The major drawback of optical orthogonal frequency division multiple access (OFDM) system is their inherent intensity noise and peak average power ratio (PAPR). We introduce a new direct detection receiver based on PAPR reduction for optical OFDMA systems that maintains greater noise mitigating and leaves spectral efficiency unchanged. Unlike standard receivers, our scheme does not filter the d...

A centralized optical processing unit (COPU) that functions both as a wavelength converter (WC) and optical burst equaliser in a 10 Gb/s wavelength-converting optical access network is proposed and experimentally characterized. This COPU is designed to consolidate drifting wavelengths generated with an uncooled laser in the upstream direction into a stable wavelength channel for WDM backhaul tr...

10-Gb/s Optical Receiver and VCSEL Driver in 0.13-μm CMOS Technology

A self-homodyne photonic receiver for transmitted carrier wireless links isdemonstrated. The key innovations in this photonic RF-receiver are the design andimplementation of a resonant LiNbO3 microdisk electro-optic modulator and novelRF down-conversion techniques that exploit the sensitivity of the microdisk forefficient RF down-conversion in the optical domain. By careful RF a...

A novel 16-channel optical backplane bus with volume holographic optical elements (VHOEs), operating as diffraction grating beam alignment guides, was designed and fabricated for a high-performance computing system multi-slot bus. These thin film VHOEs were fabricated to diffract light beams for each bus slot into a glass wave-guiding plate (refractive index 1.52) for total internal reflection ...

Analytic results and conclusion: The throughput of a slotted CSMA is well known to be better than that of unslotted case. C, is always worse than C , because the previous ICMA protocol' is similar to the unslotted CSMA as the ratio of b/a becomes smaller. Both C, and C, of the ICMA scheme will be inferior by 0.368 to the slotted ALOHA, when b / a becomes larger than 6 for C, and 8 for C,, as sh...