, Fax 619-594-2459

 http://www.csrc.sdsu.edu/mimetic-book/
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