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. 03, 2013
Filed:
Aug. 23, 2012
Connie Chang-hasnain, Palo Alto, CA (US);
Weijian Yang, Berkeley, CA (US);
Christopher Chase, Kensington, CA (US);
Forrest G. Sedgwick, Berkley, CA (US);
Connie Chang-Hasnain, Palo Alto, CA (US);
Weijian Yang, Berkeley, CA (US);
Christopher Chase, Kensington, CA (US);
Forrest G. Sedgwick, Berkley, CA (US);
The Regents of the University of California, Oakland, CA (US);
Abstract
A saturable absorber (SA) based on a high-contrast grating (HCG) having a buried layer of quantum structures for absorption, and which is particularly well suited for use in a mode-locked application. The HCG-SA provides three times the bandwidth compared with traditional DBR structures, while exhibiting a lower saturation fluence due to the field enhancement inside the grating. Varying grating bar width over one or two axis provides lensing effects on the optical output, while chirping of the period and duty cycle changes optical phase relationships. Novel VCSEL embodiments with external or internal cavities are described using the HCG-SA.