Results 251 to 260 of about 9,925 (314)

Performance of coherent optical receivers

Proceedings of the IEEE, 1990
Coherent optical communications, an area of research that shows great promise for future high-bandwidth and long-haul applications, is reviewed. Coherent optical receivers, which add light to the received signal as part of the detection process, have numerous advantages over direct-detection receivers, most notably increased sensitivity and increased ...
J R Barry, Edward A Lee
exaly   +2 more sources

Optical Superheterodyne Receiver

Applied Optics, 1967
Optical communications experiments at 6328 A, comparing the fading characteristics of coherent and noncoherent optical detection, have been performed over a 1-km real atmospheric path in different weather conditions. The results show that fading is less severe for noncoherent detection and that the fading characteristic for both types vary ...
R F, Lucy, K, Lang, C J, Peters, K, Duval   +3 more
openaire   +2 more sources

Optical OFDM and SiPM Receivers

2020 IEEE Globecom Workshops (GC Wkshps, 2020
This paper describes a new silicon photo-multipliers (SiPMs) based optical orthogonal frequency division multiplexing (OFDM) system. A SiPM is arguably the most sensitive optical detector which contains an array of single-photon avalanche diodes (SPADs) and each SPAD is able to detect single photons.
Cuiwei He, Zubair Ahmed 0004, Steve Collins   +2 more
openaire   +1 more source

Improved Receivers for Optical Wireless OFDM: An Information Theoretic Perspective

IEEE Transactions on Communications, 2022
We consider performance enhancement of asymmetrically-clipped optical orthogonal frequency division multiplexing (ACO-OFDM) and related optical OFDM schemes, which are variations of OFDM in intensity-modulated optical wireless communications. Unlike most
Jing Zhou, Nuo Huang, Wenyi Zhang
exaly   +2 more sources

Considerations for Optical Receiver Design

IEEE Journal on Selected Areas in Communications, 1983
The low dispersion and low attenuation properties of fibers between 1.3 μm and 1.6 μm make them more attractive for optical fiber transmission applications. In the absence of efficient avalanche photodiodes in this wavelength range, considerable research and development efforts on detectors as well as on the lownoise amplifier devices have been carried
openaire   +1 more source

Flexible optical receivers

2012 14th International Conference on Transparent Optical Networks (ICTON), 2012
Coherent detection has boosted the applicability of digital signal processing (DSP) in optical fibre communication systems. Based on an universal physical structure, the digital coherent receiver is compatible with a wide range of modulation formats and propagation scenarios. The key for this flexibility lies on an extensive usage of receiver-side DSP.
Armando N. Pinto, Fernando P. Guiomar
openaire   +1 more source

The EML as Coherent Optical Receiver

2017 European Conference on Optical Communication (ECOC), 2017
Phase-agnostic coherent reception of intensity modulated and OFDM signals over loss budgets of more than 30 dB is experimentally demonstrated with a commercial off-the-shelf externally modulated laser. Wavelength locking is supported for this monolithic-integrated transceiver device.
openaire   +1 more source

Phase Compensation Receivers for Optical Communication

IEEE Transactions on Communications, 1977
Phase compensation receivers are investigated in the context of optical communication, with particular emphasis on low visibility channels. It is shown that phase compensation can be viewed as a reduction of the number of spatial modes in the signal field so that an improvement in communication performance can be realized by a receiver which exploits ...
openaire   +2 more sources

The Antenna Properties of Optical Heterodyne Receivers

Applied Optics, 1966
An optical heterodyne receiver is, in effect, both a receiver and an antenna. As an antenna it has an effective aperture or capture cross section A(R)(Omega) for plane wave signals arriving from any direction Omega. The wavefront alignment between signal and local-oscillator (LO) beams required for effective optical heterodyning may be summarized in ...
openaire   +2 more sources