Measuring sensitivity of optical frequency transfers to acoustic vibrations in photonic networks

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081731%3A_____%2F22%3A00566274" target="_blank" >RIV/68081731:_____/22:00566274 - isvavai.cz</a>
Result on the web
<a href="https://www.spiedigitallibrary.org/conference-proceedings-of-spie/12502/2663961/Measuring-sensitivity-of-optical-frequency-transfers-to-acoustic-vibrations-in/10.1117/12.2663961.short" target="_blank" >https://www.spiedigitallibrary.org/conference-proceedings-of-spie/12502/2663961/Measuring-sensitivity-of-optical-frequency-transfers-to-acoustic-vibrations-in/10.1117/12.2663961.short</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1117/12.2663961" target="_blank" >10.1117/12.2663961</a>

Result language
angličtina
Original language name
Measuring sensitivity of optical frequency transfers to acoustic vibrations in photonic networks
Original language description
The fiber infrastructure in buildings can pose a security risk. Using interferometric measurement techniques, a fibre installed in a room can be turned into a sensitive microphone and thus misused for eavesdropping. In our contribution we are investigating the transfer of mechanical vibrations to the fiber in the audible frequency band. An installation of optical fiber connecting two buildings of the institute was measured using a heterodyne interferometric system. The phase changes of an ultra-narrow C-band laser working at 1540.5nm wavelength transmitted through the fiber were detected and converted to an audio signal. The power spectral density of the interference phase for audible Fourier frequencies was analyzed over a period of several working and non-working days. A practical example of post-processing the measured data for speech eavesdropping is discussed.
Czech name
—
Czech description
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Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
22nd Polish-Slovak-Czech Optical Conference on Wave and Quantum Aspects of Contemporary Optics
ISBN
978-1-5106-6112-7
ISSN
0277-786X
e-ISSN
1996-756X
Number of pages
5
Pages from-to
125020I
Publisher name
SPIE
Place of publication
Bellingham
Event location
Wojanów
Event date
Sep 5, 2022
Type of event by nationality
EUR - Evropská akce
UT code for WoS article
000920988700017

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