Table 1 Three microanchored fiber-optic cables developed for deformation sensing in the near surface environment.

From: Microanchored borehole fiber optics allows strain profiling of the shallow subsurface

  1. The optical fiber depicted in the cross-section illustration is comprised of a fiber core (silica core + cladding) and a coating. The unanchored strain sensing cables are commercially available (NanZee Sensing Ltd.): the TPU-jacketed (NZS-DSS-C07); the PE-jacketed (NZS-DSS-C02). Note that no anchor–cable interface debonding was found in any of the applications presented. TPU = thermoplastic polyurethane; PE = polyethylene. Refer to Ref.35 for a cable with special three-dimensional “dead” anchors suitable especially for detection of shear deformation such as a creeping landslide.
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