STARNET: a multi-gigabit-per-second optical LAN utilizing a passive WDM star

Abstract

We propose a new broad-band local area network, STARNET, based on a physical passive star topology. Over a single physical network, STARNET offers all users both a moderate-speed packet network and a high-speed WDM circuit interconnect. Based on these two data transport facilities, several topological and protocol solutions are available to the users. As a result, STARNET supports traffic of widely different speed and continuity characteristics. Each node of the network requires bromana O P~~C I I '°C'~'rC'nCtYork .video conferenc~ng . "laeo teiepnony remote l i~r a r y w v~c e Ipaoers, DDOk5.lmqe5) only two lasers and its structure facilitates the achievement of frequency stabilization for the whole network. An effort toward waeo racsimile i m a~ WWSDWWS imovles, ana c i a s~ magazines ) HIGH SPEED an experimental demonstration of a 3 Gb/s per node, FDDIcompatible (at the packet network level) STARNET is currently in progress at the Optical Communication Research Laboratory of Stanford University.Fig. 1. Some of today's and tomorrow's network services.

Power budget optimization of STARNET II: an optically amplified direct-detection WDM network with subcarrier control

“…While STARNET-II is functionally equivalent to the coherent STARNET-I [3], [4], the implementation of STARNET-II is much simpler. STARNET-II entire system, including combined modulation formats with subcarrier and baseband channels, electro-absorption modulator transmitter, and optical amplified (EDFA) receiver, was fully analyzed and optimized.…”

“…1 (2) shown at the bottom of the page where is the detected signal current without an optical coupler at the receiver and no subcarrier modulation, is the thermal noise, -is the signal-spontaneous noise, -is the spontaneous-spontaneous noise, -is the signal-crosstalk noise, -is the crosstalk-crosstalk noise, is the modulation depth of the control (subcarrier) data, and is the fraction of optical power split to the control receiver. The modulation depth and the splitting ratio are defined as (3) where and are the amplitudes of control and payload signals respectively, entering the hybrid coupler at the transmitter [see Fig. 1(a)], and and are the powers at the output of the optical coupler connected to the control and payload receivers, respectively [see Fig.…”

UltraFlow Access Testbed: Experimental Exploration of Dual-Mode Access Networks

“…However, all of the proposed solutions try to combine and separate an off-channel signal with the main transmission signal. In most cases, in order to provide sufficient isolation between the two channels, the off-channel signal must have a much lower data rate [15] (usually 10 times lower, depending on the requirements). Furthermore, concurrent transmissions make the cross talk between these two channels unavoidable, which leads to potentially significant power penalty.…”

Node architecture and protocol of a packet-switched dense WDMA metropolitan area network

“…To support future bandwidth-hungry Internet services where multiple interactive digital video-and voice-data and other large data files are required to be delivered over long distances, wavelength division multiple access (WDMA) is probably the most powerful technique to unlock the enormous bandwidth in optical fiber. Previous approaches to realize WDMA networks were largely confined to a star-based topology [1], [2] using a fixed-tuned transmitter and tunable receiver (FTTR) scheme, where the optical receiver at each node will receive one to all wavelength channels from the transmitting nodes. A 32-channel WDMA prototype network using DFB laser transmitters with different wavelengths was reported by the IBM researchers in [3], [4].…”