An Automated Instrument for Reflectometry Study of the Pyroelectric Effect in Proton-Exchange Channel Waveguides Based on Lithium Niobate

Ponomarev, Roman; Konstantinov, Yu. A.; Белокрылов, М. Е.; Shevtsov, D. I.; Karnaushkin, P. V.

doi:10.1134/s0020441222050190

Cited by 4 publications

(2 citation statements)

References 26 publications

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“…First, all values in an I (j) array of N elements are normalized from 0 to 1. After this, the I a(j) filtered array is written [21]:…”

Section: Preform Geometric Parameters Measurementmentioning

confidence: 99%

A Non-Destructive Study of Optical, Geometric and Luminescent Parameters of Active Optical Fibers Preforms

Konstantinov,

Turov,

Latkin

et al. 2024

Optics

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This work is devoted to the scientific and technical aspects of individual stages of active optical fibers preforms’ optical-geometric parameters metrological control. The concept of a system presented makes it possible to carry out a study of a rare earth element distribution in the preform of an active optical fiber to monitor geometric parameters, and also to study the evolution of the refractive index profile along the length of the sample at a qualitative level. As far as it is known, it is the first description of the preform optical, geometric, and luminescent properties measurement within a single automated laboratory bench. Also, the novelty of the approach lies in the fact that the study of the refractive index profile variation along the length of the preform is, for the first time, conducted using the “dry” method, that is, without immersing the sample in synthetic oil, which makes the process less labor-intensive and safer.

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“…First, all values in an I (j) array of N elements are normalized from 0 to 1. After this, the I a(j) filtered array is written [21]:…”

Section: Preform Geometric Parameters Measurementmentioning

confidence: 99%

A Non-Destructive Study of Optical, Geometric and Luminescent Parameters of Active Optical Fibers Preforms

Konstantinov,

Turov,

Latkin

et al. 2024

Optics

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“…Researchers from [54], presented an algorithm for OFDR data processing. It is an averaging with a variable length (dynamic) window.…”

Section: Dynamic Spectrum Averagingmentioning

confidence: 99%

Enhancing the Distributed Acoustic Sensors’ (DAS) Performance by the Simple Noise Reduction Algorithms Sequential Application

et al. 2023

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Moving differential and dynamic window moving averaging are simple and well-known signal processing algorithms. However, the most common methods of obtaining sufficient signal-to-noise ratios in distributed acoustic sensing use expensive and precise equipment such as laser sources, photoreceivers, etc., and neural network postprocessing, which results in an unacceptable price of an acoustic monitoring system for potential customers. This paper presents the distributed fiber-optic acoustic sensors data processing and noise suppression techniques applied both to raw data (spatial and temporal amplitude distributions) and to spectra obtained after the Fourier transform. The performance of algorithms’ individual parts in processing distributed acoustic sensor’s data obtained in laboratory conditions for an optical fiber subjected to various dynamic impact events is studied. A comparative analysis of these parts’ efficiency was carried out, and for each type of impact event, the most beneficial combinations were identified. The feasibility of existing noise reduction techniques performance improvement is proposed and tested. Presented algorithms are undemanding for computation resources and provide the signal-to-noise ratio enhancement of up to 13.1 dB. Thus, they can be useful in areas requiring the distributed acoustic monitoring systems’ cost reduction as maintaining acceptable performance while allowing the use of cheaper hardware.

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Method for Increasing the Signal-to-Noise Ratio of Rayleigh Back-Scattered Radiation Registered by a Frequency Domain Optical Reflectometer Using Two-Stage Erbium Amplification

Belokrylov,

Claude,

Konstantinov

et al. 2023

Instrum Exp Tech

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An Automated Instrument for Reflectometry Study of the Pyroelectric Effect in Proton-Exchange Channel Waveguides Based on Lithium Niobate

Cited by 4 publications

References 26 publications

A Non-Destructive Study of Optical, Geometric and Luminescent Parameters of Active Optical Fibers Preforms

A Non-Destructive Study of Optical, Geometric and Luminescent Parameters of Active Optical Fibers Preforms

Enhancing the Distributed Acoustic Sensors’ (DAS) Performance by the Simple Noise Reduction Algorithms Sequential Application

Method for Increasing the Signal-to-Noise Ratio of Rayleigh Back-Scattered Radiation Registered by a Frequency Domain Optical Reflectometer Using Two-Stage Erbium Amplification

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