Comparative analysis of the DFB fiber laser and fiber-optic interferometric strain sensors

G. A. Cranch, G. M. H. Flockhart, C. K. Kirkendall

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

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Abstract

The DFB fiber laser strain sensor is shown to provide an improvement in the minimum detectable length change by a factor of 275 at 2 kHz for an applied strain when compared with an interferometric sensor interrogated by at equivalent DFB laser. This corresponds to a strain resolution enhancement by a factor of 18, if the strain is applied over, 10cm length of fiber. The ability of the fiber laser sensor to operate in its thermodynamic noise limit is shown to be the primary reason for this enhanced sensitivity. Thermodynamically limited noise performance is demonstrated with three interrogation methods.
Original languageEnglish
Title of host publicationThird European Workshop on Optical Fibre Sensors
EditorsA Cutolo, B Culshaw, JM LopezHiguera
Volume6619
DOIs
Publication statusPublished - 2007
EventThird European Workshop on Optical Fibre Sensors - Napoli, Italy
Duration: 4 Jul 20076 Jul 2007

Publication series

NameProceedings of the Society of Photo-Optical Instrumentation Engineers (SPIE)
PublisherSPIE
Volume6619

Conference

ConferenceThird European Workshop on Optical Fibre Sensors
Abbreviated titleEWOFS 07
CountryItaly
CityNapoli
Period4/07/076/07/07

Keywords

  • comparative analysis
  • DFB fiber laser
  • fiber-optic
  • interferometric strain sensors

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