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. 29, 2008
Filed:
Nov. 03, 2003
Richard M Jenkins, Worcestershire, GB;
Mark E Mcnie, Worcestershire, GB;
Richard M Jenkins, Worcestershire, GB;
Mark E McNie, Worcestershire, GB;
QinetiQ Limited, London, GB;
Abstract
A hollow core multi-mode interference (MMI) device is described that comprises a multi-mode waveguide () optically coupled to at least two fundamental mode waveguides (). The device is characterised in that it comprises a means for varying the internal cross-sectional dimensions of a portion of one or more of said at least two fundamental mode waveguides. In particular, the side wall of a fundamental mode waveguide having a substantially square cross-section can be moved using micro-electro mechanical systems (MEMS). Various optical routing devices incorporating such MMI devices are described.