1.
Appl Opt
; 62(33): 8780-8785, 2023 Nov 20.
Article
in English
| MEDLINE
| ID: mdl-38038023
ABSTRACT
We describe a free-space optical communications system operating with an externally modulated infrared carrier signal at 1550 nm. The purpose of the system is to explore an alternative to radio-frequency wireless communications, which are subject to spectral congestion and bandwidth limitations. We provide details of the optical alignment procedure and a means for extrapolating the obtained results to larger transmission distances. To illustrate the versatility of the system, a relatively wideband signal was chosen for transmission: an NTSC analog video signal, whose instantaneous bandwidth was 6 MHz. We describe the performance of the system by examining its output image quality and signal-to-noise ratio.