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Silver thiogallate, AgGaS2[sub], is an attractive nonlinear crystal for the generation of tunable laser radiation from 2 to 12 microns. Its application is limited by surface and bulk absorption. It is proposed to address this absorption problem by characterizing single crystals grown from off-stoichiometric Ag2[sub]S-rich solutions, as well as from conventionally grown crystals from near stoichio ...

A continuously tunable laser source covering the 2-5 micron wavelength region is proposed. Light generated by a diode laser pumped tunable Cr:LiSAF laser is Raman shifted twice in Hydrogen to nicely cover the 205 micron window. The unique feature of the proposed laser is that the Raman shifting cell and optics are placed inside the pump laser cavity. As a result sufficient gain and interaction len ...

High speed, low cost, light weight, and reliable systems that can significantly improve performance are sought for the next generation of military communications systems. The recent advent of broadband communication services has dramatically increased this demand. The opportunity exists to merge two of the most promising advances in cornmunications: acoustic charge transport (ACT) devices and neur ...

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The Balloon Electronics Control System (BECS) currently used by the Phillips Laboratory is based on custom electronics. Although the BECS performs the necessary balloon control functions reliably, it is not easily reconfigured when system requirements change. These modifications can affect both the cost and schedule of an experiment. In addition, it offers only limited support for onboard experime ...

A method is proposed to convert creosote-treated waste wood into high-gradegranular activated carbon, with surface area of 900-1800 m2/gram. Creosote,widely used to protect wood, is a hazardous substance, ID# NA9189. Creosotetreated waste wood consists of utility poles, pier posts, and railroad ties. InNew Jersey about 50,000 ton/year are collected, while over the entire USA, anestimated 1.5 M ...

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Commercial perimeter monitoring systems rely heavily upon visual band CCD surveillance cameras. To enhance monitoring operations at night, the military often adds IR surveillance technology, as well as low light TV capability. In all of these image-based monitoring activities, we expect a human operator to confirm intruder alerts before the intruder is close enough to be positively identified. T ...

An approach to helping pilots reduce or eliminate the consequences of errors is proposed. These consequences-to-be-avoided are termed "hazards." The approach is based upon the idea that it is hazard, rather than error, that should be avoided. It is impossible to prevent all errors; attempting to do so will interfere with learning and innovation in a crisis. The proposed hazard monitor (HM) models ...