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. 26, 2012
Filed:
May. 25, 2006
Toshiyuki Tokura, Tokyo, JP;
Katsuhiro Shimizu, Tokyo, JP;
Kazuyuki Ishida, Tokyo, JP;
Kuniaki Motoshima, Tokyo, JP;
Toshiyuki Tokura, Tokyo, JP;
Katsuhiro Shimizu, Tokyo, JP;
Kazuyuki Ishida, Tokyo, JP;
Kuniaki Motoshima, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
A control-target-value setting unit sets a control target value corresponding to the number of multiplexed wavelengths measured by a number-of-multiplexed-wavelengths measuring unit. A controller controls the variable optical attenuator based on the control target value. An optical amplifier performs an optical amplification with a constant gain regardless of power of a wavelength-multiplexed light. The controller performs feedback control of the variable optical attenuator such that a result of measurement of the total power of the wavelength-multiplexed light coincides with the control target value.