High-speed integrated transceivers for optical wireless

Abstract

Optical wireless LANs have the potential to provide bandwidths far in excess of those available with current or planned RF networks. There are several approaches to implementing optical wireless systems, but these usually involve the integration of optical, optoelectronic, and elec-I Figure 5. Demonstration system optomechanics. Transmitter optomechanics Receiver optomechanics Detector array flip-chip bonded to CMOS integrated circuit Ceramic package Ceramic package Source array flip-chip bonded to CMOS integrated circuit

Two-dimensional binary halftoned optical intensity channels

“…This is a quantization noise-limited system. rate as in (16). Additionally, larger values of a lead to high channel capacities.…”

“…However, the capacity saturates to a limiting value as N increases. This is due to the fact that, although the number of channels increases as N 2 , the signal-to-noise ratio (proportional to ρ 2 ) decreases at the same Table 1, and ρ as given by (16). This is an optical power-limited system.…”

“…This is an optical power-limited system. Table 1, and ρ as given by (16). This is a quantization noise-limited system.…”

“…Examples of imaging-type receivers are arrays of photodiodes, charge coupled device (CCD) cameras, and CMOS imagers. Several such arrays have been constructed for free-space and indoor wireless optical communications [15,16], as well for high-speed imaging applications with rates near 10 kframes/s for arrays of over 10 5 pixels [17].…”

Chip-to-chip optical wireless link feasibility using optical phased arrays on silicon-on-insulator

“…This will thus need other receiver design including collective optics for example to improve the link budget. Such an approach using an integrated receiver array with a lens on top is shown in [11]. The OPAs can still act as steerable transmitters.…”