Define the term Mach-Zchnder Interferrometer.
Mach-Zchnder Interferrometer
The Mach-Zehnder interferometer is a device utilized to find out the phase shift caused through a small sample that is placed into the path of one of two collimated beams (therefore having plane wave fronts) through a coherent light source.
Example: Optical-Fiber Infrasound Sensors
Optical-fiber infrasound sensors (OFISs) are being expended for determining acoustic pressures in the frequency range via a few millihertz to some hertz.