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:
Jan. 04, 2005
Filed:
Dec. 31, 2001
Frank H. Peters, San Jose, CA (US);
Michael H. Leary, Fremont, CA (US);
Yoon-kyu Song, San Jose, CA (US);
Frederick A. Kish, Jr., Palo Alto, CA (US);
Frank H. Peters, San Jose, CA (US);
Michael H. Leary, Fremont, CA (US);
Yoon-Kyu Song, San Jose, CA (US);
Frederick A. Kish, Jr., Palo Alto, CA (US);
Agilent Technologies, Inc., Palo Alto, CA (US);
Abstract
An optoelectronic device such as a vertical cavity surface emitting laser (VCSEL) includes a tunnel junction that conducts a current of holes tunneling into an active region. Tunneling in a selected area of the tunnel junction is disabled to form a current blocking region that confines the current to desired regions. Tunneling can be disabled in the selected area using techniques including but not limited to implanting or diffusing dopants, disrupting crystal structure, or etching to remove part of the tunnel junction.