&lt;title&gt;Development problems of frequency reflectometry for monitoring systems of optical fiber structures&lt;/title&gt;

Natanson, Oleg G.; Morozov, Oleg G.; Akhtiamov, Rishad A.; Gusev, Valery F.

doi:10.1117/12.634644

Cited by 6 publications

(8 citation statements)

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“…A series of functional optical-sensing OTFDR systems, including fiber-optic reflectometres, multiplexed fiber Bragg grating (FBG) or fiber Fabry-Perault interferometers (FFPI) sensors are introduced. Fully distributed fiber-optic strain sensing system based on Brillouin frequency shift is highlighted 9,19 , and Brillouin nonlinear effect 20 and four wave mixing compensating system 21 based on optimized TFSPR is also presented. Miscellaneous OTFDR applications in biosensors 22 , two frequency signal forming for photonic microwave filters synthesis [23][24] and measuring of instantaneous microwave frequency 25 are also reviewed.…”

Section: Information Structure Of Symmetric Two Frequency Oscillationmentioning

confidence: 99%

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Theory of symmetrical two-frequency signals and key aspects of its application

Il'in

Morozov²,

Il'in

2014

SPIE Proceedings

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We have proposed and demonstrated in recent years an unique technique to synthesize the two-frequency radiation by manipulating the amplitude and the phase of initial one-frequency lightwave. The output frequencies are symmetrical relatively to suppressed initial one and have strongly equal amplitudes and alternative phases. In this paper the principle of two-frequency radiation synthesis is summarized. The information structure of two-frequency radiation is examined and key aspects of its application are discussed concerning to the theory of precision spectral characterization of resonant structures and theory of quasi-harmonic oscillations and potential noise immunity.

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Section: Information Structure Of Symmetric Two Frequency Oscillationmentioning

confidence: 99%

“…Based upon this technique, the synthesis of two frequency symmetrical probing radiation (TFSPR), various photonic sensing of fiber optic structures and optical information-processing applications have been developed [9][10][11][12][13][14][15] .…”

Section: Introductionmentioning

confidence: 99%

Theory of symmetrical two-frequency signals and key aspects of its application

Il'in

Morozov²,

Il'in

2014

SPIE Proceedings

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“…A certain progress in systems of characterization of SMBGS was reached by generating the scanning double-band amplitude modulated probing radiation from pumping radiation. However this method is characterized by the low sensitivity, caused by need of reception and processing of signals in a wide bandwidth (10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20), and also strong influence on measurement inaccuracy of the upper sideband existence. The solution of this problem also was in use of the double-frequency radiation generated unlike for pumping radiation.…”

Section: Introductionmentioning

confidence: 99%

Microwave signal processing in two-frequency domain for ROF systems implementation: training course

Morozov

2014

SPIE Proceedings

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This article is presented materials from two tutorials: "Optical two-frequency domain reflectometry 1, 2 " and "Microwave technologies in industry, living systems and telecommunications 3 ". These materials were prepared for master training courses and listed in the "SPIE Optical Education Directory" for 2013/2014. The main its theme is microwave photonics. Microwave photonics has been defined as the study of photonic devices operating at microwave frequencies and their application to microwave and optical systems. Its initial rationale was to use the advantages of photonic technologies to provide functions in microwave systems that are very complex or even impossible to carry out directly in the radiofrequency domain. But microwave photonics is also succeeding in incorporating a variety of techniques used in microwave engineering to improve the performance of photonic communication networks and systems. Three parts of this chapter are devoted to applications and construction principles of systems forming microwave photonic filters, measuring instantaneous frequency of microwave heterodyne signals and characterizing stimulated MandelstamBrillouin scattering spectrum in ROF systems. The main emphasis is on the use of the two-frequency symmetric radiation, generated by the Il'in-Morozov's method 4 , in given systems. It is forming radiation for the synthesis of optical filters coefficients, it's application and processing determine the increase in the signal-to-noise ratio during heterodyne frequencies monitoring and characterization of nonlinear effects spectrum.

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“…Morozov et al, 1999. Based upon this technique, the synthesis of two-frequency symmetrical probing radiation (TFSPR), various photonic sensing of fiber optic structures and optical information-processing applications have been developed (Natanson et al, 2005a, 2005b, O.G. Morozov & Aybatov, 2007, O.G.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%