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:
Jul. 12, 2005
Filed:
Feb. 26, 2003
Gaozhi Xiao, Ottawa, CA;
Zhiyi Zhang, Ottawa, CA;
Zhenguo LU, Gloucester, CA;
Jiaren Liu, Kanata, CA;
Chander P. Grover, Gloucester, CA;
Gaozhi Xiao, Ottawa, CA;
Zhiyi Zhang, Ottawa, CA;
Zhenguo Lu, Gloucester, CA;
Jiaren Liu, Kanata, CA;
Chander P. Grover, Gloucester, CA;
National Research Council of Canada, Ottawa, CA;
Abstract
An integrated optical dynamic channel equalizer that can be employed to equalize the channel gain level in a WDM transmission line and monitor the optical channel performance. The device consists of a circulator, a dynamic gain equalizer chip and a controller. Due to the simplicity of the dynamic gain equalizer chip, which includes one 1×n multiplexer/demultiplexer, an n-channel variable optical attenuator array (VOA-n), a partially transparent dielectric reflective means and an n-channel detector array, the device is very compact and can be fabricated at low cost. By placing a quarter wave plate between the n-channel variable optical attenuator array and the partially transparent reflective means in the dynamic channel equalizer chip, the device can be rendered polarization insensitive.