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AssigneeKoninklijke Philips N.V.
InventorsGert Wim 'T Hooft, Eibert Gerjan Van Putten, Jeroen Jan Lambertus Horikx, Anna Hendrika Van Dusschoten
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The present invention relates to an optical fiber sensor, comprising an optical fiber having embedded therein at least one fiber core (14, 16, 18, 20) extending along a length of the optical fiber, the at least one fiber core having a plurality of single fiber Bragg gratings (40, 42, 44) arranged in series along the at least one fiber core (14, 16, 18, 20), wherein each fiber Bragg grating (40, 42, 44) has a single reflection spectrum around a single reflection peak wavelength when interrogated with light in an unstrained state of the at least one fiber core (14, 16, 18, 20), wherein the reflection peak wavelengths of the single reflection spectra are different from fiber Bragg grating (40, 42, 44) to fiber Bragg grating (40, 42, 44) along the at least one fiber core. Also described is an optical system and a method of interrogating an optical fiber sensor.
An optical fiber sensor, comprising an optical fiber having embedded therein at least one fiber core extending along a length of the optical fiber, the at least one fiber core having a number of larger than ten single fiber Bragg gratings arranged in series along the at least one fiber core, wherein each fiber Bragg grating has a single reflection spectrum around a single reflection peak wavelength when interrogated with light in an unstrained state of the at least one fiber core, wherein the reflection peak wavelengths of the single reflection spectra are different from fiber Bragg grating to fiber Bragg grating along the at least one fiber core, wherein a difference between reflection peak wavelengths of the single reflection spectra of adjacent fiber Bragg gratings is equal to or larger than a spectral width of the single reflection spectra of the adjacent fiber Bragg gratings.
An optical fiber sensor, comprising an optical fiber having embedded therein at least one fiber core extending along a length of the optical fiber, the at least one fiber core having a number of larger than ten single fiber Bragg gratings arranged in series along the at least one fiber core, wherein each fiber Bragg grating has a single reflection spectrum around a single reflection peak wavelength when interrogated with light in an unstrained state of the at least one fiber core, wherein the reflection peak wavelengths of the single reflection spectra are different from fiber Bragg grating to fiber Bragg grating along the at least one fiber core, wherein a spectral width of at least one of the single reflection spectra is in a range of 10 pm-30 pm for a length of the single fiber Bragg grating of about 100 mm.
Dependencies are inferred from the claim text.