COHERENT OPTICAL BEAM STEERING TECHNIQUES

The technical problems involved in achieving an electronically scanned coherent optical phased array are examined in detail. Background information pertinent to an array design, including studies of coherent optical components, optical losses, limitations imposed by propagation ef fects, and radiati...

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Bibliographic Details
Main Authors: Procopio,Leo W, Jessen,Frederic A, Nave,Peter M, Brown,Lewis J
Format: Report
Language:English
Subjects:
AMPLIFIERS
GASES
LASERS
OPTICAL EQUIPMENT
OPTICAL EQUIPMENT COMPONENTS
OPTICAL SCANNING
OSCILLATORS
PERFORMANCE(ENGINEERING)
PRISMS(OPTICS)
PROPAGATION
REFRACTIVE INDEX
SEMICONDUCTORS
SENSITIVITY
SOLID STATE PHYSICS
X BAND
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Description
Summary:The technical problems involved in achieving an electronically scanned coherent optical phased array are examined in detail. Background information pertinent to an array design, including studies of coherent optical components, optical losses, limitations imposed by propagation ef fects, and radiation patterns generated by laser elements is presented. Techniques to achieve both electronic steering of a single laser beam and a phased array of lasers are analyzed. Studies include consideration of the physical devices themselves, and analysis of their environmental sensitivity, radiation characteristics, and response speeds. Design investigation of the optical phased array includes analysis of the laser oscillator-amplifier combination, the electronically controlled optical phase shifters, the element beam steering devices, and the output telescope systems. Typical design data and performance specifications are presented. Finally, recommendations for further theoretical and experimental research are made. (Author)