Actual MAC protocols show a lack of performances when dealing with high bit rate networks. On the other hand, WDM multichannel systems will allow for a better use of the huge bandwidth of fiber optic media. In this paper, we introduce a new CSMA/CD protocol for mul-tichannel optical LANs, based on the Ethernet standard. The key issues of this protocol are the network load and the wavelength swa...

Abstract Media access control protocols for an optically interconnected star-coupled system with pre-allocated Wavelength Division Multiple Access channels are introduced and compared. The photonic network is based on a passive star-coupled configuration where high topological connectivity is achieved with low complexity and excellent fault-tolerance. The channels are pre-allocated to the nodes...

We present the architecture and code design for a highly scalable, 2.5 Gb/s per user optical code division multiple access (OCDMA) system. The system is scalable to 100 potential and more than 10 simultaneous users, each with a bit error rate (BER) of less than 10. The system architecture uses a fast wavelength-hopping, time-spreading codes. Unlike frequency and phase sensitive coherent OCDMA s...

In this paper, we provide an analysis to the performance of optical time-wavelength code-division multiple-access (OTW-CDMA) network when the system is working above the nominal transmission rate limit imposed by the passive encoding-decoding operation. We address the problem of overlapping in such a system and how it can directly affect the bit error rate (BER). A unified mathematical framewor...

This paper introduces a preallocation-based multiple access protocol for wavelength-division multiplexed (WDM) optically interconnected passive star-coupled networks. The objective is to combine the strengths of two other preallocation-based strategies, interleaved slotted ALOHA (I-SA) and interleaved time division multiple access with multiple buffers (I-TDMA*), while minimizing their inherent...

We demonstrate electrically pumped lasers on silicon that produce pulses at repetition rates up to 40 GHz. The mode locked lasers generate 4 ps pulses with low jitter and extinction ratios above 18 dB, making them suitable for data and telecommunication transmitters and for clock generation and distribution. Results of both passive and hybrid mode locking are discussed. This type of device coul...

P. Susthitha Menon Universiti Kebangsaan Malaysia Institute of Microengineering and Nanoelectronics 43600 UKM Bangi, Selangor, Malaysia Abstract. The transmission of both optical code division multiple-access (OCDMA) and wavelength division multiplexing (WDM) users on the same band is investigated. Code pulses of spectral amplitude coding (SAC)/optical code division multiple-access (CDMA) are o...