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  1. Mazzali, C. T.; Poon, T.-C.; Averitt, R. (Ed.)
    A wavelength-tunable, silicon photon-pair source based on spontaneous four-wave mixing, integrated with a pump rejection filter in a single, flip-chip packaged CMOS chip, is demonstrated with a coincidence-to-accidentals ratio of 9.1 with no off-chip pump filtering. 
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  2. We demonstrate a monolithically integrated 6th-order filter, with heater driver circuits implemented alongside photonics in a zero-change 45 nm CMOS platform, achieving<1 dB drop loss and>80 dB on-chip pump power suppression. 
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  3. We study spontaneous four-wave mixing and spontaneous Raman scattering (SpRS) in a CMOS microring cavity in the C-band and find that the latter contributes a significant fraction to the signal/idler photon flux. We expect operation in the O-band to be less affected by SpRS due to higher confinement of the O-band light in crystalline Si in this device. 
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  4. We demonstrate a CMOS electronic-photonic photon-pair source with integrated feedback-controlled frequency locking,>80 dB on-chip pump rejection, and signal/idler de-multiplexing, achieving a CAR of ≃5 at ≃40 ccps pair rate. 
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  5. Adiabatic microrings with opposing p/n contacts achieve full carrier sweepout in reverse bias and energy-efficient carrier injection in forward bias, exhibiting 200GHz/V peak shift in C-band for athermal tuning over a 220 GHz range. 
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  6. We demonstrate an efficient silicon waveguide crossing based on the rapid adiabatic coupling (RAC) concept. Insertion loss and crosstalk are under 0.05 dB and -50 dB in simulation and under 0.3 dB and -17 dB in experiment across a 100 nm bandwidth. 
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  7. We experimentally validate the rapid adiabatic coupling (RAC) concept and demonstrate 50±1.4% (3±0.12dB) power splitting over a record 145 nm bandwidth from either port of a 31μm-long, 2×2 coupler, the widest ±1.4%-bandwidth by a factor of 4. 
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