Fiber Optic Raman Distributed Temperature Sensor Based on an Ultrashort Pulse Mode-Locked Fiber Laser

Ososkov, Yan; Chernutsky, Anton O.; Dvoretskiy, Dmitriy A.; Sazonkin, Stanislav G.; Kudelin, Igor S.; Orekhov, Ilya O.; Pnev, Alexey B.; Karasik, Valeriy E.

doi:10.1134/s0030400x19100199

Cited by 21 publications

(3 citation statements)

References 10 publications

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“…Reducing the pulse width can optimize the system’s spatial resolution, but it deteriorates the system’s sensing distance. For example, Ososkov and Chernutsky et al proposed and demonstrated a sensing scheme based on an ultrashort pulse mode-locked fiber laser 124 . Experimental results show that this scheme achieves a temperature resolution of 1.5 °C and a spatial resolution of 10 cm at an effective sensing distance of 3.0 m. Moreover, this ensures that the spatial resolution of the existing long-distance Raman distributed optical fiber system is to limited to the order of meters 89 .…”

Section: Challenges and Methodsmentioning

confidence: 99%

Physics and applications of Raman distributed optical fiber sensing

Zhang

2022

Light Sci Appl

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Raman distributed optical fiber sensing has been demonstrated to be a mature and versatile scheme that presents great flexibility and effectivity for the distributed temperature measurement of a wide range of engineering applications over other established techniques. The past decades have witnessed its rapid development and extensive applicability ranging from scientific researches to industrial manufacturing. However, there are four theoretical or technical bottlenecks in traditional Raman distributed optical fiber sensing: (i) The difference in the Raman optical attenuation, a low signal-to-noise ratio (SNR) of the system and the fixed error of the Raman demodulation equation restrict the temperature measurement accuracy of the system. {ii) The sensing distance and spatial resolution cannot be reconciled. (iii) There is a contradiction between the SNR and measurement time of the system. (iv) Raman distributed optical fiber sensing cannot perform dual-parameter detection. Based on the above theoretical and technical bottlenecks, advances in performance enhancements and typical applications of Raman distributed optical fiber sensing are reviewed in this paper. Integration of this optical system technology with knowledge based, that is, demodulation technology etc. can further the performance and accuracy of these systems.

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Section: Challenges and Methodsmentioning

confidence: 99%

Physics and applications of Raman distributed optical fiber sensing

Zhang

2022

Light Sci Appl

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“…Passively mode-locked fiber lasers (PMLFLs) are versatile devices for the generation of short and ultrashort pulses, which have found multiple applications such as micromachining [1,2], optical coherence tomography [3], optical sensors [4,5], spectroscopy [6] and so on [7,8]. For that reason, PMLFLs are an essential technology that constantly experiences new developments, so the study of pulsed fiber lasers plays an important part in the development of science and the emergence of new applications.…”

Section: Introductionmentioning

confidence: 99%

Real-time characterization of regimes between continuous-wave operation and mode locking in an all-normal dispersion ytterbium-doped fiber ring laser

Gonzalez-Vidal¹,

Pottiez²,

Hernández-García³

et al. 2022

Laser Phys.

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In the present work, the temporal dynamics of an all-normal-dispersion ytterbium-doped fiber ring laser operating in regimes intermediate between continuous-wave operation and mode locking are studied experimentally. Exploiting the segmented memory data acquisition possibilities of an ultrafast digital oscilloscope and through the use of a specifically developed algorithm, the real-time waveform evolution anchored in absolute time could be retrieved, without relying on a fixed reference carried by the signal itself, which does not exist in these regimes. By controlling the time spacing between the successively acquired frames, several dynamics taking place over different time scales could be evidenced and described. These measurements highlight in particular the evolution cycles of intense localized structures including spikes that emerge, grow, decay, interact and describe peculiar trajectories in phase-space diagrams, whereas their temporal positions evolve, driven in particular by gain dynamics. In spite of their dramatic variability, these structures are found to be enduring features of these regimes. Analysis of these data helps assessing the degree of partial mode locking associated with these dynamics. The time-domain mapping technique optimized using segmented memory data acquisition is shown to be useful to characterize precisely highly dynamical evolutions such as those revealed in this work, which are dominated by structures that present large and complex variations in amplitude, shape and position, and develop over different time scales.

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“…Nowadays, many tasks can be solved in science and technics with the help of FOSs. They are useful for measuring deformation [ 9 ], temperature [ 10 , 11 , 12 ], vibration [ 13 ], concentration of substances [ 14 ], rotation speed [ 15 ], refractive index [ 16 ], pressure [ 17 ], liquid level [ 18 ], acceleration [ 19 ], acoustics [ 20 , 21 , 22 ], and other parameters [ 2 , 23 , 24 , 25 ]. Additionally, new types of fiber promise to open new opportunities for such monitoring devices [ 26 , 27 ].…”

Section: Introductionmentioning

confidence: 99%

Study of Intra-Chamber Processes in Solid Rocket Motors by Fiber Optic Sensors

Zhirnov

Stepanov

Sazonkin

et al. 2021

Sensors

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In this study, an experimental study of the burning rate of solid fuel in a model solid propellant rocket motor (SRM) E-5-0 was conducted using a non-invasive control method with fiber-optic sensors (FOSs). Three sensors based on the Mach–Zehnder interferometer (MZI), fixed on the SRM E-5-0, recorded the vibration signal during the entire cycle of solid fuel burning. The results showed that, when using MZI sensors, the non-invasive control of solid fuel burnout is made possible both by recording the time of arrival of the combustion front to the sensor and by analyzing the peaks on the spectrogram of the recorded FOS signal. The main mode of acoustic vibrations of the chamber of the model SRM is longitudinal, and it changes with time, depending on the chamber length. Longitudinal modes of the combustion chamber were detected by MZI only after the combustion front passed its fixing point, and the microphone was unable to register them at all. The results showed that the combustion rate was practically constant after the first second, which was confirmed by the graph of the pressure versus time at the nozzle exit.

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Fiber Optic Raman Distributed Temperature Sensor Based on an Ultrashort Pulse Mode-Locked Fiber Laser

Cited by 21 publications

References 10 publications

Physics and applications of Raman distributed optical fiber sensing

Physics and applications of Raman distributed optical fiber sensing

Real-time characterization of regimes between continuous-wave operation and mode locking in an all-normal dispersion ytterbium-doped fiber ring laser

Study of Intra-Chamber Processes in Solid Rocket Motors by Fiber Optic Sensors

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