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Abstract

Summary

Distributed Acoustic Sensing (DAS) with fibre-optic technology is under development as a powerful and inexpensive form of seismic data acquisition. Shaped fibres (e.g., helical-wound) mitigate broadside insensitivity, and, in principle, enable multicomponent measurements; but quantification of both of these aspects requires a maximally inclusive geometry/response model. Such a model, once assembled, can be further put to use in enabling acquisition design, for instance in proposing specific fibre shapes which can distinguish between elastic wave modes. Several benchmark fibres, straight, helical-wound, and more complex, are exposed to simple body and surface waves, and the responses are examined. Patterns in these responses lead to proposed objective functions for determination of fibre shape parameters.

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/content/papers/10.3997/2214-4609.201801628
2018-06-11
2024-04-20

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http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201801628
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Towards Discrimination of Elastic Wave Modes with Shaped DAS Fibre-optic Cables
Conference Proceedings 2018, 1 (2018); https://doi.org/10.3997/2214-4609.201801628
/content/papers/10.3997/2214-4609.201801628
/content/papers/10.3997/2214-4609.201801628
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