Nanostructured Fibers and Nonlinear Optics
Prof. Siddharth Ramachandran, Electrical & Computer Engineering Department, Boston University
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Principal Investigator: Prof. Siddharth Ramachandran obtained his Ph.D. in Electrical Engineering from the University of Illinois, Urbana-Champaign, in 1998. Thereafter, he joined Bell Laboratories as a Member of Technical Staff and subsequently continued with its spin-off, OFS Laboratories. After a decade in industry, Dr. Ramachandran moved back to academics in 2010, and is currently a Professor in the department of Electrical and Computer Engineering at Boston University. Dr. Ramachandran’s research focuses on the optical physics of guided waves and their applications to photonic devices. For his contributions in the field of fiber-optics, he was named a Distinguished Member of Technical Staff at OFS Labs in 2003, a fellow of the Optical Society (OSA) in 2010, and the IEEE Distinguished Lecturer for the term 2013-2014. He is currently an associate editor for the IEEE Journal of Quantum Electronics, has previously served as a topcial editor of Optics Letters (2008-2011) and as the chair for the 2011 OSA Nick Holonyak Award committee. In addition, he has served on numerous conference and grant-review committees in the field of optics and applied physics.

Click here for CV ; Email: sidr at bu dot edu; Tel: +1-617-353-9881

Postdoctoral Research Scientists  
  • Dr. Michael Grogan completed his studies at the University of Bath, UK in 2011, shortly before joining the group. His Ph.D. focused on integrating aerogel, a unique low-density form of silica glass, with fiber optics to exploit their mechanical and optical properties. His continuing research interests are material integration for optical fibers.
  • Dr. Paul Steinvurzel completed his undergraduate studies in 2000 in Applied Physics at Columbia University. He then joined the fiber gratings group at Bell Laboraties, later spun off as OFS labs, where he carried out research on tunable fiber devices.  He left to pursue a Ph.D in Physics at the University of Sydney, completed in 2007, where his thesis covered theory and experimental work on solid core photonic bandgap fibers.  Dr. Steinvurzel returned to the US for a postdoctoral fellowship at Harvard, with a research focus on near field optics, surface plasmons, and Si nanowire waveguides, with applications in photodetection and integrated microfluidic biosensing.  He joined Prof. Ramachandran's group in October 2010 and his current research interests are in waveguide engineering, photonic nanostructures, and device integration.
Graduate Students  
  • Jeff Demas received his B.S. in Optical Engineering from the University of Rochester in 2011. Following graduation he began his PhD studies at Boston University and the joined the Nanostructured Fibers and Nonlinear Optics group in October of 2011. His current research focuses on high-power laser development and nonlinear optics with fibers. 
  • Patrick Gregg received his B.S. in Optics and B.A. in Physics and Japanese Language at the University of Rochester in 2011. He entered the ECE program at Boston University and joined the Ramachandran group in January of 2012. His current research interests include the generation, transmission through fiber, and detection of higher order optical orbital angular momentum states.
  • Boyin Tai received his B.S. in opto-electronics and M.E. in optical engineering from Nankai University, China, in 2008 and 2011 respectively. He was admitted to the ECE department at Boston University to pursue his Ph.D. in 2011 and joined the Nanostructured Fibers and Nonlinear Optics group in May of 2012. His current research concentrates on novel dispersion control mechanisms and devices using optical fibers.
  • Lu Yan obtained his B.S.in Applied Physics and M.S. in Physics from Beijing University of Aeronautics and Astronautics, China, in 2007 and 2010 respectively. His M.S. thesis focused on investigations of rare-earth doped glasses and thin-film materials, and their applications in integrated optical waveguide gyroscopes. He came to Boston University to pursue his Ph.D in 2010, and joined the Nanostructured Fibers and Nonlinear Optics group in June of 2011. His current research is on the use of OAM modes in optical fibers for developing next generation nanoscale microscopy systems.
  • Roman Barankov graduated with an MS in Electrical Engineering from the Ramachandran group in May 2012. His thesis work was on modal characterisation techniques. Prior to coming to BU, Roman got a Ph.D. in Physics from MIT in 2006, working on the non-linear dynamics of quantum many-body systems. He now works as a postdoctoral fellow in the biomedical imaging group of BU.

  • Nenad Bozinovic graduated with a PhD in Electrical Engineering from the Ramachandran group in May 2013. Prior to joining Prof. Ramachandran's group, Nenad held a MS degree in Electrical Engineering from BU, as well as MS and BS degrees in Physics, from Belgrade University. His thesis work focused on the control, manipulation and stability of orbital angular momentum (OAM) states of light in optical fibers, and a highlight of his thesis work was the first demonstration of a mode-division multiplexed data transmission system that did not require MIMO signal processing - this work was published in the journal Science. After graduation, Nenad joined Nistica Inc., a wholly owned subsidiary of Fujikara Ltd. in New Jersey, USA, as a research staff member.
  • Yuhao Chen graduated with a MS in Electrical Engineering from the Ramachandran group. Previously, he held a B.A.Sc in Electrical Engineering from the University of Ottawa. During his tenure in the group, Yuha participated in several projects related to the excitation, propagation and manipulation of Bessel beams in fiber, as well as fiber designs and fiber-grating fabrication. He has now returned to Singapore as a Program Manager of ....
Past Visitors  
  • Lars Rishoj obtained his B.Sc. and M.Sc. in Applied Physics from the Technical University of Denmark in 2006 and 2009, respectively. Subsequently, he joined the group “Fiber Optics, Devices & Nonlinear Effects” at DTU Fotonik – Department of Photonics Engineering as a Ph.D. student. The aim of his project is to develop a fiber laser with a wavelength of around 780 nm. During his visit to BU, as part of his PhD, he studied intermodal nonlinearities in optical fibers.
  • Dr. Damian N Schimpf obtained the Diploma and the Ph.D. degree in physics from the Friedrich Schiller University, Jena, Germany, in 2005 and 2010, respectively. He came to Boston University in the summer of 2010 for a year-long postdoctoral position in Prof. Ramachandran's group. During his visit, he worked on fiber charachterisation techniques using low coherence interferometry. Following his position at BU, Damian moved to MIT for a postdoctoral position in the area of ultrafast lasers, and he is now a research staff membe for the Deutsches Elektronen-Synchrotron in Hamburg, Germany.
  • Masao Goto obtained his Bachelors of Science in 1999, and Masters of Science in 2001, in the division of Physics and Astronomy at Kyoto University, Japan. He then joined the Japan Patent Office, where he has examined many patent applications relating to optical fibers(e.g. dispersion shifted fibers, fiber gratings and photonic crystal fibers). During his year-long visit to Boston University, Masao worked on fiber grating fabrication and charaterization in photonic crystal fibers.
  • Prof. Karsten Rottwitt is a professor in the Institut for Fotonik, at the Danish Technical University, in Lyngby, Denmark. He is an expert in the field of fiber telecommunications and in the study of Raman scattering and their applications in optical fibers. After obaining his PhD in 1993, Dr. Rottwitt's career has taken him across the globe as well as industry and academia, including the Imperial College, London, the Niels Bohr Institute, and several years at Bell labs, before returning to Denmark in his current permanent position.



Post-doctoral fellowships and research scientist positions are available in the Nanostructured Fibers and Nonlinear Optics Lab. If you are interested, contact Prof. Ramachandran by email with a copy of your resume/CV and a 1-page description of your research activities and accomplishments. Students already admitted to BU are welcome to email Prof. Ramachandran for an appointment to discuss potential Masters and PhD topics.