Lightwave Research Laboratory Research Group

Faculty

Professor Keren Bergman

Ph.D. Students

Nathan Abrams
Atiyah Ahsan
Meisam Bahadori
David Calhoun
Cathy Chen
Christine Chen
Sasha Gazman
Robert Hendry
Qi Li
Ron Lidor
Kishore Padmaraju
Michael Wang
Ke Wen
Junjie Xu
Lee Zhu

Research Scientists

Dr. Sebastien Rumley

Post-Doctoral Researchers

Dr. Dessislava Nikolova
Dr. Payman Samadi

Visiting Scholars

Dr. Noam Ophir

Master's and Undergraduate Researchers

Yumeng Xu

 



Professor Keren Bergman (Principal Investigator)

bergman@ee.columbia.edu

Office: 1300 Mudd

Phone: 212-854-2280

Fax: 212-854-2900


Keren Bergman is the primary investigator of the Lightwave Research Laboratory and the Charles Batchelor Professor of Electrical Engineering of Columbia University in the City of New York


Dr. Sebastien Rumley (Research Scientist)

sr3061@columbia.edu

Office: 806 CEPSR

Phone: 212-854-8068

Fax: 212-854-2900


Sébastien Rumley received his M.S. degree in telecommunications engineering from the Ecole Polytechnique Fédérale de Lausanne (EPFL) in 2005, after graduate studies in Lausanne, Zurich and Santiago de Chile (PUC). He received PhD degree in 2011 from the EPFL, where he worked as research assistant at the Telecommunications Laboratory between 2006 and 2011. His research focus on optical network design, modelling and optimization, on one hand, and on software improving the research process, on the other hand. He collaborated in the COST actions 285 and 291


Nathan Abrams (Ph.D. Candidate)

nca2123@columbia.edu

Office: 803 CEPSR

Phone: 212-854-5348

Fax: 212-854-2900


Nathan Abrams received both his B.S. in Electrical Engineering from Columbia University in 2014 and his B.A. in Natural Mathematics and Sciences from Whitman College in Walla Walla, WA in 2014. He is currently working towards his M.S. and Ph.D at Columbia University, with research interests relating to photonic devices.


Atiyah Ahsan (Ph.D. Candidate)

asa2157@columbia.edu

Office: 815 Shapiro CEPSR

Phone: 212-854-3109

Fax: 212-854-2900


Atiyah Ahsan received her B.S. in electrical engineering from Tufts University, Boston, MA in 2010. She is currently working towards her M.S. and Ph.D at Columbia University. Her research interests are optical packet switching, optical performance monitoring and energy efficient optical networks.


Meisam Bahadori (Ph.D. Candidate)

mb3875@columbia.edu

Fax: 212-854-2900


Meisam Bahadori received his B.S. degree in electrical engineering, majoring in Telecommunications, from Sharif University of Technology in 2011. After that, he worked towards M.S. degree in electrical engineering, majoring in Microwaves and Optics, at the same school and graduated with the highest honors in June 2013. From September 2011 to August 2014, he was a research assistant at the Integrated Photonics Laboratory, where he studied the theory of propagation of light in metallic nanostructures and plasmonic devices. He is currently pursuing a PhD in electrical engineering with research interests related to photonics and optical devices.


David Calhoun (Ph.D. Candidate)

dmc2202@columbia.edu

Office: 804 CEPSR

Phone: 212-854-5874

Fax: 212-854-2900


David Calhoun received his B.S. in Electrical and Computer Engineering (Summa Cum Laude) from Rowan University in Glassboro, NJ in May 2012. He is currently pursuing his M.S. and Ph.D. at Columbia University, with interests in novel silicon photonic devices and optical interconnects.


