Cross-sensitivity considerations for wavelength-modulated and interferometric optical fiber sensors

Scott A. Meller; Vivek Arya; Anbo Wang; Richard O. Claus

doi:10.1117/12.229220

3 January 1996 Cross-sensitivity considerations for wavelength-modulated and interferometric optical fiber sensors

Scott A. Meller, Vivek Arya, Anbo Wang, Richard O. Claus

Proceedings Volume 2594, Self-Calibrated Intelligent Optical Sensors and Systems; (1996) https://doi.org/10.1117/12.229220
Event: Photonics East '95, 1995, Philadelphia, PA, United States

Abstract

Cross-sensitivity refers to the `cross-talk' between the perturbation being monitored (strain, etc.) and the unwanted ambient physical variables. These cross-sensitivity considerations need to be resolved for realizing accurate, self-calibrated fiber sensor configurations. This paper presents an evaluation of the cross-sensitivity existing between physical variables typically measured by Bragg grating based fiber sensors and the extrinsic Fabry-Perot interferometer (EFPI) based sensors. Cross-sensitivities were investigated between the desired measurand, axial strain, and undesirable sources of error, lateral strain and temperature fluctuation. It is shown that the EFPI sensors are less susceptible to cross-sensitivity induced error than Bragg grating based optical fiber sensors. From the results obtained, it is concluded that the extrinsic Fabry-Perot sensor is a better candidate for certain applications requiring minimized cross- sensitivities, as compared with the Bragg grating-based optical fiber sensor.

Citation Download Citation

Scott A. Meller, Vivek Arya, Anbo Wang, and Richard O. Claus "Cross-sensitivity considerations for wavelength-modulated and interferometric optical fiber sensors", Proc. SPIE 2594, Self-Calibrated Intelligent Optical Sensors and Systems, (3 January 1996); https://doi.org/10.1117/12.229220

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