| Line coding to enhance the performance of 10-Gb/s CPFSK-ASK directly modulated signals. | |
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MedLine Citation:
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PMID: 20588681 Owner: NLM Status: PubMed-not-MEDLINE |
Abstract/OtherAbstract:
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The major drawback of frequency modulation (FM)-based directly modulated laser (DML) is its non-uniform FM response at low frequency range which gives rise to a severe pattern-dependent performance degradation. In this paper, we investigate the use of line coding to deplete the low-frequency spectral contents of the signal and thus to alleviate the degradation. We examine various line codes (8B/10B, 5B/6B, 7B/8B, 9B/10B, and 64B/66B) with continuous-phase frequency-shift keying/ amplitude-shift keying (CPFSK/ASK) signals generated using a DML and a delay interferometer. Experimental demonstrations are performed with a long pseudorandom bit sequence length of 2(20)-1 and the bandwidth expansion by each code is taken into consideration. The results show that among the five codes we tested, 9B/10B code outperforms the other codes in terms of receiver sensitivity an dispersion tolerance. We demonstrate successful transmission of 10-Gb/s CPFSK-ASK signals over 65-km standard single-mode fiber with a bandwidth expansion of only 11.1%. |
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Authors:
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Zaineb Al-Qazwini; Hoon Kim |
Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Optics express Volume: 18 ISSN: 1094-4087 ISO Abbreviation: Opt Express Publication Date: 2010 Apr |
Date Detail:
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Created Date: 2010-06-30 Completed Date: 2010-09-29 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101137103 Medline TA: Opt Express Country: United States |
Other Details:
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Languages: eng Pagination: 8360-6 Citation Subset: - |
Affiliation:
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Department of Electrical &Computer Engineering, National University of Singapore, 4 Engineering Drive 3, Singapore 117576. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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