| 摘要 |
Apparatus for connecting a plurality of electrical circuit boards (1, 2, 3, ...N) so each electrical circuit board can communicate with each other electrical circuit board, comprising an optical circuit associated with each electrical circuit board. Each optical circuit comprises a transmitter module (T) and a receiver module (R). The transmitter module (T) comprises: a plurality of electrical to optical converters (11B) for converting electrical signals into optical signals, each of a different wavelength (# 1 ... # n ). a wavelength multiplexer (12) for multiplexing the optical signals of different wavelengths into a single optical waveguide (12A), and an optical splitter (13) for dividing the multiplexed signal in the single optical waveguide (12A) into a plurality of identical signals for transmission to each of the receiver modules (R). The receiver module (R) comprises: an optical selector (14) for selecting signals from one or more of the transmission modules (T); a wavelength de-multiplexer (21) for de-multiplexing the selected signal or signals into a plurality of signals each of a different wavelength (# 1 ... # n ), and a plurality of optical to electrical converters (22B) for converting each of the signals of different wavelengths into an electrical signal. The optical circuit comprises one or more integrated optical circuits providing: a wavelength multiplexer (12) comprising integrated directing means for directing the optical signals of different wavelengths into a single integrated optical waveguide (12A); an optical splitter (13) comprising an integrated optical waveguide which successively divides into a plurality of integrated optical waveguides (Fig. 3); an optical selector (14) comprising a plurality of integrated optical input waveguides leading to a single integrated output waveguide (15); and a wavelength de-multiplexer (21) comprising an integrated transmission or reflection grating for directing signals of different wavelengths to respective optical to electronic converters (22B).
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