| 摘要 |
PCT No. PCT/DE96/01129 Sec. 371 Date Dec. 19, 1997 Sec. 102(e) Date Dec. 19, 1997 PCT Filed Jun. 19, 1996 PCT Pub. No. WO97/00460 PCT Pub. Date Jan. 3, 1997The invention concerns optoelectronic circuits for an optical wavelength multiplexing system, the circuits being constructed with optical couplers (11; 39.2, 39.4) each having four branches (1,2,3, 4; 39.1, 39.3, 2x39.5; 2x39.6, 39.3, 39.7). Electrical and optical crosstalk is minimized both in integrated (FIG. 1) and hybrid (FIG. 5) constructions. To this end, photo diodes (6', 6''; 36) and laser diodes (5; 38) are each disposed on opposite sides of the couplers (11; 39.2, 39.4) and mutually decoupled by wavelength-selective arrangements of gratings (8, 10', 10'') or filter plates (35). The circuits can be designed for bidirectional operation (FIG. 1) and for cascadable modules for multiplexers/demultiplexers with an add-drop function (5) and enable transmission and reception to be carried out simultaneously.
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