Now showing items 1-10 of 18
Redundancy modulation for coherent imaging systems
(Elsevier, 1973-01)
In order to image continuous-tone transparencies with coherent light, special types of diffuse speckle-free illumination are required to achieve high image quality. Several types of speckle-free modulation have been ...
Multi-mode holographic waveguide coupler
(Elsevier, 1975-10)
A double-exposure thick-holographic-grating waveguide coupler is described in which two waveguide modes can be excited with a single incident beam. Single-grating decouplers are also designed to selectively remove one of ...
Temperature dependence of ionization rates in AlxGa1-xAs
(Elsevier, 1971-07)
The ionization rates in AlxGa1-xAs have been measured in a temperature range from 77[deg]K to 373[deg]K for samples with various Al content. The results showed that the ionization rates decrease with both the Al content ...
Equation formulation considerations for efficient numerical modeling of semiconductor phenomena
(Elsevier, 1975-09)
This paper highlights the importance of equation formulation and associated programming efficiency with respect to modeling of semiconductor phenomena via numerical methods.Two numerical modeling efforts are developed in ...
Equivalence of the thin-grating decomposition and coupled-wave analysis of thick holographic gratings
(Elsevier, 1975-10)
The method of thin grating decomposition, which is derived entirely from thin-grating diffraction theory, is shown analytically to be equivalent to the coupled-wave solution of Maxwell's equations for a thick sinusoidal grating.
Transient analysis of the TRAPATT mode in avalanche diodes
(Elsevier, 1978-10)
The start-up transient behavior of the TRAPATT mode of oscillation in both n+pp+ and p+nn+ Si avalanche diodes is studied by computer simulation in the time domain through a device-circuit interaction program. The start-up ...
Solid state- and magneto-chemistry of the SrO-Fe2O3 system : III. The non-existence of single-phase "SrFe2O4"
(Elsevier, 1979-11)
A detailed Mossbauer investigation of 1 : 1 SrO : Fe2O3 has shown that a single phase with the SrFe2O4 composition does not exist in the SrO-Fe2O3 system when SrCo3 and Fe2O3 are reacted in air. A multiphase assemblage of ...
A new technique of incoherent complex signal detection
(Elsevier, 1978-10)
A new technique of incoherent complex spatial filtering is presented. The advantage of this technique is its use of white light, for which the unavoidable coherent noise in the coherent optical processor may be removed. ...
Modular optics interferometer
(Elsevier, 1977-06)
A waveguide interferometer is assembled using holographically formed optical elements that are constructed as individual components and can be selectively attached to an optical waveguide. The interferometer is very rugged ...
Determining the phase of line objects by measuring their intensity in dark field and bright field illumination
(Elsevier, 1973-06)
The in situ phase of a transparent line object can be calculated from measurements of its bright field and dark field intensity. If the sampling aperture is a slit, the background can be subtracted out for increased accuracy. ...