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, 2001
Filed:
Jul. 08, 1998
Joanna Claire Morey, Bicester, GB;
Matthew Peter Shaw, Oxford, GB;
James Stuart McKenzie, Uxbridge, GB;
Bookham Technology Ltd., Oxfordshire, GB;
Abstract
The polarizer is formed on a silicon rib waveguide (,) having an upper face and two side faces, and comprises a section of the silicon rib waveguide (,) with a buffer layer (,) and a light absorbing layer (,) on either the upper face of the rib or at least one side face of the rib. The buffer layer (,) has a refractive index similar to that of the waveguide (,) such that light traveling along the waveguide (,) and incident upon the respective face thereof passes into the buffer layer (,) and then into the light absorbing layer (,) so either the TM (transverse magnetic) or TE (transverse electric) mode of the light traveling along the waveguide is attenuated.