Optical waveguides – Integrated optical circuit
Patent
1998-02-03
2000-08-15
Bovernick, Rodney
Optical waveguides
Integrated optical circuit
359124, G02B 612
Patent
active
06104847&
ABSTRACT:
A compact optical device operating as a WDM (wavelength division multiplexing) filter is provided. The optical device includes a slab optical waveguide having first and second end faces opposed to each other, a plurality of first optical waveguides connected to the first end face of the slab optical waveguide, and a plurality of second optical waveguides connected to the second end face of the slab optical waveguide. Each of the second optical waveguides includes a first cavity connected to the slab optical waveguide and a second cavity acutely connected through a first reflecting surface to the first cavity. The second cavity is terminated by a second reflecting surface. Each second cavity is so configured as to be folded back to the corresponding first cavity, so that the optical device can be made compact in setting a required optical path difference between the second optical waveguides. This optical device can be used as an optical multiplexer or an optical demultiplexer in a system adopting WDM.
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Bovernick Rodney
Fujitsu Limited
Wise Robert E.
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