Patent ID: 7539361

Claim:
An optical fiber device for measuring a parameter of interest, comprising: an optical fiber including an elongated cylindrical core formed of a core material that is optically transmissive, the core material having optical properties dynamically variable responsive to said parameter of interest, wherein said parameter of interest is a member of the group consisting of temperature and strain, a first optical cladding layer disposed on the core, and at least one optical grating disposed within said first optical cladding layer, said optical grating varying the index of refraction of the first optical cladding layer for modifying a propagation path of selected wavelengths of light provided to said core by a source of light; a first detector optically coupled to said optical fiber and configured for measuring one or more first characteristics of selected wavelengths of light propagated along a length of said optical fiber for determining said parameter of interest; and a control processor communicatively coupled to said first detector and configured for determining a value of said parameter of interest from said first characteristics of said wavelengths of light measured by said first detector; wherein the core is defined by a bore that is filled with said core material including a liquid or a fluid.