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. 05, 2023
Filed:
Jan. 22, 2021
Nokia Solutions and Networks Oy, Espoo, FI;
Stefano Grillanda, Springfield, NJ (US);
Nokia Solutions and Networks Oy, Espoo, FI;
Abstract
An optical data transmitter having M serially optically connected electro-absorption modulators (EAMs) individually driven using ON-OFF-keying (OOK) electronics, where M is an integer greater than one. In an example embodiment, the optical data transmitter can be used to generate an intensity-modulated optical signal carrying symbols of a 2-level unipolar pulse-amplitude-modulation constellation. The OOK electronics enables the DC bias voltages and/or AC amplitudes of the two-level drive signals applied to different EAMs to be individually controllable to achieve desired uniform or non-uniform separation between the constellation levels. In at least some embodiments, temperatures of different EAMs may also be individually controllable. In various embodiments, the EAMs may operate in reflection or in transmission.