Optical Communication Fibers Used for Security Sensors Powering

Kyselak, Martin; Grenar, David; Slavíček, Karel

doi:10.1007/978-3-030-96293-7_2

Cited by 3 publications

(5 citation statements)

References 12 publications

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“…Emphasis was placed on the use of light sources typically used in telecommunication technology, and professional sources of coherent radiation were completely abandoned. Although sources of the CLD1015 series (Thorlabs) served well for laboratory measurements [6,7], the researchers were aware that for practical use in existing telecommunication networks, common telecommunication signal sources of the SFP (small form-factor pluggable) port-type were more suitable. A TP LINK MC220L media converter with a DWDM-120-1Gbps SFP port on channel nos.…”

Section: Resultsmentioning

confidence: 99%

“…It has also been demonstrated that it is possible to use special elements such as depolarizers, double sensors [4], or circular polarizers [5] when supplying power over long routes. Other works have attempted to use multiplexing technology (DWDM) for powering sensors, and they describe the beginnings of research into polarization sensors for military purposes [6,7]. The mentioned research has shown that the proposed technologies are fully functional as tested in laboratory conditions and, in some cases, in real environments and real optical routes.…”

Section: Introductionmentioning

confidence: 99%

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Long Distance Military Fiber-Optic Polarization Sensor Improved by an Optical Amplifier

et al. 2023

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The ever-increasing demands for the use of fiber-optic sensors powered by long optical fibers is forcing developers to solve problems associated with powering these remote sensors. Due to their non-electric character, these sensors are suitable for many uses, including military applications. The Army of the Czech Republic is very interested in this type of optical fiber sensor as it fulfils the significant prerequisites for use in military areas. However, the army’s requirements are challenging because they require long supply cables in which there is significant attenuation of optical power. At the same time, there is a need for high sensitivity. The subject of our research team’s work was to use amplifiers to power these sensors. The army already uses this type of sensor for short distances as it cannot ignite a gas mixture with an explosive concentration and thus meet the strict requirements of the explosion-poof standard. The novelty of our research lies in the discovered measurement technique that allows the sensors to be powered remotely and in the saving of optical fibers by utilizing duplex communication with a circulator. Furthermore, the research presents an innovative approach to the optimization of the entire sensor by using a bidirectional, sensory, polarization-maintaining optical fiber. The proposed sensor was first verified in laboratory conditions at the Optoelectronics Laboratory of the University of Defense in Brno, and further tests were carried out in the military training areas of Boletice and Březina in the Czech Republic, which is a member of North Atlantic Treaty Organization.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Long Distance Military Fiber-Optic Polarization Sensor Improved by an Optical Amplifier

et al. 2023

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“…The research described here is based on a polarization maintaining fiber that causes the conversion of an external physical phenomenon into a change in the polarization state in the optical fiber. The principles have been described many times in our publications [1][2][3][4][5][6], while the final connection is shown in Figure 1.…”

Section: Fiber Sensor Polarization Maintaining Fiber Optical Fiber Se...mentioning

confidence: 99%

“…Temperature and pressure can affect the physical properties of an optical fiber, including its birefringence. The sensor monitors changes in the polarization of the light that exits the optical fiber as these are a direct response to changes in the temperature and pressure around the fiber [4][5]. This type of sensor is widely used in industry and scientific research where accurate temperature and pressure monitoring is needed in various environments.…”

Section: Fiber Sensor Polarization Maintaining Fiber Optical Fiber Se...mentioning

confidence: 99%

High-speed polarization fiber sensors optimized for security purposes

Kyselák,

Vyležich,

Slavicek

et al. 2024

Polarization: Measurement, Analysis, and Remote Sensing XVI

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Contemporary advancements in polarization fiber sensor technology offer the potential for substantial enhancements in the responsiveness of security systems, enabling their deployment even in hazardous environments. A significant advantage of these systems is their sensitivity. These fiber systems are faster and safer compared to other security sensors. The possibility of utilizing fiber sensors in environments with an explosion risk makes them irreplaceable in military facilities. This paper focuses on the analysis, design, and testing of a polarization fiber sensor in military applications. The design is focused on monitoring changes in temperature in order to detect object disturbances. Such a detector would act as a very fast, sensitive, and above all non-electrical security system. Further, the design also focuses on changes in pressure that can accompany occurrences such as the passage of military vehicles or the deflections of bridge and building structures in industrial Ex-proof dangerous areas. The amount of different arrangements and measured waveforms makes our work a unique study that confirms the universality and advantages of optical fiber polarization sensors.

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“…Fiber optic sensors can work as temperature sensors [1][2][3][4][5]. In the experiment described in this work, a two-meter fiber connected to the long path of the PM fiber was not covered by a protective sheath.…”

Section: Introductionmentioning

confidence: 99%

Optimization of a polarized light detector for a polarizing optical fiber sensor

Kyselak¹,

Slavíček²,

Grenar³

et al. 2023

SPIE Future Sensing Technologies 2023

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This paper analyzes the method of measuring optical power with an emphasis on the known methods of measuring the power of polarized light propagating through an optical fiber by two polarization axes. The method relies on monitoring the change in the behavior of the sensor fiber parameters when the temperature conditions in its surroundings change. This work deals with the possibilities of measuring the optical power for each propagation axis separately. Simultaneous measurement of the instantaneous state of polarization and a very accurate measurement of the wavelength makes it possible to obtain the necessary information about nonlinear phenomena in the optical fiber. The design of various connections that were selected for implementation in the laboratory is described in detail. The practical implementation includes a set of measurements under different conditions in which a source of temperature change was applied and the response of the parameters to these changes was monitored. The results were measured with a polarimeter and a power meter and are presented in graphs and summarized in the discussion.

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Optical Communication Fibers Used for Security Sensors Powering

Cited by 3 publications

References 12 publications

Long Distance Military Fiber-Optic Polarization Sensor Improved by an Optical Amplifier

Long Distance Military Fiber-Optic Polarization Sensor Improved by an Optical Amplifier

High-speed polarization fiber sensors optimized for security purposes

Optimization of a polarized light detector for a polarizing optical fiber sensor

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