Abstract: A fiber Bragg grating interrogator assembly is described. Examples of the fiber Bragg grating interrogator assembly include an optical fiber including a fiber Bragg grating having a variable Bragg wavelength (?B) and a dynamic range of interest (??dyn,B) over which the Bragg wavelength (?B) can shift during use. The fiber Bragg grating interrogator assembly also includes a response analyzer having a spectrally selective device with an input port to which the optical fiber is operably connected, and a plurality of output ports of which each output port is associated with a respective spectral range (??n). The spectral ranges (??n, ??n+1, ??n+2) of each at least three successive output ports partially overlap, such that the FBG's Bragg wavelength (?B) falls inside the spectral ranges (??n, ??n+1, ??n+2) of at least three successive output ports over the dynamic range of interest (??dyn,B) of the FBG.

Abstract: A fiber Bragg grating interrogator assembly is described. Examples of the fiber Bragg grating interrogator assembly include an optical fiber including a fiber Bragg grating having a variable Bragg wavelength (?B) and a dynamic range of interest (??dyn,B) over which the Bragg wavelength (?B) can shift during use. The fiber Bragg grating interrogator assembly also includes a response analyzer having a spectrally selective device with an input port to which the optical fiber is operably connected, and a plurality of output ports of which each output port is associated with a respective spectral range (??n). The spectral ranges (??n, ??n+1, ??n+2) of each at least three successive output ports partially overlap, such that the FBG's Bragg wavelength (?B) falls inside the spectral ranges (??n, ??n+1, ??+2) of at least three successive output ports over the dynamic range of interest (??dyn,B) of the FBG.