Patent ID: 6768825
Filing Date: 2004-07-27
Classification: G01L,G02B

Abstract:
An optical pressure sensor comprising:an optical waveguide comprising a core and a cladding disposed outside the core, wherein the cladding has an outside diameter and includes a first and a second variation region each having a modified outside diameter different from the outside diameter, wherein the first and second variation regions are respectively located at a first mounting location and a second mounting location; a Bragg grating imparted in the waveguide between the first mounting location and the second mounting location which provides an optical sensor signal having a spectral profile centered at a characteristic wavelength; a first and second attachment mechanism disposed against at least one portion of the first variation region and the second variation region respectively which prevents relative movement between the first variation region and the first attachment mechanisms; and a mounting device having a first end which mounts to the first attachment mechanism and a second end which mounts to the second attachment mechanism which defines a separation length between the first and second attachment mechanisms along the waveguide and allowing the separation length to vary according to the pressure of the environment, thereby causing a change in the separation length and the characteristic wavelength.