Lightwave Research Laboratory Research Group

Faculty

Professor Keren Bergman

Ph.D. Students

Nathan Abrams
Meisam Bahadori
David Calhoun
Christine Chen
Sasha Gazman
Hang Guan
Yishen Huang
Ari Novack
Yiwen Shen
Ke Wen

Research Scientists

Dr. Sebastien Rumley

Post-Doctoral Researchers

Dr. Zahra Bakhtiari
Dr. Dessislava Nikolova
Dr. Robert Polster
Dr. Payman Samadi

Visiting Scholars

Dr. Colm Browning
Haoran Chen
Dr. Noam Ophir
Dr. Vidak Vujicic

Master's and Undergraduate Researchers

Maarten Hattink
Nazli Tuncer
Ziyi Zhu

 



Professor Keren Bergman (Principal Investigator)

Email: 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)

Email: rumley [at] ee.columbia [dot] 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 focuses on optical interconnect modeling, mainly for applications in High-Performance Computing and Distributed Computing platforms.


Dr. Zahra Bakhtiari (Post-Doctoral Researcher)

Email: zb2209 [at] columbia [dot] edu

Office: 804 CEPSR

Phone: 212-854-5874

Fax: 212-854-2900


Zahra Bakhtiari received her B.S. and M.S. degrees in electrical engineering (telecommunications) from Shiraz University and Sharif University of Technology. She received her PhD in Optical Communications Systems from University of Southern California, Los Angeles. Her research focuses on High Performance Computing, Systems Modeling and Optical Signal Processing for multilevel modulation formats.


Dr. Dessislava Nikolova (Post-Doctoral Researcher)

Email: dnn2108 [at] columbia [dot] edu

Office: 806 CEPSR

Phone: 212-854-8068

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. Her current research interests are designing, modelling and demonstrating silicon photonic systems for optical interconnects, switches and quantum communication.


Dr. Robert Polster (Post-Doctoral Researcher)

Email: rpp2130 [at] columbia [dot] edu

Office: 821 CEPSR

Phone: 212-854-5946

Fax: 212-854-2900


Robert Polster received his Ph.D. from the Université Paris Sud in 2015 for his research on silicon photonic links that was carried out at the CEA-LETI in Grenoble, France. He received his M.S. degree in physics from the Humboldt University, Berlin, Germany in 2012. His Master thesis was carried out at the Institute for Quantum Optics and Quantum Information Theory (IQOQI) in Vienna from 2011-2012. He carried out further studies at the Paul-Scherrer-Institut / ETH Zurich and in the high field laser laboratory of the Max-Born-Institute in Berlin from 2006-2009. His current research interest is silicon photonic links.


Dr. Payman Samadi (Post-Doctoral Researcher)

Email: ps2805 [at] columbia [dot] edu

Office: 806 Shapiro CEPSR

Phone: 212-854-8068

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.


Nathan Abrams (Ph.D. Candidate)

Email: nca2123 [at] columbia [dot] 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.


Meisam Bahadori (Ph.D. Candidate)

Email: mb3875 [at] columbia [dot] edu

Office: 821 CEPSR

Phone: 212-854-5946

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.


Dr. Colm Browning (Visiting Scholar)

Email: colm.browning [at] dcu [dot] ie

Office: 806 CEPSR

Phone: 212-854-8068

Fax: 212-854-2900


Colm Browning graduated from Trinity College Dublin in 2009 with an honors degree in electronic engineering (BAI) and a minor in Mathematics (BA). Colm completed his Ph.D, entitled 'Orthogonal Frequency Division Multiplexing for Next Generation Optical Networks', in September 2013, in the Radio and Optical Communications Lab at Dublin City University.
Since then, Colm has worked as a post-doctoral researcher at DCU, investigating the use of advanced modulation formats in future optical networks. He has conducted research at Monash University, Melbourne, Australia, having received a Science Foundation Ireland travel fellowship, and also at IIT Madras, Chennai, India as part of an EU Marie Curie exchange program.In 2014 Colm was awarded a Fulbright TechImpact award allowing him to join the Lightwave Research Laboratory at Columbia University, New York to investigate the use of nanosecond optical switching in optical networks and data centers.


David Calhoun (Ph.D. Candidate)

Email: dmc2202 [at] columbia [dot] 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.


Christine Chen (Ph.D. Candidate)

Email: cpc2143 [at] columbia [dot] 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.


Haoran Chen (Visiting Scholar)

Email: hc2886 [at] columbia [dot] edu

Office: 808 Schapiro CEPSR

Phone: 212-854-3105

Fax: 212-854-2900


Haoran Chen received his B.S. in Electrical Engineering from Beijing University of Posts and Telecommunicaitons in Beijing, China, in 2011. From 2011 to 2015, he worked towards a Ph.D. degree at the same school. He is now a visiting scholar at Columbia University, and his interests include optical network optimization, software defined networking, and data center optical interconnects.


