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Coherent Lightwave Communications
SPIE Proceedings, 1985In this talk we will present fundamental theoretical considerations affecting the performance of coherent lightwave communication systems. These systems include a single-mode laser and a modulator at the source and a coherent receiver which is the optical onalog of a superheterodyne radio set.
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Coherent Optical Communication Technology
Optical Fiber Communication Conference, 2015This tutorial lecture discusses fundamentals of the coherent optical communication technology. It covers quantum mechanical understanding of coherent (heterodyne and homodyne) detection, optical circuits for coherent receivers, and digital signal processing for coherent communications.
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Scheme of coherent optical chaos communication
Optics Letters, 2020We propose and numerically demonstrate a scheme of coherent optical chaos communication using semiconductor lasers for secure transmission of optical quadrature amplitude modulation (QAM) signals. In this scheme, a laser intensity chaos and its delayed duplicate are used to amplitude-quadrature modulate a continuous-wave light to generate a chaotic ...
Longsheng Wang +6 more
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Coherent Optical Communication
Asia Optical Fiber Communication and Optoelectronic Exposition and Conference, 2008Optical coherent receivers with subsequent DSP show great promise as enabling technologies for ultra-high information rate optical transmission systems. DSP alleviates the need to lock the phases of the LO and transmitter signal, which is one of the limiting factors for the use of coherent receivers in the optical domain.
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Self-coherent OFDM for wireless communications
2015 IEEE International Conference on Communications (ICC), 2015In this paper, we present self-coherent OFDM, a well-known non-coherent technique in optical communications, for wireless RF communications. Self-coherent OFDM is known to have complete immunity against phase noise using a simple RF front-end receiver and to provide a significantly higher spectral efficiency than self-het OFDM, which uses at most 50 ...
Qianyu Jin +2 more
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Coherent Communication Systems
2020In this chapter, we outline the modern coherent communication formats and how they are realized. These coherent communication formats enable long-distance and high-speed transmission. We also discuss the sources of noise in optical communication systems and the relationship between signal to noise, bit error rate, and communication format.
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Quantum communication with three coherent states
IEEE Transactions on Communications, 1995Quantum communication with a nonsymmetrical set of three states is considered. Some results obtained from numerical computation are presented. A model for quantum detection called "near optimum", similar to the binary case, is studied. Calculations of error probability in detection schemes subject to information criteria are performed and discussed ...
T.Uyematsu, C. Bendjaballah
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Coherent Optical Communication
Seventh Topical Meeting on Integrated and Guided-Wave Optics, 1984Virtually all fibre transmission systems up to the present have used simple intensity modulation of the transmit laser, most frequently in the form of binary ON/OFF modulation. At the receiver, incoming optical power has been converted directly to photocurrent in a photodetector.
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The RACE to coherent communication
Physics World, 1991Most optical communications systems use only a fraction of the enormous transmission capacity of optical fibre. Now an EC-funded consortium has built a demonstrator capable of carrying 10 digitised television signals along fibre by the technique of multi-channel coherent optical transmission.
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Coherent Optical Communications
20th European Microwave Conference, 1990, 1990A variety of coherent optical communications are reviewed in comparison with microwave communications.
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