Prof. Ravindra Kumar Sinha is the Director of the CSIR-Central Scientific Instruments Organisation (CSIR-CSIO) Sector-30C, Chandigarh-160 030, India & presently on lien from the post of Professor - Applied Physics & Chief Coordinator: TIFAC-Center of Relevance and Excellence in Fiber Optics and Optical Communication, Mission REACH Program, Technology Vision-2020, Govt. of India Delhi Technological University (formerly Delhi College of Engineering, University of Delhi) Bawana Road, Delhi-110042, India.