This book contains the studies of surface plasmon resonance based fiber optic sensors.Various probe designs for the fiber optic probe have been considered theoretically for the studies. The performance parameters of so designed probes such as sensitivity has been evaluated and compared.It is am important study mostly for graduate students of electrical engineering departments, physics departments and in fiber optic technologies based industries.Dr. Rajneesh Kumar Verma was born in a small village Baragaon of Sitapur District Uttar Pradesh (India). He Received is M.Sc.in Physics Degree from University of Lucknow and Ph.D. Degree from Indian Institute of Technology Delhi.Currently He is working as an assistant Professor of Physics in Central University of Rajasthan (India).