A short length of optical fiber that filters out a particular wavelength. Periodically spaced zones in the fiber core are altered to have different refractive indexes slightly higher than the core.

Optical signal transmission can be significantly improved by limiting the wavelength of transmitted signals. Fiber Bragg grating (FBG) is a technique widely used in optical communication, sensing, and ...

Fiber sensing scientists from Shenzhen University have developed an encrypted fiber optic tag that can be used for all-optical labeling and recognition of optical transmission channels such as access ...

The use of surface plasmon resonance (SPR) 1,2 for gas detection and biosensing dates back to 1982 (refs 3, 4). Since then, we have witnessed considerable research activities aimed at the development ...

A new design of external cavity laser allows sensors to penetrate applications where reliability and lower cost are essential. Tim Hayes speaks to Radu Barsan to learn more. The advantages of ...

A fibre-based source of near-ideal Bessel beams will be crucial for applications that require remote beam delivery as well as diffraction-free propagation. Scientists at OFS Laboratories in Somerset, ...

The R-OPO fibre sensor enables real-time strain and temperature monitoring over 25 km, enhancing infrastructure safety with high sensitivity and resolution.