A simple fiberoptic sensor to detect the penetration of microsensors into sediments and other biogeochemical systems

TY - JOUR

T1 - A simple fiberoptic sensor to detect the penetration of microsensors into sediments and other biogeochemical systems

AU - Klimant, Ingo

AU - Holst, Gerhard

AU - Kühl, Michael

PY - 1997/1/1

Y1 - 1997/1/1

N2 - We have developed a simple and mechanically robust fiberoptic microsensor that enables optical detection of the sediment-water interface at a spatial resolution of <50 μm. The sensor measures with a tapered optical fiber the increased backscatter of near-infrared light near the sediment surface. To determine the sediment surface position independent of ambient light conditions, we developed a miniaturized opto-electronic system with an intensity-modulated laser diode (780 nm) as the light source and a photodiode as the detector. Laboratory tests of our system were done with artificial as well as with various natural sediments and biofilms. Fiberoptic microsensors for surface detection can be combined easily with both electrochemical and optical microsensors for oxygen or other reactive species.

AB - We have developed a simple and mechanically robust fiberoptic microsensor that enables optical detection of the sediment-water interface at a spatial resolution of <50 μm. The sensor measures with a tapered optical fiber the increased backscatter of near-infrared light near the sediment surface. To determine the sediment surface position independent of ambient light conditions, we developed a miniaturized opto-electronic system with an intensity-modulated laser diode (780 nm) as the light source and a photodiode as the detector. Laboratory tests of our system were done with artificial as well as with various natural sediments and biofilms. Fiberoptic microsensors for surface detection can be combined easily with both electrochemical and optical microsensors for oxygen or other reactive species.

UR - http://www.scopus.com/inward/record.url?scp=0031428386&partnerID=8YFLogxK

U2 - 10.4319/lo.1997.42.7.1638

DO - 10.4319/lo.1997.42.7.1638

M3 - Journal article

AN - SCOPUS:0031428386

SN - 0024-3590

VL - 42

SP - 1638

EP - 1643

JO - Limnology and Oceanography

JF - Limnology and Oceanography

IS - 7

ER -