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By monitoring the spontaneous emission from electron‐beam‐excited xenon difluoride (XeF 2 ) plasmas, the radiative lifetime of XeF∗ C (1/2) has been determined. Excited XeF was formed directly through electron‐impact dissociative excitation of XeF 2 . The time behavior of the subsequent...
Phase holograms have been formed in pure outdiffused LiNbO 3 waveguides using the photorefractive effect initiated by two‐photon absorption. Efficient holograms were recorded with two guided waves, of less than 100 W peak power, and less than 10 μJ optical energy. This technique automatically...
We propose and demonstrate the operation of a novel bistable optical device that exhibits differential gain and can function as an optical switch, limiter, or optical memory element.
Point‐contact Schottky diodes have been used to detect 10.6‐μ radiation. Best results were obtained with n ‐Ge/W contacts. These gave voltage responsivity about an order of magnitude larger than typical metal‐oxide‐metal point contacts under zero‐bias conditions, although with higher...
Experiments have been conducted to determine the feasibility of the theoretical experiment set forth by Cazaux. The experiment consists of electron bombarding a thin foil of aluminum with a thin specimen mounted on the opposite side. A focused scanning electron beam is used to bombard the...
Diffraction‐limited performance has been achieved in discharge‐excited KrF and XeF lasers by using an unstable resonator configuration. A peak power of 5 MW (50 mJ) was produced from a Blumlein circuit with stored energy of only 5 J.
Spatially resolved measurements of the red (1.9 eV) and infrared (1.27 eV) luminescence, resulting from near‐edge and deep‐level recombinations, respectively, are presented. The samples are excited by current injection at 300 K and measured before and after a period of stressed operation. An...
Bistability, differential gain, discriminator, clipper, and limier actions were observed using a plano‐concave Fabry‐Perot cavity containing ruby. Input powers were approximately 20 mW from a cw ruby laser. Operation wa anticipated near 77 °K where the R 1 transition was nearly resonant with...
Wafer curvature measurements from 25 to 1075 °C are used to demonstrate viscous flow of thermally grown SiO 2 at temperatures as low as 960 °C. Both O 2 ‐ and steam‐grown oxides are examined and found to have viscosities similar to synthetic fused silica. It is recommended that...
A direct determination is made of the total power radiated in a single pulse, F P (ω) d ω, by an intense relativistic electron beam cyclotron maser configuration as a function of applied magnetic field. The existence of other possible instabilities over a broad spectral range notwithstanding,...
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