Lecture at City University from Dr Siddharth Ramachandran, 5pm 8th June 2015

Singular light in fibers: Beams that can do what Gaussians cannot
Siddharth Ramachandran
ECE Department & Photonics Center, Boston University, Boston, MA, USA
sidr@bu.edu; http://people.bu.edu/sidr; +1-617-353-9881

Gaussian beams are the ground-state solution for light in any optical system, and are the desired state for many systems such as laser cavities and optical fibers. On the other hand, spatially complex beams of light, possessing phase- or polarisation-singularities, display several intriguing phenomena such as enhanced propagation stability, the ability to self-heal, or carry orbital-angular-momentum. This talk will introduce their physics of operation, and describe the utility of generating and propagating them in fibers, for applications ranging from high-power lasers and nano-scale imaging, to scaling the capacity of optical networks.

Dr 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 now a Professor in the Department of Electrical Engineering at Boston University. Prof. Ramachandran’s research focuses on the optical physics of guided waves. He has authored over 200 refereed journal and conference publications, more than 50 invited talks, plenary lectures and tutorials, 3 book-chapters, edited one book, and has been granted 37 patents. 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 an IEEE Distinguished Lecturer for 2013-2015. He served as a topical editor for Optics Letters from 2008-2011 and associate editor for IEEE Journal of Quantum Electronics from 2011-2014, in addition to serving on numerous conference and advisory committees in the field of optics and applied physics, including as program chair for CLEO-2015.
Location: City University London, Centenary Building, Birley Lecture Theatre, EC1V 0HB
Date and Time: Monday, 8th June, 2015. Lecture from 5 pm to 6 pm
Coffees: Drysdale Building, Seating areas, from 4:30 pm to 5 pm.
Contact: Prof. B M A Rahman, City University London, Email: B.M.A.Rahman@city.ac.uk 079 29 6262 23
Nearest Tube station: Angel, Northern Line (Bank branch)

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