Dr. Nikolai A. Ushakov Profile

Dr. Nikolai A. Ushakov

at Peter the Great Saint-Petersburg Polytechnic Univ

SPIE Involvement:

Author

Area of Expertise:

spectral interferometry , extrinsic Fabry-Perot

Websites:

Company Website

Publications (8)

Proceedings Article | 20 November 2024 Paper

Resolution limits of core-cladding intermodal fiber-optic refractive index sensors with spectral interferometric interrogation

Aleksandr Markvart, Liubov Zavalishina, Aleksandr Petrov, Leonid Liokumovich, Nikolai Ushakov

Proceedings Volume 13243, 1324308 (2024) https://doi.org/10.1117/12.3036412

KEYWORDS: Coating, Refractive index, Cladding, Interferometers, Fiber optics sensors, Metals, Fiber coatings, Interferometry, Spectral resolution, Signal to noise ratio

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Proceedings Article | 28 August 2019 Paper

Spectral interferometry for high-finesse Fabry-Perot sensors: Cramer-Rao bound of cavity length resolution

Aleksandr Markvart, Leonid Liokumovich, Nikolai Ushakov

Proceedings Volume 11199, 111992Y (2019) https://doi.org/10.1117/12.2540021

KEYWORDS: Interferometry, Sensors, Signal to noise ratio, Fiber optics sensors, Fabry–Perot interferometers, Fabry–Perot interferometry, Reflectivity, Resolution enhancement technologies, Optical sensors

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Proceedings Article | 6 January 2015 Paper

Optical properties of metallic nanoparticles trapped by arabinogalactan molecule

Nikolai Ushakov, Natalia Radchuk, Alexandr Ushakov

Proceedings Volume 9450, 94500F (2015) https://doi.org/10.1117/12.2070477

KEYWORDS: Refractive index, Interferometers, Nanoparticles, Silver, Composites, Particles, Molecules, Mirrors, Interferometry, Metals

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SPIE Journal Paper | 12 November 2014

Measurement of dynamic interferometer baseline perturbations by means of wavelength-scanning interferometry

Nikolai Ushakov, Leonid Liokumovich

OE, Vol. 53, Issue 11, 114103, (November 2014) https://doi.org/10.1117/12.10.1117/1.OE.53.11.114103

KEYWORDS: Interferometers, Signal to noise ratio, Interferometry, Interference (communication), Signal detection, Signal processing, Demodulation, Sensors, Photodetectors, Transform theory

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Proceedings Article | 2 June 2014 Paper

Multiplexed EFPI sensors with ultra-high resolution

Nikolai Ushakov, Leonid Liokumovich

Proceedings Volume 9157, 915722 (2014) https://doi.org/10.1117/12.2059180

KEYWORDS: Sensors, Multiplexing, Interferometers, Optical resolution, Fabry–Perot interferometry, Mirrors, Algorithm development, Demodulation, Dielectric mirrors, Lawrencium

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Proceedings Article | 15 May 2014 Paper

EFPI sensor utilizing optical spectrum analyzer with tunable laser: detection of baseline oscillations faster than spectrum acquisition rate

Nikolai Ushakov, Leonid Liokumovich

Proceedings Volume 9141, 914116 (2014) https://doi.org/10.1117/12.2052566

KEYWORDS: Sensors, Signal processing, Interferometers, Interferometry, Fiber optics sensors, Lithium, Phase shifts, Spectrum analysis, Fabry–Perot interferometry, Mirrors

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Proceedings Article | 1 May 2014 Paper

Investigation of baseline measurement resolution of a Si plate-based extrinsic Fabry-Perot interferometer

Nikolai Ushakov, Leonid Liokumovich

Proceedings Volume 9132, 913214 (2014) https://doi.org/10.1117/12.2052388

KEYWORDS: Silicon, Fabry–Perot interferometry, Semiconducting wafers, Signal processing, Interferometers, Refractive index, Sensors, Fiber optics sensors, Mirrors, Phase shifts

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Proceedings Article | 13 May 2013 Paper

EFPI signal processing method providing picometer-level resolution in cavity length measurement

Nikolai Ushakov, Leonid Liokumovich, Andrey Medvedev

Proceedings Volume 8789, 87890Y (2013) https://doi.org/10.1117/12.2020255

KEYWORDS: Interferometers, Signal processing, Mirrors, Fabry–Perot interferometry, Reflectivity, Lawrencium, Fiber Bragg gratings, Spectral resolution, Interferometry, Structured optical fibers

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Showing 5 of 8 publications

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