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:
Nov. 15, 2011
Filed:
Jun. 07, 2010
Connie J. Chang-hasnain, Palo Alto, CA (US);
Michael Chung-yi Huang, Taipei, TW;
YE Zhou, Shanghai, CN;
Carlos Fernando Rondina Mateus, San Jose de Campos, BR;
Connie J. Chang-Hasnain, Palo Alto, CA (US);
Michael Chung-Yi Huang, Taipei, TW;
Ye Zhou, Shanghai, CN;
Carlos Fernando Rondina Mateus, San Jose de Campos, BR;
The Regents of the University of California, Oakland, CA (US);
Abstract
A vertical cavity surface emitting laser (VCSEL) is described using a sub-wavelength grating (SWG) structure that has a very broad reflection spectrum and very high reflectivity. The grating comprises segments of high and low refractive index materials with an index differential between the high and low index materials. By way of example, a SWG reflective structure is disposed over a low index cavity region and above another reflective layer (either SWG or DBR). In one embodiment, the SWG structure is movable, such as according to MEMS techniques, in relation to the opposing reflector to provide wavelength selective tuning. The SWG-VCSEL design is scalable to form the optical cavities for a range of SWG-VCSELs at different wavelengths, and wavelength ranges.