Other

Battelle Development Corporation

USA As Represented by Secretary of the Navy

United States of America As Represented by the Secretary of the Air Force

Henry J Caulfield

Jacques E Ludman

John Sampson

Joseph L Horner

Richard P Bocker

Keith Bromley

William T Rhodes

A electrooptic systolic array architecture performs matrix-matrix multiplication using incoherent light. The incoherent light is collimated and passed through a polarizing beamsplitter and onto a pair of optically reflecting light valves. Each of the valves has a number of cells which are continuously being updated in a clocked sequence to vary their reflectivity in acc

Matrix-matrix multiplication using an electrooptical systolic/engagement

Provided are a series of analog quantities that are approximately proportional respectively to the components of a third array that is the product of a first array of components multiplied by a second array of components in a predetermined order. Light of intensity approximately proportional to the first component of the first array is directed to the input side of a modulator whose output light intensity is approximately proportional to an electrical signal applied to it. Applied to the modulator, while the light is passing through it, is a signal approximately proportional to the first component of the second array, so that the intensity of the output light from the modulator is approximately proportional to the product of the two first components. The output light from the modulator is directed to a detector for providing an electrical signal that is approximately proportional to the product of the two first components. After predetermined times, the above steps are repeated with the second then the third, etc., and finally with the last component of the first array and the last component of the second array to provide a similar electrical signal each time; and the individual product signals are directed to summers, so that each provides an output that is approximately proportional to a component of the third array.

Optical systolic array processing

A fiber optic cable connector for coupling together a pair of optical fibers having a pair of fixtures, each of the fixtures securing therein a respective optical fiber and having a magnification lens optically aligned with the end of the optical fiber. The lenses and fibers are so positioned relative to each other so as to focus a magnified or enlarged image of the end of each of the fibers to a predetermined position. A fastening means is utilized to removably attach the fixtures together in such a manner that the positions of the enlarged images of the fibers overlap thereby achieving excellent coupling of the adjacent fiber optic ends.

Fiber optic cable connector

A fiber Fourier spectrometer having a focusing element, a beamsplitter, a pair of monomode optical fibers, a block of electro-optic material defining a pair of optical paths and means for controlling the effective length of one of the optical paths. A source of electromagnetic radiation is focused through and reflected by the beamsplitter into the pair of monomode fibers, respectively, and from there to the respective optical paths within the electro-optic block of material. The outputs of the two optical paths are combined and received by an intensity detector. Varying the effective path length of one of the optical paths alters the phase of the beam passing therethrough. Because the source of electromagnetic radiation has different wavelengths, the spectral components of the source are phase retarded by different amounts as they pass through the electro-optic material and can therefore be analyzed by a conventional Fourier spectroscopy technique.

Fiber fourier spectrometer

Methods and apparatus for providing an optical analog quantity proportional to ##EQU1## Input light (a.sub.4) of intensity proportional to a.sub.n is directed (21,31) to the input end of an nth optical module comprising a modulator (22) whose output light intensity is responsive to an electrical potential difference across it and a beam combiner (23). While the light is passing through the modulator (22), a potential difference (24) is applied across it such that the intensity of the output light from the modulator (22) is proportional to a.sub.n x, and this light (a.sub.4 x) is directed, through the beam combiner (23), to the output end of the optical module. Input light (a.sub.3) of intensity proportional to a.sub.n-1 is directed (25), via the beam combiner (23), to the output end of the optical module, to combine with the light from the modulator (22) so that the intensity of the output light (32) from the nth optical module is proportional to a.sub.n x+a.sub.n-1 ; this light is directed to the input end of an (n-1)th optical module essentially similar to the nth; and so on in the same manner; and finally to the first module, so that its output light has an intensity proportional to p(x).

Method of evaluating a polynomial function using an array of optical

A fiber stellar interferometer having a pair of adjustably movable focusing lenses, a pair of monomode optical fibers, a block of electro-optic material defining a pair of optical paths, means for controlling the effective path length of one of the optical paths and an intensity detector. Electromagnetic radiation emanating from a source, such as a star, is received at two separate locations by the focusing lenses which direct this electromagnetic radiation into two separate beams which are focused into each of the pair of monomode fibers, respectively. The monomode fibers direct these two beams into respective optical paths within the electro-optic block of material. The outputs from the two optical paths are combined and received by the intensity detector. Varying the effective path length of one of the optical paths alters the phase of the beam passing therethrough. As a consequence thereof the intensity of the output received by the detector varies accordingly. These varying intensities can be utilized to determine the size and shape of the source by conventional stellar intensity interferometer techniques.

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Nagog Woods, MA, United States of America

Henry J Caulfield