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. 07, 1998
Filed:
Feb. 13, 1996
Johannes Willem Hofstraat, Doetinchem, NL;
Marinus Cornelis Flipse, Zutphen, NL;
Richard Herman Woudenberg, Rotterdam, NL;
Akzo Nobel N.V., Arnhem, NL;
Abstract
The present invention provides an electro-optical device comprising NLO polymer in the active layer with improved stability for light in the wavelength range of 600-1600 nm is guided through the device. The present invention is directed to an electro-optical device comprising two cladding layers and an active layer sandwiched between these cladding layers, with the active layer comprising a non-linear optically active side chain polymer with NLO-chromophores having an N-donor-delocated .pi. system-acceptor structure, the N-donor not being bonded directly to alkyl groups. There are two ways to create NLO-chromophores with N-donors which do not have adjacent linear alkyl groups: The first way is to bond one or two aromatic groups. The N-atom is further bonded to the delocated .pi. system. If only one aromatic group is present, the N-atom is, besides the delocated system, further bonded to a hydrogen or deuterium atom. The second way of avoiding adjacent alkyl groups is to employ an N-donor moiety wherein no adjacent linear alkyl groups are present.