Spotlighting for visible light communications and illumination

Laser visible light communications

“…We add a lens equivalent to the blue case, and a n Figure 3 shows the results for the six cases. All cases are bandwidth constrained -including the higher bandwidth and reduced receive power laser cases (2)(3)(4)(5)(6). We use a simple bandwidth- Figure 3: Case 1 (left) is the no laser case where the LED is modulated.…”

“…VLC uses free spectrum. Signal can be directed and blocked by walls, allowing many non-interfering links to coexist in close proximity [2]. This provides security and high datarate area densities (Mb/s/m 2 ).…”

Optimisation of Lambertian order for indoor non-directed optical wireless communication

“…A more uniform power distribution is proposed in [13,14] and a reduced ISI is achieved by using a holographic diffuser. Spotlight is implemented for the high data rate transmission in [15], and the results show that indoor NLOS-OWC links employing LEDs with small divergence angles have less channel distortion than those with large divergence angles. Therefore, to achieve a higher transmission bandwidth and a more uniform power distribution, multi-cell NLOS-OWC systems are the preferred solution.…”

A hybrid Radio Frequency and broadcast Visible Light Communication system

“…Light signals also have the ability to be directed and sequestered allowing a VLC-enabled environment to transmit data in small cells and achieve high bandwidth densities (Mb/s/m 2 ). This includes cells in adjacent rooms or in a single room [4]. Additionally, heterogeneous networks -Optical Wireless (OW) and Radio Frequency (RF)-can co-exist allowing the benefits of VLC to enhance traditional RF systems by increasing system bandwidth.…”