Optical EngineeringOptical feedback interferometry for sensing application
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We review laser diode feedback interferometry as a general tool for sensing applications. After outlining the basic principles and the theoretical approaches used to describe the phenomenon, we present a few selected examples of applications in interferometry, as developed by various groups in recent years, such as a displacement sensor, a veloci- meter or vibration sensor, and an absolute distance meter or range finder and angle sensor. Experimental results are also reported as an illustration.