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. 19, 2005
Filed:
Oct. 30, 2003
Qi Deng, Cupertino, CA (US);
Xiwen Wang, Coram, NY (US);
Bing Zhang, San Jose, CA (US);
Liren Du, San Jose, CA (US);
Shuqing MA, Sunnyvale, CA (US);
Yonglin Huang, Milpitas, CA (US);
Qi Deng, Cupertino, CA (US);
Xiwen Wang, Coram, NY (US);
Bing Zhang, San Jose, CA (US);
Liren Du, San Jose, CA (US);
Shuqing Ma, Sunnyvale, CA (US);
Yonglin Huang, Milpitas, CA (US);
Finisar Corporation, Sunnyvale, CA (US);
Abstract
A device functions as a polarization beam combiner and an isolator. When light is transmitted in a first propagation direction, a second beam is displaced towards a first beam. The second beam has a polarization orthogonal to the polarization of the first beam, and the second beam is substantially parallel to the first beam. The polarizations of the first and second beams are rotated by a same first amount in a first rotation direction and then rotated by the same first amount in a second opposite rotation direction. The first and second beams are combined by displacing the second beam towards the first beam. The combined beam is polarized along a first plane and second plane, which is orthogonal to the first plane. When light is transmitted in a second opposite propagation direction, the device is used to provide optical isolation.