Abstract

Real-time optical orthogonal frequency-division multiplexing (OOFDM) transceivers based on off-the-shelf components including FPGAs are experimentally demonstrated, for the first time, incorporating key functionalities such as live transceiver optimisation and advanced channel estimation, and also utilising self-developed IFFT/FFT logic algorithms verified at 10Gb/s. The fastest ever real-time end-to-end transmission of 3Gb/s DQPSK- and 16-QAM-encoded OOFDM signals over 500m multi-mode fibers is achieved with BERs of <3.3x10−9 in intensity-modulation and direct-detection systems employing directly modulated DFB lasers. Excellent performance robustness is also observed to various offset launch conditions. This work is a significant breakthrough in demonstrating the great potential of OOFDM for practical implementation in optical networks.

© 2009 OSA

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References

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2009

2008

2007

2003

1998

Chen, S.

Chi, S.

Chow, C.-W.

Cunningham, D. G.

Dudley, S. E. M.

Jin, X. Q.

Kourtessis, P.

Ma, Y.

Nowell, M. C.

Pan, C.-L.

Penty, R. V.

Qiu, K.

Quinlan, T.

Raddatz, L.

Rochart, E.

Shieh, W.

Shih, F.-Y.

Shore, K. A.

Spencer, P. S.

Tang, J. M.

Tyler, E. J.

Walker, S. D.

Wang, C.-H.

Webster, M.

White, I. H.

Yang, Q.

Yeh, C.-H.

J. Lightwave Technol.

Opt. Express

Other

N. E. Jolley, H. Kee, R. Rickard, J. Tang, and K. Cordina, “Generation and propagation of a 1550nm 10Gb/s optical orthogonal frequency division multiplexed signal over 1000m of multimode fibre using a directly modulated DFB,” Optical Fibre Communication/National Fibre Optic Engineers Conference (OFC/NFOEC) (OSA, 2005), Paper OFP3.

H. Masuda, E. Yamazaki, A. Sano, T. Yoshimatsu, T. Kobayashi, E. Yoshida, Y. Miyamoto, S. Matsuoka, Y. Takatori, M. Mizoguchi, K. Okada, K. Hagimoto, T. Yamada, and S. Kamei, “13.5-Tb/s (135×111-Gb/s/ch) no-guard-interval coherent OFDM transmission over 6248km using SNR maximized second-order DRA in the extended L-band,” Optical Fibre Communication/National Fibre Optic Engineers Conference (OFC/NFOEC) (OSA, 2009), Paper PDPB5.

B. J. C. Schmidt, Z. Zan, L. B. Du, and A. J. Lowery, “100 Gbit/s transmission using single-band direct-detection optical OFDM,” Optical Fibre Communication/National Fibre Optic Engineers Conference (OFC/NFOEC) (OSA, 2009), Paper PDPC3.

T. Duong, N. Genay, P. Chanclou, B. Charbonnier, A. Pizzinat, and R. Brenot, “Experimental demonstration of 10 Gbit/s for upstream transmission by remote modulation of 1 GHz RSOA using Adaptively Modulated Optical OFDM for WDM-PON single fiber architecture,” European Conference on Optical Communication (ECOC) (Brussels, Belgium, 2008), PD paper Th.3.F.1.

D. Qian, N. Cvijetic, J. Hu, and T. Wang, “108 Gb/s OFDMA-PON with polarization multiplexing and direct-detection,” Optical Fibre Communication/National Fibre Optic Engineers Conference (OFC/NFOEC) (OSA, 2009), Paper PDPD5.

H. Yang, S. C. J. Lee, E. Tangdiongga, F. Breyer, S. Randel, and A. M. J. Koonen, “40-Gb/s transmission over 100m graded-index plastic optical fibre based on discrete multitone modulation,” Optical Fibre Communication/National Fibre Optic Engineers Conference (OFC/NFOEC) (OSA, 2009), Paper PDPD8.

L. Hanzo, S. X. Ng, T. Keller, and W. Webb, Quadrature Amplitude Modulation: from basics to adaptive trellis-coded, turbo-equalised and space-time coded OFDM, CDMA and MC-CDMA systems (John Wiley & Sons, England, 2004).

R. P. Giddings, X. Q. Jin, H. H. Kee, X. L. Yang, and J. M. Tang, “First experimental demonstration of real-time optical OFDM transceivers”, European Conference on Optical Communication (ECOC) (Vienna, Austria, 2009) (accepted for presentation).

R. P. Giddings, X. Q. Jin, H. H. Kee, X. L. Yang, and J. M. Tang, "Experimental implementation of real-time optical OFDM modems for optical access networks," European Workshop on Photonic Solutions for Wireless, Access, and In-house Networks, May 2009, Duisburg, Germany.

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Figures (9)

Fig. 1
Fig. 1

(a) Experimental system for evaluating IFFT/FFT logic functions; (b) constellation of 16-QAM-encoded first subcarrier after FFT.

Fig. 2
Fig. 2

Real-time OOFDM transceiver architecture.

Fig. 3
Fig. 3

Experimental system setup.

Fig. 6
Fig. 6

Constellations of various DQPSK-encoded subcarriers for 3Gb/s signals after transmitting through the 500m MMF.

Fig. 9
Fig. 9

Constellations of 16-QAM-encoded subcarriers for 3Gb/s OOFDM signals after transmitting through a 500m MMF.

Fig. 4
Fig. 4

Launch offset

Fig. 5
Fig. 5

BER performance of 3Gb/s DQPSK-encoded OOFDM signal transmission over a 500m MMF.

Fig. 7
Fig. 7

BER and optical launch power versus launch offset for 3Gb/s over 500m MMF transmission of DQPSK-encoded OOFDM signals.

Fig. 8
Fig. 8

BER performance for 16-QAM encoded 3Gb/s OOFDM signal transmission over a 500m MMF.

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S=RbN

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