Phase linearity and uniformity in optoelectronic-VLSI receiver arrays

Michael B. Venditti; Joshua D. Schwartz; David V. Plant

doi:10.1117/12.451604

15 November 2002 Phase linearity and uniformity in optoelectronic-VLSI receiver arrays

Michael B. Venditti, Joshua D. Schwartz, David V. Plant

Proceedings Volume 4788, Photonic Devices and Algorithms for Computing IV; (2002) https://doi.org/10.1117/12.451604
Event: International Symposium on Optical Science and Technology, 2002, Seattle, WA, United States

Abstract

Parallel synchronous digital links require tight control over inter-channel skew in order to obtain maximum performance. In parallel optical interconnects (POIs), inter-channel skew can arise from differences in optical and electrical path lengths as well as latency variations through transmitters and receivers. The receiver pre-amplifier is particularly susceptible to latency variation. In POI applications such as optoelectronic-VLSI, pre-amplifiers can exhibit variable latency and gain resulting from differences in optical power levels across the receiver array due to transmitter, laser, detector, or optical system non-uniformity. This establishes an input DC photocurrent and pre-amplifier operating point that varies across the array, resulting in gain and phase non-uniformity. We consider different receiver pre-amplifier designs and the susceptibility of their gain and phase delay uniformity to operating point variations. Feedback circuitry that stabilizes the pre-amplifier operating point is considered as a potentially robust approach for array-scale POI skew reduction. Optical ring oscillators are used to characterize the phase delay of different pre-amplifier designs by measuring the period of oscillation as a function of optical system power throughput.

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Michael B. Venditti, Joshua D. Schwartz, and David V. Plant "Phase linearity and uniformity in optoelectronic-VLSI receiver arrays", Proc. SPIE 4788, Photonic Devices and Algorithms for Computing IV, (15 November 2002); https://doi.org/10.1117/12.451604

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KEYWORDS

Receivers

Transmitters

Picosecond phenomena

Optical amplifiers

Optoelectronics

Oscillators

Capacitance

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