RESEARCH ON TECHNIQUES FOR LIGHT MODULATION DETECTION

An applied research program conducted by the Sylvania Microwave Device Division to establish techniques for light modulation detection is covered, and it concludes a one year program on amplitude modulation (AM) detectors. Sufficient information is provided for the detailed under standing, design an...

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Bibliographic Details
Main Authors: Caddes, D E, McMurtry, B J, Siegman, A E, Targ, R
Format: Report
Language:English
Subjects:
AMPLITUDE MODULATION
BROADBAND
ELECTRICAL CONDUCTIVITY
FREQUENCY MODULATION
LASER BEAMS
MEASUREMENT
MICROWAVE EQUIPMENT
MODULATION
OPTICAL COMMUNICATIONS
OPTICAL DETECTION
Optical Detection and Detectors
OPTICAL DETECTORS
PHOTOCATHODES
PHOTOMULTIPLIER TUBES
PHOTOTUBES
SENSITIVITY
TRAVELING WAVE TUBES
TRAVELING WAVES
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Summary:An applied research program conducted by the Sylvania Microwave Device Division to establish techniques for light modulation detection is covered, and it concludes a one year program on amplitude modulation (AM) detectors. Sufficient information is provided for the detailed under standing, design and use of traveling-wave microwave phototubes (TWP's). The major topics are: (1) an analysis of the dependence of power output on the large spread in initial velocities from photoelectric cathodes; (2) analysis of theversion of current modulation to velocity modula tion in the gun region of a TWP; (3) detailed calculations of equivalent conductance, Geq, which expresses the way in which velocity modulation is converted to circuit power; (4) compre hensive measurements on TWP's and comparison with detailed theory; (5) suggestion and utilization of a novel technique for measuring Req; and (6) a summary of research contributions on the AM demodulator program.