Fiber coupled waveguide grating structures

Abstract

Fabrication and characterization of the miniature device of waveguide grating-structures (WGS) on the end facet of an optical fiber are demonstrated. A layer of ZnO between the fiber and the grating structures serves as the waveguide. The fiber is used to direct the excitation light to the WGS and to carry the signal response back to the detection system. The narrow-band waveguide resonance mode tunable in the visible spectrum can be measured through the fiber in both the transmission and reflection. This nanodevice may be suitable as long-range sensors for the detection of refractive-index changes in nontransparent or toxic liquids.

Lab on Fiber Technology for biological sensing applications

“…In this context, Feng et al. have fabricated nanoscale ZnO waveguided photoresist grating structures , with period of 425 nm and modulation depth of about 200 nm. Yang and co‐workers have integrated array of nanopillars (160 nm diameter) on the fiber tip, by using photoresist as sacrificial layer for etching the fiber tip, which were then coated with silver (Ag) for achieving a SERS active platform .…”

Novel parallel array imprinting of nano-photonic structures on optical fibre facets

“…To date, demonstrations of fibre-facet nanopatterning have used interference lithography (IL), [1] electron-beam lithography (EBL) [2,3,4] and focused ion-beam lithography (FIB) [5,6] . The transfer of EBL nanostructures to fibre facets has also been demonstrated, [7,8] achieving 25 nm feature separations.…”

Fiber optic ultrasound generator using periodic gold nanopattern fabricated by focused ion beam

“…Some delicate structures on fibers are constructed using micro-electro-mechanical systems (MEMS) [21][22][23] . However, it needs mask and the resolution is in micrometer scale.…”