Single-Laser 325 Tbit/s Nyquist WDM Transmission

Hillerkuss, D.; Schmogrow, R.; Meyer, Matthias; Wolf, S.; Jordan, M.; Kleinow, P.; Lindenmann, N.; Schindler, Philipp; Melikyan, Argishti; Yang, Xin; Ben-Ezra, Shalva; Nebendahl, B.; Dreschmann, M.; Meyer, J.; Parmigiani, Francesca; Petropoulos, P.; Resan, Bojan; Oehler, A.; Weingarten, K. J.; Altenhain, Lars; Ellermeyer, T.; Moeller, M.; Huebner, M.; Becker, Juergen; Koos, C.; Freude, W.; Leuthold, Juerg

doi:10.1364/jocn.4.000715

Cited by 140 publications

(94 citation statements)

References 33 publications

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“…Consequently, soliton-based communication schemes have moved out of focus over the last two decades. More recently, frequency combs were demonstrated to hold promise for revolutionizing high-speed optical communications, offering tens or even hundreds of well-defined narrowband optical carriers for massively parallel WDM [8,11,12]. Unlike carriers derived from a bank of individual laser modules, the tones of a comb are intrinsically equidistant in frequency, thereby eliminating the need for individual wavelength control and for inter-channel guard bands [8,12].…”

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confidence: 99%

“…More recently, frequency combs were demonstrated to hold promise for revolutionizing high-speed optical communications, offering tens or even hundreds of well-defined narrowband optical carriers for massively parallel WDM [8,11,12]. Unlike carriers derived from a bank of individual laser modules, the tones of a comb are intrinsically equidistant in frequency, thereby eliminating the need for individual wavelength control and for inter-channel guard bands [8,12]. In addition, when derived from the same comb source, stochastic frequency variations of optical carriers are strongly correlated, permitting efficient compensation of impairments caused by nonlinearities of the transmission fiber [13].…”

mentioning

confidence: 99%

“…In recent years, a wide variety of chip-scale comb generators have been demonstrated [14,15], enabling transmission of WDM data streams with line rates [16] of up to 12 Tbit/s. Transmission at higher line rates however, requires more carriers and lower noise levels, and still relies on spectral broadening of narrowband seed combs using dedicated optical fibers [8,11,12] or nanophotonic waveguides [17]. In addition, generating uniform combs with a broadband spectral envelope often requires delicate dispersion management schemes, usually in combination with intermediate amplifiers [11].…”

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Microresonator-based solitons for massively parallel coherent optical communications

Marin-Palomo

Kemal

Karpov

et al. 2017

Nature

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998

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Optical solitons are waveforms that preserve their shape while propagating, relying on a balance of dispersion and nonlinearity [1,2]. Soliton-based data transmission schemes were investigated in the 1980s, promising to overcome the limitations imposed by dispersion of optical fibers. These approaches, however, were eventually abandoned in favor of wavelength-division multiplexing (WDM) schemes that are easier to implement and offer improved scalability to higher data rates. Here, we show that solitons may experience a comeback in optical communications, this time not as a competitor, but as a key element of massively parallel WDM. Instead of encoding data on the soliton itself, we exploit continuously circulating dissipative Kerr solitons (DKS) in a microresonator [3,4]. DKS are generated in an integrated silicon nitride microresonator [5] by four-photon interactions mediated by Kerr nonlinearity, leading to low-noise, spectrally smooth and broadband optical frequency combs [6]. In our experiments, we use two interleaved soliton Kerr combs to trans-mit a data stream of more than 50 Tbit/s on a total of 179 individual optical carriers that span the entire telecommunication C and L bands. Equally important, we demonstrate coherent detection of a WDM data stream by using a pair of microresonator Kerr soliton combs one as a multi-wavelength light source at the transmitter, and another one as a corresponding local oscillator (LO) at the receiver. This approach exploits the scalability advantages of microresonator soliton comb sources for massively parallel optical communications both at the transmitter and receiver side. Taken together, the results prove the significant potential of these sources to replace arrays of continuous-wave lasers in high-speed communications. In combination with advanced spatial multiplexing schemes [7,8] and highly integrated silicon photonic circuits [9], DKS combs may bring chip-scale petabit/s transceivers into reach.The first observation of solitons in optical fibers [2] in 1980 was immediately followed by major research efforts to harness such waveforms for long-haul communications [1]. In these schemes, data was encoded on soliton pulses by simple amplitude modulation using on-off-keying (OOK). However, even though the viability of the approach was experimentally demonstrated by transmission over one million kilometres [10], the vision of soliton-based communications was ultimately hindered by difficulties in achieving shape-preserving propagation in real transmission systems [1] and by the fact that nonlinear interactions intrinsically prevent dense packing of soliton pulses in either the time or frequency domain. Moreover, with the advent of wavelength-division multiplexing (WDM), line rates in long-haul communication systems could be increased by rather simple parallel transmission of data streams with lower symbol rates, which are less dispersion sensitive. Consequently, soliton-based communication schemes have moved out of focus over the last two decades. More recently, frequ...

