An ultra-short fiber Bragg grating (US-FBG) refractive index (RI) sensor is presented and demonstrated. The US-FBG is composed of a series of cascaded microchannels which carved by femtosecond (fs) ...

A robust, ultra-broadband high-speed wavelength-swept DFB laser array with 60 nm range and 82.7 kHz speed enables high-precision FBG sensor interrogation, stable even in challenging environments, with ...