Compensating fiber gratings for source flatness to reduce multiple-access interferences in optical CDMA network coder/decoders

Jen Fa Huang; Chen Mu Tsai; Yu Lung Lo

doi:10.1109/JLT.2004.824551

Compensating fiber gratings for source flatness to reduce multiple-access interferences in optical CDMA network coder/decoders

Jen Fa Huang, Chen Mu Tsai, Yu Lung Lo

Research output: Contribution to journal › Article › peer-review

21 Citations (Scopus)

Abstract

A fiber-Bragg-grating (FBG)-based optical code- division multiple-access (OCDMA) network coder/decoder (codec) is investigated for its interference suppression induced by non- flattened broad-band lightwave sources. Since each network user with different signature address code has different spectral distribution , the nonflattened light sources will cause multiple-access interference (MAI). Flatness compensation schemes are proposed to solve the MAI effects induced by nonflattened broad-band light sources. By arranging the same coding scheme but in different spectral coding band, spectral chips from FBG coder/compensator will incoherently power summed in the photodetectors to approach a more flattened power level. Signal-to-interference ratio (SIR) performances are evaluated with such compensation method for the discussed OCDMA network.

Original language	English
Pages (from-to)	739-745
Number of pages	7
Journal	Journal of Lightwave Technology
Volume	22
Issue number	3
DOIs	https://doi.org/10.1109/JLT.2004.824551
Publication status	Published - 2004 Mar

All Science Journal Classification (ASJC) codes

Atomic and Molecular Physics, and Optics

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title = "Compensating fiber gratings for source flatness to reduce multiple-access interferences in optical CDMA network coder/decoders",

abstract = "A fiber-Bragg-grating (FBG)-based optical code- division multiple-access (OCDMA) network coder/decoder (codec) is investigated for its interference suppression induced by non- flattened broad-band lightwave sources. Since each network user with different signature address code has different spectral distribution , the nonflattened light sources will cause multiple-access interference (MAI). Flatness compensation schemes are proposed to solve the MAI effects induced by nonflattened broad-band light sources. By arranging the same coding scheme but in different spectral coding band, spectral chips from FBG coder/compensator will incoherently power summed in the photodetectors to approach a more flattened power level. Signal-to-interference ratio (SIR) performances are evaluated with such compensation method for the discussed OCDMA network.",

author = "Huang, {Jen Fa} and Tsai, {Chen Mu} and Lo, {Yu Lung}",

note = "Funding Information: Manuscript received January 31, 2003; revised December 4, 2003. This work was supported by the Ministry of Education Program for Promoting Academic Excellence of Universities under Grant A-91-E-FA08-1-4 and in part by the National Science Council under Grant NSC 92-2622-6-011-001.",

year = "2004",

month = mar,

doi = "10.1109/JLT.2004.824551",

language = "English",

volume = "22",

pages = "739--745",

journal = "Journal of Lightwave Technology",

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publisher = "Institute of Electrical and Electronics Engineers Inc.",

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T1 - Compensating fiber gratings for source flatness to reduce multiple-access interferences in optical CDMA network coder/decoders

AU - Huang, Jen Fa

AU - Tsai, Chen Mu

AU - Lo, Yu Lung

N1 - Funding Information: Manuscript received January 31, 2003; revised December 4, 2003. This work was supported by the Ministry of Education Program for Promoting Academic Excellence of Universities under Grant A-91-E-FA08-1-4 and in part by the National Science Council under Grant NSC 92-2622-6-011-001.

PY - 2004/3

Y1 - 2004/3

N2 - A fiber-Bragg-grating (FBG)-based optical code- division multiple-access (OCDMA) network coder/decoder (codec) is investigated for its interference suppression induced by non- flattened broad-band lightwave sources. Since each network user with different signature address code has different spectral distribution , the nonflattened light sources will cause multiple-access interference (MAI). Flatness compensation schemes are proposed to solve the MAI effects induced by nonflattened broad-band light sources. By arranging the same coding scheme but in different spectral coding band, spectral chips from FBG coder/compensator will incoherently power summed in the photodetectors to approach a more flattened power level. Signal-to-interference ratio (SIR) performances are evaluated with such compensation method for the discussed OCDMA network.

AB - A fiber-Bragg-grating (FBG)-based optical code- division multiple-access (OCDMA) network coder/decoder (codec) is investigated for its interference suppression induced by non- flattened broad-band lightwave sources. Since each network user with different signature address code has different spectral distribution , the nonflattened light sources will cause multiple-access interference (MAI). Flatness compensation schemes are proposed to solve the MAI effects induced by nonflattened broad-band light sources. By arranging the same coding scheme but in different spectral coding band, spectral chips from FBG coder/compensator will incoherently power summed in the photodetectors to approach a more flattened power level. Signal-to-interference ratio (SIR) performances are evaluated with such compensation method for the discussed OCDMA network.

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Compensating fiber gratings for source flatness to reduce multiple-access interferences in optical CDMA network coder/decoders

Abstract

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