Self-mixing interferometry (SMI) is suitable to sense and measure vibrations of amplitudes
ranging from picometers to millimeters at frequencies from sub-Hz to MHz's. As an optical …

Approaches that are, to our knowledge, novel, are proposed in this paper to improve the
accuracy performance of self-mixing interferometry (SMI) for displacement measurement …

We present a novel method by a multi-longitudinal mode laser with a waveplate to generate
two orthogonally polarized signals with stable and adjustable phase differences. The phase …

In order to reconstruct the micro-vibration quickly and easily, a novel phase unwrapping
algorithm based on multiple Hilbert transform is proposed. Hilbert transform is performed …

We report a novel and simple method to generate a pair of self-mixing signals with
quadrature phase difference in He-Ne laser by introducing a wedge into the external cavity …

Optical rangefinders based on Self-Mixing Interferometry are widely described in literature,
but not yet on the market as commercial instruments. The main reason is that it is relatively …

We present an overview of the applications of self-mixing interferometer (SMI) to tasks of
interest for mechanical engineering, namely high-resolution measurement of linear …

Laser self-mixing interferometry (SMI) is an attractive sensing scheme due to its compact,
self-align, and cost-effective nature. In this work, an SMI based compute-intensive phase …

In this paper, the inherent error as well as the robustness of a previously published
displacement retrieval technique called the phase unwrapping method (PUM) is analyzed …

The disappearance of self-mixing fringes in the moderate feedback regime decreases the
displacement measurement accuracy. The proposed method detects and compensates the …