Optoelectronic circuit

Details Optoelectronic circuit Optoelectronic circuit

H - Electricity

04

J

H04J 14/02 (2006.01) G02B 6/12 (2006.01) G02B 6/42 (2006.01) H04B 10/24 (2006.01)

Patent

CA 2225135

The 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 (Figure 1) and hybrid (Figure 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 (Figure 1) and for cascadable modules for multiplexers/demultiplexers with an add-drop function (5) and enable transmission and reception to be carried out simultaneously.

L'invention concerne des circuits optoélectroniques destinés à un système de multiplexage de longueurs d'onde lumineuses et composés de coupleurs optiques (11; 39.2, 39.4) ayant chacun quatre branches (1,2,3,4; 39 1, 39.3, 2x39.5; 2x39.6, 39.3, 39.7). La diaphonie électrique et optique est réduite au minimum dans les constructions intégrées (Figure 1) et hybrides (Figure 5). A cette fin, des photodiodes (6', 6'', 36) et des diodes laser (5; 38) sont disposées sur des côtés opposés des coupleurs (11; 39.2, 39.4) et mutuellement découplées par des réseaux de diffraction sensibles à la longueur d'onde (8, 10', 10'') ou des plaques filtrantes (35). Les circuits peuvent être conçus pour fonctionnement bidirectionnel et pour des modules cascadables de multiplexeurs/démultiplexeurs avec fonction d'insertion-extraction (5), et permettent l'émission et la réception simultanément.

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