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. 15, 2019
Filed:
Jul. 19, 2018
Finisar Corporation, Horsham, PA (US);
Robert Lewen, Tyreso, SE;
Andrei Kaikkonen, Jarfalla, SE;
Christopher Daunt, Solna, SE;
Marek Chacinski, Farsta, SE;
Finisar Corporation, Horsham, PA (US);
Abstract
An electro-optical modulator includes a substrate comprising a first Mach-Zehnder modulator comprising a first waveguide and a second waveguide and a second Mach-Zehnder modulator comprising a first waveguide and a second waveguide. A first positive signal electrode is positioned on the substrate over the first waveguide of the first Mach-Zehnder modulator and a first negative signal electrode is positioned on the substrate over the second waveguide of the first Mach-Zehnder modulator. The first positive signal electrode and the first negative signal electrode are connected to a first differential signal input. A second positive signal electrode is positioned on the substrate over the first waveguide of the second Mach-Zehnder modulator and a second negative signal electrode positioned on the substrate over the second waveguide of the second Mach-Zehnder modulator. The second positive signal electrode and the second negative signal electrode are connected to a second differential signal input. A first ground electrode is positioned on the substrate between the first and second Mach-Zehnder modulators connected to ground potential. A second ground electrode is connected to ground potential and positioned on the substrate adjacent to the first Mach-Zehnder modulator such that the first positive signal electrode and the first negative signal electrode are between the second ground electrode and the first ground electrode. A third ground electrode is connected to ground potential and positioned on the substrate adjacent to the second Mach-Zehnder modulator such that the second positive signal electrode and the second negative signal electrode are between the third ground electrode and the first ground electrode. A plurality of first electrical connectors connect the first ground electrode to the second ground electrode and a plurality of second electrical connectors connect the first ground electrode to the third ground electrode. A spacing between at least two of the plurality of first electrical connectors is chosen to achieve a desired cross talk between an optical signal generated by the first Mach-Zehnder modulator and an optical signal generated by the second Mach-Zehnder modulator.