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:
Jan. 02, 2007
Filed:
Apr. 28, 2003
Xuehua Wu, Union City, CA (US);
Yuezhong Feng, Union City, CA (US);
Xixiang Chen, Oakland, CA (US);
Giovanni Barbarossa, Saratoga, CA (US);
Simon X. F. Cao, Fremont, CA (US);
Xuehua Wu, Union City, CA (US);
YueZhong Feng, Union City, CA (US);
Xixiang Chen, Oakland, CA (US);
Giovanni Barbarossa, Saratoga, CA (US);
Simon X. F. Cao, Fremont, CA (US);
Avanex Corporation, Fremont, CA (US);
Abstract
An optical apparatus functioning either as a multiplexer or a demultiplexer, including: a first polarization beam splitter (PBS); a second PBS optically coupled to the first PBS along an axis of the apparatus; a half-wave plate optically coupled between the first and second PBS; a common optical port optically coupled to the first PBS at a face intersecting the axis; a first non-common optical port optically coupled to the first PBS at a face not intersecting the axis; a second non-common optical port optically coupled to the second PBS; and a reflection interferometer optically coupled to the second PBS. The apparatus provides the benefits of using the reflection interferometer, but does not require paired reflection interferometers or Faraday rotators.