Coupling efficiency of multimode beam to fiber in atmospheric turbulence. (July 2023)

• Record Type: Journal Article
• Authors: Gökçe, Muhsin Caner; Baykal, Yahya; Ata, Yalçın
• Is Part Of: Journal of quantitative spectroscopy & radiative transfer. Volume 303(2023)
• Publication Date: 2023-07
• Subjects: Optical wireless communication -- Optical wave propagation -- Multimode beam -- Fiber optics -- Single-mode fiber -- Fiber coupling efficiency; Spectrum analysis -- Periodicals; Radiation -- Periodicals; Analyse spectrale -- Périodiques; Rayonnement -- Périodiques; Radiation; Spectrum analysis; Periodicals; 543.0858
• DOI: 10.1016/j.jqsrt.2023.108590
• Languages: English
• ISSNs: 0022-4073

Abstract

Highlights: Mutual coherence function for multimode incidence is derived. Received optical power on the coupling lens and the fiber core are derived. Fiber coupling efficiency is investigated for multimode incidence in turbulence. Abstract: Atmospheric turbulence causes wavefront distortions in the propagated laser beam. By the beam shaping of the transmitted laser, wavefront distortions can be mitigated effectively. In this paper, we consider a shaped laser modeled by multimode beams at the transmitter and investigate the coupling of the light wave to a single-mode fiber under the atmospheric turbulence effect. We derive the light power on the coupling lens and light power accepted by the fiber core using the extended Huygens-Fresnel principle. Then, the fiber coupling efficiency (FCE) is scrutinized for different system parameters such as the number of modes of the transmit laser, link distance, structure constant of atmosphere, focal length and radius of the coupling lens, wavelength, source size, and the number of speckles (NOS).