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Erscheinungsjahr
- 2013 (2) (entfernen)
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- Beitrag zu einem Tagungsband (2) (entfernen)
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- Englisch (2)
Schlagworte
- Femtosecond laser (2)
- OTDR (2)
- Optical fiber sensors (2)
- Backscatter measurement (1)
- OFDR (1)
- POF (1)
- Polymer optical fiber (1)
- Strain sensor (1)
We propose to use focused femtosecond laser pulses to create scattering damage in standard singlemode optical fibres as reference points for quasi-distributed sensing applications. Such sensor fibres are interrogated with incoherent optical frequency domain reflectometry (I-OFDR) technique and optical time domain reflectometry (OTDR). A performance comparison of both techniques with the clear advantage of the I-OFDR is presented as well as a quasi-distributed length change measurement application. Also dynamic measurement based on the I-OFDR technique is demonstrated on a femtosecond laser-induced sensor chain.
We propose to use focused femtosecond laser pulses to inscribe Scattering damage in the core of polymer optical fibers for interrogation as quasi-distributed sensor points by optical time domain reflectometry.
Fiber bend measurement is demonstrated on off-center inscribed sensor points and absolute temperature measurement is presented by evaluation of the constant backscatter intensities from the inscribed structures relative to temperature-dependent Rayleigh Scattering. Application possibilities and limitations of this new approach are discussed.