Design of a Wideband Signal Processor for Interferometric Optical Fiber Strain Gauge

Abstract

A wideband signal processor to extract vital information from an interferometric-type optical fiber strain gauge was designed and implemented. Necessary spectral representation tor the photodetector output of a two-channel strain sensor is derived. A signal processor with 80 dB dynamic range and having linear frequency response from DC upto 10kHz was developed. User adjustable threshold limits for both amplitude and frequency of strain signal was incorporated in the hardware.

Additional information

Notes on contributors

K P M Bhat

K P M Bhat was born in 1956 at Kasaragod, Kerala. He received his BSc Engineering (Electronics and Communication) from University of Kerala in 1977 and completed his MTech (Microwave and Optical Communication Engineering) from IIT, Kharagpur in 1985.

He had served at Vikram Satellite Earth Station, Arvi from 1979–81. Since 1981, he is working as Scientist at Institute of Armament Technology (DRDO), Pune where presently he is Scientist ‘E’.

His current research interest includes Digital Modulation Techniques, Fiber Optic Communication and Digital Signal Processing. He has published a few Technical Papers in National Journals and Conferences. He is a life member of Society of Electronics Engineers (India) and Society of Electromagnetic Compatibility Fngineers (India)

N Chandrasekaran

N Chandrasekaran graduated from Madras University in Physics with specialisation on Digital Electronics in the year 1985. He then joined Physics Department, IISc, Bangalore, as a Research Scholar. Subsequently he joined DRDO in IAT at Pune in the year 1990 as Scientist. Presently he is the Chairman of Faculty of Applied Physics in Institute of Armament Technology (IAT). His field of interests are High Power Lasers, Fiber Optic Sensors and Non-Linear Optics.

V M Akre

V M Akre received his BE in Electronics from Nagpur University in 1987 and AMIETE in 1989. He received MTech in Lasers & Opto-Electronics from University of Pune in 1999. Commissioned in the Indian Air Force in 1987, he has vast experience on operation and maintenance of various communication systems. His present interest includes Satellite communication & Networking.