Patent ID: 7151872
Filing Date: 2006-12-19
Classification: G01K,G01N,G02B,Y02E

Abstract:
1. A sensing module positioned about an optical fiber cable having a long axis, a core of said optical fiber for transmitting light through said optical fiber cable, said sensing module comprising: a first short-period fiber grating positioned about said core; a second short-period fiber grating positioned about said core and at a distance along said long axis with respect to said first short-period fiber grating; at least one of a long-aperiod fiber grating and a long-period fiber grating positioned between said first short-period fiber grating and said second short-period fiber grating; a fiber cladding positioned about said at least one of said long-aperiod fiber grating and said long-period fiber grating; and a sensing skin positioned about said fiber cladding, said sensing skin comprising a chemical gas active material.