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The goal of the research program that we describe is to break the emerging performance wall in microprocessor development arising from limited bandwidth and density of on-chip interconnects and chip-to-chip (processor-tomemory) electrical interfaces. Complementary metal-oxide semiconductor compatible photonic devices provide an infrastructure for deployment(More)
Photonic Analog-to-Digital Conversion (ADC) has a long history. The premise is that the superior noise performance of femtosecond lasers working at optical frequencies enables us to overcome the bottleneck set by jitter and bandwidth of electronic systems and components. We discuss and demonstrate strategies and devices that enable the implementation of(More)
We present a systematic study of Mach-Zehnder silicon optical modulators based on carrier-injection. Detailed comparisons between modeling and measurement results are made with good agreement obtained for both DC and AC characteristics. A figure of merit, static VpiL, as low as 0.24Vmm is achieved. The effect of carrier lifetime variation with doping(More)
Sampling rates of high-performance electronic analog-to-digital converters (ADC) are fundamentally limited by the timing jitter of the electronic clock. This limit is overcome in photonic ADC’s by taking advantage of the ultra-low timing jitter of femtosecond lasers. We have developed designs and strategies for a photonic ADC that is capable of 40 GSa/s at(More)
Efficient thermal tuning of 36pm/K and 60μW/GHz is shown for high-index-contrast silicon nitride second-order filters. Their compact size, large free-spectral range, low tuning power, and silicon compatibility make these resonators attractive for photonic integration. ©2007 Optical Society of America OCIS codes: (230.5750) Resonators; (120.6810) Thermal(More)
Advances in microring-resonator-based photonic structures and novel architectures are described that demonstrate the first low-loss telecom-grade filters, wide tuning, polarization transparency, and fully transparent (dispersion-free) wavelength switching using high-indexcontrast (SiNand Si-core), strong-confinement waveguides. A large number of(More)
We describe silicon microring-resonator-based microphotonic circuits that support complete (amplitude and phase) disabling of resonant states, enabling novel capabilities: trulyhitless switching/tuning of high-order, telecom-grade channel add-drop filters, dispersionless FSR multiplication, and “hot-swapping” of photonic subsystems. ©2008 Optical Society of(More)
A novel silicon-on-insulator (SOI) polarization splitter-rotator is proposed based on mode-evolution tapers and a mode-sorting asymmetric Y-junction. The tapers are designed to adiabatically convert the input TM0 mode into the TE1 mode, which will evolve into the TE0 mode in the wide output arm while the input TE0 mode excites the TE0 mode in the narrow(More)
We present the first experimental demonstration of recently proposed loop-coupled resonator device concepts, with characteristic transmission zeros, enabling optimally sharp passbands for channel add-drop filter applications. Fourth-order SiN-core and Si-core strongconfinement microring-resonator designs are described. ©2008 Optical Society of America OCIS(More)