Previous work has demonstrated the success of statistical language models when enough training data is available [1], but despite that, grammar-based systems are proving the preferred choice in successful commercial systems such as HeyAnita [2], BeVocal [3] and Tellme [4], largely due to the difficulty involved in obtaining a corpus of training data. Here we trained an SLM on data obtained usin...

One of main disadvantage of Orthogonal frequency division multiplexing (OFDM) is high peak-to-average power ratio (PAPR). In this paper, two effective PAPR reduction schemes are proposed. These techniques combine the DCT and SLM techniques. The scheme 1 is composed of the DCT followed by the SLM technique, and the DCT is used followed by conventional SLM in proposed scheme 2. Simulation results...

We demonstrate beyond 10W simultaneous temporal and spatial pulse-shaping on a picosecond fiber laser system. Our proposed technique can substantially enhance the capability and efficiency of the existing ultrashort fiber laser systems for high precision material processing. OCIS codes: (140.0140) Lasers and laser optics; (140.3070) Infrared and far-infrared lasers; (140.3300) Laser beam shapin...

We have developed optically-addressed and electrically-addressed liquid crystal spatial phase-only light modulators without pixelized structures. We obtained a large depth of phase-only modulation based on the electro-optical characteristics of a parallel-aligned nematic liquid crystal. We also confirmed that the satisfactory phase modulation capability and high diffraction efficiency of these ...

A two-phase scheme for accurate predictions of interlaminar stresses in laminated plate and shell structures has been addressed in this study. A modified superconvergent patch recovery (MSPR) technique has been utilized to obtain accurate nodal in-plane stresses which are subsequently used with the thickness integration of the three-dimensional equilibrium equations to evaluate the transverse s...

Spatial (phase-only) light modulators (SLMs) have successfully been used for different tasks in microscopy, one prominent example being the doughnut beam shaping in STED nanoscopy [1]. Once implemented into the laser beam path of a microscopic imaging system, its free programmability makes the SLM a versatile instrument for multiple uses. Aberration correction in such a retrofitted system, for ...

One major limitation of wireless systems is the fading channel that exists between users and the base station. When a user’s channel realization is bad, it may be unable to communicate with the base station. To overcome this problem, many different forms of diversity have been studied including: spatial, temporal, and frequency diversity. Recently, there has been an increasing popularity in a s...

Giving a new physical interpretation to the principle of longitudinal coherence control, we propose an improved method for synthesizing a desired spatial coherence function along the longitudinal axis of light propagation. By controlling the irradiance of an extended quasi-monochromatic spatially incoherent source with a spatial light modulator, we generated a special optical field that exhibit...

It is axiomatic that most children, unlike adults, learn to speak and understand a second language (L2) in a native-like manner1 (Munro, Flege, & MacKay, 1996). One of the most salient factors influencing the outcome of child and adult L2 learning is the effect of the leamer's native language (Ll) on the ability to learn L2 consonants and vowels (or "sounds" for short). Adult L2 learners' speec...

Iris recognition has become popular in recent years due to its rich textures and high accuracy. However, a major constraint in current iris recognition systems is the very shallow depth-of-field (DOF) that limits system usability and increases system complexity. In this paper, we used a spatial light modulator in place of the traditional cubic phase mask to dynamically optimize the wavefront co...