Rajan Jha received the M.Sc. and Ph.D. degreesfrom Indian Institute of Technology (IIT) Delhi,India, in 2001 and 2007, respectively. From 2008 to 2009, he was a Post-Doctoral Researcher at ICFO–The Institute of Photonics Sciences, Barcelona, Spain. He is currently an Assistant Professor of Physics with the School of Basic Sciences, IIT Bhubaneswar, India. He has published more than 60 research articles, including a review article in international journals of repute. His areas of research are optical sensors and devices. He is a member of the Optical Society of America and a Life Member of the Optical Society of India. He was a recipient of the 2015 ICO-ICTP Gallieno Denardo Award, the DAAD Fellowship (2013), and the JSPS Fellowship in 2009. He is a Associate of ICTP, Italy, and the Indian Academy of Sciences, Bangalore. He has been selected as a Member of National Academy of Sciences (MNASc) in 2016.
Photonic Crystal Fiber Sensors: Practising the Principles
Photonic Crystal Fiber (PCF) are at the forefront of new generation fiber optics technology for various application including sensing. A simple and compact modal interferometer for detection of volatile organic compounds, strain, curvature and nano displacement has been studied. These devices consists of stub of large-mode-area PCF spliced with single-mode fibers in different configurations. In the splice regions the voids of the PCF are fully collapsed, thus allowing the coupling and recombination of two or more core mode or core and cladding modes of the PCF. These system are highly stable over time, generally have low temperature sensitivity, and is suitable for measuring broad range of physical and biochemical parameters by monitoring the shift of the interference pattern. These PCF based sensors may open a completely new window for innovative commercial sensor.