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:
Apr. 10, 2001
Filed:
Jun. 19, 1998
Norbert Keil, Berlin, DE;
Huihai Yao, Berlin, DE;
Crispin Zawadzki, Berlin, DE;
Hans-Peter Nolting, Berlin, DE;
Abstract
For reducing power consumption and cross-talk in the transmission of broadband optical signals without prior conversion into electrical signals there are provided in a thermo-optical switch two waveguides (WL,and WL,) extending closely adjacent each other over their interactive length the width of which is at least partially covered by one or two pairs of lamellate electrode arms of a heating electrode (E), the arms of each pair being interconnected by a common web (G) and being of similar geometric shape as the waveguides (WL,and WL,) positioned below them. Furthermore, means is provided for changing and/or setting the thermal and/or geometric symmetry/asymmetry of the refractive indices in the two waveguides.