Abstract

Record high 19.125Gb/s real-time end-to-end dual-band optical OFDM (OOFDM) transmission is experimentally demonstrated, for the first time, in a simple electro-absorption modulated laser (EML)-based 25km standard SMF system using intensity modulation and direct detection (IMDD). Adaptively modulated baseband (0-2GHz) and passband (6.125 ± 2GHz) OFDM RF sub-bands, supporting line rates of 10Gb/s and 9.125Gb/s respectively, are independently generated and detected with FPGA-based DSP clocked at only 100MHz and DACs/ADCs operating at sampling speeds as low as 4GS/s. The two OFDM sub-bands are electrically frequency-division-multiplexed (FDM) for intensity modulation of a single optical carrier by an EML. To maximize and balance the signal transmission performance of each sub-band, on-line adaptive features and on-line performance monitoring is fully exploited to optimize key OOFDM transceiver and system parameters, which includes subcarrier characteristics within each individual OFDM sub-band, total and relative sub-band power as well as EML operating conditions. The achieved 19.125Gb/s over 25km SMF OOFDM transmission system has an optical power budget of 13.5dB, and shows almost identical bit error rate (BER) performances for both the baseband and passband signals. In addition, experimental investigations also indicate that the maximum achievable transmission capacity of the present system is mainly determined by the EML frequency chirp-enhanced chromatic dispersion effect, and the passband BER performance is not affected by the two sub-band-induced intermixing effect, which, however, gives a 1.2dB optical power penalty to the baseband signal transmission.

© 2012 OSA

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References

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  1. ITU-T Recommendation G.987.1 “10-Gigabit-capable passive optical networks (XG-PON): General requirements,” 2010.
  2. IEEE Standard 802.3av, “Carrier Sense Multiple Access with Collision Detection (CSMA/CD) Access Method and Physical Layer Specifications Amendment 1: Physical Layer Specifications and Management Parameters for 10 Gb/s Passive Optical Networks,” 2009.
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  4. 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.
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    [CrossRef]
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    [CrossRef]
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2012 (2)

2011 (2)

X. Jin, J. L. Wei, R. P. Giddings, T. Quinlan, S. Walker, and J. M. Tang, “Experimental Demonstrations and Extensive Comparisons of End-to-End Real-Time Optical OFDM Transceivers With Adaptive Bit and/or Power Loading,” IEEE Photonics Journal3(3), 500–511 (2011).
[CrossRef]

J. L. Wei, C. Sánchez, E. Hugues-Salas, P. S. Spencer, and J. M. Tang, “Wavelength-Offset Filtering in Optical OFDM IMDD Systems Using Directly Modulated DFB Lasers,” J. Lightwave Technol.29(18), 2861–2870 (2011).
[CrossRef]

2010 (1)

2008 (1)

2007 (1)

1990 (1)

C. Desem, “Optical interference in subcarrier multiplexed systems with multiple optical carriers,” IEEE J. Sel. Areas Comm.8(7), 1290–1295 (1990).
[CrossRef]

Cvijetic, N.

Desem, C.

C. Desem, “Optical interference in subcarrier multiplexed systems with multiple optical carriers,” IEEE J. Sel. Areas Comm.8(7), 1290–1295 (1990).
[CrossRef]

Giacoumidis, E.

Giddings, R. P.

X. Jin, J. L. Wei, R. P. Giddings, T. Quinlan, S. Walker, and J. M. Tang, “Experimental Demonstrations and Extensive Comparisons of End-to-End Real-Time Optical OFDM Transceivers With Adaptive Bit and/or Power Loading,” IEEE Photonics Journal3(3), 500–511 (2011).
[CrossRef]

R. P. Giddings, X. Q. Jin, E. Hugues-Salas, E. Giacoumidis, J. L. Wei, and J. M. Tang, “Experimental demonstration of a record high 11.25Gb/s real-time optical OFDM transceiver supporting 25km SMF end-to-end transmission in simple IMDD systems,” Opt. Express18(6), 5541–5555 (2010).
[CrossRef] [PubMed]

Hugues-Salas, E.

Jin, X.

X. Jin, J. L. Wei, R. P. Giddings, T. Quinlan, S. Walker, and J. M. Tang, “Experimental Demonstrations and Extensive Comparisons of End-to-End Real-Time Optical OFDM Transceivers With Adaptive Bit and/or Power Loading,” IEEE Photonics Journal3(3), 500–511 (2011).
[CrossRef]

Jin, X. Q.

Quinlan, T.

X. Jin, J. L. Wei, R. P. Giddings, T. Quinlan, S. Walker, and J. M. Tang, “Experimental Demonstrations and Extensive Comparisons of End-to-End Real-Time Optical OFDM Transceivers With Adaptive Bit and/or Power Loading,” IEEE Photonics Journal3(3), 500–511 (2011).
[CrossRef]

Sánchez, C.

Shore, K. A.

Spencer, P. S.

Tang, J. M.

Walker, S.