Cathy Chen (Ph.D. Candidate)

cache@ee.columbia.edu

Office: 815 Schapiro CEPSR

Phone: 212-854-3109

Fax: 212-854-2900


Cathy Chen received her BS in Electrical and Computer Engineering, with a minor in Asian Studies from Cornell University in Ithaca, NY in 2009, and her MS and M.Phil in Electrical Engineering from Columbia University in New York, NY in 2011 and 2013 respectively. She is a recipient of the SEAS Grossman Scholarship as well as the Wei Family Foundation Scholarship. Her current research interests are next generation optical networks for data centers and FPGA development of optical network interface hardware.


Christine Chen (Ph.D. Candidate)

cpc2143@columbia.edu

Office: 804 Shapiro CEPSR

Phone: 212-854-5874

Fax: 212-854-2900


Christine Chen received her B.S. in Electrical Engineering and Computer Sciences along with a minor in East Asian Languages and Cultures from the University of California, Berkeley in May 2011. She also worked for the university’s newspaper, The Daily Californian. She is currently studying towards her M.S. and Ph.D. at Columbia University, with her research focus being in the area of silicon photonics for optical interconnection networks and high-performance computing systems.


Sasha Gazman (Ph.D. Candidate)

ag3529@columbia.edu


Sasha Gazman received his BS in Electrical Engineering with concentration in Nanotechnology from Boston University in May 2013. He is the recipient of the P. T. Hsu Memorial Award for senior design project. After graduation he worked at MC10 and Fromlabs working on medical sensors and 3D printers. His current research interests are optical networks for data centers and FPGA development of optical network interface hardware.


Robert Hendry (Ph.D. Candidate)

rh2519@columbia.edu

Office: 817 Shapiro CEPSR

Phone: 212-854-0336

Fax: 212-854-2900


Robert Hendry received a B.S. in computer science from Hobart College in Geneva, NY, in 2010. He is currently working towards a M.S. and Ph.D. at Columbia University, pursuing research in optical interconnection networks for chip multiprocessor architectures.


Qi Li (Ph.D. Candidate)

ql2163@columbia.edu

Office: 803 Schapiro CEPSR

Phone: 212-854-5348

Fax: 212-854-2900


Qi Li received his B.Eng in Electrical and Computer Engineering (First Class Honour), with a minor in Mathematics from the Hong Kong University of Science and Technology in 2010, and a M.S. in Electrical Engineering from Columbia University in 2012. In 2010 spring he was an exchange student at Cornell University. His research interests include silicon photonics and optical interconnects.


Ron Lidor (Ph.D. Candidate)

rl2505@columbia.edu

Fax: 212-854-2900


Ron Lidor served in the U.S. Navy from 2001 to 2007. He received his B.S. in Electrical Engineering from Rutgers University in East Brunswick, NJ in May 2009. He earned his M.S. in Electrical Engineering from Columbia University in October 2010. He worked as an RF Design Engineer from 2010 to 2014, designing frequency converters, LNA's and SSPA's. He is currently a Ph.D. candidate at Columbia University, where his research interests include photonic devices and optical interconnects.


Dr. Dessislava Nikolova (Post-Doctoral Researcher)

dnn2108@columbia.edu

Office: 817 CEPSR

Phone: 212-854-0336

Fax: 212-854-2900


Dessislava Nikolova has a M.Sc. degree in Solid State Physics from Sofia University, Bulgaria and a PhD in Computer Science from University of Antwerp, Belgium. She has spent two years as a research engineer in optical access networks with Alcatel working on scheduling algorithms for passive optical networks. After obtaining her PhD she was awarded a Marie-Curie Fellowship to study the interaction between magnetism and plasmonics on the nanoscale at the London Center for Nanotechnology at University College London. Her current research will focus on the design and analysis of on-chip silicon photonic networks combining high level network design principles with fundamental physics theory.


