Petrofibre Ltd.

Novomoskovsk, Russia

Petrofibre Ltd.

Novomoskovsk, Russia
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Gorshkov B.G.,RAS A.M. Prokhorov General Physics Institute | Gorshkov G.B.,PetroFibre Ltd | Taranov M.A.,PetroFibre Ltd
Laser Physics Letters | Year: 2017

A novel method of simultaneous distributed temperature and strain sensing in optical fibers is proposed. The method is based on the dependence of spontaneous Raman scattering intensity on the applied stress. A simple Raman reflectometry arrangement similar to distributed temperature sensors is used. 30 μ strain and 0.02 K root mean square errors of the simultaneously measured strain and temperature, respectively, are demonstrated for a spatial resolution of 2 m. Realization through this method is simple and can compete with the one based on Brillouin scattering for some applications. © 2016 Astro Ltd.


Gorshkov B.G.,RAS A.M. Prokhorov General Physics Institute | Taranov M.A.,PetroFibre Ltd | Alekseev A.E.,RAS Institute of Radio Engineering and Electronics
Laser Physics | Year: 2017

A novel arrangement for fiber optic distributed stress and temperature sensing based on the Rayleigh scattering spectra correlation method is proposed. The principal feature of the arrangement is usage of low-coherence light in probe pulses, which ensures a wide dynamic range for measurements at moderate sensitivity. Such a characteristic corresponds to performance specifications for infrastructure monitoring systems. A theory of optical time domain reflectometry for arbitrary coherence light is developed describing the contrast in reflectograms and Rayleigh scattering spectra properties. The experimental setup uses a wideband source of light pulses and an electronically controlled micro-electro-mechanical system optical filter for wavelength tuning. Temperature change experiments show root mean square (RMS) noise levels of 0.13 °C, 0.24 °C and 0.3 °C for fiber lengths of 2 km, 8 km and 25 km, respectively, at a spatial resolution of about 1 m (for 10 min data collection). As much as 2000 μstrain dynamic range is demonstrated in the stress measurement experiment while the noise level (RMS error) is estimated to be 2 μstrain. Our experimental results are compared with the theory and a satisfactory match is demonstrated. © 2017 Astro Ltd.


Budylin G.S.,Moscow State University | Gorshkov B.G.,RAS A.M. Prokhorov General Physics Institute | Gorshkov G.B.,PetroFibre Ltd. | Zhukov K.M.,Laboratory of Electronic and Optical Systems Ltd. | And 2 more authors.
Quantum Electronics | Year: 2017

A new scheme of a fibre-optic Brillouin reflectometer is experimentally studied, in which the spectral line of spontaneous Brillouin scattering is selected by an active Brillouin filter represented by the tested fibre itself. To improve the reflectometer characteristics, a cyclic code and Raman amplification of the scattering signal are applied. With an averaging time of 5 min, scanning of 25 km of fibre with a spatial resolution of 4 m and a sampling resolution of 1 m are provided. The root-mean-square deviation in determining the Brillouin frequency is less than 1.1 MHz. The reflectometer sensitivity is evaluated with respect to the temperature changes and mechanical deformation. © 2017 Kvantovaya Elektronika and Turpion Ltd.


Alekseev A.E.,RAS Institute of Radio Engineering and Electronics | Vdovenko V.S.,Petrofibre Ltd. | Gorshkov B.G.,RAS A.M. Prokhorov General Physics Institute | Potapov V.T.,RAS Institute of Radio Engineering and Electronics | Simikin D.E.,Petrofibre Ltd.
Laser Physics | Year: 2014

A novel configuration of a phase-sensitive optical time-domain reflectometer (OTDR) utilizing dual-pulse phase modulations of the probe signal is presented and experimentally demonstrated. The proposed modulation method enables one to perform the demodulation and reconstruction of an external perturbation signal which impacts the fiber using the phase diversity technique. The proposed phase-sensitive OTDR has some advantages in comparison with conventional solutions, which are discussed. The feasibility of a double pulse OTDR with phase modulation is demonstrated and theoretically proved. © 2014 Astro Ltd.


