CMOS-Photonics Codesign of an Integrated DAC-Less PAM-4 Silicon Photonic Transmitter

Sepehrian, Hassan; Yekani, Amin; Rusch, Leslie A.; Shi, Wei

doi:10.1109/tcsi.2016.2613514

Cited by 28 publications

(16 citation statements)

References 26 publications

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“…The design can accommodate more OAM channels by increasing the number of 2D antennas in the emitter section. Furthermore, as the device was fabricated using the standard 220-nm SOI process, it can be readily integrated with many other photonic components such as WDM filters [22], high-speed CMOSphotonics modulators [23], coherent transmitters [25] [24], and Ge photo detectors [26] for ultra-high-capacity WDM × SDM transmission systems.…”

Section: Discussionmentioning

confidence: 99%

WDM-Compatible Polarization-Diverse OAM Generator and Multiplexer in Silicon Photonics

Chen

Lin

Villers

et al. 2020

IEEE J. Select. Topics Quantum Electron.

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Spatial multiplexing using orbital angular momentum (OAM) modes is an efficient means of scaling up the capacity of fiber-optic communications systems; integrated multiplexers are crucial enablers of this approach. OAM modes are circularly polarized when propagating in a fiber, however, OAM generators previously demonstrated in silicon photonics use locally linearly polarized emitters. Coupling from multiplexers to fibers in those solutions results in extra loss and complexity. Moreover, many of those solutions are based on resonator structures with strong wavelength dependence, and are thus incompatible with wavelength-division multiplexing (WDM). We experimentally demonstrate on-chip generation and multiplexing of OAM modes using an array of circularly polarized 2D antennas with wide wavelength coverage. The proposed device was implemented on the standard 220-nm silicon-on-insulator platform. Optical vortex beams with OAM orders ranging from -3 to +3 in both left and right circular polarization states were generated from the same aperture across a wavelength range of 1540 nm to 1557 nm. This device could serve as a multiplexer or demultiplexer for up to 12 information bearing channels coupling into an OAM fiber, and is compatible with WDM multiplexing as well.

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Section: Discussionmentioning

confidence: 99%

WDM-Compatible Polarization-Diverse OAM Generator and Multiplexer in Silicon Photonics

Chen

Lin

Villers

et al. 2020

IEEE J. Select. Topics Quantum Electron.

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“…11c and 12c). In segmented MZMs or cascaded architectures using compact MRMs (e.g., DAC-less driving configurations to be discussed in the next section), the skew will be exacerbated in the presence of delay mismatch between their driving signals [34,35]. Eye skew will become more important as we push to higher baud rates as shorter rise/fall edges demand more accurate sample timing.…”

Section: Timing Impairmentsmentioning

confidence: 99%

Silicon photonic modulators for PAM transmissions

Shi

Sepehrian

et al. 2018

J. Opt.

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High-speed optical interconnects are crucial for both high performance computing and data centers. High power consumption and limited device bandwidth have hindered the move to higher optical transmission speeds. Integrated optical transceivers in silicon photonics using pulse-amplitude modulation (PAM) are a promising solution to increase data rates. In this paper, we review recent progress in silicon photonics for PAM transmissions.

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“…Despite recent demonstrations in higher-order modulation formats, with direct detection [2][3][4][5][6] or coherent detection [7][8][9][10], there exists a gap between optimization efforts in the design of SiP modulators and in the system-level performance. A joint optimization, of both modulator design and system parameters, could further push performance.…”

Section: Introductionmentioning

confidence: 99%

Silicon Photonic IQ Modulators for 400 Gb/s and Beyond

Sepehrian

Lin

Rusch

et al. 2019

J. Lightwave Technol.

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Silicon photonics has enormous potential for ultrahigh-capacity coherent optical transceivers. We demonstrate an IQ modulator using silicon photonic traveling-wave modulators optimized for higher-order quadrature amplitude modulation (QAM). Its optical and RF characteristics are studied thoroughly in simulation and experiment. We propose a system-orientated approach to optimization of the silicon photonic IQ modulator, which minimizes modulator-induced power penalty in a QAM transmission link. We examine the trade-off between modulation efficiency and bandwidth for the optimal combination of modulator length and bias voltage to maximize the clear distance between adjacent constellation points. This optimum depends on baud rate and modulation format, as well as achievable driving voltage swing. Measured results confirm our prediction using the proposed methodology. Without pre-compensating bandwidth limitation of the modulator, net data rates up to 232 Gb/s (70 Gbaud 16-QAM) on single polarization are captured, indicating great potential for 400+ Gb/s dual-polarization transmission.

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CMOS-Photonics Codesign of an Integrated DAC-Less PAM-4 Silicon Photonic Transmitter

Cited by 28 publications

References 26 publications

WDM-Compatible Polarization-Diverse OAM Generator and Multiplexer in Silicon Photonics

WDM-Compatible Polarization-Diverse OAM Generator and Multiplexer in Silicon Photonics

Silicon photonic modulators for PAM transmissions

Silicon Photonic IQ Modulators for 400 Gb/s and Beyond

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