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Relative change measurement of physical quantities using dual-wavelength coherent OTDR

Liehr, Sascha / Muanenda, Y. S. / Münzenberger, Sven / Krebber, Katerina

We propose the use of alternating pulse wavelengths in a direct-detection coherent optical time domain reflectometry (C-OTDR) setup not only to measure strain and temperature changes but also to determine the correct algebraic sign of the change. The sign information is essential for the intended use in distributed mode shape analysis of civil engineering structures. Correlating relative backscatter signal shifts in the temporal/signal domain allows for measuring with correct magnitude and sign. This novel approach is simulated, experimentally implemented and demonstrated for temperature change measurement at a spatial resolution of 1 m.

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Relative change measurement of physical quantities using dual-wavelength coherent OTDR

Liehr, Sascha / Muanenda, Y. S. / Münzenberger, Sven / Krebber, Katerina

We propose the use of alternating pulse wavelengths in a direct-detection coherent optical time domain reflectometry (C-OTDR) setup not only to measure strain and temperature changes but also to determine the correct algebraic sign of the change. The sign information is essential for the intended use in distributed mode shape analysis of civil engineering structures. Correlating relative backscatter signal shifts in the temporal/signal domain allows for measuring with correct magnitude and sign. This novel approach is simulated, experimentally implemented and demonstrated for temperature change measurement at a spatial resolution of 1 m.

Relative change measurement of physical quantities using dual-wavelength coherent OTDR

Liehr, Sascha / Muanenda, Y. S. / Münzenberger, Sven / Krebber, Katerina

We propose the use of alternating pulse wavelengths in a direct-detection coherent optical time domain reflectometry (C-OTDR) setup not only to measure strain and temperature changes but also to determine the correct algebraic sign of the change. The sign information is essential for the intended use in distributed mode shape analysis of civil engineering structures. Correlating relative backscatter signal shifts in the temporal/signal domain allows for measuring with correct magnitude and sign. This novel approach is simulated, experimentally implemented and demonstrated for temperature change measurement at a spatial resolution of 1 m.

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Title:

Relative change measurement of physical quantities using dual-wavelength coherent OTDR

Contributors:

Liehr, Sascha (author) / Muanenda, Y. S. (author) / Münzenberger, Sven (author) / Krebber, Katerina (author)

Publication date:

2017-01-01

DOI:

https://doi.org/10.1364/OE.25.000720

Type of media:

Article (Journal)

Type of material:

Electronic Resource

Language:

English

Keywords:

Classification:

DDC: 624

Licence:

http://www.gesetze-im-internet.de/urhg/index.html

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