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:
Oct. 20, 2015
Filed:
Aug. 20, 2013
Heider Ereifej, Chalfont, PA (US);
John L. Fiorillo, Chalfont, PA (US);
Heider Ereifej, Chalfont, PA (US);
John L. Fiorillo, Chalfont, PA (US);
Finisar Corporation, Horsham, PA (US);
Abstract
A cable television (CATV) optical transmitter includes a tunable laser having a phase bias input and a gain bias input. The tunable laser generates an optical beam at an output. A semiconductor optical amplifier includes an electrical bias input and an optical input that is optically coupled to the output of the tunable laser. The semiconductor amplifier amplifies the optical beam generated by the tunable laser. An integrated balanced modulator includes an electrical modulation input that receives analog CATV signals and an optical input that is connected to the output of the semiconductor amplifier. A third order pre-distortion circuit includes an output that is electrically connected to a modulation input of the integrated balanced modulator. The 3order pre-distortion circuit generates a signal that, when combined with the analog CATV modulation signal, at least partially cancels third order distortions that are introduced during modulation.