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:
Dec. 18, 2001
Filed:
Oct. 14, 1999
Lennart Lundqvist, Kista, SE;
Telefonaktiebolaget LM Ericsson (publ), Stockholm, SE;
Abstract
Electro-absorption modulator (EAM), of the kind that includes a waveguide, for modulation of light, comprising a waveguide core, a waveguide cladding (,), and an electrode (,), the modulator being arranged to modulate light launched into the modulator as a response to a voltage being applied on the electrode. According to the invention, the width and/or the thickness of the waveguide core (,) are/is varying along the length of the modulator. The width/thickness is smaller in the portion of the modulator where the light is intended to be input, for the purpose of reducing the absorption of the modulator there. A method in manufacturing of the modulator may utilize a tapered photolithography mask (,).
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile