Design and Performance of Delivery and Coupling Switch Board for Large Scale Optical Path Cross-Connect System

概要

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This paper describes the recently developed 8×16 delivery and coupling switch(CD-switch)boards for constructing a 320-Gb/s throughput(2.5Gb/s×8 multiplexed wavelengths× 16 incoming/outgoing link pairs)optical path cross-connect(OPXC)system based on wavelength path(WP)and virtual wavelength path(VWP)schemes. The DC-switch-based OPXC system, compared with conventional space division switch(SD-switch)-based OPXC system architecture, is shown to be superior in terms of;i)high link modularity, ii)upgradability from WP network to VWP network, iii)better transmission characteristics, and iv)lower total switching power consumption. Therefore, the DC-switch-based OPXC system can realize costeffective optical path networks. The developed DC-switches exploit the silica-based planar lightwave circuit(PLC)technologies, and DC-switch board size is 300×330mm^2(one switch). The worst values of the insertion loss of the board, ON/OFF ratio, and polarization dependent loss are 14.5dB, 34dB and 0.5dB, respectively. Moreover, even though switching is realized by thermo-optic effects, the optical output level varies by only 0.7dB and 0.8dB for On-and OFF-state signals, respectively, when the environmental temperature is varied from 5 to 65℃.
社団法人電子情報通信学会の論文
1998-06-25