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:
Sep. 06, 2011
Filed:
Sep. 11, 2008
Alex Behfar, Irvine, CA (US);
Malcolm Green, Lansing, NY (US);
Norman Kwong, San Marino, CA (US);
Cristian Stagaresen, Ithaca, NY (US);
Alex Behfar, Irvine, CA (US);
Malcolm Green, Lansing, NY (US);
Norman Kwong, San Marino, CA (US);
Cristian Stagaresen, Ithaca, NY (US);
Binoptics Corporation, Ithaca, NY (US);
Abstract
A semiconductor chip has at least two DFB etched facet laser cavities with one set of facets with AR coatings and a second set of etched facets with HR coatings that have a different relative position with respect to the gratings. This creates a difference in the phase between each of the etched facets and the gratings which changes the operational characteristics of the two laser cavities such that at least one of the lasers provides acceptable performance. As a result, the two cavity arrangement greatly improves the yield of the fabricated chips.