Adaptive holographic interferometry is a promising method for high-sensitivity phase
modulation measurements in the presence of slow perturbations from the environment. This …

An adaptive optical fiber sensor/demodulator of an optical phase modulation with a Sagnac
interferometer configuration is reported. The dynamic population grating recorded in …

A phase unwrapping method for phase-type optical fiber sensors and large-scale phase
measurement is proposed, which combines the phase demodulation of 3× 3 fiber coupler …

It is shown that the acoustically induced phase modulation of coherent light propagating
within a multimode optical fiber may be linearly detected by an interferometer employing an …

This study proposes holographic diversity interferometry (HDI), a system that combines
information from spatially dispersed plural image sensors to reconstruct complex amplitude …

In this work, we propose a highly-sensitive phase-interrogated RI sensor based on twin-core
fiber with inherent noise suppression. This is the first time that optical fiber sensing structure …

Optical fiber interferometry holds many advantages for the online measurement of high-
precision surfaces. Here, a fiber interferometer with a wavelength-scanning probe is …

We develop a new technology, which is referred to as progressive phase conjugation (PPC),
in which phase conjugation is electrically performed without requiring a coherent reference …

We describe a digital phase demodulation scheme for low-coherence interferometry-based
fiber-optic sensors by employing a simple generation of phase-shifted signals at the …

A modulation-demodulation scheme substantially enhances diffusion-dominated-adaptive-
interferometric sensitivity. The path length sensitivity is improved by converting a quadratic …