Optical humidity sensors have evolved through decades of research and development,
constantly adapting to new demands and challenges. The continuous growth is supported …

Micro-/nanofibers (MNFs) are optical fibers with diameters close to or below the wavelength
of the guided light. These tiny fibers can offer engineerable waveguiding properties …

An optical micro/nanofiber (MNF) is a quasi-one-dimensional free-standing optical
waveguide with a diameter close to or less than the vacuum wavelength of light. Combining …

The monitoring of proximity-contact events is essential for human–machine interactions,
intelligent robots, and healthcare monitoring. We report a dual-modal sensor made with two …

Optical waveguides and integrated optical devices are promising solutions for many
applications, such as medical diagnosis, health monitoring and light therapies. Despite the …

Monitoring the dynamic humidity requires sensors with fast response and anti-
electromagnetic interference, especially for human respiration. Here, an ultrafast fiber-optic …

A high sensitivity optical fiber loop-based relative humidity (RH) sensor coated with polyvinyl
alcohol (PVA) film is demonstrated, which has low-temperature sensitivity. The loop region …

Localized surface plasmon (LSP) excitations provide an efficient strategy for advancing
nanophotonic designs and applications where strong field enhancement and confinement …

In this paper, a relative humidity (RH) Vernier sensor based on gelatin diaphragm is
proposed, in which the gelatin diaphragm is coated on the end surface of the quartz capillary …

A simple in-fiber breathing monitoring sensor based on a micro-tapered long-period fiber
grating (MT-LPFG) structure was proposed and demonstrated. The MT-LPFG structure was …