The Fiber-Optic Sensor for the Museum Collections Protection

Życzkowski, M.

doi:10.12693/aphyspola.122.933

Cited by 10 publications

(9 citation statements)

References 6 publications

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“…Interestingly, all of their recent work focuses on a security system based on intermodal interference or modalmetric detection, as they now refer to it [45]- [47]. The technique is almost identical to the earlier work on intermodal interference except they have performed a much more detailed analysis of the integrity of the system.…”

Section: B Fully Distributed Fiber Optic Pidsmentioning

confidence: 99%

Optical Fiber Sensors in Physical Intrusion Detection Systems: A Review

2016

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Fiber optic sensors have become a mainstream sensing technology within a large array of applications due to their inherent benefits. They are now used significantly in structural health monitoring, and are an essential solution for monitoring harsh environments. Since their first development over thirty years ago, they have also found promise in security applications. This paper reviews all of the optical fiber based techniques used in physical intrusion detection systems. It details the different approaches used for sensing, interrogation and networking, by research groups, attempting to secure both commercial and residential premises from physical security breaches. The advantages and disadvantages of the systems are discussed and each of the different perimeter protection methods are outlined, namely, in-ground, perimeter fence, and window and door protection. The study reviews the progress in optical fiber based intrusion detection techniques from the past through to current state-of-the-art systems and identifies areas which may provide opportunities for improvement, as well as proposing future directions in this field.

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Section: B Fully Distributed Fiber Optic Pidsmentioning

confidence: 99%

Optical Fiber Sensors in Physical Intrusion Detection Systems: A Review

2016

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“…Light from the source is introduced to the multimode fiber core by section of the single-mode optical fiber (SM) (2) and an optical circulator (3). Multimode fiber (4) (measurement/sensing arm) MM is ended with reflecting surface (5). The part of the radiation reflected from the mirror goes through the circulator to the detector (7) throughout a single mode fiber (6).…”

Section: Principle Of Operation and Construction Of The Sensor For Apmentioning

confidence: 99%

Simple fiber optic sensor for applications in security systems

Życzkowski

Karol

Markowski

et al. 2014

Unmanned/Unattended Sensors and Sensor Networks X

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In this paper we demonstrate measurement results of the modalmetric fiber optic sensor used for the monitoring of the fiber optic link integrity to protect it against unauthorized access to classified information. The presented construction is based on the detection of changes of the modes distribution in a multimode fiber. Any mechanical stress on the multimode fiber causes changes of polarization and distribution of propagating modes, hence it changes the distribution of modes at the end of the multimode fiber. Observation of these changes using a narrow core single-mode fiber allows to use the structure as an optical fiber sensor. We used several kilometers long optical links to conduct field tests of laboratory sensor. On this basis the prototype module of modalmetric fiber optic sensor wasbuilt. The modification of optoelectronic part, the variation of sensor length and the change of the method of light reflection at the end of the fiber enable the use of the modalmetric fiber optic sensor in many applications. The sensor finds wide range of applications in security systems. It can be applied to protect the museum's collection, transmission lines and to protect objects of critical infrastructure.

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“…Interacting to multimode fiber the distribution of the output radiation is changed. Intensity pattern distribution of radiation in a multimode fiber describes formula [6]:…”

Section: Modalmetric Systemmentioning

confidence: 99%

Improvement of sensitivity for hybrid fiber optic sensor for application in perimeter protection

et al. 2013

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This paper presents ways to improve the sensitivity of the interferometric hybrid sensor. Hybrid interferometer is defined as a combination of modalmetric sensor and interferometer sensor. Hybrid interferometer is presented as an application to extensive security systems, where particular importance is the early detection of an intruder. Specification of the hybrid sensor is based on the phenomenon of outputting the interferometer from interference as a result of the disorder. Hybrid sensor sensitivity depends therefore on determine when the sensor leaves the interference. Improve the detection sensitivity can be increased by improving the contrast of interference pattern at the output of the interferometer by using polarization balance. This paper presents a preliminary study and the conclusions of using polarization balance in the hybrid interferometer system.

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The Fiber-Optic Sensor for the Museum Collections Protection

Cited by 10 publications

References 6 publications

Optical Fiber Sensors in Physical Intrusion Detection Systems: A Review

Optical Fiber Sensors in Physical Intrusion Detection Systems: A Review

Simple fiber optic sensor for applications in security systems

Improvement of sensitivity for hybrid fiber optic sensor for application in perimeter protection

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