A novel digital phase tracking algorithm for a high resolution fibre Bragg grating based sensor system

BT Meggitt, W Li, WJO Boyle, YM Gebremichael
2005 Journal of Physics, Conference Series  
A novel digital phase tracking algorithm for a high resolution fibre Bragg grating based sensor system To cite this article: BT Meggitt et al 2005 J. Phys.: Conf. Ser. 15 74 View the article online for updates and enhancements. Abstract. The development of a high-resolution, optical fibre Bragg grating sensor system is described that incorporates a novel digital, condition-based, phase-tracking algorithm for unwrapping the 2π phase ambiguity and permits the continuous up/down phase-tracking of
more » ... phase-tracking of multiple fringe changes. An all-fibre, Michelson interferometric phase-measurement approach is utilised for the determination of strain and temperature induced Bragg wavelength shifts. The system incorporates orthoconjugate mirrors and a stabilised reference channel to compensate for polarisation and random thermal induced drifts and has the potential for resolving sub-µstrain and mK temperature changes with a resolutions of <100nε/√Hz (at 1Hz) and <10mK respectively.
doi:10.1088/1742-6596/15/1/013 fatcat:52irhy6hjvhrjll7uxgwxe5cwm