Tag Archives: Webinar


Software-Defined Metro Inter Data Center Network

Date:  Friday, September 18, 2015
Time:  11am Arizona Time / 2pm East Coast Time

Please register by clicking on the link: Webinar   or copy and pasting to your browser:  https://attendee.gotowebinar.com/register/775783887831714049
Webinar ID: 130-430-507


Dr. Payman Samadi
Post-doctoral Research Scientist
Columbia University

Payman Samadi received his Ph.D. degree in photonics and telecommunications from McGill University, Montreal, QC, Canada in 2012.  He was a product manager at Optiwave Systems Inc. leading optical system simulation software tools.  He is currently a post-doctoral research scientist at the lightwave research laboratories of Columbia University, New York, NY, USA.  His research interests include network architecture, software-defined networking and optical interconnects for applications in data centers and distributed computing.


The rise of cloud computing and big data has enormously increased the deployment of data centers.  Majority of the data centers are small to mid-sized, generally located in metro-scale distances and are actively communicating for services such as data replication, Virtual Machine (VM) migration, backup, load balancing or fault/disaster recovery.  This work presents a software-defined optical network to provide on-demand, bandwidth-selective and high throughout inter data center connectivity in metro-scale distances.

2015 9-18 Payman Samadi


Verdet Constant in Microstructured FePt Nanoparticles in PS-P2VP Copolymer Composite Films

Date:  Friday, August 21, 2015
Time:  11am-12pm Arizona Time / 2pm East Coast Time

Please register by clicking on the link: Webinar   or copy and pasting to your browser:  https://attendee.gotowebinar.com/register/373186709715434497

Or attend in person!
University of Arizona, College of Optical Sciences, Room 447


Alexander Miles
Graduate Student
University of Arizona

Alexander Miles is a doctoral candidate in Optical Sciences at the University of Arizona working with Dr. Robert Norwood.  His work has touched on optical materials, sensing, holography, photonics, solar energy collection, and thin film filters.  He is graduating in December 2015.


Complex Faraday effect and magnetic permeability measurements on iron-platinum (FePt) nanoparticles embedded in a polystyrene-poly(2-vinyl)Pyridine(PS-P2VP) copolymer matrix are reported.  Possible applications include high performance biomagnetic field sensors and optical isolators.

2015 8-21 Alex Miles


Silicon Photonic Interconnection Networks in High Performance Data Centers

Date: December 12, 2014
Time: 11:00am Pacific Time (12pm AZT, 2pm ET, 1pm CT)

Register or Login to the Webinar


Dr. Keren Bergman
Chair of Electrical Engineering
Columbia University

Keren Bergman is the Charles Batchelor Professor and Chair of Electrical Engineering at Columbia University where she also directs the Lightwave Research Laboratory (http://lightwave.ee.columbia.edu/). She leads multiple research programs on optical interconnection networks for advanced computing systems, data centers, optical packet switched routers, and chip multiprocessor nanophotonic networks-on-chip. Dr. Bergman holds a Ph.D. from M.I.T. and is a Fellow of the IEEE and of the OSA.


As future data centers aim to realize scalable performance the challenge of energy efficient data movement rather than computation is paramount. Silicon photonics has emerged as perhaps the most promising technology to address these challenges by providing ultra-high bandwidth density communication capabilities that is essentially distance independent. Recent advances in chip-scale silicon photonic technologies have created the potential for developing optical interconnection networks that offer highly energy efficient communications and significantly improve computing performance-per-Watt. This talk will explore the design of silicon photonic interconnected architectures for data centers and their impact on the system level performance.



After registering, you will receive a confirmation email containing information about joining the webinar.

Register now!

2014 12-12 Keren Bergman Flyer

CIAN Student Webinar Talk Series – Jean-Pierre Papouloute, Tuskegee University

Ge/Si Device Technology for Photonics Integration

Date: Friday, November 21, 2014
Time: 1:30pm Pacific Time
Look up your time zone here.

Login to the Webinar here*


Jean-Pierre Papouloute
Undergraduate Student
Electrical Engineering
Tuskeegee University

Jean-Pierre Papouloute is currently working toward a B.Sc. in Electrical Engineering at Tuskegee University. Since September 2013, he has been working under Dr. Korivi on the  development of monolithically integrated high sensitivity Ge/Si hetero-junction field effect transistor (HJFET) photodetector for Si optoelectronic chip. His research experience is focused on fabricating and testing a silicon waveguide, and fabricating an isolated Si/Ge HJFET.


The overall research goal is to realize a fully integrated germanium (Ge)/silicon (Si) hetero-junction field effect transistor (HJFET) detector device. An integrated silicon waveguide connects the HJFET device to an optical fiber that brings in light from an external source. The proposed Ge/Si HJFET is based on a modified Ge/Si p-n junction photodiode. It has a metal semiconductor field effect transistor (MESFET) type structure. It is fabricated on a silicon-on-insulator (SOI) substrate, with a n-Si channel on the active Si layer. The gate is an island of Ge. Aluminum (Al) patterns form the ohmic source and drain contacts. The buried oxide (BOX) layer separates the active Si layer from the bulk Si layer or Si handle. When light is incident on the Ge gate island, electron-hole pairs are generated at the gate creating a channel between the source and drain. When a drain voltage is applied, photocurrent flows through the external circuit.

