title: Relative humidity sensor with optical fiber Bragg gratings.
abstract: A novel concept for an intrinsic relative humidity (RH) sensor that uses polyimide-recoated fiber Bragg gratings is presented. Tests in a controlled environment indicate that the sensor has a linear, reversible, and accurate response behavior at 10-90% RH and at 13-60 degrees C. The RH and temperature sensitivities were measured as a function of coating thickness, and the thermal and hygroscopic expansion coefficients of the polyimide coating were determined.
authors.forename: Pascal
authors.initials: P
authors.lastname: Kronenberg
authors.forename: Pramod K
authors.initials: PK
authors.lastname: Rastogi
authors.forename: Philippe
authors.initials: P
authors.lastname: Giaccari
authors.forename: Hans G
authors.initials: HG
authors.lastname: Limberger