Recent work in volume holography has led to the discovery of the orthogonal data storage technique. this method of holographic data recording reduces the crosstalk between channels by storing many wavelength multiplexed images in a particularly effective use of k-space. further reduction in… More

Bbo and lbo class materials were studied for possible application as uv-sensitive photorefractive materials. undoped samples of bbo and lbo were doped by high temperature diffusion with various transition metal species to determine their suitability for storing high efficiency holographic gratings.… More

Narrow bandwidth filters using holographic reflection gratings will be developed for application in solar atmospheric studies, where rapid wavelength tunability over about a 1 A range is required. A holographic grating filter for monochromatic imaging at the Ha line has already been demonstrated by… More

Accuwave Corporation has developed a narrow bandwidth (1/8 angstrom) optical imaging filter operating in the red. A critical need exists for narrow bandwidth imaging filters with a wide field of view. In this proposed research effort, Accuwave filter technology will be extended to a wider field of… More

Accuwave Corporation will study the feasibility of a volume holographic, phase-encoded optical image correlator for credit card and document validation and security application. Fourier transform holograms of a phase-encoded input image are stored using wavelength multiplexed holographic gratings… More

In this proposed SBIR program, Accuwave will investigate and demonstrate architectures for compact hologrpahic storage using materials and system innovations to reduce complexity and improve performance. Crosstalk, data formatting, input/output interfaces, and other relevant parameters will be… More

Accuwave Corporation will demonstrate an optical limiter for sensor protection using two-beam coupling in a photorefrac-tive material to attenuate coherent input light while leaving incoherent light unaffected. Methods for decreasing response time in BaTiO3, SBN, and similar materials will be… More

Accuwave Corporation will demonstrate a new approach to obtaining wide field of view imaging ( up to 15 degrees full angle) with a holographic grating filter. This new approach will make the filter element independent of the detector array dimensions, enabling resolution changes to be made without… More

The innovation proposed in this SBIR program is to develop a threat warning system against airborne laser radars in the blue-green transmission window. The proposed sensor system characterizes a sample through wavlelength, temporal, and spatial (theta fi) characteristics of the backscattered and… More