The size and length of the wire used can be flexibly changed depending on the size of stone or wire you have. * With this technique you can apply to most stone shapes, suitable for flat stones or ...

Abstract: The measurement distance is one of the most important parameters for distributed acoustic sensor (DAS). In this paper, we report a long-distance and high-sensitivity DAS system based on time ...

Abstract: This paper describes the design, fabrication, and record performance of a new class of ultra-wideband wavelength tuning, ultra-low noise semiconductor laser, the Integrated Coherent Tunable ...