August 19, 2010
School of Engineering, Bengaluru
 

The optical fiber revolutionized telecommunications, making possible many of the developments we take for granted today. Narinder Singh, a physicist of Indian origin, is widely acknowledged as the father of the optical fiber.
 

Now research in India is helping take this technology forward. Much work in happening, for instance, in WDM or wavelength-division multiplexing, and researchers at Amrita are also contributing.
 

“In WDM, multiple optical carrier signals are multiplexed on a single optical fiber,” explained Dr. P. R. Vaya, who works in this area. “Different wavelengths (colors) of laser light are used to carry different signals.”
 

As Head of Department of Electronics and Communication Engineering at Amrita’s Bengaluru campus, Dr. Vaya serves as a guide to several Ph.D. students. Some of these students are also faculty in the same department.
 

Recently a paper titled An Adoptive Reliable Multipath Routing for WDM Network was published by T. K. Ramesh, one of his students, in collaboration with him, in the International Journal of Computer Sciences and Engineering Systems (IJCSES).
 

“Balancing the load among multiple paths leads to the worst performance in the WDM network,” stated the paper abstract. “It is always best to deliver the entire load on a single optimal path depending upon the current network-wide load status.”
 

“For this case, multiple light paths need to be maintained to provide the choice of selecting the best light path, based on the changing traffic load conditions. In this paper, we propose an adaptive reliable multipath routing (ARMR) protocol.”
 

The duo have also presented the following papers at recent conferences.
 

A proactive and self-regulated protocol for WDM all-optical networks, International Conference on Innovative Research in Engineering and Technology (ICIRET-2010), Park College of Engineering and Technology, Coimbatore, Aug 2010.
 

An efficient algorithm for routing issue in WDM optical networks, NCICT – 2010, New Horizon College of Engineering, Bangalore, May, 2010.
 

With nearly four decades of experience in the area of Semiconductor Devices and Technology, Dr. Vaya has published sixty five journal papers, presented over a hundred papers in conferences and has authored five books. He also has three patents to his credit.
 

A PhD in Electrical Engineering from IIT Madras, Dr Vaya’s research interests are mainly in the design and development of microelectronic and optoelectronic devices, synthesis of compound semiconductors, MBE of III-V compounds, quantum well structures, numerical modeling of photonic devices, surface modifications of III-V compound semiconductors and nano-fabrication.
 

Having started his career as a lecturer in the University of Udaipur, he served as Professor in IIT Madras and also as their Chief Scientific Officer. Dr. Vaya joined the Amrita family in July 2007, when he assumed charge as Professor and Chairperson of ECE Department in Bengaluru.
 

The following two papers were also recently published by him in international journals.
 

Tan Chee Leong and Pukhraj Vaya, Absorptive Optical Bistability in Hybrid Laser Structure, Int. Journal of Communication Technology, June 2010.
 

Ganapathi Hegde, Cyril Prasanna Raj, P. R.Vaya, Implementation of Systolic Array Architecture for Full Search Block Matching Algorithm on FPGA, European Journal of Scientific Research, Vol.33 No.4, pp.606-616 (2009).
 

For the former, Dr. Vaya collaborated with a scholar from School of Photonics Science, Gwangju Institute of Science and Technology (GIST) in Republic of Korea.
 

For the latter, Ganapathi Hegde, his Ph.D. student and faculty in ECE worked with him. The two collaborated with a scientist from the MS Ramaiah School of Advanced Studies, Bengaluru.
 

Amrita congratulates all faculty members on their research achievements.