Chirped quasi-phase-matched optical parametric amplifiers (chirped QPM OPAs) are investigated experimentally. The measured collinear gain is constant over a broad bandwidth, which makes these devices attractive candidates for use in femtosecond amplifier systems. The experiment also shows that chirped QPM OPAs support noncollinear gain-guided modes. These modes can dominate the desired collinea...

Computation off-loading, i.e., remote execution, has been shown to be effective for extending the computational power and battery life of resource-restricted devices, e.g., hand-held, wearable, and pervasive computers. Remote execution systems must predict the cost of executing both locally and remotely to determine when off-loading will be most beneficial. These costs however, are dependent up...

this paper presents a comprehensive case study on electro-mechanical analysis of mems[1] variable capacitors. using the fundamental mechanical and electrical equations, static and dynamic behaviors of the device are studied. the analysis is done for three different modes, namely: dc (static mode), small signal ac and large signal regime. a complete set of equations defining dynamic behavior of ...

High brightness mid-IR sources have matured and are becoming viable solutions to many medical, defense, and sensing demands. Recently, super-continuum from 3.6-4.8μm with an average power of 22W has been demonstrated using a ZGP optical parametric oscillator [1]. To fully utilize the power and bandwidth of sources like these, passive optical components possessing both high optical and high ther...

We carry out a nonparametric analysis of financial durations. We make use of an existing algorithm to describe nonparametrically the dynamics of the process in terms of its lagged realizations and of a latent variable, its conditional mean. The devices needed to effectively apply the algorithm to our dataset are presented. On simulated data, the nonparametric procedure yields better estimates t...

In a parametric amplifier (PA) driven by two pump waves the signal sideband is coupled to three idler sidebands, all of which are frequency-converted (FC) images of the signal, and two of which are phaseconjugated (PC) images of the signal. If such a device is to be useful, the signal must be amplified, and the PC and FC idlers must be produced, with minimal noise. In this paper the quantum noi...

The last few decades have witnessed tremendouis progress in the performance, reliability, and wide-spread use of speech-processing devices. Using mathematical models of human speech production and perception has been an important factor in the improved performance of these devices. In this tutorial paper, we review recent advances in speech production and perception modeling and summarize the c...

The last few decades have witnessed tremendous progress in the performance, reliability, and wide-spread use of speech-processing devices. Using mathematical models of human speech production and perception has been an important factor in the improved performance of these devices. In this tutorial paper, we review recent advances in speech production and perception modeling and summarize the ch...

Our recent results on the demonstration of on-chip mode-division multiplexing functionalities are reviewed, with a special emphasis on the feasibility of nonlinear all-optical signal processing on the silicon-on-insulator (SOI) platform. Mode-selective parametric processes are demonstrated in a 4-mm long SOI waveguide. OCIS codes: (130.3120) Integrated optics devices; (030.4070) Modes; (130.740...