Laser Frequency Combs for Coherent Optical Communications

Torres-Company, Víctor; Schröder, Jochen; Fülöp, Attila; Mazur, Mikael; Lundberg, Lars; Helgason, Óskar B.; Karlsson, Magnus; Andrekson, P.A.

doi:10.1109/jlt.2019.2894170

Cited by 121 publications

(52 citation statements)

References 58 publications

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“…The unmodulated tones served as pilots that were recovered via OIL at the receiver side. The recovered CW signal then seeded an electro-optic comb generator [107]. In these type of transceivers, the phase-locked nature of the optical carriers are exploited in the DSP for the DWDM signals, showing reduced DSP complexity [5].…”

Section: B Optical Local Oscillator Recoverymentioning

confidence: 99%

Optical Injection Locking: From Principle to Applications

Liu

Slavı́k

2020

J. Lightwave Technol.

142

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This paper reviews optical injection locking (OIL) of semiconductor lasers and its application in optical communications and signal processing. Despite complex OIL dynamics, we attempt to explain the operational principle and main features of the OIL in an intuitive way, aiming at a wide understanding of the OIL and its associated techniques in the optic and photonic communities. We review and compare different control techniques that enable robust OIL in practical systems. The applications are reviewed with a focus on new developments in the past decade, under the categories of 'High Speed Directly Modulated Lasers' and 'Optical Carrier Recovery'. Finally, we draw our vision for future research directions.

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Section: B Optical Local Oscillator Recoverymentioning

confidence: 99%

Optical Injection Locking: From Principle to Applications

Liu

Slavı́k

2020

J. Lightwave Technol.

142

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“…In contrast, telecommunications require a few THz of bandwidth, lines with low linewidth and high conversion efficiency (i.e. the fraction of pump power converted to other comb lines) in order to reach sufficiently high power per line and optical signal to noise ratio (OSNR) [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Superchannel engineering of microcombs for optical communications

et al. 2019

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Microresonator frequency combs (microcombs) are a promising technology for generating frequency carriers for wavelength division multiplexing (WDM) systems. Multi-terabit per second WDM coherent transmitters have recently been demonstrated using both dissipative Kerr solitons and mode-locked dark pulses in optical microresonators. These experiments have focused on microcombs designed to cover a large portion of the erbium-doped fiber window. However, the question of optimum bandwidth for mi-crocombs in WDM systems has not been addressed. Here, we show that segmenting the bandwidth into smaller microcomb-driven superchannels results in an improvement of power per line. Through numerical simulations we establish a quantitative comparison between dark-pulse and soliton microcombs in WDM systems, including aspects such as conversion efficiency, tolerance to intrinsic cavity loss and group velocity dispersion engineering. We show that the improvement of minimum line power scales linearly with the number of superchannels for both types of microcombs. This work provides useful guidelines for the design of multi-terabit per second microcomb-based superchannel systems.

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“…This procedure is used to remove signals within the fiber with high transmit intensity as the data modulated signals and received output gets affected by the non-linearity associated with high intensity signals. Similar to other techniques, the inverse dispersion property is used to cancel the dispersion effects as it makes use of the high order mode (HOM) [12], which provides a negative dispersion value and a slope over the C band of −270 ps/nm/km at transmission wavelength of 1550 nm and −5.6 ps/nm/km, respectively [13]. HOM has a wide band operation range and is used for dense wavelength division multiplexing (DWDM) systems where multiple wavelengths (covering a large span) are combined with channel spacing of several GHz [14].…”

Section: High Order Mode Fibersmentioning

confidence: 99%

Adaptive Equalization for Dispersion Mitigation in Multi-Channel Optical Communication Networks

et al. 2019

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Optical communication networks (OCNs) provide promising and cost-effective support for the ultra-fast broadband solutions, thus enabling them to address the ever growing demands of telecommunication industry such as high capacity and end users’ data rate. OCNs are used in both wired and wireless access networks as they offer many advantages over conventional copper wire transmission such as low power consumption, low cost, ultra-high bandwidth, and high transmission rates. Channel effects caused by light propagation through the fiber limits the performance, hence the data rate of the overall transmission. To achieve the maximum performance gain in terms of transmission rate through the OCN, an optical downlink system is investigated in this paper using feed forward equalizer (FFE) along with decision feedback equalizer (DFE). The simulation results show that the proposed technique plays a key role in dispersion mitigation in multi-channel optical transmission to uphold multi-Gb/s transmission. Moreover, bit error rate (BER) and quality factor (Q-factor) below 10 − 5 and above 5, respectively, are achieved with electrical domain equalizers for the OCN in the presence of multiple distortion effects showing the effectiveness of the proposed adaptive equalization techniques.

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Laser Frequency Combs for Coherent Optical Communications

Abstract: Frequency combs can replace multiple lasers in WDM systems. We highlight performance requirements for frequency combs in coherent communications and present recent results using Kerr combs for multi-Tb/s transmission using advanced modulation formats.

Cited by 121 publications

References 58 publications

Optical Injection Locking: From Principle to Applications

Optical Injection Locking: From Principle to Applications

Superchannel engineering of microcombs for optical communications

Adaptive Equalization for Dispersion Mitigation in Multi-Channel Optical Communication Networks

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