A digital post-processing technique based on spectrum correlation is developed and applied to determining the Bragg wavelength shift accuracy in fiber Bragg grating (FBG) sensors. Theoretical analysis shows that the enhancement factor is proportional to the square root of the number of the independent sampling points within the 3d B bandwidth of the FBG. A wavelength detection accuracy of better than 1 pm in terms of standard deviation was experimentally demonstrated, representing an enhancement factor of 7.3 over the conventional peak detection technique. This technique may also be used for applications such as white light interferometer sensors where the interferometric pattern shifts with applied measurand while the shape of the pattern remains unchanged.
Enhancement of wavelength detection accuracy in fiber Bragg grating sensors by using a spectrum correlation technique
2002-01-01
241585 byte
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
Athermalized Wavelength Locker Using Fiber Bragg Grating
British Library Conference Proceedings | 2001
|Athermalized wavelength locker using fiber Bragg grating
IEEE | 2001
|Multiplexed Bragg Grating Fiber Sensors
British Library Conference Proceedings | 1994
|Bragg Grating Fiber Laser Sensors
British Library Conference Proceedings | 1994
|Detection Limit of Etched Fiber Bragg Grating Sensors
British Library Online Contents | 2013
|