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:
Jun. 28, 2016
Filed:
Dec. 30, 2011
Radhakrishnan L. Nagarajan, Cupertino, CA (US);
Masaki Kato, Palo Alto, CA (US);
Michael Francis Van Leeuwen, Bethesda, MD (US);
Timothy Butrie, Hellertown, PA (US);
Radhakrishnan L. Nagarajan, Cupertino, CA (US);
Masaki Kato, Palo Alto, CA (US);
Michael Francis Van Leeuwen, Bethesda, MD (US);
Timothy Butrie, Hellertown, PA (US);
Infinera Corporation, Sunnyvale, CA (US);
Abstract
Pairs of distributed feedback (DFB) lasers are provided on a substrate. An arrayed waveguide grating (AWG) is also provided on the substrate having input waveguides, each of which being connected to a corresponding pair of DFB lasers. The wavelengths of optical signals supplied from each pair of DFB lasers may be spectrally spaced from one another by a free spectral range (FSR) of the AWG. By selecting either a first or second DFB laser in a pair and temperature tuning to adjust the wavelength, each pair of DFB lasers can supply optical signals at one of four wavelengths, pairs of which are spectrally spaced from one another by the FSR of the AWG. A widely tunable transmitter may thus be obtained.