We propose a method based on vortex beams, which carries optical orbital angular momentum (OAM) to achieve spatial separation of coherent signal light and incoherent noise light and conducted experiments to evaluate the effect. Based on the experimental results, we established the relationship between signal-to-noise ratio (SNR) and topological charge number, signal channel size, and then optimized the relevant parameters. We built a LIDAR system for underwater detection to verify the practical effectiveness of the method. The experimental results demonstrate a significant improvement in the SNR for underwater detection.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
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.