Show simple item record

dc.contributor.authorChin, Sanghoon
dc.contributor.authorDenis, Séverine
dc.contributor.authorKundermann, Stefan
dc.contributor.authorBrasch, Victor
dc.contributor.authorLecomte, Steve
dc.identifier.citationOptics Express, Vol. 30, Issue 11, pp. 18090-18097 (2022)en_US
dc.description.abstractA digital optical phase-locked loop (OPLL) has been implemented to develop a distributed Brillouin sensing system in optical fibers. In our experiment, two commercial semiconductor lasers are phase-locked to each other with a highly flexible offset frequency using field programmable gate array (FPGA)-based electronics. Then, the difference frequency between the two lasers is highly stabilized and scanned by a desired step frequency in the vicinity of the Brillouin frequency of standard single-mode optical fibers. Consequently, the distribution of Brillouin frequency shift over a 50 km-long sensing fiber has been successfully measured by a very simple and low-cost Brillouin optical time-domain reflectometry (BOTDR) sensing system without any penalty in the sensing performance. The measurement repeatability at 50 km position of sensing fiber with a 5 m spatial resolution was measured be 4.5MHz under fast measurement conditions: the number of trace averaging of 2000 and the frequency scan step of 12.8 MHz, showing the figure-of-merit of 3.0.en_US
dc.description.sponsorshipCentre Suisse d’Electronique et de Microtechnique S.A. CSEMen_US
dc.subjectoptical time-domain reflectometryen_US
dc.subjectdistributed optical fiber sensingen_US
dc.subjectoptical phase-locked loopen_US
dc.subjectStimulated Brillouin scatteringen_US
dc.titleDigital OPLL-based distributed Brillouin sensing system in optical fibersen_US
dc.type.csemresearchareasIndustry 4.0en_US
dc.type.csemresearchareasScientific Instrumentationen_US
dc.type.csemresearchareasEnergy Harvestingen_US

Files in this item


This item appears in the following Collection(s)

  • Research Publications
    The “Research Publications” collection provides bibliographic information for scientific papers including conference proceedings and presentations.

Show simple item record