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, 2011
Filed:
Jul. 07, 2009
Yung-chieh Hsieh, San Jose, CA (US);
Yung-Chieh Hsieh, San Jose, CA (US);
Optoplex Corporation, Fremont, CA (US);
Abstract
An exemplary optical hybrid includes a 50/50 un-polarized beam splitter, a folding prism, a beam shifter, a spacer and a phase shifter such that from an input S-beam (signal) and an L-beam (reference), four outputs, S+L, S−L, S+jL and S−jL, are produced. The phase difference between the two components of each output beam produced by the S and L beams in the optical hybrid is θ+0, θ+90, θ+180, or θ+270 degrees, where θ is the phase difference of the signal beam with respect to the reference beam. In an alternative embodiment, the phase difference between the two components of each output beam produced by the S and L beams in the optical hybrid is θ+0, θ+X, θ+180, or θ+180+X degrees, where X is an arbitrary number of degrees greater than 0 and smaller than 180.