Security risk assessment of the primary layer of wavelength division multiplexing passive optical network

Koudelka, Petr; Šiška, Petr; Látal, Jan; Poboril, Radek; Hajek, Lukas; Kepák, Stanislav; Vašinek, Vladimír

doi:10.1117/12.2070468

Cited by 2 publications

(2 citation statements)

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“…The aforementioned research has shown that polarization fiber-optic sensors are increasingly utilized, especially for security technology in dangerous environments, while in some cases, they are supplemented or combined with fiber Bragg gratings [9]. Additional sources of information for the scientific results presented in this paper can be found in the literature [19][20][21][22][23], and an excellent overview of known and used sensors is described in [24]. Current measurement methods do not allow the use of polarization sensors over long distances as it is not possible to ensure the symmetrical excitation of both polarization planes.…”

Section: Introductionmentioning

confidence: 99%

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: Introductionmentioning

confidence: 99%

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

et al. 2023

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“…In this connection, a power splitter split the power of the light signal with 90 % going to the optical power meter and 10 % to the polarimeter. Compared to other types of fiber optic sensors [6][7][8][9][10][11][12][13][14][15][16][17][18][19], the sensor described here was developed with particular emphasis on security systems, military facilities, Ex-Proof and biomedical environments.…”

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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Security risk assessment of the primary layer of wavelength division multiplexing passive optical network

Cited by 2 publications

References 5 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

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

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