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ABSTRACT: We experimentally demonstrate 101.7-Tb/s transmission over 355 km spans of standard single-mode fiber (SSMF) at a net spectral efficiency of 11 b/s/Hz. A total of 370 dense wavelength-division multiplexed (DWDM) channels spanning the optical C- and L-bands spaced at 25 GHz were used. Each 25-GHz channel were subdivided into four subbands, with each subband carrying a 73.5-Gb/s orthogonal frequency-division multiplexed (OFDM) signal modulated with polarization-division-multiplexing (PDM) 128-ary quadrature amplitude modulation (QAM) at each modulated subcarrier. This experiment was enabled by digital signal processing (DSP) pre-equalization of transmitter impairments, all Raman amplification, heterodyne coherent detection, and DSP postequalization of the channel and receiver impairments, including pilot-based phase noise compensation.
Journal of Lightwave Technology 05/2012; 30(10):1540-1548. · 2.78 Impact Factor
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ABSTRACT: We propose a method to optimize passbands for DWDM system upgrade using tunable asymmetric interleaver, and experimentally demonstrated the passband optimization and overall performance improvement on hybrid 40G and 100G DWDM system with various modulation formats.
Optical Communication (ECOC), 2010 36th European Conference and Exhibition on; 10/2010
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Xiang Zhou,
Jianjun Yu,
Ming-Fang Huang,
Yin Shao, Ting Wang,
L. Nelson,
P. Magill,
M. Birk,
P.I. Borel,
D.W. Peckham,
R. Lingle
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ABSTRACT: Employing raised-cosine pulse-shaped PDM-36 QAM modulation and both pre- and posttransmission digital equalization, we demonstrate 12.5GHz-spaced, 640 Ã 107 Gbits/s DWDM transmission over 4 Ã 80 km of ultra-large-area fiber with a record capacity of 64 Tb/s at 8 b/s/Hz spectral efficiency.
Optical Fiber Communication (OFC), collocated National Fiber Optic Engineers Conference, 2010 Conference on (OFC/NFOEC); 04/2010
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Xiang Zhou,
Jianjun Yu,
Ming-Fang Huang,
Yin Shao, Ting Wang,
P. Magill,
M. Cvijetic,
L. Nelson,
M. Birk,
Guodong Zhang,
S. Ten,
H.B. Matthew,
S.K. Mishra
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ABSTRACT: In this paper, we propose a novel synthesizing method for high-speed 8-ary quadratic-amplitude modulation (QAM) optical signal generation using commercial optical modulators with binary electrical driving signals. Using this method, we successfully generated 114-Gb/s pulse-duration modulation (PDM)-8QAM optical signals. Intradyne detection of PDM-8QAM optical signals with robust blind polarization demultiplexing has been demonstrated by using a new cascaded multimodulus equalization algorithm. With return-to-zero-shaped PDM-8QAM modulation and the proposed blind polarization demultiplexing algorithm, we demonstrate transmission of a record 32-Tb/s fiber capacity (320 ?? 114 Gb/s) over 580 km of ultralow-loss single-mode fiber-28 fiber by utilizing C+L-band erbium-doped fiber-amplifier-only optical amplification and single-ended coherent detection technique at an information spectral efficiency of 4.0 bit/s??Hz.
Journal of Lightwave Technology 03/2010; · 2.78 Impact Factor
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Xiang Zhou,
Jianjun Yu,
Ming-Fang Huang,
Yin Shao, Ting Wang,
Peter Magill,
Milorad Cvijetic,
Lynn Nelson,
Martin Birk,
Guodong Zhang,
S Ten,
H B Matthew,
S K Mishra
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ABSTRACT: In this paper, we propose a novel synthesizing method for high-speed 8-ary quadratic-amplitude modulation (QAM) optical signal generation using commercial optical mod-ulators with binary electrical driving signals. Using this method, we successfully generated 114-Gb/s pulse-duration modulation (PDM)-8QAM optical signals. Intradyne detection of PDM-8QAM optical signals with robust blind polarization demultiplexing has been demonstrated by using a new cascaded multimodulus equalization algorithm. With return-to-zero-shaped PDM-8QAM modulation and the proposed blind polarization demultiplexing algorithm, we demonstrate transmission of a record 32-Tb/s fiber capacity (320 114 Gb/s) over 580 km of ultralow-loss single-mode fiber-28 fiber by utilizing C + L-band erbium-doped fiber-amplifier-only optical amplification and single-ended co-herent detection technique at an information spectral efficiency of 4.0 bit/s Hz.
