Optical spectral amplitude CDMA communication

Nguyen, Lim; Dennis, Tasshi; Aazhang, Behnaam; Young, James F.

doi:10.1109/50.622889

Cited by 55 publications

(3 citation statements)

References 26 publications

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“…We notice that most of the reported experiments [26][27][28][29][30] employ spread spectrum technology and DSF, while the reports of high speed unipolar OCDMA experiments [1,31] are relatively less. Ultrashort optical pulse and dispersion effect may be the obstacle to fulfill the unipolar OCDMA system.…”

Section: Optical Hard Limitermentioning

confidence: 97%

The Impact of Dispersion and Nonlinearity on the Performance of Unipolar Optical Code Division Multiple Access System

Ma¹,

Zuo²,

Lin³

2001

Journal of Optical Communications

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The performance of a unipolar optical code division multiple access (OCDMA) system basing on optical orthogonal code (OOC) has been analyzed. Compared with the ideal fiber case, numerical results show that the system performance decreases dramatically considering the dispersion and nonlinearity in the normal single-mode fiber. We also give some proposals to withhold the deterioration of the system performance caused by the dispersion and nonlinearity.

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Section: Optical Hard Limitermentioning

confidence: 97%

The Impact of Dispersion and Nonlinearity on the Performance of Unipolar Optical Code Division Multiple Access System

Ma¹,

Zuo²,

Lin³

2001

Journal of Optical Communications

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“…We used LC-SLM to encode the power spectrum of a source into bipolar Walsh codes for data modulation. The coding principle is the same as that described by Young et al 27) in which a bipolar code was represented as two unipolar codes, as shown in Fig. 2.…”

Section: Operational Principlesmentioning

confidence: 99%

Constructing a two bands optical code-division multiple-access network of bipolar optical access codecs using Walsh-coded liquid crystal modulators

Yen¹,

Huang²,

Chih³

2014

Jpn. J. Appl. Phys.

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We propose and experimentally demonstrated the two bands optical code-division multiple-access (OCDMA) network over bipolar Walsh-coded liquid-crystal modulators (LCMs) and driven by green light and red light lasers. Achieving system performance depends on the construction of a decoder that implements a true bipolar correlation using only unipolar signals and intensity detection for each band. We took advantage of the phase delay characteristics of LCMs to construct a prototype optical coder/decoder (codec). Matched and unmatched Walsh signature codes were evaluated to detect correlations among multiuser data in the access network. By using LCMs, a red and green laser light source was spectrally encoded and the summed light dots were complementary decoded. Favorable contrast on auto- and cross-correlations indicates that binary information symbols can be properly recovered using a balanced photodetector.

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“…Here we limit our analysis to a synchronous system. For on-off-keyed modulation, the E field received by the ith decoder can be written as [30]…”

Section: Spects O-cdma Architectures Protocols and Performance Simumentioning

confidence: 99%

Spectral phase encoded time spread optical code division multiple access technology for next generation communication networks [Invited]

et al. 2007

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͑Doc. ID 83028͒ We overview and summarize the progress of the spectral phase encoded time spreading (SPECTS) optical code division multiple access (O-CDMA) technology. Recent progress included a demonstration of a 320 Gbit/ s ͑32-user ϫ 10 Gbit/ s͒ all-optical passive optical network testbed based on the SPECTS O-CDMA technology and a theoretical prediction of the spectral efficiency at 100% and above. In particular, InP-based integrated photonics allows implementation of SPECTS O-CDMA transmitters and receivers monolithically integrated on a chip. The integrated InP chip technology not only allows robust and compact configurations for practical and low-cost O-CDMA network deployments but also offers code reconfigurations at rapid rates for secure communication applications.

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Optical spectral amplitude CDMA communication

Cited by 55 publications

References 26 publications

The Impact of Dispersion and Nonlinearity on the Performance of Unipolar Optical Code Division Multiple Access System

The Impact of Dispersion and Nonlinearity on the Performance of Unipolar Optical Code Division Multiple Access System

Constructing a two bands optical code-division multiple-access network of bipolar optical access codecs using Walsh-coded liquid crystal modulators

Spectral phase encoded time spread optical code division multiple access technology for next generation communication networks [Invited]

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