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Fiber-optic sensing

Optical fibers are well suited for deployment in boreholes as they can tolerate harsh environments, i.e. high pressures and temperatures, or strongly corrosive media, and are immune to electromagnetic interference. The following conference article contains an overview of important projects and publications:

Henninges, J., J. Götz, P. Jousset, S. Lüth, and T. Reinsch (2017), New methods in geophysical exploration and monitoring with DTS and DAS, Proceedings, EAGE/DGG Workshop on Fibre Optic Technology in Geophysics, Potsdam, Germany, Fr SR 07, doi: 10.3997/2214-4609.201700156.

The following devices are available for fiber-optic field and laboratory experiments:

Distributed Temperature Sensing:

  • Sensa DTS 800 M10
  • Schlumberger DTS Ultra (mobile, stationary)

Interrogator HBM SI401 for FBG-based optical sensors

Light sources

  • Laser light source (C-band) Opto-Link OLS15C ASE
  • White light source Ocean Optics HL-2000-HP

Optical spectrum analyzer Yokogawa AQ6370C

Fusion splicer FITEL S178LDF and equipment

Water bath Huber K15-MPC-NR 15 l (up to 200 °C)

Oven Memmert UFE 600 256 l (up to 300 °C)

Tube furnace Cabolite TZF 12/65 (up to 1200 °C)

Measuring bridge ASL F-300 with Pt resistance thermometer

DC power supply Regatron TC.P.32.1200.400.PV (32 kW) for heat-pulse measurements

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