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A modulator with an enhanced efficiency by cascaded microring resonators (MRRs), and a single-mode laser with a wavelength determined by a MRR wavelength filter were integrated on a Si chip to demonstrate for the first time wavelength-tuning-free 10-Gb/s modulation over a wide range of temperature.
High-speed modulation characteristics of 1.3-μm InAs/GaAs high-density quantum-dot lasers are presented. The high-density quantum-dot active layers provided high net modal gain beyond 40cm-1. Fabricated Fabry-Perot lasers have exhibited an extended modulation bandwidth and 25-Gbps direct modulation, for the first time, in 1.3-μm quantum dot lasers.
In this paper, an all optical wavelength multicasting service in AWG-based WDM PON is introduced, and a novel architecture supporting multiple multicasting groups is proposed. The novel characteristic is that different from the PON systems which broadcast the signals to all the receivers, multicasting signals are only delivered to desired users. This restricted member multicasting brings the trusted...
In this paper, an all optical wavelength multicasting service in AWG-based WDM PON is introduced. Two novel architectures of remote node supporting all optical wavelength multicasting functionality are proposed. The interesting characteristic of this function is that, different from the current PON systems which broadcast the signals to all the receivers, here, multicasting signals will be delivered...
Measurement of the performance of a computer network using active measurement techniques is gaining popularity. This paper seeks to evaluate a set of active measurement tools and provide a statistical reference in order to determine the accuracy of the tools. The focus on using statistical methods to evaluate the time series data enhances the credibility, as compared to visually comparing raw time...
Composite insulation system of liquid nitrogen (LN2) and solid insulator, which are widely employed in high-temperature superconducting power equipments, can be deteriorated by partial discharge (PD) generated in highly stressed region such as a triple junction. To investigate the PD mechanism, an individual current waveform of PD generated around the triple junction in LN2 or gaseous nitrogen (GN...
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