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:
Jul. 02, 2013
Filed:
Oct. 11, 2010
Ashish K. Verma, San Jose, CA (US);
Tsurugi Sudo, San Jose, CA (US);
Sumesh Mani K. Thiyagarajan, Fremont, CA (US);
David Bruce Young, Oakland, CA (US);
Ashish K. Verma, San Jose, CA (US);
Tsurugi Sudo, San Jose, CA (US);
Sumesh Mani K. Thiyagarajan, Fremont, CA (US);
David Bruce Young, Oakland, CA (US);
Finisar Corporation, Sunnyvale, CA (US);
Abstract
In one example embodiment, a DFB laser includes a substrate, an active region positioned above the substrate, and a grating layer positioned above the active region. The grating layer includes a portion that serves as a primary etch stop layer. The DFB laser also includes a secondary etch stop layer located either above or below the grating layer, and a spacer layer interposed between the grating layer and the active region.