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:
Oct. 01, 2002
Filed:
May. 31, 2000
Simon X. F. Cao, Pleasanton, CA (US);
Olga Gorbounova, Santa Clara, CA (US);
Kenneth John Bystrom, Tracy, CA (US);
Hubert Joachim Vollmer, Tracy, CA (US);
Avanex Corporation, Fremont, CA (US);
Abstract
The present invention provides an improved wavelength division multiplexer (WDM). The WDM includes a birefringent plate; a reciprocal optical rotator optically coupled to the birefringent plate; and a diffraction grating optically coupled to the reciprocal optical rotator at a side opposite to the birefringent plate. This grating-based WDM provides very low polarization-dependent loss, and therefore, greatly reduces insertion loss. This increases the reliability of the data carried by the channels.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile