Design and development of SPR-based fiber-optic sensor for the detection of milk adulteration
Food adulteration is a global concern, and developing countries are at serious threat owing to a lack of supervision and laws. Conventional and qualitative detection techniques are limited due to the more sophisticated way of milk adulteration and involve complexity in the processes. In this paper, the surface plasmon resonance (SPR) based fiber-optic sensor for detecting milk adulteration is presented. This kind of sensor is much sensitive to the change in the refractive index of the outer surrounding medium. In our proposed sensor, we utilise the MMF coated with Silver (Ag) metal to enhance the sensor's sensitivity to a greater extent. The SPR sensors offer the possibility of very low concentrations detection of adulterants with real-time monitoring. Prior to conducting experiments, simulations have been carried out to acknowledge the appropriate thickness of the Ag layer required for optimum sensitivity. The result shows that both simulations and experiments met with good agreement.
Indian Institute of Technology (Indian School of Mines), Dhanbad (India)
Sanjeev Kumar Raghuwanshi received the Bachelors degree in electronic and instrumentation engineering from S.G.S.I.T.S. Indore, Madhya Pradesh, India and the Masters degree in Solid State Technology from Indian Institute of Technology, Kharagpur, in Aug. 1999 and Jan. 2002, respectively. Since July 2009, he has been obtained PhD degree in the field of optics from the Department of Electrical Communication Engineering of Indian Institute of Science, Bangalore India. He is an Associate Professor in Electronics Engineering Department of Indian Institute of Technology (ISM) Dhanbad, India. He was the Post-doctoral Research Fellow during 2014-2015 at Instrumentation and Sensor Division, School of Engineering and Mathematical Sciences, City University London, Northampton Square, London. He has published more than 100 peer reviewed and indexed International SCI Journal papers in the last 10 years. He has been published 4 books on contemporary optical fiber domain and 4 Indian patents.