| 摘要 |
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 (λB) and a dynamic range of interest (Δλdyn,B) over which the Bragg wavelength (λB) 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 (Δλn). The spectral ranges (Δλn, Δλn+1, Δλn+2) of each at least three successive output ports partially overlap, such that the FBG's Bragg wavelength (λB) falls inside the spectral ranges (Δλn, Δλn+1, Δλ+2) of at least three successive output ports over the dynamic range of interest (Δλdyn,B) of the FBG. |
| 主权项 |
1. A fiber Bragg grating interrogator assembly, comprising:
an optical fiber including a fiber Bragg grating having a variable Bragg wavelength (λB) and a dynamic range of interest (Δλdyn,B) over which the Bragg wavelength (λB) can shift during use; a light source operably connected to the optical fiber, and configured to illuminate the fiber Bragg grating to solicit a response therefrom; and a response analyzer, including:
a spectrally selective device having an input port and a plurality of output ports, wherein the input port is operably connected to the optical fiber and wherein each of the output ports is associated with a respective spectral range (Δλn), the spectrally selective device being configured to provide a spectral energy distribution of a response of the FBG received on the input port onto the output ports;wherein the respective spectral ranges (Δλn, Δλn+1, Δλn+2) of each at least three successive output ports of the plurality of output ports exhibit a mutual partial overlap, such that the FBG's Bragg wavelength (λB) falls inside the spectral ranges (Δλn, Δλn+1, Δλn+2) of at least three successive output ports over the dynamic range of interest (Δλdyn,B) of the FBG. |
