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:
Nov. 28, 2006
Filed:
Jan. 30, 2003
Kazue Otsuka, Kawasaki, JP;
Hiroshi Onaka, Kawasaki, JP;
Terumi Chikama, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A light branching/inserting apparatus which can easily control light signal wavelengths, and which can branch, insert or transmit light signals having an optional wavelength and optional multiplexed number, by using a wavelength selection filter utilizing acousto-optic effects. The apparatus comprises; an ADM node sectionwhich has an AOTFwith four ports as a wavelength selection filter and is connected to a transmission path, an RF signal generatorwhich generates an RF signal of an optional frequency and applies the signal to the AOTF, a selected wavelength-variable light branching sectionwhich receives and processes the light signal output from the branching port of the AOTFfor each wavelength, a light inserting sectionwhich generates an optional number of insertion light signals with optional wavelengths and sends the insertion light signals to an insertion port of the AOTF, and a monitoring sectionwhich monitors the spectrum of the light signal input/output to/from the ADM node section