01/2010; 28(15).
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ABSTRACT: We experimentally demonstrate 36-Gb/s source-free single-wavelength upstream OFDMA-PON transmission, enabled by ONU carrier suppression and coherent reception at the OLT. A BER < 10<sup>-3</sup> is reported over 100 km SSMF and a 1:32 optical split.
Optical Communication, 2009. ECOC '09. 35th European Conference on; 10/2009
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ABSTRACT: For the first time, we demonstrate a novel scheme to deliver 112 Gbps PolMux-RZ-QPSK baseband and 10 Gbps optical wireless signals at 60 GHz millimeter-wave in downstream links and 10 Gbps centralized lightwave upstream for the super-broadband radio-over-fiber 100 GHz spaced WDM-PON networks.
Optical Communication, 2009. ECOC '09. 35th European Conference on; 10/2009
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ABSTRACT: We experimentally demonstrate the first 100 Gb/s per-channel free-space optical transmission using polarization-multiplexed QPSK, coherent detection, and MIMO processing. This is the highest per-channel FSO rate yet reported, highly-suitable for short-distance 100 Gb/s fiber backhaul.
Optical Communication, 2009. ECOC '09. 35th European Conference on; 10/2009
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ABSTRACT: We have simplified the label swapping processing in optical labeled packet switching networks by using orthogonal frequency-division-multiplexing (OFDM) label technique. By using OFDM label, the label swapping can be realized without old label erasure. We have applied this technique in a labeled packet networking with 112-Gb/s polarization multiplexing return-to-zero quadrature phase-shift keying payload and coherent detection. Multiple label swapping processing has been demonstrated with small optical signal-to-noise ratio penalty.
IEEE Photonics Technology Letters 10/2009; · 2.19 Impact Factor
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ABSTRACT: We have generated 4 x 100-Gb/s orthogonal WDM optical signal by employing polarization-division-multiplexed (PDM) return-to-zero (RZ) QPSK modulation format and tight optical filtering technique. The required optical signal-to-noise ratio (OSNR) at bit error ratio (BER) of 2 x 10(-3) for the 400 Gb/s orthogonal DWDM signal is measured to be approximately 22.8 dB/0.1 nm. After transmission over 1040-km standard single mode fiber (EDFA-only amplification, 80-km amplifier span and fully receiver-side electrical dispersion compensation), the measured BER for all the four orthogonal subchannels are smaller than 2 x 10(-3).
Optics Express 09/2009; 17(20):17928-33. · 3.59 Impact Factor
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ABSTRACT: To meet diverse, bandwidth-intensive applications envisioned in future optical networks, as well as address the shortcomings of the current Internet, novel networking technologies will be of great importance. We discuss several key issues for the future Internet, including network virtualization mechanisms, a programmable network architecture, parallelism of optical transmission, and guaranteed quality of service provisioning. Moreover, a new type of virtualized optical substrate architecture is proposed that utilizes optical orthogonal frequency division multiple access (OFDMA), along with subwavelength switching and generic packet routing to realize the network bandwidth programmability. The main features, benefits, and design and implementation challenges of optical OFDMA networking based on sliceable routers are also described. Finally, an adaptive subcarrier allocation and assignment algorithm for future OFDMA-based networking is investigated, and a performance comparison between the proposed approach and legacy time division multiple access (TDMA)-based techniques is drawn.
Journal of Optical Communications and Networking 08/2009; · 1.87 Impact Factor
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ABSTRACT: Dual-polarization operation of all-optical IFFT/FFT elements is demonstrated for the first time employing coupler interferometry. All-optical OFDM transmission at 100-Gb/s for two QPSK-PDM sub-carriers was experimentally performed using two matched 25 G DMZIs and coherent detection.
Optical Fiber Communication - incudes post deadline papers, 2009. OFC 2009. Conference on; 04/2009
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ABSTRACT: Employing spectrally efficient PolMux-RZ-8PSK modulation format and single-ended digital coherent detection technique, we demonstrate 8 times 114-Gb/s DWDM transmission over 640 km of SSMF on a 25-GHz grid with record spectral efficiency of 4.2 bit/s/Hz, utilizing no optical dispersion compensation or Raman amplification. We show that the distortion caused by the direct square-law detection of the signal component with single-ended photo detection can be effectively mitigated by a novel DSP algorithm.
