A NEW METHOD OF LASER BEAM STEERING USING OPTICALLY CONTROLLED VOLUME DIFFRACTION GRATINGS IS PRESENTED.

Award Information
Agency:
National Aeronautics and Space Administration
Branch
n/a
Amount:
$50,000.00
Award Year:
1983
Program:
SBIR
Phase:
Phase I
Contract:
n/a
Agency Tracking Number:
657
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
Sparta Inc.
21 Worthen Road, Lexington, MA, 02173
Hubzone Owned:
N
Socially and Economically Disadvantaged:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
PHILIP D. HENSHAW
PRINCIPAL INVESTIGATOR
() -
Business Contact:
() -
Research Institution:
n/a
Abstract
A NEW METHOD OF LASER BEAM STEERING USING OPTICALLY CONTROLLED VOLUME DIFFRACTION GRATINGS IS PRESENTED. THIS CONCEPT HAS THE POTENTIAL FOR STEERING A LASER BEAM OVER A WIDE FIELD-OF-VIEW IN A RANDOM ACCESS FASHION AT HIGH SPEED.A METHOD IS INVESTIGATED FOR AUTOMATICALLY CONTROLLING THE SPACING AND ORIENTATION OF THE DIFFRACTION GRATING TO MAINTAIN HIGH EFFICIENCY OVER A WIDE FIELD-OF-VIEW. THE DIFFRACTION GRATINGS ARE WRITTEN IN A PHOTOREFRACTIVE MATERIAL USING A VOLUME INTERFERENCE PATTERN PRODUCED BY A VARIABLE FREQUENCY WRITING LASER. THE GEOMETRICAL ARRANGEMENT OF THE WRITING BEAMS WILL BE OPTIMIZED TO PROVIDE AUTOMATIC ADJUSTMENT OF THE GRATING TO SATISFY BRAGG'S LAW OVER A WIDE FIELD-OF-VIEW. SEVERAL CANDIDATE PHOTOREFRACTIVE MATERIALS ARE DESCRIBED, AND ANALYTICAL AND EXPERIMENTAL METHODS ARE USED TO EXPLORE THEIR SUITABILITY. HIGH SPEED METHODS OF VARYING THE WRITING BEAMS USED TO PRODUCE THE VARIABLE INTERFERENCE PATTERN ARE IDENTIFIED.

* information listed above is at the time of submission.

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