An introduction to self-mixing interferometry with an application to vibrometry.

摘要

Self-mixing interference occurs in a laser diode when a portion of its output is fed back into itself. This paper discusses the physics behind the self-mixing interference in a laser-diode and compares a theoretical analysis with experimental data with good agreement. A simple low-cost non-contact laser-diode vibrometer using self-mixing interference and servo-action is built for under