Beam shaping with tip-tilt varifocal mirror for indoor optical wireless communication

Indoor optical wireless communication systems and networks

Welcome to this Special Issue on Indoor Optical Wireless Communications, in which we explore recent research and development in the area. There is an increasing demand for ultra broadband wireless access networks and the wireless multimedia applications and video which exploit their capability, coming from end users such as hospitals, teaching environments, and retailers. Currently there are tw...

Indoor optical wireless communication systems and networks

Welcome to this Special Issue on Indoor Optical Wireless Communications, in which we explore recent research and development in the area. There is an increasing demand for ultra broadband wireless access networks and the wireless multimedia applications and video which exploit their capability, coming from end users such as hospitals, teaching environments, and retailers. Currently there are tw...

Optical metasurfaces for polarization-controlled beam shaping.

We have developed multifunctional optical beam shapers based on plasmonic metasurfaces. The metasurfaces are composed of subwavelength-spaced polarization- and wavelength-selective optical nanoantennas that allow encoding several beam shapers on a single element. We demonstrate numerically and experimentally beam shapers that can be used to switch between arbitrary beam shapes. We specifically ...

MIMO MC-CDMA Systems over Indoor Optical Wireless Communication Channels

Tip-tilt mirror suspension: beam steering for advanced laser interferometer gravitational wave observatory sensing and control signals.

We describe the design of a small optic suspension system, referred to as the tip-tilt mirror suspension, used to isolate selected small optics for the interferometer sensing and control beams in the advanced LIGO gravitational wave detectors. The suspended optics are isolated in all 6 degrees of freedom, with eigenmode frequencies between 1.3 Hz and 10 Hz. The suspended optic has voice-coil ac...