Optical waveguides – With optical coupler – Input/output coupler
Patent
1996-12-05
1999-01-12
Lee, John D.
Optical waveguides
With optical coupler
Input/output coupler
359127, 359130, 385 9, 385 24, 385 40, 385 50, 385 10, G02B 634
Patent
active
058599410
ABSTRACT:
An optical add/drop multiplexer device which is capable of extracting or inserting optical signals of arbitrary wavelength and having a wavelength selection characteristic with a narrow bandwidth, and which is compact in size and highly reliable. The device is formed by a substrate member; a plurality of optical waveguides, formed over the substrate member in layers with a prescribed interval along a direction perpendicular to a plane of the substrate member, each optical waveguide having a portion arranged in parallel and in proximity to an adjacent optical waveguide to form a coupling section; and a diffraction grating member, provided at the coupling section and having a prescribed period along a light propagation direction, for reflecting light signals with a specific wavelength among light signals entered from one of adjacent optical waveguides to another one of the adjacent optical waveguides.
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Horita Masayoshi
Matsushima Yuichi
Tanaka Shinsuke
Kokusai Denshin Denwa Kabushiki Kaisha
Lee John D.
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