High-Speed SiGe BiCMOS Detector Enabling a 28 Gbps Quasi-Coherent Optical Receiver

Valdecasa, Guillermo Silva; Puertas, Omar Gallardo; Altabás, José A.; Squartecchia, Michele; Jensen, Jesper Bevensee; Johansen, Tom K.

doi:10.1109/tcsii.2021.3111451

Cited by 2 publications

(1 citation statement)

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“…An SiPIC coherent receiver comprising all optical components and trans-impedance amplifiers (TIAs) on the same chip for dual-polarization QPSK links has been demonstrated in [11,12]. A quasi-coherent optical receiver, designed in 130 nm SiGe BiCMOS technology with major components being PIN detectors, TIAs, envelope detectors, and limiting amplifiers for 28 Gbaud has been demonstrated in [13].…”

Section: Introductionmentioning

confidence: 99%

An Analog Signal Processing EIC-PIC Solution for Coherent Data Center Interconnects

Chugh¹,

Ashok²,

Jain³

et al. 2022

Preprint

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Data center interconnects (DCIs) will have to support throughputs of 400 Gbps or more per wavelength in the near future. To achieve such high data rates, coherent modulation and detection is used, which conventionally requires high-speed data conversion and signal processing in the digital domain. Alternatively, high-speed signal conditioning and processing could be carried out in co-designed photonic and electronic integrated circuits, in the optical and electrical analog domains, respectively, to achieve reduced power consumption, latency, form factor, and cost. A few demonstrations of analog domain processing electronic integrated circuits (EICs), including those of equalizer and carrier phase recovery (CPR) modules showcase progress in this direction in the literature. In this brief, for the first time, we present integration of a silicon photonic integrated coherent receiver (ICR) module with a CPR module, as a part of a complete coherent receiver solution. A phase shifter in the ICR (fabricated in a 220 nm silicon-on-insulator technology) receives feedback from a CPR EIC, and the combination compensates for the time varying phase offset between the modulated signal and the unmodulated carrier in the closed loop configuration. In this proof-of-concept demonstration, we present experimental results obtained from the stand-alone silicon photonic ICR along with its system level integration with CPR chip, for QPSK signals. The technique can be extended to a higher-order modulation format, such as 16-QAM, for data rate scaling. The proposed scheme is suitable for homodyne systems, such as polarization multiplexed carrier based self-homodyne links.

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Section: Introductionmentioning

confidence: 99%