Studies on merged Sagnac-Michelson interferometer for detecting phase sensitive events on fiber optic cables

Mohanan, Bibi; Shaija, P.J.; Varghese, Samuel

doi:10.1109/imac4s.2013.6526388

Cited by 6 publications

(3 citation statements)

References 13 publications

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“…However, in Figure 11i, unstable sensitivity regions are observed at the beginning of sentences six and eight, which are in an increased-sensitivity region. This may be due to random changes in the propagating light polarization state, which leads to the polarization-induced fading (PIF) effect [40]. If a preamplifier is used, some parasitic high-power spectrum components appear in a frequency region of 3.5 kHz, but they do not affect the quality of speech recognition dramatically.…”

Section: A Sensing Fiber On Thementioning

confidence: 99%

Detection and Recognition of Voice Commands by a Distributed Acoustic Sensor Based on Phase-Sensitive OTDR in the Smart Home Concept

Gritsenko,

Orlova,

Zhirnov

et al. 2024

Sensors

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In recent years, attention to the realization of a distributed fiber-optic microphone for the detection and recognition of the human voice has increased, whereby the most popular schemes are based on φ-OTDR. Many issues related to the selection of optimal system parameters and the recognition of registered signals, however, are still unresolved. In this research, we conducted theoretical studies of these issues based on the φ-OTDR mathematical model and verified them with experiments. We designed an algorithm for fiber sensor signal processing, applied a testing kit, and designed a method for the quantitative evaluation of our obtained results. We also proposed a new setup model for lab tests of φ-OTDR single coordinate sensors, which allows for the quick variation of their parameters. As a result, it was possible to define requirements for the best quality of speech recognition; estimation using the percentage of recognized words yielded a value of 96.3%, and estimation with Levenshtein distance provided a value of 15.

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Section: A Sensing Fiber On Thementioning

confidence: 99%

Detection and Recognition of Voice Commands by a Distributed Acoustic Sensor Based on Phase-Sensitive OTDR in the Smart Home Concept

Gritsenko,

Orlova,

Zhirnov

et al. 2024

Sensors

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“…1,2 Printed antennas, including microstrip patch antennas and slot antennas, due to their low profile, small size, and low cost, are more attractive.…”

Section: Introductionmentioning

confidence: 99%

“…Although the OTDR technique is very powerful and useful, it is limited in terms of sensitivity compared to an interferometry approach. Many fiber‐optic interferometers, such as Sagnac‐Michelson, ϕ‐OTDR, Mach‐Zehnder, and Michelson, have been reported as disturbances detector.…”

Section: Introductionmentioning

confidence: 99%

Modalmetric interferometer under Fingerprint disturbances: The effect of lateral offset between the single‐mode and multimode fiber splice

Ribeiro

Balod

2017

Micro & Optical Tech Letters

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We report on the wavelength and time-domain responses of a lumped or distributed fiber-optic modalmetric interferometer under a very smooth pressure (fingerprint) disturbances in the 1530-1610 nm wavelength range. A simple method to quantify such disturbances is proposed. It is shown that the lateral offset shift of 5.9 mm between RIBEIRO AND BALOD | 151 the single-mode and the multimode fiber splice makes the device even more sensitive. It was measured an electrical signal power enhancements of 3.5 and 7.5 dB for 1 m and 1.65 km multimode fiber link, respectively. K E Y W O R D Sacoustic communications, disturbance sensor, fingerprint, modalmetric fiber-optic interferometer, optoacoustic receiver, security

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A Novel Weak-Scattering Michelson Interferometer Based on PBS for Long-Distance Disturbance Localization

Song

Peng

Zhou

et al. 2020

J. Lightwave Technol.

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Studies on merged Sagnac-Michelson interferometer for detecting phase sensitive events on fiber optic cables

Cited by 6 publications

References 13 publications

Detection and Recognition of Voice Commands by a Distributed Acoustic Sensor Based on Phase-Sensitive OTDR in the Smart Home Concept

Detection and Recognition of Voice Commands by a Distributed Acoustic Sensor Based on Phase-Sensitive OTDR in the Smart Home Concept

Modalmetric interferometer under Fingerprint disturbances: The effect of lateral offset between the single‐mode and multimode fiber splice

A Novel Weak-Scattering Michelson Interferometer Based on PBS for Long-Distance Disturbance Localization

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