Abstract: The multimode fiber (MMF) speckle sensor applied to measure the refractive index (RI) of liquid analyte is investigated. The change of refractive index is detected by the changes of speckle ...
Abstract: We present long-range strain measurements using phase-noise-compensated optical frequency domain reflectometry (PNC-OFDR) over 1.5 km with a strain range of 1000 μϵ. In conventional OFDR, ...