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. 03, 2020
Filed:
May. 04, 2020
Trustees of Boston University, Boston, MA (US);
Siddharth Ramachandran, Boston, MA (US);
Gautam Prabhakar, Boston, MA (US);
Aaron G. Peterson-Greenberg, Cambridge, MA (US);
Trustees of Boston University, Boston, MA (US);
Abstract
A system comprises an electromagnetic radiation source, a polarizing element, a mode converter, an optical fiber, and a measurement device. The polarizing element receives electromagnetic radiation produced by the electromagnetic radiation source and outputs linearly-polarized electromagnetic radiation having a linear polarization angle θ. The mode converter converts the linearly-polarized electromagnetic radiation to an orbital angular momentum (OAM) mode of linearly-polarized electromagnetic radiation with topological charge L. The OAM mode of linearly-polarized electromagnetic radiation is a superposition of first and second OAM modes with topological charges Land opposite circular polarizations. The optical fiber supports propagation of the first and second OAM modes with an absolute effective index difference Δngreater than or equal to 5×10, such that linearly-polarized electromagnetic radiation with linear polarization angle θis emitted by the optical fiber. The measurement device is configured to determine a property of the electromagnetic radiation based on the polarization angle θ.