Dr. Noam Ophir (Visiting Scholar)

no2180@columbia.edu

Fax: 212-854-2900


Noam Ophir received a B.Sc. with a concentration in Math & Physics from Hebrew University in 2002 and an M.Sc. in Electrical Engineering from Tel Aviv University in 2006. He worked as a communications and signal processing engineer for I.N., Israel from 2002-2008. He received his Ph.D. in Electrical Engineering from Columbia University in 2013. His research interests include silicon photonic devices and wave propagation in stochastic media. His current focus is on broadband all-optical signal manipulation in silicon-photonic devices.


Kishore Padmaraju (Ph.D. Candidate)

kp2362@columbia.edu

Fax: 212-854-2900


Kishore Padmaraju graduated from the University of Rochester with a B.S. in Electrical & Computer Engineering as well as a B.S. in Physics in 2009, and a M.S. in Electrical Engineering from Columbia University in 2011. He is a recipient of an IBM/SRC Ph.D. fellowship. His research interests include advanced modulation formats, thermo-optic effects, and control systems for silicon photonic platforms.


Dr. Payman Samadi (Post-Doctoral Researcher)

ps2805@columbia.edu

Office: 817 Shapiro CEPSR

Phone: 212-854-0336

Fax: 212-854-2900


Payman Samadi received his B.S. and M.S. in Electrical Engineering from Shahid Beheshti University and University of Windsor in 2005 and 2007. He received his Ph.D. in Photonics from McGill University in 2012. He worked as a product manager at Optiwave Systems Inc. from 2011-2013. His research interests include optical signal processing, system modeling, silicon photonics, and optical interconnects.


Michael Wang (Ph.D. Candidate)

msw2138@columbia.edu

Office: 817 Schapiro CEPSR

Phone: 212-854-0336

Fax: 212-854-2900


Michael Wang graduated from Princeton University in 2008 with a BSE in Electrical Engineering (cum laude) and a Certificate Program in Finance. During his undergraduate years, his research interests included computer architecture and computer security. Currently, his research interests include architectures for photonic interconnection networks and parallel programming for high performance computing applications.


Ke Wen (Ph.D. Candidate)

kw2501@columbia.edu

Office: 804 CEPSR

Phone: 212-854-5874

Fax: 212-854-2900


Ke Wen received his B.S. in Electrical Engineering from Tsinghua University in Beijing, China, in 2010. From 2010 to 2012, he was a graduate student in Electrical and Computer Engineering in University of California, Davis. He is currently working towards a Ph.D. at Columbia University, pursuing research in optical interconnection networks for high-performance computing systems.


Junjie Xu (Ph.D. Candidate)

jx2236@columbia.edu

Office: 803 CEPSR

Phone: 212-854-5348

Fax: 212-854-2900


Junjie Xu (Jack) received his B.S. in Computer Engineering (Summa Cum Laude) from University of Texas at Dallas (UTD) in Richardson, TX in May 2014. His undergraduate research was in the Open Networking Advanced Research Laboratory at UTD with a focus on Software Defined Networking (SDN) for Network Mobility. He is currently studying towards his M.S. and Ph.D. at Columbia University, and his current research interests remain in the area of SDN, specifically in its application for the next generation data center network architecture.


Lee Zhu (Ph.D. Candidate)

xz2237@columbia.edu

Office: 815 Shapiro CEPSR

Phone: 212-854-3109

Fax: 212-854-2900


Lee Zhu received his B.S. degree in Electrical Engineering from Caltech in 2006. From 2006 until 2009 he worked for Microsoft in Seattle WA, doing software development and test within the Content and Access Protection group. His current research interests are silicon photonic devices and optical interconnection networks.


Yumeng Xu (Master's Researcher)

yx2239@columbia.edu

Office: 803 CEPSR

Phone: 212-854-5348

Fax: 212-854-2900


Yumeng Xu received his B.S. in Electrical Engineering from University of Electronic Science and Technology of China, in June 2013. He is currently a MS candidate in Electrical Engineering at Columbia, Tesla Scholar, and research assistant. His research interests are in digital circuit designing and FPGA-based photonics switch systems.