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Design and Performance of Delivery and Coupling Switch Board for Large Scale Optical Path Cross-Connect System
Atsushi WATANABE Satoru OKAMOTO Masafumi KOGA Ken-ichi SATO Masayuki OKUNO
Publication
IEICE TRANSACTIONS on Communications
Vol.E81-B
pp.1203-1212 Publication Date: 1998/06/25 Online ISSN:
DOI: Print ISSN: 0916-8516 Type of Manuscript: Category: Optical Communication Keyword: optical communication, optical path network, cross-connect system, optical switch,
Full Text: PDF(988.1KB)>>
Summary:
This paper describes the recently developed 8 16 delivery and coupling switch (DC-switch) boards for constructing a 320-Gb/s throughput (2. 5 Gb/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 cost-effective optical path networks. The developed DC-switches exploit the silica-based planar lightwave circuit (PLC) technologies, and DC-switch board size is 300 330 mm2 (one switch). The worst values of the insertion loss of the board, ON/OFF ratio, and polarization dependent loss are 14. 5 dB, 34 dB and 0. 5 dB, respectively. Moreover, even though switching is realized by thermo-optic effects, the optical output level varies by only 0. 7 dB and 0. 8 dB for ON- and OFF-state signals, respectively, when the environmental temperature is varied from 5 to 65 .
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