Journal Article10.1109/JLT.2020.3002617
Averaging Methods for a Multimode Fiber Interferometer: Experimental and Interpretation
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TL;DR: In this article, the averaged characteristics of the multimode fiber interferometer signals have been investigated, with the average being performed over ensemble, long realization, frequency, cross-section, and combination of these methods as well.
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Abstract: The averaged characteristics of the multimode fiber interferometer signals have been investigated, with the average being performed over ensemble, “long realization”, frequency, cross-section, and combination of these methods as well. The signals were produced at two wavelengths in few- and multi-mode regimes in the graded-index fiber. A practical example of the cross-section average is discussed in more details. The results would be useful for the multimode fiber interferometer utilization as a real-time high-accuracy sensor.
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Citations
Intermodal fiber interferometer with frequency scanning laser for sensor application.
TL;DR: It is demonstrated that the interferometric signal traces repeatedly generated by the laser frequency scans can be used to average the target signal by calculating their autocorrelation function.
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Effective Cleaving Parameters for Multimode Gradient Index CYTOP Polymer Fiber.
TL;DR: The cleaving technique with both slowed motion of the razor blade and increased temperature up to 90 °C demonstrated the best quality of fiber end-faces, whereas the cleave quality was characterized in terms of the light intensity profile emitted by the fiber in near field.
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Broadband intermodal fiber interferometer for sensor application: fundamentals and simulator.
TL;DR: In this article , an intermodal fiber interferometer using the light from an incoherent broadband source has been considered analytically and implemented as a laboratory device, where the use of an optical spectrum analyzer and correlation functions approach in extracting the utility signal made it possible to achieve a linear response to the measured external perturbation and effective fading mitigation.
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Intermodal Fiber Interferometer with Scanning Laser and Correlation Signal Processing: An Experimental Study
A. V. Petrov,Ivan Chapalo,Oleg Kotov +2 more
- 01 Jan 2021
TL;DR: In this article, an intermodal fiber interferometer with a wavelength scanning laser is proposed and experimentally investigated, where the correlation processing of the interferometric signal formed by laser wavelength scans following each other is utilized to provide real-time stable response to external fiber perturbations.
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Advances in Optical Fiber Speckle Sensing: A Comprehensive Review
Ivan Chapalo,Andreas Stylianou,Patrice Mégret,Antreas Theodosiou +3 more
TL;DR: This comprehensive review highlights the advancements in optical fiber speckle sensing, focusing on fiber specklegram sensors (FSSs) as promising alternatives due to simplicity and low cost, with a holistic view of their future prospects and emerging applications.
2
References
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TL;DR: A method of sensing vibration using the detection of changes in the spatial distribution of energy in the output of a multimode optical fiber has been demonstrated and a mathematical model has been developed which has shown good agreement with observed sensor behavior.
165
Submicrometer displacement sensing using inner-product multimode fiber speckle fields
TL;DR: It is shown that the sensitivity of displacement can be in the submicrometer range and the dynamic range of the displacement sensing are quantitatively analyzed.
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Machine Learning for Turning Optical Fiber Specklegram Sensor into a Spatially-Resolved Sensing System. Proof of Concept
Alberto Rodríguez Cuevas,Marco Fontana,Luis Rodriguez-Cobo,Mauro Lomer,Jose Miguel Lopez-Higuera +4 more
TL;DR: A system able to classify perturbations according to the place they have been caused along a multimode optical fiber has been designed and results show classifications up to 99% when the system has to categorize among three different locations.
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TL;DR: It is shown that passive speckle patterns in multimode waveguides potentially provide excellent MMs for CS, and the planar waveguide results indicate a path to a microwave photonic integrated circuit for measuring sparse gigahertz-band RF signals using CS.