A talk on Advanced Applications of Lasers in Sciences was conducted at Amrita Vishwa Vidyapeetham, Amritapuri campus, on March 29, 2017. Dr. S. K. Sreenivasan Nair was the resource person.
Venue: N-003 (Ground Floor, Main building)
Dr. S. K. Sreenivasan Nair took his M.Sc. in Physics from Annamalai University in 1987 and M.Tech. in Applied Optics from IIT Delhi in 1991. He was awarded Ph. D. degree for the thesis entitled “Design and Development of High Average Power Diode Pumped Solid State Laser with Frequency Doubled Output” by Bhabha Atomic Research Centre, University of Mumbai, in 2009.
He had worked at the Bio-medical Engineering division of Sree ChitraTirunal Institute for Medical Sciences and Technology, Thiruvananthapuram, during 1986-94 and as a Scientific Officer at Laser and Plasma Technology Division, Bhabha Atomic Research Centre, Mumbai and Raja Ramanna Centre for Advanced Technology, Indore during 1994-2010. He had also served as a Professor at Toc H Institute of Science and Technology, Ernakulam during 2010-2016. He is interested in design, development and testing of Solid State Lasers for various applications and has independently developed laser marker systems, several research lasers including arc lamp pumped and diode pumped Nd: YAG lasers, dye lasers, laser beam analyzer, optical testing devices etc.
The applications of lasers continue to expand ever since its discovery. Many new ideas and recent realizations of new techniques based on old ideas have contributed substantially to the progress in this field. Started with frequency-doubling techniques in external and internal cavities, the realization of reliable cw-parametric oscillators with large output power and the development of tunable narrow-band UV sources have expanded the possible applications of coherent light sources in various branches of science and technology. New sensitive detection techniques for the analysis of small molecular concentrations and the measurement of weak transitions were also realized. Measurement of absolute absorption coefficients with high sensitivity, the minimum detectable absorption coefficient down to 10-14 cm−1 is achieved. An impressive progress has been made in the development of tunable femtosecond lasers and high output powers available for the generation of higher harmonics, wavelengths down to the X-ray region and pulse widths in the attosecond range is achieved. Controlled pulse shaping by liquid crystal arrays allows coherent control of atomic and molecular excitations. Chemical reactions can be influenced and controlled using such laser pulses.