While different optical flow methods continue to appear , there has been a lack of quantitative evaluation of existing methods. For a common set of image sequences , we report the results of regularly cited techniques , including instances of differential, matching, energy-based, and phase-based approaches.

We experimentally study a new regime for supercontinuum (SC) generation in the nanosecond pulsed regime using a microstructured optical fiber with two zero-dispersion wavelengths (ZDWs). Pumping at 1535 nm around the second ZDW yields a nearly flat SC over 1350–1700 nm. The interplay between the effects of modulation instability and stimulated Raman scattering are described through simple phase...

This paper deals with the theory and device applications of periodic thin-film waveguides. Topics treated include mode solutions, optical fiiters, distributed feedback lasers (DFB), distzibuted B r a g reflector (DBR) lasers, grating couplers, and phase matching in nonlinear interactions.

Weak material nonlinearity at optical frequencies poses a serious hurdle to realizing optical bistability at low optical powers, which is a critical component for digital optical computing. In this paper, we explore the cavity enhancement of the second-order optical nonlinearity in order to determine the feasibility of few photon optical bistability. Starting from a quantum optical formalism of...

In optical modulation, the highest available modulation rate is basically limited to the GHz frequency range at best. This is because optical modulation is often performed using electro-optic or acousto-optic effects that require application of an external signal to solid-state nonlinear optical materials. Here we describe optical modulation of continuous-wave radiation at frequencies exceeding...

Impulsive stimulated Raman scattering can be used to generate a wide range of coherent low-lying excitations [1] and, in particular, phonon-polaritons which are hybrid modes resulting from the coupling of infrared-active transverse optical phonons to infrared photons. In most cases reported in the literature, phase matching is achieved by using the so-called traveling grating geometry involving...