A grating interferometer, called the “optical encoder,” is a commonly used tool for precise
displacement measurements. In contrast to a laser interferometer, a grating interferometer is …

The unique diffractive properties of gratings have made them essential in a wide range of
applications, including spectral analysis, precision measurement, optical data storage, laser …

We propose a sensor based on the integration of self-mixing interference (SMI) with
microfiber, for human health monitoring. Through the power variation of the reflected light …

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 …

The use of ultrasonic elastic waves is a well established technique for non-destructive
testing of materials and structures, in particular to exploit the interaction of waves with …

Laser self-mixing interferometry (SMI) is a powerful measurement technique with high
sensitivity and subwavelength precision. However, the simultaneous detection of multi …

The effects of the retroreflector's motion errors on the measurement accuracy of a miniature
laser diode interferometer (MLDI), which is designed as a displacement feedback device for …

The Young's modulus and internal friction are two important parameters of materials. Self-
mixing interferometry (SMI) is an emerging non-destructive sensing method that has been …

Fiber Bragg grating (FBG) is considered a good candidate for acoustic emission (AE)
measurement. The sensing and measurement in traditional FBG-based AE systems are …

In this letter, we proposed an innovative laser self-mixing interferometer (SMI) with a
reflection-type two-dimensional (2D) grating for three-dimensional (3D) dynamic …