Monolithic GaAs Electro-Optic IQ Modulator Demonstrated at 150 Gbit/s With 64QAM

Schindler, Philipp; Korn, D.; Stamatiadis, C.; O'Keefe, M.F.; Stampoulidis, L.; Schmogrow, R.; Zakynthinos, P.; Palmer, R.; Cameron, N.; Zhou, Yixuan; Walker, Robert G.; Kehayas, E.; Ben-Ezra, Shalva; Tomkos, Ioannis; Zimmermann, Lars; Petermann, K.; Freude, W.; Koos, C.; Leuthold, Juerg

doi:10.1109/jlt.2013.2278381

Cited by 32 publications

(12 citation statements)

References 16 publications

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“…Nevertheless, through intensive research, devices generating QAM signals have recently appeared enabled both by improved modulator design and the use of digital signal processing (DSP) at both transmitter and receiver to compensate for the non-ideal phase and amplitude transfer functions. The current state of the art includes: a 40-GBaud InP modulator delivering 160 Gbit s À 1 via external polarization multiplexing of two QPSK (quadruple phase shift keying) 4 signals, an InP-based photonic integrated circuit (laser þ modulator integrated) capable of 256-Gbit s À 1 operation using 32-GBaud polarization-multiplexed 16QAM 5 ; a GaAs-based modulator at 150 Gbit s À 1 using 25-GBaud QAM signals 6 ; and finally a silicon-based modulator capable of 224 Gbit s À 1 16QAM 7 . Although the progress has been impressive, several drawbacks still remain.…”

mentioning

confidence: 99%

Modulator-free Quadrature Amplitude Modulation Signal Synthesis

Liu¹,

Kakande²,

Kelly³

et al. 2016

Optical Fiber Communication Conference

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mentioning

confidence: 99%

Modulator-free Quadrature Amplitude Modulation Signal Synthesis

Liu¹,

Kakande²,

Kelly³

et al. 2016

Optical Fiber Communication Conference

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“…Although distance-capacity product capabilities using this approach have been limited, it represents a very costeffective solution, making it a prime choice especially when transmission distance is limited, for example, within a data center or a supercomputer (hundreds of thousands within a single supercomputer) or in 'last-mile' telecommunications. [5], [6].…”

Section: Examplementioning

confidence: 99%

Performance Analysis, Characteristics, and Simulation of Digital QAM

Pagiatakis¹

2017

EJECE

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Abstract-Quadrature Amplitude Modulation or QAM is a form of modulation which is widely used for modulating data signals onto a carrier used for radio communications. QAM, when used for digital transmission for radio communications applications is able to carry higher data rates than ordinary amplitude modulated schemes and phase modulated schemes. This paper presents the various fields where QAM can be implemented, describes modulator/demodulator block diagrams for transmitters as well as receivers, provides an introduction of certain performance indicators of modulation and a list of applications using alternative implementations of QAM. Also the paper presents a simulation of QAM using

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“…M-QAM modulations combined with coherent detection becomes now a promising candidate for the implementation of next generation optical transmission systems. This is made possible thanks to technical progress in photonic integrated circuits allowing the fabrication of optical circuits for M-QAM signal generation [1]. Despite the good performance of these circuits, amplitude and phase mismatches between the M-QAM in-phase and quadrature components are still important due to the non-linear gain of the electrical amplifiers, the phase shifts in optical waveguides and the cable lengths or circuit paths on printed boards.…”

Section: Introductionmentioning

confidence: 99%

Blind I/Q Imbalance Compensation for M-QAM Optical Coherent Systems Based on Pseudo-Rotation

Nguyen-Ti¹,

Gautier²,

Scalart³

et al. 2016

2016 IEEE Global Communications Conference (GLOBECOM)

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This paper addresses the problem of Inphase/Quadrature (I/Q) imbalance sensitivity of communication systems when it occurs at both Transmitter (TX) and Receiver (RX) sides of an optical coherent system. A novel blind technique is proposed based on the pseudo-rotation of the M-QAM constellation. The pseudo-rotation based compensator is a generic approach, because it does not depend on the modulation order and the level of imbalance. To implement the proposed compensation in practical systems, two algorithms are proposed: Recursive Pseudo-Rotation (RPR) that achieves the performance of the ideal compensator and LRPR, a Low complexity version of RPR. Monte Carlo simulation results show that the proposed compensator outperforms state-of-the-art algorithms for an Additive White Gaussian Noise (AWGN) and the complexity/performance trade-off is also discussed. The efficiency of the proposed method is experimentally validated with a 10 Gbaud QPSK optical system showing its operation in the presence of Inter-Symbol Interference (ISI).

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Monolithic GaAs Electro-Optic IQ Modulator Demonstrated at 150 Gbit/s With 64QAM

Cited by 32 publications

References 16 publications

Modulator-free Quadrature Amplitude Modulation Signal Synthesis

Modulator-free Quadrature Amplitude Modulation Signal Synthesis

Performance Analysis, Characteristics, and Simulation of Digital QAM

Blind I/Q Imbalance Compensation for M-QAM Optical Coherent Systems Based on Pseudo-Rotation

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