Sasha Gazman (Ph.D. Candidate)

Email: ag3529 [at] columbia [dot] edu

Office: 821 CEPSR

Phone: 212-854-5946

Fax: 212-854-2900


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.


Hang Guan (Ph.D. Candidate)

Email: hg2388 [at] columbia [dot] edu

Office: 804 CEPSR

Phone: 212-854-5874

Fax: 212-854-2900


Hang Guan received his B.S. in Electrical and Computer Engineering from University of Electronic Science and Technology of China in 2012 and his M.S. from National University of Singapore in 2014. He is currently pursuing his Ph.D. at Columbia University, with interests in novel silicon photonic devices and systems.


Yishen Huang (Ph.D. Candidate)

Email: yh2785 [at] columbia [dot] edu

Office: 803 CEPSR

Phone: 212-854-5348

Fax: 212-854-2900


Yishen received his B.S. degree in Engineering Physics from Queen’s University in Kingston, Canada in 2015 as a Chancellor's Scholar and a Dean’s Scholar. He completed internships with Ciena Networks and IBM prior to joining Lightwave Research Laboratory. Currently he is pursuing his M.S. and Ph.D at Columbia University, with interests in optical interconnects for High-Performance Computing.


Ari Novack (Ph.D. Candidate)

Email: ajn2137 [at] columbia [dot] edu

Office: 803 CEPSR

Phone: 212-854-5348

Fax: 212-854-2900


Ari Novack received a B.S. in Engineering and a B.A. in Physics from Swarthmore College in 2012. He studied at the National University of Singapore through 2014 before moving to Columbia University to pursue a Ph.D. His research interest is integrated silicon photonics including the germanium photodetector.


Dr. Noam Ophir (Visiting Scholar)

Email: no2180 [at] columbia [dot] 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.


Yiwen Shen (Ph.D. Candidate)

Email: ys2799 [at] columbia [dot] edu

Office: 821 CEPSR

Phone: 212-854-5946

Fax: 212-854-2900


Yiwen Shen received his B.Sc. degree from the University of Toronto in 2014 in Electrical Engineering. During 2013-2014 he undertook research projects relating to the fabrication of femtosecond laser-written lab-in-fiber devices for sensing applications. He is currently working towards a M.Sc. degree at Columbia University with a focus on optical interconnects and software defined networking with applications in data centers networks.


Dr. Vidak Vujicic (Visiting Scholar)

Email: vidak.vujicic [at] dcu [dot] ie

Office: 806 CEPSR

Phone: 212-854-8068

Fax: 212-854-2900


Vidak Vujicic graduated from the School of Electronic Engineering, University of Belgrade, Serbia with a Bachelor degree in Electronics in 2009 (First Class Honours) and an Masters degree in Nanoelectronics, Optoelectronics and Laser Techniques in 2010 (First Class Honours). During 2011 he worked as a research assistant at Instituto Superior Tecnico, Technical University of Lisbon, Portugal. He joined Dublin City University (DCU), Ireland in 2012, where he obtained his Ph.D degree in 2015. His PhD research has been focused on high capacity and spectrally efficient optical (transport) systems, networks and data centres. During his PhD he was a visiting research engineer at CERN (Geneva, Switzerland) where he worked on modeling and hardware development (FPGA transceiver prototyping) of PONs.
He is currently a Post-Doctoral researcher at DCU. The main areas he is currently working on are design of a optical systems for data centers and development of FPGA based transceiver for data center applications ("Big Pipes" project) and fast-switching tunable lasers for data centers (CIAN project).


Ke Wen (Ph.D. Candidate)

Email: kw2501 [at] columbia [dot] 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.


Maarten Hattink (Master's Researcher)

Email: mh3654 [at] columbia [dot] edu


Maarten Hattink received his B.Sc in Electrical Engineering from the Eindhoven University of Technology, Netherlands, in 2015. He is currently working towards a M.Sc degree at the same university. As a part of this program he is doing an internship at Columbia University. His interests are in optical networks and embedded systems. Also has 2 years of experience in (embedded) software and FPGA development from a part time job at a company besides his education.


Nazli Tuncer (Undergraduate)

Email: nt2320 [at] columbia [dot] edu


Nazli is an undergraduate majoring in Electrical Engineering and minoring in Computer Science at Columbia University. She previously interned at Dell working on Alienware and dock ecosystem products. Her current research interests include silicon photonics for switches and optical interconnects.


Ziyi Zhu (Master's Researcher)

Email: zz2374 [at] columbia [dot] edu


Ziyi Zhu received his B.S. in Electrical Engineering and graduated with honors from Sichuan University in Chengdu, China, in 2015. He worked in Photonics Research Laboratory during 2014 – 2015, undertaking research project on interaction between pulse laser and materials. Currently, he is working towards a M.S. degree at Columbia University with interests in developing and testing optical switches and FPGA controlled optical interconnects.