Control of Quantum Noise for Optical Sensing and Communications
Abstract
Our project aims at exploring the possibility of all-weather secure quantum communication using macroscopic quantum states of light. To this end, the project has two goals: (a) experimental investigations and mathematical modeling of the propagation characteristics of macroscopic quantum states of light owing to atmospheric turbulence, and (b) basic research on quantum receivers for cryptographic applications in harsh environments. For the former, we conducted experiments that simulated fog in a laboratory environment to investigate the propagation characteristics of visible laser light, near-infrared laser light, and single-mode squeezed light. For the latter, we discussed an optical pre-processing method to improve the reception sensitivity of optical homodyne detection. We performed a proof-of-principle experiment for a modified homodyne detection method developed by us and performed a theoretical analysis of the technique. In addition, we developed a numerical analysis method for the error probability characteristics of the optical receivers in a turbulent free-space communication channel where the transmission coefficient varies probabilistically.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 10, 2023
- Accession Number
- AD1194201
Entities
People
- Masaki Souma
Organizations
- Tamagawa University