Dr. Prita Nair

physics_pritanairAssociate Professor
Dr. Prita Nair M.Sc., Ph.D

Email: pritanair@ssn.edu.in

 

Dr. Prita Nair, received her M.Sc Physics degree from Cochin University of Science & Technology (CUSAT), Kerala, and Ph.D degree from Indian Institute of Technology, Madras (IIT-M) for the thesis titled “Optical Fiber Amplifiers and Lasers”. She was a National-Merit-Scholarship holder until her post graduation, a University II rank holder in MSc , and the recipient of Laskar Award for the best thesis in Physics from IIT Madras in 1997.

Her teaching tenure spans a period of  10 years during which she has handled courses on Engineering Physics, semiconductor Physics & Optoelectronics, Electronic Devices & Circuits, Linear Integrated Circuits, Electronic Circuits for undergraduates and Optical Fiber Communication for M.E Communications.
Dr. Nair is a registered Research Supervisor of Anna University and Bharatidasan University. She has over 34 publications to her credit, and 9 years of  R&D experience experience in optical fiber components and systems, initially as a Research Assistant and subsequently as Senior Project Officer executing projects for defense sector( Aeronautical Research and Development Board, Govt. Of India) and  the private telecom  sector and more recently as Principal Investigator in sponsored projects. She has been instrumental in setting up the Optical Research & Networks Lab which is an interdisciplinary research lab between Physics and Electronics & Communication Engineering departments and the Ultrasonic lab in the Physical Sciences Research Centre. On the basis of the work carried out by her team on reconfigurable optical components, SSN College of Engineering was invited to be a National MEMS Design Centre sponsored through National Program on Micro and Smart Systems (NPMASS).
She is a Member of IEEE, ISTE and Member of IEEE Photonics Society. Dr Nair’s research interests cover optical fiber components and sensors photonic and phononic bandgap materials and metamaterials

Sponsored Projects (as Principal Investigator)
 I.”Reconfigurable Optical Components Based On Photonic Bandgap Structures”
Sponsor: Funds Allocated: Duration: Status
SSN Charitable Trust Rs.20.00 lakhs 4 years Ongoing
SummaryPhotonic bandgap structures are periodic structures that can be tailored to forbid transmission of photons of specific frequency bands. These stop bands are called photonic bandgaps. Any break in the periodicity of the structure can lead to additional tailoring of the bandgap leading to many unique applications. This novel way to control electromagnetic radiations is an emerging technology that can be exploited to develop dynamically reconfigurable network elements have now become a necessity to cater to the bandwidth-on-demand applications like IPTV. This project aims to develop dynamically reconfigurable components for the telecom sector based on photonic bandgap crystals or structures (PhC/PBS). The main deliverables of this research project are (i)one dimensional PBS on silicon for application as low loss ROADMs for metro networks, (ii) tunable optical delays for application in OTDM’s and as memory buffers in optical packet switching (GMPLS) environments, (iii) wavelength converters using 2D photonic bandgap structures .
II. “Reconfigurable Wavelength Selective Filters Using One Dimensional Photonic Bandgap Structures In Silicon for ROADM Applications”
Sponsor: Funds Allocated: Duration: Status
AICTE Rs.15.00 lakhs 2 years completed
SummaryDesign, virtual prototyping and anlaysis of MEMS based electrostatically tunable wavelength selective filters using  photonic bandgap in silicon/Air structures (PBS)  have been carried out using Intellisuite MEMS CAD tool for  ensuring effective dynamic reconfiguration of passband characteristics for application as ROADMs in CWDM metro networks. These devices have been designed to meet  target specifications  of   adding/dropping CWDM channels in C band + supervisory channel in L  (i) passband per drop wavelength: ≤4nm (ii) insertion loss ≤ 5 dB (iii)extinction ratio >10dB (iv) temperature drift : ≤ 0 .15nm/ º C. Fixed filters using anisotropic wet etching of 110 Si wafers and its experimental characterization shows reasonable agreement between virtual prototype and actual device pointing towards a successful end product with all the simulated characteristics
III.”Investigation of Materials in Sonic Band Gap Structures for possible use in stealth applications ( PI: Dr. Prita Nair, Dept. of Physics, SSN College of Engg, Chennai)
Sponsor: Funds Allocated: Duration: Status
Naval Research Board Rs.13.61 lakhs 2 years Completed
SummaryID and 2D sonic bandgap structures have been theoretically modeled using transfer matrix method and finite difference time domain methods. 1D structures using Al/water, Glass/water, Perspex /water has been experimentally studied and good agreement was obtained with the  predictions using theoretical models. Critical parameters for which strict manufacturing tolerances have to be maintained for ensuring the desired performance has been identified. Wavelength filters, waveguides and sonic lenses are some of the devices that have been realized experimentally. Sub-wavelength structures for the low frequency range (5kHz-20kHz) has also been realized using cascaded Helmoltz oscillators. Genertic algorithm for reverse engineering the structure starting from an initial trial population has also been developed.
Invited Talks delivered:
1·”Integrated Optics Devices for Agile Optical Networks- Part I and Part II”  on 1st March 2011, in the faculty Development Program on “Photonic Devices and Materials” held at National Institute of Technology(NIT), Calicut.
2.”Acoustic Signal Processing using Sonic Bandgap Structures” on 28th February 2009, National Workshop on “Application Technology and  Research Trends in Underwater Communication” organized jointly by Dept. of ECE, SSN College of Engineering and NIOT, Pallikkarnai.
3 “Enabling Technologies for Intelligent Optical Networks” on 19th May 2008, Workshop on “Communication Technologies and Evolution towards Intelligent Network Architecture ” organized by Dept. of ECE, SSN College of Engineering and AICTE- ISTE
4 “Recent trends in Optical Networking” on 12th March 2005, Dept. of ECE, Madras Institute of Technology, Chrompet
5 “Applications of NLO crystals” on 16th December 2005, National Workshop on “Recent Trends in Crystal Growth and Characterisation” organized by Crystal Growth Centre, SSN College of Engineering