Mechanical Properties of a Fiber Optic Magnetostrictive Sensor Element.Development of an Experimental Technique

摘要

This report describes the results of an experimental study that, to the knowledgeof the author, for the first time demonstrates that electronic speckle pattern interferometry, ESPI, is a useful technique for investigation of the mechanical vibration mode patterns of the magnetostrictive sensor element in a fiberoptic magnetometer. The operation of the magnetometer is based on the nonlinear interaction between the ambient low frequency magnetic field to be measured, the