Abstract

Impairments of inter-symbol interference and beat noise in coherent time-spreading optical code-division-multiple-access are investigated theoretically and experimentally by sweeping the data-rate from 622Mbps up to 10Gbps with 511-chip superstructured fiber Bragg grating. The BER improvement by using optical thresholding technique has been verified in the experiment.

© 2005 Optical Society of America

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References

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    [CrossRef]
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  11. S. Kutsuzawa, N. Minato, K. Sasaki, H. Kobayashi, A. Nishiki, T. Ushikubo, K. Kamijoh, Y. Kamio, N. Wada, and F. Kubota, "Field demonstration of time-spread/wavelength-hop OCDM using FBG en/decoder," Optical Fiber Communication Conference 2005 (OFC /NFOEC 2005), (Anaheim, USA, 2005), OME77.
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    [CrossRef] [PubMed]

ECOC 2004 (1)

K. Kitayama, X. Wang, and H. Sotobayashi, "State of the art and applications of optical code division multiple access," in European Conference on Optical Communication (ECOC’04), (Stockholm, Sweden, 2004), Tu4.6.1.

IEEE Photon. Tech. Lett. (1)

S. Kutsuzawa, N. Minato, S. Oshiba, A. Nishiki, and K. Kitayama, "10 Gb/s×2 ch signal unrepeated transmission over 100 km of data rate enhanced time-spread/wavelength-hopping OCDM using 2.5-Gb/s-FBG en/decoder," IEEE Photon. Tech. Lett. 15, 317-319 (2003).
[CrossRef]

IEEE Photonics Technol. Lett. (1)

R. P. Scott, W. Cong, K. Li, V. J. Hernandez, B. H. Kolner, J. P. Heritage, and S. J. Ben Yoo, "Demonstration of an error-free 4×10 Gb/s multiuser SPECTS O-CDMA network testbed," IEEE Photonics Technol. Lett. 16, 2186-2188 (2004).
[CrossRef]

IEEE Trans. Commun. (1)

J. A. Salehi and C. A. Brackett, "Code division multiple-access techniques in optical fiber networks," IEEE Trans. Commun. 37, 824-842, (1989).
[CrossRef]

J. Lightwave Technol. (4)

OFC 2005 (1)

X. Wang, N. Wada, T. Hamanaka, A. Nishiki and K. Kitayama, "10-user asynchronous OCDMA transmission experiment with 511-chip SSFBG and SC-based optical thresholder," Optical Fiber Communication Conf. (OFC’05 postdeadline), (Anaheim, USA, 2005), PD 33.

OFC/NFOEC 2005 (1)

S. Kutsuzawa, N. Minato, K. Sasaki, H. Kobayashi, A. Nishiki, T. Ushikubo, K. Kamijoh, Y. Kamio, N. Wada, and F. Kubota, "Field demonstration of time-spread/wavelength-hop OCDM using FBG en/decoder," Optical Fiber Communication Conference 2005 (OFC /NFOEC 2005), (Anaheim, USA, 2005), OME77.

Opt. Express (1)

Opt. Lett. (1)

OptoElectronics Communication Conf. 2000 (1)

X. Wang and K. T. Chan, "Enhancement of transmission data rates in incoherent FO-CDMA systems," in OptoElectronics Communication Conference (OECC’00), (Chiba, Japan, 2000), Tech. Dig., 14A2-5.

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Figures (5)

Fig. 1.
Fig. 1.

Schematic diagrams of encoded and decoded waveforms in coherent OCDMA

Fig. 2.
Fig. 2.

Experimental setup for demonstration the data-rate flexibility and the limitation with 511-chip SSFBG

Fig. 3.
Fig. 3.

Measured waveforms of en/decoded signals with different data-rate

Fig. 4.
Fig. 4.

(a) BER performances, (b) power penalty vs. data-rate

Fig. 5.
Fig. 5.

Performance of 4 different 511-chip codes at 10 Gbps(a) Autocorrelations measured by optical sampling oscilloscope(b) BER performances without optical thresholder(c) BER performances with optical thresholder

Tables (1)

Tables Icon

Table 1. Number of interference bits for different data-rate

Metrics