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:
Oct. 28, 2014
Filed:
Aug. 09, 2011
Ying Luo, San Diego, CA (US);
Xuezhe Zheng, San Diego, CA (US);
Guoliang LI, San Diego, CA (US);
Kannan Raj, San Diego, CA (US);
Ashok V. Krishnamoorthy, San Diego, CA (US);
Ying Luo, San Diego, CA (US);
Xuezhe Zheng, San Diego, CA (US);
Guoliang Li, San Diego, CA (US);
Kannan Raj, San Diego, CA (US);
Ashok V. Krishnamoorthy, San Diego, CA (US);
Oracle International Corporation, Redwood Shores, CA (US);
Abstract
An optical de-multiplexer (de-MUX) that includes an optical device that images and diffracts an optical signal using a reflective geometry is described, where a free spectral range (FSR) of the optical device associated with a given diffraction order abuts FSRs associated with adjacent diffraction orders. Moreover, the channel spacings within diffraction orders and between adjacent diffraction orders are equal to the predefined channel spacing associated with the optical signal. As a consequence, the optical device has a comb-filter output spectrum, which reduces a tuning energy of the optical device by eliminating spectral gaps between diffraction orders of the optical device.