We propose and numerically verify a novel scheme of all-optical format conversion from non-return-to-zero (NRZ) to binary phase-shift- keying (BPSK) at 160 Gb/s using cascaded microring resonators (CMRR) on a single silicon chip. The conversion is based on large phase shift and flattened intensity-response characteristics in the CMRR. A continuous-wave light experiences different phase shifts c...

Optical digital-to-analog converters (DACs) are key to overcoming the enormous power consumption caused by slowdown of Moore's Law. In previous work, an optical DAC consisting a signal generator and intensity converter was presented. The generating component integrated into device, but higher level device integration is desirable. An with built-in for 2-bit binary phase-shift keying (BPSK) demo...

Reportamos un lazo de Costas para demodulación campo óptico con modulación fase binaria (BPSK). El opera en el dominio del procesamiento digital señales (DSP) como parte receptor coherente intradino. La implementación práctica BPSK generalmente no es factible. Por ello, empleamos técnicas basadas la digitalización a alta velocidad observable eléctrico post-fotodetección y DSP actúa sobre señal ...

Abstract For space-based laser communications, when the mean photon number per received optical pulse is much smaller than one, there a large gap between communications capacity achievable with receiver that performs individual pulse-by-pulse detection, and quantum-optimal “joint-detection receiver” acts collectively on long codeword-blocks of modulated pulses; an effect often termed “superaddi...

In wireless communication systems, signal transmission through a channel can not avoid the influence of noise. When it reaches receiver, is accompanied by time delay and attenuation. Therefore, observed mixture signals at receiver are convolutional mixed with noise contamination. To solve problem traditional frequency-domain based convolutive blind separation methods have poor performance for n...