Dr. Filippov is world expert in the filed of fiber optical devices and worked at University of Southampton (2002-2005) and Liekki Corp. (2005-2007). Since 2007 he is with Optoelectronics Research Centre Tampere University of Technology. Dr. Filippov has published more than 100 peer-reviewed journal articles and he is inventor of active tapered fibers, His main field of interest is optical fibers, fiber sensors and fiber lasers and amplifiers.