Rotating optical beams for communications

Enrique J. Galvez; Tarik Cigeroglu; Valeria Rodríguez-Fajardo; Bill Luo

doi:10.1117/12.3004502

13 March 2024 Rotating optical beams for communications

Enrique J. Galvez, Tarik Cigeroglu, Valeria Rodríguez-Fajardo, Bill Luo

Author Affiliations +

Proceedings Volume PC12901, Complex Light and Optical Forces XVIII; PC129010E (2024) https://doi.org/10.1117/12.3004502
Event: SPIE OPTO, 2024, San Francisco, California, United States

Abstract

We prepared Poincare beams consisting of non-separable superpositions of polarization and spatial modes bearing orbital angular momentum. A geometric phase shifter varied the phase between the component polarization modes. As a consequence, the output beam projected by a polarizer carried a spatial pattern that rotated with an angular speed proportional to the difference in topological charge of the component modes and the rate of change of the phase. We investigated the encoding of information in the angular speed of the patterns for the purpose of communications. The detection of the encoded rotation consisted of two photodiodes located off center to the pattern and forming a shallow angle from the center of the beam. Their signal was used to determine the angular speeds of the patterns. We used various types of Gaussian, non-diffracting and Einstein beams in proof-of-principle communication schemes.

Conference Presentation

Citation Download Citation

Enrique J. Galvez, Tarik Cigeroglu, Valeria Rodríguez-Fajardo, and Bill Luo "Rotating optical beams for communications", Proc. SPIE PC12901, Complex Light and Optical Forces XVIII, PC129010E (13 March 2024); https://doi.org/10.1117/12.3004502

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

;

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE