Plasmonic metafibers electro-optic modulators

Abstract

Digitalizing optical signals through electric driving signals, electro-optic modulators (EOMs) are one of the cardinal elements in modern optical communications. Most of current EOM devices are targeting on-chip integrations, which routinely suffer from high coupling losses, complex optical alignments and single-band operations. In this study, we for the first time integrate a lumped EOM device on the endfaces of a single-mode optical fiber jumper for fast amplitude modulations. Profiting from ultrathin and high quality-factor plasmonic metasurfaces, nanofabrication-friendly and highly efficient EO polymers and coupling-free connections with fiber networks, our EOM is demonstrated to allow dual-band operations (telecom O band and S band) and high-speed modulations (~1 GHz at a bias voltage of ±9 V). This work offers an avenue to ‘plug-and-play’ implementations of EO devices and ultracompact “all-in-fibers” optical systems for communications, imaging, sensing and many others.

Investigating changes in the electric field profiles of transverse modes in fibres due to bending

“…Development of optical fibre applications, including lasers and fibre amplifiers [8][9][10], control of mode instability [11][12][13][14][15], fibre sensors [16,17], material detection using evanescent fields [18], and telecommunication applications for data and information transmission [19][20][21], necessitates a comprehensive investigation into the behaviour of electric fields of fibre modes. Additionally, certain types of fibres with doughnut type or annular intensity distribution (Mode LP 02 ) can find utility in areas, such as optical tweezers [22] and scanning and treatment of internal surfaces of pipes [23,24].…”

Optical & electrochemical fiber-optic sensor: in situ detection of antibiotics with fM detection limit

“…Optical fibers exhibit numerous distinctive properties, such as compact size, lightweight, integrability, remote sensing, and high sensitivity. 17–20 Optical fiber sensors have found extensive applications in biochemical processes. 21–23 For example, Lamarca et al introduced a label-free ultrasensitive U-shaped fiber immunosensor for CIP detection in wastewater.…”