32Tb/s (320×114Gb/s) PDM-RZ-8QAM transmission over 580km of SMF-28 ultra-low-loss fiber

Zhou, Xiang; Yu, Jianjun; Huang, Ming-Fang; Yin, Shimin; Wang, Ting; Magill, Peter; Cvijetic, Milorad; Nelson, L.E.; Birk, Martin; Zhang, Guodong; Ten, S.; Matthew, Hawes; Mishra, Snigdharaj

doi:10.1364/ofc.2009.pdpb4

Cited by 15 publications

(14 citation statements)

References 3 publications

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“…Optical communications based on coherent states can now reach terabit-per-second transmission rates 11,12 . However, the growing need for even higher data transmission rates for communications, cloud computing and other virtualization applications 13 has motivated extensive research into novel multilevel modulation and multiplexing communication formats 14,15 , and low-noise signal amplification 16,17 and processing 18 protocols to further improve spectral efficiency and overall information exchange fidelity.…”

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confidence: 99%

Photon number resolution enables quantum receiver for realistic coherent optical communications

2014

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Quantum-enhanced measurements can provide information about the properties of a physical system with sensitivities beyond what is fundamentally possible with conventional technologies. However, this advantage can be achieved only if quantum measurement technologies are robust against losses and real-world imperfections, and can operate in regimes compatible with existing systems. Here, we demonstrate a quantum receiver for coherent communication, the performance of which not only surpasses the standard quantum limit, but does so for input powers extending to high mean photon numbers. This receiver uses adaptive measurements and photon number resolution to achieve high sensitivity and robustness against imperfections, and ultimately shows the greatest advantage over the standard quantum limit ever achieved by any quantum receiver at power levels compatible with state-of-the-art optical communication systems. Our demonstration shows that quantum measurements can provide real and practical advantages over conventional technologies for optical communications.M easurements based on the quantum properties of physical systems have revolutionized our understanding of information and have enabled many tasks that are not possible by any classical means. Measurements taking advantage of quantum resources have given birth to quantum communication 1,2 and quantum metrology 3,4 , which are crucial for many quantum technologies, including quantum computing 5,6 , with potential capabilities far beyond the limits of their classical counterparts. Quantum measurements for the discrimination of non-orthogonal coherent states, which cannot be perfectly discriminated due to their inherent quantum noise 7 , can enable discrimination below the standard quantum limit (SQL) 8-10 and approach the ultimate limit allowed by quantum mechanics. These measurements have great potential for improving communication technologies and many quantum information applications.Coherent states are excellent carriers of quantum and classical information due to their intrinsic resilience to loss and their highspectral-efficiency capabilities. Optical communications based on coherent states can now reach terabit-per-second transmission rates 11,12 . However, the growing need for even higher data transmission rates for communications, cloud computing and other virtualization applications 13 has motivated extensive research into novel multilevel modulation and multiplexing communication formats 14,15 , and low-noise signal amplification 16,17 and processing 18 protocols to further improve spectral efficiency and overall information exchange fidelity. State-of-the-art optical coherent receivers for non-orthogonal coherent states employ direct coherent homodyne or heterodyne detection and are now approaching their ultimate sensitivity limit 19,20 , the SQL. However, quantum mechanics allows for a much lower error bound for non-orthogonal state discrimination-the Helstrom bound 7 . For example, the SQL is about 10 6 times higher than the error rate given by the He...

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confidence: 99%

Photon number resolution enables quantum receiver for realistic coherent optical communications

2014

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“…In our scheme, the 8QAM optical signal is generated by using a parallel I/Q modulator and a π/2 PM with binary drive signals. 8QAM is attractive because in theory it can tolerate 1.6 dB more noise than 8-PSK and 2 dB more noise than 16QAM [3,4]. The operational principle of the proposed 8QAM modulator is shown in Fig.…”

Section: Advanced Modulation Technologiesmentioning

confidence: 99%

“…However, progress in digital coherent detection technology can made possible the practical implementation of more sophisticated multi-level and multi-dimensional modulation formats with higher spectral efficiency. Employing PDM-RZ-octaphase phase shift keying (8PSK) [3,4] or PDM-RZ-octaphase quadrature amplitude modulation (8QAM) [5] modulation and single-ended digital coherent detection, we recently demonstrated 17 Tb/s (161 × 114 Gb/s) or 16 Tb/s transmission over 622 km of ultra-low-loss (ULL) SMF-28 fiber or 640 km SMF-28 using only C-band EDFA amplification. Utilizing both C and L bands, we demonstrated the highest fiber capacity of 320 × 114 Gb/s DWDM signal on a 25 GHz grid by using PDM-RZ-8QAM and EDFA-only optical amplification [3,4].…”

Section: Introductionmentioning

confidence: 99%

“…At the transmitter side, multilevel modulation format and polarization multiplexing are key technologies to reduce the baud rate. To extend the transmission distance, new fiber with lower loss and/or larger effective area [3][4][5][6][7][8][9][10] and advanced amplification such as distributed Raman amplifier [1, 2, 6-11, 18, 20] have been employed in the newly designed optical transmission system to improve the optical signal-tonoise ratio (OSNR). At the receiver side, digital coherent detection technology allows the use of a universal receiver front-end for different modulation formats.…”

Section: Introductionmentioning

confidence: 99%

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Ultra-High-Capacity DWDM transmission system for 100G and beyond

Zhou

2010

IEEE Commun. Mag.

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142

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“…Although DBPSK is an old technique, its combined linear and nonlinear gains have been recognized only recently. In transmission links with huge capacities, PSK based modulation can possibly provide tolerance to chromatic and polarization mode dispersion [6]- [8]. As OOK and DBPSK has poor spectral efficiency (1 bit/Symbol), differential quaternary phase shift keying (DQPSK) and differential 8-level PSK (8-DPSK) are favoured which can offer more spectral efficiency [1], [9].…”

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confidence: 99%

Performance comparison of various PSK modulation schemes for ultra-high speed long-haul fiber-optic communication system

Faisal

Rahman

2012

2012 IEEE International Conference on Advanced Networks and Telecommunciations Systems (ANTS)

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32Tb/s (320×114Gb/s) PDM-RZ-8QAM transmission over 580km of SMF-28 ultra-low-loss fiber

Abstract: Employing PDM-RZ-8QAM modulation, digital coherent detection and EDFA-only amplification, we demonstrate 25 GHz-spaced, 320×114Gb/s DWDM transmission through seven spans of ultra-low-loss fiber (average span length/loss of 82.8 km/14.6 dB) with a record capacity of 32Tb/s.

Cited by 15 publications

References 3 publications

Photon number resolution enables quantum receiver for realistic coherent optical communications

Photon number resolution enables quantum receiver for realistic coherent optical communications

Ultra-High-Capacity DWDM transmission system for 100G and beyond

Performance comparison of various PSK modulation schemes for ultra-high speed long-haul fiber-optic communication system

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