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Hybrid silicon DQPSK receiver
Abstract
We present a monolithic 50 Gb/s DQPSK receiver on hybrid silicon, consisting of delay interferometers, phase shifters, balanced InGaAs p-i-n photodetectors, and MIS capacitors. Preliminary measurements of stand-alone PDs show 23-28 GHz 3dB bandwidth.
A heterogeneously integrated WDM receiver based on an AWG demultiplexer and hybrid silicon/InGaAs detectors is presented in a novel platform that combines hybrid silicon components with ultra-low loss silicon nitride waveguides.
The growth in network data-rates is outpacing several constituent technologies, which is creating new challenges that cannot be readily overcome through simple extensions of previous approaches. This paper contributes by identifying new challenges facing the emerging data-communication protocols in the 400 Gb/s to 1 Tb/s range. Three particular challenges are presented along with their respective design implications and options: off-chip data interfaces; on-chip data busses; and off-chip buffering.
We present a monolithic silicon polarization-division multiplexed (PDM) differential quadrature phase-shift keying (DQPSK) receiver front-end. It contains an endless polarization controller, two Mach-Zehnder delay interferometers, two hybrids, and eight photodetectors. We demonstrate 43-Gb/s PDM-DQPSK reception and automatic endless polarization tracking.
We demonstrate an integrated triplexer on silicon with a compact size of 1mm by 3.5mm by utilizing a selective area wafer bonding technique. The wavelength demultiplexer on the triplexer chip successfully separates signals at wavelengths of 1310 nm, 1490 nm and 1550 nm with more than 10 dB extinction ratio. The measured 3 dB bandwidth of the integrated laser and photodetectors are 2 GHz and 16 GHz, respectively. Open eye diagrams are also measured for the integrated photodetector up to 12.5 GHz PRBS inputs.
Advanced optical modulation formats have become a key ingredient to the design of modern wavelength-division-multiplexed (WDM) optically routed networks. In this paper, we review the generation and detection of multigigabit/second intensity- and phase-modulated formats and highlight their resilience to key impairments found in optical networking, such as optical amplifier noise, chromatic dispersion, polarization-mode dispersion, WDM crosstalk, concatenated optical filtering, and fiber nonlinearity
Advances in Optical Technologies
- H Park
- A W Fang
- D Liang
- Y.-H Kuo
- H.-H Chang
- B R Koch
- H.-W Chen
- M N Sysak
- R Jones
- J E Bowers