X. Jin, J. L. Wei, R. P. Giddings, T. Quinlan, S. Walker, and J. M. Tang, “Experimental Demonstrations and Extensive Comparisons of End-to-End Real-Time Optical OFDM Transceivers With Adaptive Bit and/or Power Loading,” IEEE Photonics Journal3(3), 500–511 (2011).
[CrossRef]

Wei, J. L.

Wong, E.

Zheng, X.

IEEE J. Sel. Areas Comm. (1)

C. Desem, “Optical interference in subcarrier multiplexed systems with multiple optical carriers,” IEEE J. Sel. Areas Comm.8(7), 1290–1295 (1990).
[CrossRef]

IEEE Photonics Journal (1)

X. Jin, J. L. Wei, R. P. Giddings, T. Quinlan, S. Walker, and J. M. Tang, “Experimental Demonstrations and Extensive Comparisons of End-to-End Real-Time Optical OFDM Transceivers With Adaptive Bit and/or Power Loading,” IEEE Photonics Journal3(3), 500–511 (2011).
[CrossRef]

J. Lightwave Technol. (4)

Opt. Express (2)

Other (10)

R. P. Giddings, E. Hugues-Salas, J. M. Tang, and S. Ben-Ezra, “First Experimental Demonstration of 17.5Gb/s Dual-Band Real-time Optical OFDM transmission in a 25km SSMF IMDD link using 4GS/s DAC/ADCs,” European Conference on Optical Communication (ECOC), (Amsterdam, 2012), paper Th.2.A.5.

T. Tanaka, M. Nishihara, T. Takahara, L. Li, Z. Tao, and J. C. Rasmussen, “50 Gbps Class Transmission in Single Mode Fiber using Discrete Multi-tone Modulation with 10G Directly Modulated Laser,” Optical Fibre Communication Conf./National Fiber Optic Engineers Conf.(OFC/NFOEC), (OSA, 2012), Paper OTh4G.3.

E. Hugues-Salas, R. P. Giddings, X. Q. Jin, T. Quinlan, Y. Hong, S. Walker, and J. M. Tang, “REAM Intensity Modulator–Enabled Colorless Transmission of Real-Time Optical OFDM Signals for WDM-PONs,” European Conference on Optical Communication (ECOC), (Amsterdam, 2012), paper P6.15.

ITU-T Recommendation G.975.1, “Forward error correction for high bit rate DWDM submarine systems,” 2004.

ITU-T Recommendation G.987.1 “10-Gigabit-capable passive optical networks (XG-PON): General requirements,” 2010.

IEEE Standard 802.3av, “Carrier Sense Multiple Access with Collision Detection (CSMA/CD) Access Method and Physical Layer Specifications Amendment 1: Physical Layer Specifications and Management Parameters for 10 Gb/s Passive Optical Networks,” 2009.

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.

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.

D. Qian, J. Hu, J. Yu, P. N. Ji, L. Xu, T. Wang, M. Cvijetic, and T. Kusano, “Experimental demonstration of a novel OFDM-A based 10 Gb/s PON architecture,” European Conference on Optical Communication (ECOC), (Berlin, 2007), Paper Mo 5.4.2.

W. L. Briggs and V. E. Henson, The DFT An Owner’s Manual for the Discrete Fourier Transform (Society for Industrial and Applied Mathematics, 1987).

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Figures (8)

Fig. 1
Fig. 1

Experimental system setup for the 19.125Gb/s real-time dual-band OOFDM system.

Fig. 2
Fig. 2

Adaptive bit and power loading profiles a) Subcarrier bit loading allocation per OFDM sub-band, b) Relative subcarrier power loading and relative received subcarrier power levels per OFDM sub-band.

Fig. 3
Fig. 3

Measured system frequency responses normalised to the first subcarrier power for analogue back-to-back (including and excluding the RF section), optical back-to-back and 25km SSMF. Also shown are the effects on the system frequency response due to the EML + PIN only and due to the SSMF only. a) Baseband system frequency responses, b) Passband system frequency responses.

Fig. 4
Fig. 4

Spectra of dual-band OOFDM RF signals. (a) Transmit signal at output of RF coupler, total RF power −4.25dBm [50Ω]. Received signal at output of PIN after (b) transmission over 25km SSMF, ROP −3.8dBm, total RF power −12.6dBm [50Ω], (c) optical back-to-back transmission, ROP −5.7dBm, total RF power −15.2dBm [50Ω].

Fig. 5
Fig. 5

Baseband and passband BER performance as a function of received optical power for 19.125Gb/s optical back-to-back and 25km SSMF. Passband BER performance over 25km MetroCorTM is also shown.

Fig. 6
Fig. 6

BER distribution across all subcarriers for baseband and passband OFDM signals after transmission through 25km SSMF.

Fig. 7
Fig. 7

Example received subcarrier constellations before channel equalisation for the baseband OOFDM sub-band.

Fig. 8
Fig. 8

Example received subcarrier constellations before channel equalisation for the passband OOFDM sub-band.

Tables (2)

Tables Icon

Table 1 Transceiver and System Parameters

Tables Icon

Table 2 Dual-band OFDM RF Signal Levels

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