Journal of Lightwave Technology 02/2009; 27(3):146-152. · 2.78 Impact Factor
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ABSTRACT: A broadband access system with a record bandwidth of 16 Gbit/s radio OFDM signals transmission over 50 m GIPOF at 1310 nm has been designed and experimentally demonstrated for the first time.
Optical Communication, 2008. ECOC 2008. 34th European Conference on; 10/2008
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Jianjun Yu,
Xiang Zhou,
Ming-Fang Huang,
Yin Shao,
Dayou Qian, Ting Wang,
M. Cvijetic,
P. Magill,
L. Nelson,
M. Birk,
S. Ten,
H.B. Matthew,
S.K. Mishra
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ABSTRACT: Employing PolMux-RZ-8PSK modulation and coherent detection, we demonstrate 25 GHz-spaced, 161times114 Gb/s DWDM transmission through eight spans of ultra-low-loss fiber (average span length/loss of 82.75 km/14.6 dB) with a record capacity of 17 Tb/s (spectral efficiency 4.2 b/s/Hz) within the C-band EDFA bandwidth (4.025 THz).
Optical Communication, 2008. ECOC 2008. 34th European Conference on; 10/2008
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ABSTRACT: Non-linear predictor-based dynamic bandwidth allocation (NLPDBA) schemes for improving the time division multiplexed passive optical networks (TDM-PONs) upstream transmission efficiency have been investigated in an ad hoc manner. In this paper, we establish a general state space model to analyze the stability of the NLPDBA schemes from the TDM-PON system's point of view, and propose controller design guidelines to maintain the system stability under different scenarios. We prove that a TDM-PON system with NLPDBA is stable by proper pole placements as the traffic changes. Our analysis suggests a straightforward framework for designing and applying the NLPDBA scheme for TDM-PONs that ensures stability.
Communications, 2008. ICC '08. IEEE International Conference on; 06/2008
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ABSTRACT: We have proposed and experimentally demonstrated a novel scheme to generate optical millimeter-wave (mm-wave) signals by using single-sideband modulation with low-frequency local oscillator (LO) signals. In this architecture, by incorporating the proper dc bias of the modulator in central office, the optical mm-wave carriers are generated with two times frequency of the LO signal while largely reducing the bandwidth requirement of the modulator. We quantify the optical carrier-to-sideband ratio (CSR) of downstream transmission in this radio-over-fiber (ROF) link and establish that the performance of the ROF system can be significantly improved when the optical signals are transmitted at CSR equal to 0 dB.
IEEE Photonics Technology Letters 05/2008; · 2.19 Impact Factor
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ABSTRACT: We propose and experimentally demonstrate a 40-Gb/s wavelength-division-multiplexing passive optical network (WDM-PON) with a centralized directly-modulated laser (DML) source for the first time. In the central office (CO), a DML operating at 42.8- Gb/s with high driven bias and low extinction ratio (ER) is employed for carrying downstream data. In the remote node (RN) or optical network unit (ONU), a narrow-band optical filter is used to re-shape the pulse and optical spectrum for increasing the ER of DML signals and re-set phase correlation between the adjacent bits to increase the dispersion tolerance. On the other hand, the low-ER DML signals before the optical filter are re-modulated by an external intensity modulator driven by the upstream signal and then sent back to the CO. In this way, a 40-Gb/s centralized WDM-PON access system with low-cost configuration is realized.
Optical Fiber communication/National Fiber Optic Engineers Conference, 2008. OFC/NFOEC 2008. Conference on; 03/2008
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ABSTRACT: Network enabling technologies and architectures design for delivering super-broadband wireless services at >1 Gb/s over optical access networks are reviewed. Cost-efficient optical mm-wave generation and transmission technology, optical OFDM, and hierarchical architecture for high-mobility access are discussed.
Optical Fiber communication/National Fiber Optic Engineers Conference, 2008. OFC/NFOEC 2008. Conference on; 03/2008
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ABSTRACT: We have designed and experimentally demonstrated a super broadband radio-over-fiber system with a record bandwidth of 16 Gbit/s OFDM signals transmitting over both 20 km SMF-28 and wireless air distance of over 6m.
Optical Fiber communication/National Fiber Optic Engineers Conference, 2008. OFC/NFOEC 2008. Conference on; 03/2008
