Abstract: To cope with the restriction placed on the capacities of bidirectional WDM star single-hop networks by the limited number of wavelengths, a scheme of wavelength reuse is proposed in this paper. Though the network structure proposed is simple, the scheme can be easy implemented in practice. In the scheme, the number of nodes can be increased by reusing wavelengths, the delay of network can be reduced, the throughput can be increased under the same number of nodes, and the properties of network are improved. Besides, the scheme can be applied to interconnections between two bidirectional WDM star single-hop networks. In this paper, the network's structure is discussed and the properties of wavelength reuse in the network are analyzed. Furthermore, the required gain and output power of optical amplifier in it are computed. Finally, the maximum number of wavelengths utilized by the network and the maximum number of nodes supported by the network are computed.

Key words: star single-hop network, wavelength division multiplexing, network capacities, gains, wavelength reuse