Memory effect of POF distributed strain sensor
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説明
Characteristics of plastic optical fiber (POF) as a distributed sensor are under test using a specially designed optical time-domain reflectometry (OTDR). Our system is capable for testing an ordinary POF of 1 mm in diameter up to about 120 m in length with the use of a photon counting detector. The OTDR responses are experimentally investigated for mechanical disturbance at one point along the POF such as small bending, axial strain, side loading and twisting deformation. We found that the POF sensing system can be applied for very large stain and has a memory effect due to the plastic deformation. Even after releasing the strain, we can observe the residual OTDR responses. This nature would serve a unique function as a distributed sensor which we can not achieve using silica-glass fiber system. Temperature effects on the OTDR results for POF are also studied and discussed.
収録刊行物
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- SPIE Proceedings
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SPIE Proceedings 5502 144-, 2004-06-09
SPIE