PURPOSE To evaluate short wavelength light-induced retinal damage in rats. METHODS Pigmented rats were exposed to 300-500 nm wavelength light for 30 seconds, 1, 3, 10, 20, 60, or 90 minutes. Electroretinogram a-, b-, and c-waves were recorded 48 hours after the exposure. RESULTS While the a- and b-wave amplitudes were reduced significantly after exposures of 60 minutes and longer, the c-wav...

We investigate theoretically and experimentally the process of supercontinuum generated in sub-wavelength waveguides. We observe experimentally that supercontinuum generated in these photonic nanowires is increasingly blueshifted from the pump wavelength for decreasing minimum core diameters. We also find the spectral features are sensitive to the specific nanowire profile. Numerical simulation...

We investigated how poultry chicks discriminate textures of lines sharing a common orientation from textures of variably oriented lines. Stimulus colours along with illumination were adjusted to selectively stimulate different receptor mechanisms. Chicks could discriminate achromatic textures, but not textures isoluminant to the double cones that gave a long vs. medium wavelength chromatic sign...

Contention resolution schemes are the key determinant of the network performance in optical packet switched networks. This paper presents a contention resolution scheme in wavelength and space dimension. By integrating deflection routing with wavelength conversion, this paper investigates their effects on packet-loss performance through simulation studies. In particular, we propose a load-sensi...

The use of ultra-broadband supercontinuum generated by an all-fiber system to characterize high-index contrast photonic circuits over the wavelength range 1.2 - 2.0 microm is demonstrated. Efficient, broadband waveguide coupling techniques and sensitive normalized detection enable rapid and high-resolution measurements of nano-scale one-dimensional photonic crystal microcavities. Experimental m...