Abstract Multi-mode waveguides are ubiquitously used in integrated photonics. Although interaction among different spatial waveguide eigenmodes can induce novel nonlinear phenomena, mode is typically undesired. Adiabatic bends, such as Euler have been favoured to suppress interaction. Here, we adapt and optimize bends build compact racetrack microresonators based on ultralow-loss, multi-mode, s...

Composite films on the base of ZnO with different weight percentages of polypyrrole have been prepared using the hot pressing method and their current-voltage characteristics have been studied. Results show that the films have nonlinear varistor behavior and can be used to protect sensitive circuits from 110V up to 350V overvoltages. It is found that the higher the content...

Bang-Bang clock and data recovery (BBCDR) circuits are hard nonlinear systems due to the nonlinearity introduced by the binary phase detector (BPD). The specification of the CDR frequency response is determined by jitter tolerance and jitter transfer. In this paper, jitter transfer and jitter tolerance of the second-order BBCDR are characterized by formulating the time domain waveforms. As a re...

Abstract Switch-mode circuits play important role in contemporary power electronics. A vector network method has been introduced for such circuits simulation on the ideal switch level. It is applicable to passive and active linear and nonlinear circuits of any topology. Dirac responses up to a priori assumed order may appear. The mathematical principle of the method is expansion of the circuit ...