Mikhail G. Shlyagin

TL;DR: A method that combines an interferometric technique with wavelength scanning and permits a precise nondestructive measurement of the birefringence along different sections of a long optical fiber is described.

TL;DR: In this article, a novel type of fiber optic Bragg grating sensor for petroleum hydrocarbon leak detection is presented, which includes attached to the fiber a polymer member, which reversibly expands in hydrocarbon presence and strains the fiber section with the Bragg inside.

TL;DR: In this article, a demodulation algorithm for sensors consisting of two Bragg gratings separated by a short distance is presented, which works as an unbalanced interferometer sensitive to temperature or axial strain variations.

TL;DR: In this article, a fiber optic sensor with a transmission/reflection analyzer for detection and localization of a perturbation that generates additional losses in the test fiber is presented.

TL;DR: In this paper, a distributed fiber optic bending sensor for petroleum hydrocarbon leak detection based on coherent optical frequency domain reflectometry (C-OFDR) technique is presented, which utilizes the principle of distributed detection with section localization (DDSL) of perturbation.