Results 261 to 270 of about 4,998,210 (282)
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IEEE Journal of Quantum Electronics, 1983
Experiments on mode-hopping noise induced by optical feedback are presented for AlGaAs CSP lasers. The influence of the amount of feedback and of the output power have been investigated. It turns out that the amount of excess noise associated with mode hopping strongly depends on the occurrence of hysteresis associated with the mode-hopping transition.
J. Biesterbos +3 more
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Experiments on mode-hopping noise induced by optical feedback are presented for AlGaAs CSP lasers. The influence of the amount of feedback and of the output power have been investigated. It turns out that the amount of excess noise associated with mode hopping strongly depends on the occurrence of hysteresis associated with the mode-hopping transition.
J. Biesterbos +3 more
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Real Time Optical Processing Of Frequency Hopped Spread Spectrum Signal
SPIE Proceedings, 1988This paper is an experimental investigation of the performance of a real-time spread spectrum optical signal processor. The technique developed here is used to detect large time bandwidth product spread spectrum signals transmitted by the frequency hopping method and can yield self bit synchronization. This real-time optical system can generate the two
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National Fiber Optic Engineers Conference, 2012
A coding scheme of two-dimensional frequency-hopping/periodic code for optical centralized monitoring in high capacity TDM-PON is proposed and experimentally demonstrated. The results show it achieves large code cardinality and small correlation distance.
Xu Zhou, Xiaohan Sun
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A coding scheme of two-dimensional frequency-hopping/periodic code for optical centralized monitoring in high capacity TDM-PON is proposed and experimentally demonstrated. The results show it achieves large code cardinality and small correlation distance.
Xu Zhou, Xiaohan Sun
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2007 IEEE International Conference on Communications, 2007
In this paper, we consider time-and-frequency hopping (TFH) codes for optical code-division multiple-access (OCDMA) networks. To support the differentiated service requirements for multimedia data transmission, we propose two- dimensional TFH codes with arbitrary cross-correlation constraints.
Chung-Keun Lee, Seung-Woo Seo
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In this paper, we consider time-and-frequency hopping (TFH) codes for optical code-division multiple-access (OCDMA) networks. To support the differentiated service requirements for multimedia data transmission, we propose two- dimensional TFH codes with arbitrary cross-correlation constraints.
Chung-Keun Lee, Seung-Woo Seo
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ICC 2001. IEEE International Conference on Communications. Conference Record (Cat. No.01CH37240), 2002
We propose a new generation algorithm for frequency-hopping optical orthogonal codes (FH-OOC). The new algorithm generalizes the conventional FH-OOCs by considering the time blank patterns between two adjacent symbols. We show that it can generate more available codes than the previous algorithm which does not consider the effect of time blank patterns.
Chung-Keun Lee +2 more
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We propose a new generation algorithm for frequency-hopping optical orthogonal codes (FH-OOC). The new algorithm generalizes the conventional FH-OOCs by considering the time blank patterns between two adjacent symbols. We show that it can generate more available codes than the previous algorithm which does not consider the effect of time blank patterns.
Chung-Keun Lee +2 more
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Carrier frequency hopping for optical in dispersion-managed fiber pulse transmission systems
Optics Communications, 2003We present a fiber transmission system combining dispersion management with periodical hopping of channel frequencies by means of wavelength converters. We show that the signal distortion arising from chirp reversal may be substantially suppressed for optimized dispersion-managed links.
Tonello, A +3 more
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A fast frequency-hopping time-spreading incoherent optical CDMA system
2004Describes a fast frequency-hopping time-spreading incoherent optical CDMA system.
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Novel Frequency-Hop Optical Code Division Multiple Access Based on Quadratic Congruence-Hop Codes
Chinese Journal of Lasers, 2008丁美玲 Ding Meiling +1 more
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Optical Frequency Hopped Spread Spectrum: Thoughts and Experiments
2025 IEEE Aerospace ConferenceEugene Grayver, Matthew Kelley
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