Non-line-of-sight optical wireless communication system enabled by wavefront shaping for multi-user indoor access.
Opt Lett
; 49(11): 3082-3085, 2024 Jun 01.
Article
em En
| MEDLINE
| ID: mdl-38824333
ABSTRACT
In this Letter, we experimentally investigate a non-line-of-sight (NLOS) optical wireless communication (OWC) system that utilizes wavefront shaping techniques to realize simultaneous data transmission for multiple users. Wavefront shaping techniques are employed to address the issue of low intensity of diffusely reflected light at the receiver in NLOS scenarios for indoor high-speed access. To achieve communication path planning and tracing for two different users in free-space optical communication, the pixels of the spatial light modulator (SLM) are divided into two halves to separately manipulate the wavefront of two independent data carriers centered at different wavelengths. The maximum received optical power can be effectively improved by more than 15â
dB with the wavefront shaping technique. To avoid power enhancement of non-target wavelength, the wavelength difference of two different users is experimentally studied. The difference in power enhancement ratio (DPER) is increased with the wavelength difference, and 14.95â
dB DPER is obtained with a 10â
nm wavelength difference. Under the aforementioned wavelength planning strategy, successful transmission and reception of 2 × 160â
Gbit/s 16-QAM signals for two users with coherent detection is achieved using wavelengths of 1550 and 1560â
nm in an indoor access scenario.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Ano de publicação:
2024
Tipo de documento:
Article