Photonic Device Characterization for Frequency Comb Generation and Orbital Angular Momentum Applications
Abstract
ABSTRACT: Orbital angular momentum (OAM) can express itself by creating a uniquelystructured traveling vortex beam, such that the spatial phase front ???twists??? in a helical fashion as it propagates. The value of OAM depends on the number of 2?? phase shifts that occur in the azimuthal direction of a cross-section of the twisting wave. Different amounts of phase twists can form a set of orthogonal beams (i.e., modes). A secure marine-based quantum key distribution can transmit more than one bit of secure information per photon by encoding in both the transverse degree of freedom and the polarization degree of freedom. As a complete set of orthonormal modes, OAM is of interest for the transverse degree of freedom. This approach allows unlimited number of bits of information to be impressed onto a single photon. Therefore, the rate of data transmission is increased and the security of the protocol is enhanced.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Jul 10, 2018
- Source ID
- N000141812352
Entities
People
- Alan E. Willner
Organizations
- Office of Naval Research
- United States Navy
- University of Southern California