We describe the history, guiding mechanism, recent advances, applications, and future
prospects for hollow-core negative curvature fibers. We first review one-dimensional slab …

Photonic crystal fibers are a kind of fiber optics that present a diversity of new and improved
features beyond what conventional optical fibers can offer. Due to their unique geometric …

A review for optical fiber bending sensors is presented. The article mainly focuses on the
measurement methods of the structure bending. Firstly, the different optical fiber bending …

An optical fiber curvature sensor based on the detection of specklegrams from the facet of
multimode fiber (MMF) is realized by using a deep learning regression model. Since the …

This paper reviews a wide variety of fiber-optic microstructure (FOM) sensors, such as fiber
Bragg grating (FBG) sensors, long-period fiber grating (LPFG) sensors, Fabry-Perot …

A simple, compact, and highly sensitive optical fiber directional bend sensor is presented.
This device consists of a lateral-offset splicing joint and an up-taper formed through …

A compact, low loss, and highly sensitive optical fiber curvature sensor is presented. The
device consists of a few-millimeter-long piece of seven-core fiber spliced between two single …

A novel curvature sensor based on optical fiber modal interferometer is demonstrated. It
consists of two peanut-shape structures that are formed only by single mode fibers. The two …

The sensitivity of multimode fibers (MMFs) to mechanical deformations has led to their
widespread use in various fields, such as structural monitoring and healthcare. However …

A novel approach for multimode fiber (MMF) curvature sensing based on the texture feature
of the specklegram from the fiber facet is proposed, developed and demonstrated. Different …