Optical position encoders have been invented and investigated for several decades for
precision measurement. In this article, a comprehensive survey on the optical position …

Compact interferometers, called phasemeters, make it possible to operate over a large
range while ensuring a high resolution. Such performance is required for the stabilization of …

We describe the design, fabrication, and performance of a self-referenced, optically coherent
frequency comb. The system robustness is derived from a combination of an optics package …

We demonstrate a self-referenced fiber frequency comb that can operate outside the well-
controlled optical laboratory. The frequency comb has residual optical linewidths of< 1 Hz …

A dual-comb nonlinear asynchronous optical sampling method is proposed to simplify
determination of the time interval and extend the non-ambiguity range in absolute length …

Non-contact surface mapping at a distance is interesting in diverse applications including
industrial metrology, manufacturing, forensics, and artifact documentation and preservation …

The measurement precision of frequency-modulated continuous-wave (FMCW) laser
distance measurement should be proportional to the scanning range of the tunable laser …

Flexible and stable demodulation techniques of large-scale fiber-optic Fabry–Perot (FP)
acoustic sensors are highly desirable for accelerating their industrial applications. In this …

In the field of dimensional metrology, significant technical challenges have been
encountered with regard to large-scale object assembly, satellite positioning, control of the …

Frequency-scanning interferometry (FSI) with an external-cavity diode laser (ECDL) is an
effective technology for the absolute distance measurement of a target. The measurement …