Nippon Sheet Glass Company, Limited

Leandro De Castro

Hiroyuki Tanaka

Shigeo Kittaka

Takashi Fukuzawa

A filter module is provided for an optical communications system. The filter module includes a lens, three optical fibers, an optical filter, and a mirror. The three optical fibers are arranged on a single side of the lens. The lens includes a first face coated with the optical filter and that faces the mirror. The optical fibers are arranged on a second face of the lens. A cascade of the filter modules are configured to connect and form a multiplexing/demultiplexing unit.

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Osaka, Japan

Leandro De Castro