Fiber Bragg Grating sensor packages for sensing water pressures inside ocean

This paper discusses the design and development of newer packaging schemes for Fiber Bragg Gratings (FBGs) for sensing water pressures inside ocean. The FBGs used in this work have been fabricated using the phase mask technique, in a photosensitive germano silicate optical fiber using a 248nm UV light. The wavelength shifts (ΔλB) in the reflected light from the FBG, resulting from the strain/pressure imparted on the FBGs have been recorded using a high speed Micron-optics FBG interrogation system. Further, an experimental set up has been fabricated to test the efficiency and characteristics of different sensor packages developed. The results obtained indicate that the packages are of good sensitivity, rugged and can be customized depending on the requirement of the application.