Login to the Webinar here*

If you missed Jean-Pierre Papouloutes’s talk, see it below!

*link will not work until date & time of webinar


Results from the CIAN-Sandia silicon photonic MPW chip: preliminary report

Date: Friday, October 10, 2014
Time: 1:30PM – 3:30PM Pacific Time

Login to the Webinar


Dr. Shayan Mookherjea
Associate Professor
Electrical & Computer Engineering

Shayan Mookherjea is an Associate Professor of Electrical and Computer Engineering at the University of California, San Diego. He received the BS degree with honors from Caltech, the SM degree from MIT, and the PhD from Caltech in Electrical Engineering with a minor in Physics. His awards include: Wilts Prize, Hellman Faculty Fellow, NSF CAREER award, IEEE Senior Member, and OSA Fellow. The Micro/Nano-Photonics Group (http://mnp.ucsd.edu) started research in silicon photonics in 2008, with 5 PhD theses, 24 journal papers and 47 conference publications so far on these topics, and has active collaborations with several external industrial partners.


In 2013, we created an opportunity for five university teams from CIAN [Cornell, Univ. of Arizona, UC Berkeley (2 groups) and UC San Diego] to collaborate with Sandia National Laboratories (Chris DeRose, Tony Lentine, Andrew Pomerene, Andrew Starbuck, Douglas Trotter) in a multi-project-wafer fabrication effort, to design, fabricate and measure optoelectronic silicon photonic components for data center and access networks.

In this talk, I will present some of the results from the first fabrication run, including passive and active waveguides and micro-resonators, thermo-optic tuned filters, variable optical attenuators, Ge detectors, and some examples of sub-system performance. Results from this first run will inform the design of improved components, alongside space for some new designs, in a second fabrication run proposed in the near future.

Please register for “Results from the CIAN-Sandia silicon photonic MPW chip: Preliminary Report” on Oct 10, 2014 1:30 PM PDT at:


After registering, you will receive a confirmation email containing information about joining the webinar.

2014 10-10 Shayan Mookherjea UCSD

CIAN Student Webinar Talk Series – Atiyah Ahsan, Columbia University

Advanced Optical Performance Monitoring for Next-Generation Dynamic Optical Networks

Date: Friday, September 26, 2014
Time: 1:30pm Pacific Time

Login to the Webinar.*


Ever-growing demand for speed and bandwidth and increasing energy consumption in today’s networks are driving the need for intelligent next-generation networking architectures that can overcome fundamental spectral and energy limitations. Metro-only internet traffic in particular is experiencing unprecedented growth and is projected to exceed long-haul traffic by 40% in 2017; current static peak capacity provisioned networks are ill-equipped to address such “bursty” traffic patterns. Dynamic optical networking, where bandwidth is allocated on-demand in the physical layer in response to changing traffic demands and network conditions, is a promising solution to address these challenges. Rapidly changing network configurations, however, cause unpredictable transmission impairments and result in network instability. Real-time awareness of the state of the physical layer is necessary for managing signal quality and reliability in a dynamic network and can be achieved through ubiquitous distribution of advanced optical performance monitors in a network.

Delay-line-interferometer (DLI) based optical-signal-to-noise (OSNR) monitor is a good candidate for ubiquitous monitoring as it is cost-effective and supports multiple advanced modulation formats. Its greatest drawback is that its measurements are modulation-format and bit-rate dependent, rendering it ineffective in future networks operating in a mixed line rate and modulation formats framework. In our recent work we demonstrated that by using pilot-tones, modulation-format and bit-rate awareness is realized in the monitor. Autonomous signal quality decisions, even in presence of modulation-dependent cross-talk, is achieved facilitating scalable cross-layer impairment aware routing.



Atiyah Ahsan
Ph.D. Candidate
CIAN Graduate Student
Columbia University

Atiyah Ahsan received the B.Sc. degree in electrical engineering (summa cum laude, thesis with highest honors) from Tufts University, Boston and the M.Sc. degree from Columbia University, New York in 2010 and 2012 respectively. From May 2012 to January 2013, she worked as a student collaborator on a project led by Dr. Daniel Kilper at Bell Labs Alcatel Lucent. She is currently a Ph.D. candidate at the Columbia University Lightwave Research Laboratory under the advisement of Professor Keren Bergman. Her research is focused on advanced optical performance monitoring techniques and cross-layer architectures for next-generation dynamic access and metro-networks.

*link will not work until date & time of webinar

If you missed Atiyah Ahsan’s talk, see it below!