150  m/280  Gbps WDM/SDM FSO link based on OEO-based BLS and afocal telescopes

Abstract

A 150 m/280 Gbps free-space optical (FSO) link based on an optoelectronic oscillator (OEO)-based broadband light source (BLS), afocal telescopes, and wavelength-division-multiplexing (WDM)/space-division-multiplexing (SDM) convergence is proposed. Experimental results show that the transmission distance of FSO links is significantly increased by afocal telescopes, and the transmission rate of FSO links is greatly enhanced by WDM and SDM convergence. With the aid of a low noise amplifier and clock/data recovery, good bit error rate performance and a clear eye diagram are achieved at 150 m/280 Gbps operation. This proposed 150 m/280 Gbps WDM/SDM FSO link is shown to be a prominent alternative not only because of its advancement of indoor FSO communications but also because of the advantages of optical wireless communications for a long transmission distance and high transmission rate.

A combined fibre/free-space-optical communication system for long-haul wireline/wireless transmission at millimetre-wave/sub-THz frequencies

“…If each MMW/sub-THz frequency carries its own data, then there will be crosstalk that arises from the adjacent wavelengths. The generation of crosstalk will reduce the transmission performance 20 . Moreover, multiple OFDM transmitters or complex filtered-OFDM modulation 21 are needed to build such a combined fiber/FSO communication system at MMW/sub-THz frequencies.…”

The Multiparameter Measurement Technique in a Large-Aperture Rectangular Laser Beam Aberration Correction System

“…The common-aperture telescope is actually a system that compresses the beam aperture. The optical system for beam compression [16] is a nonfocal telescope system [19] with a 160 mm × 120 mm aperture and a 200-mm-equivalent circular aperture. Although the detected beam has a rectangular aperture, we design the optical system based on the diameter of the outer circle of the rectangular aperture.…”

Performance of Free-space Optical Communication Systems using Optical Amplifiers under Amplify-forward and Amplify-received Configurations

“…To the best of our knowledge, FSO communication systems have been developed as communication platforms that can be integrated with and support high-altitude, mobile, satellite, and terrestrial platforms [2]. With the rapid growth and increased complexity of communication systems, FSO communication systems can also be implemented in 118 wavelength division multiplexing (WDM), dense wavelength division multiplexing (DWDM), and codedivision multiple access [3]- [5]. The numerous modulation formats for transmitters have been widely investigated to determine the best electrical signals or information to be transmitted out into atmospheric channels [6]- [8].…”