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confidence: 99%

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confidence: 99%

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Microresonator-based solitons for massively parallel coherent optical communications

Marin-Palomo

Kemal

Karpov

et al. 2017

Nature

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998

672

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“…Unlike the carriers derived from a bank of individual lasers, the tones of a comb are intrinsically equidistant in frequency and can be controlled by just two parameters  by the center frequency and by the free spectral range (FSR). This enables transmission of orthogonal frequency division multiplexing (OFDM) [6] or of Nyquist-WDM [7] signals at highest spectral efficiency. In addition, stochastic frequency variations of the various comb lines are strongly correlated, which considerably facilitates compensation of impairments caused by nonlinearities of the transmission fiber in WDM links [8].…”

Section: Introductionmentioning

confidence: 99%

“…OFC have previously been used as optical sources for WDM transmission, and a variety of experiments demonstrate Tbit/s line rates, both with integrated chip-scale devices [11][12][13][14] and with systems that rely on conventional setups of discrete components [6,7,15]. However, most of these experiments still employ a high-quality single-wavelength external-cavity laser (ECL) as a local oscillator (LO) for channel-by-channel demodulation of the coherent signals.…”

Section: Introductionmentioning

confidence: 99%

Multi-wavelength coherent transmission using an optical frequency comb as a local oscillator

et al. 2016

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Steadily increasing data rates of optical interfaces require spectrally efficient coherent transmission using higher-order modulation formats in combination with scalable wavelength-division multiplexing (WDM) schemes. At the transmitter, optical frequency combs (OFC) lend themselves to particularly precise multi-wavelength sources for WDM transmission. In this work we demonstrate that these advantages can also be leveraged at the receiver by using an OFC as a highly scalable multi-wavelength local oscillator (LO) for coherent detection. In our experiments, we use a pair of OFC that rely on gain switching of injection-locked semiconductor lasers both for WDM transmission and intradyne reception. We synchronize the center frequency and the free spectral range of the receiver comb to the transmitter, keeping the intradyne frequencies for all data channels below 15 MHz. Using 13 WDM channels, we transmit an aggregate line rate (net data rate) of 1.104 Tbit/s (1.032 Tbit/s) over a 10 km long standard single mode fiber at a spectral efficiency of 5.16 bit/s/Hz. To the best of our knowledge, this is the first demonstration of coherent WDM transmission using synchronized frequency combs as light source at the transmitter and as multiwavelength LO at the receiver.

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Spectrally Efficient Multiplexing: NYQUIST‐WDM

Bosco

2016

Enabling Technologies for High Spectral‐Efficiency Coherent Optical Communication Networks

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Single-Laser 325 Tbit/s Nyquist WDM Transmission

Cited by 140 publications

References 33 publications

Microresonator-based solitons for massively parallel coherent optical communications

Microresonator-based solitons for massively parallel coherent optical communications

Multi-wavelength coherent transmission using an optical frequency comb as a local oscillator

Spectrally Efficient Multiplexing: NYQUIST‐WDM

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