The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 13, 2006
Filed:
Oct. 05, 2000
Takashi Tagami, Osaka, JP;
Kenichi Nakama, Osaka, JP;
Nobuyuki Komaba, Osaka, JP;
Yasunori Arima, Osaka, JP;
Yukihisa Kusuda, Osaka, JP;
Takashi Tagami, Osaka, JP;
Kenichi Nakama, Osaka, JP;
Nobuyuki Komaba, Osaka, JP;
Yasunori Arima, Osaka, JP;
Yukihisa Kusuda, Osaka, JP;
Nippon Sheet Glass Company, Limited, Tokyo, JP;
Abstract
A light demultiplexer in which a signal and a noise in each channel may be distinctly separated is provided. The light demultiplexer comprises a light-receiving element array for receiving light beams demultiplexed every wavelength from a wavelength multiplexed light beam and arranged in a straight line. The light-receiving element array includes a plurality of light-receiving elements for monitoring signals, and a plurality of light-receiving elements for monitoring noises. The light-receiving elements for monitoring signals and the light-receiving elements for monitoring noise are alternately arrayed in a straight line the direction thereof is the same as that of the arrangement of the demultiplexed light beams.