Flexible terabit/s Nyquist-WDM super-channels using a gain-switched comb source

Pfeifle, J.; Vujicic, Vidak; Watts, Regan; Schindler, Philipp; Weimann, C.; Zhou, Rui; Freude, W.; Barry, Liam P.; Koos, C.

doi:10.1364/oe.23.000724

Cited by 72 publications

(39 citation statements)

References 38 publications

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“…Phase randomization is an important ingredient for security in quantum communications as it effectively maps the coherent state of attenuated pulses onto photon number states. This feature prevents gain-switched laser to be used in coherent optical communication systems, unless combined with injection locking to stabilized the phase of the pulses 23 .…”

Section: Resultsmentioning

confidence: 99%

A modulator-free quantum key distribution transmitter chip

et al. 2019

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Quantum key distribution (QKD) has convincingly been proven compatible with real life applications. Its wide-scale deployment in optical networks will benefit from an optical platform that allows miniature devices capable of encoding the necessarily complex signals at high rates and with low power consumption. While photonic integration is the ideal route toward miniaturisation, an efficient route to high-speed encoding of the quantum phase states on chip is still missing. Consequently, current devices rely on bulky and high power demanding phase modulation elements which hinder the sought-after scalability and energy efficiency. Here we exploit a novel approach to high-speed phase encoding and demonstrate a compact, scalable and power efficient integrated quantum transmitter. We encode cryptographic keys on-demand in high repetition rate pulse streams using injection-locking with deterministic phase control at the seed laser. We demonstrate record secure-key-rates under multiprotocol operation. Our modulator-free transmitters enable the development of high-bit rate quantum communications devices, which will be essential for the practical integration of quantum key distribution in high connectivity networks.

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Section: Resultsmentioning

confidence: 99%

A modulator-free quantum key distribution transmitter chip

et al. 2019

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“…Chip-scale comb sources have been used in a variety of WDM transmission experiments, relying on different comb generation approaches and covering a wide range of data rates, channel counts, and line spacings [5][6][7][8][9][10][14][15][16][17][18][19]. A particularly promising option to generate frequency combs in chip-scale devices relies on Kerr comb generation in micro-ring resonators [27].…”

Section: Soliton Kerr Combs For Massively Parallel Wdm Communicationsmentioning

confidence: 99%

Performance of chip-scale optical frequency comb generators in coherent WDM communications

et al. 2020

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Optical frequency combs have the potential to become key building blocks of optical communication subsystems. The strictly equidistant, narrow-band spectral lines of a frequency comb can serve both as carriers for massively parallel data transmission and as local oscillator for coherent reception. Recent experiments have demonstrated the viability of various chip-based comb generator concepts for communication applications, offering transmission capacities of tens of Tbit/s. Here, we investigate the influence of the comb line power and of the carrier-to-noise power ratio on the performance of a frequency comb in a WDM system. We distinguish two regimes of operation depending on whether the comb source or the transmission link limits the performance of the system, i.e., defines the link reach, restricts the choice of modulation format and sets the maximum symbol rate. Finally, we investigate the achievable OSNR and channel capacity when using the tones of a soliton Kerr frequency comb as multi-wavelength carriers for WDM systems.

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“…This pilot tone aided direct detection scheme eliminates the need for a low linewidth optical local oscillator, optical 90 o hybrid and optical phase locking. The first Tb system using a 9 line EI GSL comb and 16QAM signalling was reported by J. Pfeifle, et al [225]. Six super-channel architectures that are based on 3 FSR (20, 18.5 and 12.5 GHz) and 2 modulation formats (QPSK and 16QAM.)…”

Section: C-bandmentioning

confidence: 99%

“…Transceiver and Network flexibility [66], [108], [53], [125], [39], [156], [203] 3 Comb enabled Terabit transmission [71], [72], [144], [170], [181], [195], [196], [225], [253] 4 Field trials [120], [121] VI. OFC DE-MULTIPLEXING/ FILTERING TECHNIQUES…”

Section: C-bandmentioning

confidence: 99%

A Survey of Optical Carrier Generation Techniques for Terabit Capacity Elastic Optical Networks

Imran

Anandarajah

Kaszubowska-Anandarajah

et al. 2018

IEEE Commun. Surv. Tutorials

107

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Abstract-Elastic optical networks (EON) have been proposed to meet the network capacity and dynamicity challenges. Hardware and software resource optimization and re-configurability are key enablers for EONs. Recently, innovative multi-carrier transmission techniques have been extensively investigated to realize high capacity (Tb/s) flexible transceivers. In addition to standard telecommunication lasers, optical carrier generators based on optical frequency combs (OFC) have also been considered with expectations of reduced cost and inventory, improved spectral efficiency and flexibility. A wide range of OFC generation techniques have been proposed in the literature over the past few years. It is imperative to summarize the state of the art, compare and assess these diverse techniques from a practical perspective. In this survey, we identify salient features of optical multicarrier generators, review and compare these techniques both from a physical and network layer perspective. OFC demultiplexing/filtering techniques have also been reviewed. In addition to transmission performance, the impact of such sources on the network performance and real-world deployment strategies with reference to cost, power consumption, and level of flexibility have also been discussed. Field trials, integrated solutions, flexibility demonstrations are also reported. Finally, open issues and possible future directions that can lead to real network deployment are highlighted.

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Flexible terabit/s Nyquist-WDM super-channels using a gain-switched comb source

Cited by 72 publications

References 38 publications

A modulator-free quantum key distribution transmitter chip

A modulator-free quantum key distribution transmitter chip

Performance of chip-scale optical frequency comb generators in coherent WDM communications

A Survey of Optical Carrier Generation Techniques for Terabit Capacity Elastic Optical Networks

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