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. 02, 2001
Filed:
May. 13, 1998
Applicant:
Inventors:
Ian Day, Old Headington, GB;
James Stuart McKenzie, Uxbridge, GB;
Assignee:
Bookham Technology PLC, Abingdon Oxfordshire, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B 6/12 ;
U.S. Cl.
CPC ...
G02B 6/12 ;
Abstract
An integrated optical circuit formed on an optically conductive substrate having light absorbing means comprising one or more doped areas (,) of the substrate where the doping concentration is greater than that of areas of the substrate forming the optical circuit (,) to absorb stray light in the substrate which is not guided by components of the optical circuit.