Beam steering devices without moving parts are highly desirable for their potential application in emerging optical technologies such as holographic optical storage systems, all optical networks, and optical switches. We demonstrate a thin-film waveguide beam deflector device that consists of an electro-optic prism array within a polymer waveguide. An electrode structure defines the prism array within the planar waveguide. The deflection efficiency of 28 mrad/kV and the maximum deflection angle of Ϯ8.4 mrad at Ϯ300 V are obtained for this demonstration device. Further optimization of electrode-field poling and processing is likely to improve these results by at least an order of magnitude. © 2001 Society of Photo-Optical Instrumentation Engineers.

We have demonstrated a polymeric electro-optic modulator based on a 1ϫ2 Y-fed directional waveguide coupler. The symmetric geometry of the 1ϫ2 Y-fed directional coupler provided the modulator unique characteristics of intrinsic 3 dB operating point and two complementary output ends. A low switching voltage of 3.6 V and a high extinction ratio of 26 dB were obtained with the modulator operating at a wavelength of 1.34 m. The modulator was fabricated with a novel electro-optic polymer that was synthesized from polyurethane cross-linking with a chromophore.

We describe a mathematically-rigorous easy -to -use portable topographical mapping technique that within seconds or less can determine the heights of a surface at 16,000 (128x128) distinct sample points. The necessary data derive from (narrow -optical -bandpass) TV images of a surface which has been illuminated and space -coded by a rapid sequence of laser -projected dot patterns.

The response of the corneal epithelium of Dutch-belted rabbits to 50-nsec pulses of 248-nm KrF excimer laser radiation was studied with slit-lamp biomicroscopy. The corneal epithelium was examined at immediate, 1-, 2-and 24-hr postexposure times. At 24 hr, the observations were made with and without fluorescein staining. The damage endpoint (ED,,) was the 50% probability of detecting an opacity or fluorescein uptake. Damage EDso levels of 59 mJ/cm2 for 2-hr post-exposure and 3 mJ/cm2 for 24-hr postexposure (fluorescein uptake) were measured. In general, the damage response level of the cornea was within 20-100% of those values reported for long duration UV exposures. This indicates only a slight departure from reciprocity.

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