Developing fiber lasers with Bragg reflectors as deep sea hydrophones

Abstract

The present paper will discuss the work in progress at the Department of Physics of the University of Pisa in collaboration with the IFAC laboratory of CNR in Florence to develop pressure sensors with outstanding sensitivity in the acoustic and ultrasonic ranges. These devices are based on optically-pumped fiber lasers, where the mirrors are Bragg gratings written into the fiber core.

Keywords

• hydrophones
• Bragg fiber-laser
• pressure sensors