Coarse wavelength division multiplexing optical system

Details Coarse wavelength division multiplexing optical system Coarse wavelength division multiplexing optical system

1997-08-20

1999-08-24

Palmer, Phan T. H.

Optical waveguides

With optical coupler

Plural

385 16, 385 17, 359109, 359111, G02B 628

Patent

active

059434562

ABSTRACT:
A substrate is provided that supports a laser array chip positioned such that the light streams emanating from the laser array are parallel to and substantially coplanar with the surface of the substrate. A plurality of apertures are formed in the substrate between the light streams for receiving a photodiode array chip. The photodiode array chip is formed as a comb-like structure where the "teeth" of the comb are aligned with and fit into the apertures formed in the substrate such that the photodiode array chip is supported perpendicular to the substrate. Located on each of the teeth of the photodiode array chip is a photodiode. The photodiodes are arranged such that when the photodiode array chip is inserted into the substrate the photodiodes are substantially coplanar with the surface of the substrate. Using such a construction, the light streams emanating from the lasers on the laser array chip are interdigitated with and coplanar with the photodiodes. Fibers or waveguides in the substrate connect to the lasers and photodiodes and extend parallel to and coplanar with one another such that adjacent fibers or waveguides can be simply connected to the inputs of a CWDM coupler. The optical module of the invention can be mounted on an interface card to provide high density line cards required in fiber based telecommunications networks.

REFERENCES:
patent: 4943136 (1990-07-01), Popoff
patent: 5345524 (1994-09-01), Lebby et al.
patent: 5568575 (1996-10-01), Sato
patent: 5745270 (1998-04-01), Koch

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