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We present experimental investigations of the dynamical properties of semiconductor optical amplifiers (SOAs) and their impacts in all-optical signal processing using SOAs. We introduce ultrafast optical signal characterization techniques to fully characterize the gain and phase dynamics of SOAs. We elucidate a consequence of the slow carrier recovery as(More)
We report generation of 50-Gb/s RZ-DQPSK signal, without an external pulse carver, using an electroabsorption modulators-based hybrid modulator. We demonstrate the first error-free 50-Gb/s RZ-DQPSK generation using a semiconductor-based modulator with low drive voltages of 2.3 V.
We demonstrate all-optical recognition of a byte pattern embedded in phase-shift-keyed data streaming at 40 Gb/s. We use matched filtering to generate an autocorrelation pulse indicating the pattern matching. Matched filtering is implemented using a reconfigurable silica planar-lightwave-circuit optical delay-line filter. We show excellent discrimination(More)
We report a compact hybrid photonic-integrated optical device consisting of AlGaInAs/InP electroabsorption modulators and a four-arm silica-on-silicon planar lightwave circuit optical interferometer. We use the device to generate 50-Gb/s NRZ-DQPSK signal with excellent performances comparable to those of the commercial lithium niobate DQPSK modulators,(More)
We report generation of high spectral-efficiency modulation formats at 86.4 Gbaud/s by all-optical format conversion using a device integrating semiconductor optical amplifies. We demonstrate generation of 173 Gbits/s QPSK signals and 86.4 Gbits/s Binary-PSK signals.
We propose and demonstrate all-optical method for generating advanced modulation formats with high-spectral efficiency. The proposed method is based on all-optical format conversion using photonic-integrated semiconductor optical amplifier-Mach-Zehnder interferometers. It enables application of advanced modulation formats at data rates not directly(More)
We demonstrate a method of minimizing the wavelength sensitivity of the all-optical bit-pattern recognition relying on a passive optical correlator. We accomplish all-optical 40-Gb/s, 8-bit pattern recognition with much reduced wavelength sensitivity by combining a wavelength converter front-end and a passive optical correlator.