Fiber optic interferometer as a security element

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27240%2F16%3A86097857" target="_blank" >RIV/61989100:27240/16:86097857 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1117/12.2231089" target="_blank" >http://dx.doi.org/10.1117/12.2231089</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1117/12.2231089" target="_blank" >10.1117/12.2231089</a>

Result language

angličtina

Original language name

Fiber optic interferometer as a security element

Original language description

Interferometric sensors can be categorized as highly sensitive and precise devices with series inconsiderable benefits from the possibility of using standard telecommunication fibers. They can be measured even small changes in the deformation of shapes in time, changes in temperature, pressure, voltage, vibration, electric field, etc. The basic idea, which is described in this article is the usage of the interferometer as a security and monitoring component, which offers a solution for securing of closed spaces, especially before unwanted entries. Its primary task is to detect intrusions-disrupting the integrity of the transparent window area due to vibration response. The base of the solution is a Mach-Zehnder interferometer, which consists of two arms in the power distribution ratio of 1:1, consisting of the SM optical fiber excited by a DFB laser. The interferometer is working on the wavelength of 1550 nm. The resulting signal is registered as a result of interference of optical beams from the reference and sensor arm. Realized measuring scheme was terminated optical receiver comprising PbSe detector. Below described experimental measurements have shown that implemented interferometer has a sufficient value of the signal to noise ratio (SNR) and is able to detect very weak signals in a wide frequency range from tens of Hz to kHz units. The signal was processed by applications developed for the amplitude-frequency spectrum. Evaluated was the maximum amplitude of the signal and compared to the noise. The results were verified by retesting the assembled prototype.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

JA - Electronics and optoelectronics

OECD FORD branch

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Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2016

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

Proceedings of SPIE - The International Society for Optical Engineering

ISBN

978-1-5106-0144-4

ISSN

0277-786X

e-ISSN

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Number of pages

9

Pages from-to

1-9

Publisher name

SPIE-The International Society for Optical Engineering

Place of publication

Bellingham

Event location

Brussels

Event date

Apr 3, 2016

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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