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This paper presents a 40 nm CMOS V-band voltage-controlled oscillator (VCO). With using on-chip body bias voltage control technique, the phase noise and stability of the output signal are improved. The design was fabricated by RF Mixed-signal CMOS process with die size 0.078 mm2. Based on the silicon results, the proposed V-band VCO can achieve the phase noise of-86 dBc/Hz at 1 MHz offset. The VCO...
Nonlinear phase noise (NPN) in polarization-division-multiplexed DPSK systems is analyzed. It is found that the absolute NPN is inversely proportional to the square-root of channel spacing, while the differential NPN depends on the launch condition.
All-optical regeneration of differential phase-shift keyed signals by an interferometric phase-sensitive amplifier is described theoretically and demonstrated experimentally. Measurements reveal simultaneous reduction of both phase and amplitude noise when the device functions as a limiting amplifier
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