Optical coherence multiplexing for interprocessor communications

Chu, Kwong W.

doi:10.1117/12.55803

Cited by 42 publications

(3 citation statements)

References 10 publications

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“…Square-law detection means that noise scales with the square of the number of users/sensors, and it cannot be eliminated. Healey was the first to analyze this in the communications context in 1987 [33] and then Chu and Dickey published a more comprehensive analysis based on continuous-wave light [34]. The Stanford group had studied the origins of the same noise, optical beat noise, in great detail in relation to multiplexing interferometric sensors [22,35].…”

Section: Digital Correlators and Communications At Kentmentioning

confidence: 99%

Staying coherent after kent: From optical communications to biomedical optics

Sampson

2011

Photonic Sens

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In this paper, an overview of author's research is presented, commencing at the University of Kent under Prof. David A. Jackson. Early research in short optical pulses and fiber-optic delay-line digital correlators led to optical communications research in code-division multiple access networking. This research was based on broadband incoherent light, and this theme continued with research into spectrum-sliced wavelength-division multiplexing. In shifting from photonics research to biomedical optics and biophotonics in the late 1990s, the emphasis on exploiting broadband light continued with research in optical coherence tomography, amongst other topics. In addition to the research outcomes, how these outcomes were attained is described, including mention of the exceptional contributions of many of my colleagues.

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Section: Digital Correlators and Communications At Kentmentioning

confidence: 99%

Staying coherent after kent: From optical communications to biomedical optics

Sampson

2011

Photonic Sens

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“…As discussed in [13], let us assume that the number of users is large enough to allow the PIIN to dominate over noise originating from individual sources. Inspired by this assumption, we can proceed to find an expression for the noise variance, assuming that the output signals of the upper and lower branches act as if they were originated from a single source with a PSD that equals the sum of PSDs of each user [13,22]. This will become clear when calculating τ c below.…”

Section: ) Multiple-access Interference Cancellation Processmentioning

confidence: 99%

Assessment of an Optical Burst Switched Core Node With a Restricted Number of Simultaneous Active Users Using the Burst Error Loss Rate

El-Rahman¹,

Rabia

Shalaby

2014

J. Opt. Commun. Netw.

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The technical superiority of spectralamplitude coding optical code-division multiple-access (SAC-OCDMA) systems over traditional wavelength division multiplexing (WDM) systems in optical burst switched (OBS) networks is mainly attributed to the former's better medium access control (MAC) layer performance. Nevertheless, in order to conduct an accurate comparison, a thorough study of the physical layer performance should be involved, especially because in many cases the physical layer noise would affect the maximum achievable number of simultaneously active users. Hence, in this work, we develop a novel assessment approach that combines both MAC and physical layer capabilities by introducing a new burst error loss rate parameter. In particular, the approach targets cases with limitations on the number of simultaneous active users. Next, as an example of a noisy physical layer, the effect of phase-induced intensity noise on the number of active users in OBS/SAC-OCDMA systems is analyzed. Our analysis shows that this effect introduces a burst error rate (BurstER) in the multiple-access interference cancellation operation (not investigated before). This BurstER is an increasing function of the number of active users and hence would suppress the system MAC layer performance. Finally, assuming an ideal WDM physical layer, we employ the developed approach to present an illustrative performance comparison between OBS/SAC-OCDMA and OBS/WDM systems. The results show that OBS/SAC-OCDMA performance outperforms that of OBS/WDM when the number of tolerated bits in error per burst exceeds a certain value.Index Terms-Optical burst switched (OBS) networks; Phase-induced intensity noise (PIIN); Queuing theory; Spectral-amplitude coding optical code-division multipleaccess (SAC-OCDMA); Wavelength division multiplexing (WDM).

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“…The output signal of the receiver is assumed to be mainly corrupted by three types of noise [6], [7], [11], [14], [15].…”

Section: E Noise Analysismentioning

confidence: 99%

Coherence Multiplex System Topologies

Meijerink

Taniman

Heideman

et al. 2007

IEEE J. Select. Topics Quantum Electron.

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Coherence multiplexing is a potentially inexpensive form of optical code-division multiple access, which is particularly suitable for short-range applications with moderate bandwidth requirements, such as access networks, LANs, or interconnects. Various topologies are known for constructing an optical transmission system in which several channels are coherence-multiplexed in one optical fiber. In this paper, the parallel array, the intrinsic reference ladder (IRL), and the discontinuous series system topologies will be further considered and compared with respect to code orthogonality requirements, theoretical performance, and some practical implementation aspects. A modification to the IRL system is proposed, resulting in a significant improvement in the theoretical performance.Index Terms-Coherence multiplexing (CM), noise analysis, optical code-division multiple access (OCDMA), optical communication, optical network topologies.

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Optical coherence multiplexing for interprocessor communications

Cited by 42 publications

References 10 publications

Staying coherent after kent: From optical communications to biomedical optics

Staying coherent after kent: From optical communications to biomedical optics

Assessment of an Optical Burst Switched Core Node With a Restricted Number of Simultaneous Active Users Using the Burst Error Loss Rate

Coherence Multiplex System Topologies

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