Alekseev A.E.,RAS Institute of Radio Engineering and Electronics | Vdovenko V.S.,Petrofibre Ltd. | Gorshkov B.G.,RAS A.M. Prokhorov General Physics Institute | Potapov V.T.,RAS Institute of Radio Engineering and Electronics | Simikin D.E.,Petrofibre Ltd.
Laser Physics | Year: 2015

In the present communication we propose a novel approach to the realization of a phase sensitive optical time-domain reflectometer (OTDR) which is capable of a precise reconstruction of the phase signal which impacts the arbitrary point of a fiber-optic line. The method uses a dual-pulse probe signal with diverse carrier optical frequency within each half of the double pulse. The quasi-periodic intensity pattern which emerges as a result of double frequency backscattered signal interference contains the information of the external action over the fiber. The phase signal is extracted with the aid of an I/Q quadrature demodulation scheme, realized at the receiving side of the OTDR. The feasibility and limitations of the proposed scheme are theoretically proved and experimentally demonstrated. © 2015 Astro Ltd.


Alekseev A.E.,RAS Institute of Radio Engineering and Electronics | Vdovenko V.S.,Petrofibre Ltd. | Gorshkov B.G.,RAS A.M. Prokhorov General Physics Institute | Potapov V.T.,RAS Institute of Radio Engineering and Electronics | Simikin D.E.,Petrofibre Ltd.
Journal of Communications Technology and Electronics | Year: 2016

The results of investigation of a new type of the optical-fiber coherent phase-sensitive reflectometer with two different optical frequencies of probing pulses are presented. The use of pulses with different optical frequencies allows recovering of the signal of an external action on the reflectometer optical fiber by means of phase diversity technique. The applicability of the proposed technique is justified theoretically and experimentally. © 2016, Pleiades Publishing, Inc.


Alekseev A.E.,RAS Institute of Radio Engineering and Electronics | Vdovenko V.S.,Petrofibre Ltd. | Gorshkov B.G.,RAS A.M. Prokhorov General Physics Institute | Potapov V.T.,RAS Institute of Radio Engineering and Electronics | Simikin D.E.,Petrofibre Ltd.
Laser Physics | Year: 2016

In the present paper we propose a novel method for optical time-domain reflectometer (OTDR)-reflectogram contrast enhancement via compensation of nonlinear distortions of propagating probe pulse, which arise due to the self-phase modulation (SPM) effect in optical fiber. The compensation is performed via preliminary frequency modulation (chirp) of the initial probe pulse according to the specific law. As a result the OTDR contrast at some distant predefined fiber point is fully restored to the value of non-distorted probe pulse at the beginning of the fiber line. As a result, the performance of the phase OTDR increases. The point of full SPM compensation could be shifted to any other point of the fiber line via preliminary frequency modulation index change. The feasibility of the proposed method is theoretically proved and experimentally demonstrated. © 2016 Astro Ltd.


Alekseev A.E.,RAS Institute of Radio Engineering and Electronics | Vdovenko V.S.,Petrofibre Company | Gorshkov B.G.,RAS A.M. Prokhorov General Physics Institute | Potapov V.T.,RAS Institute of Radio Engineering and Electronics | Simikin D.E.,Petrofibre Company
Technical Physics Letters | Year: 2015

Results of investigation of a phase-sensitive fiber-optic coherence reflectometer with amplitude-phase modulation of probing pulses are presented. Using this method of modulation, it is possible to reconstruct the signal of external impact upon the reflectometer fiber by means of the phase diversity technique. The applicability of the proposed method is theoretically justified and experimentally verified. © 2015, Pleiades Publishing, Ltd.


Alekseev A.E.,RAS Institute of Radio Engineering and Electronics | Vdovenko V.S.,Petrofibre Ltd. | Gorshkov B.G.,RAS A.M. Prokhorov General Physics Institute | Potapov V.T.,RAS Institute of Radio Engineering and Electronics | Simikin D.E.,Petrofibre Ltd.
Laser Physics | Year: 2016

In the present paper we propose a novel type of a coherent phase-sensitive optical time-domain reflectometer (OTDR) that utilizes a multimode optical fiber as a sensitive element and is capable of considerable reduction of signal fading. Elimination of OTDR signal fading consequently removes randomly occurring insensitivity of the fiber regions to an external phase action. The backscattered light field at the input of OTDR sensitive multimode optical fiber is represented by a speckle-like pattern, due to a so called modal noise phenomenon. This speckle pattern randomly changes when an optical probe pulse propagates in the fiber line. The backscattered field intensity in every single speckle changes in time statistically independently from the intensity change in every other speckle remote enough from the first one. Thus, on the output of a multimode sensitive fiber, there exist several statistically independent reflectograms, and every single reflectogram contains the same information about external action. The joint independent analysis of these reflectograms can result in reduced or complete fading elimination. © 2016 Astro Ltd.

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