Accession Number : AD0475168

Title :   HIGHER FREQUENCY ULTRASONIC LIGHT MODULATORS.

Descriptive Note : Summary rept.,

Corporate Author : MICHIGAN UNIV ANN ARBOR INST OF SCIENCE AND TECHNOLOGY

Personal Author(s) : Henry, Edwin E. ; Ring, Harvey

Report Date : NOV 1965

Pagination or Media Count : 14

Abstract : Modern communications technology demands ever-increased bandwidth; in ultrasonic light modulators, the maximum possible bandwidth requires the use of the highest possible transducer frequency. In experiments using water as the delay medium, it was found that the practical limit of the carrier frequency is 65 to 70 Mc. This report describes the results ofultrasonic light modulation experiments in which units equipped with resonant-frequency transducers ranging in frequency from 5 to 65 Mc were used, in 10-Mc steps and with the incident light normal to the ultrasonic wave train. These results are compared with predictions computed from atheory by Hargrove. It is found that good agreement between theory and practice exists, when consideration is given to the effects of transducer loading and attenuation. (Author)

Descriptors :   *LIGHT), (*MODULATORS, (*ULTRASONIC RADIATION, MODULATORS), OPTICAL COMMUNICATIONS, BANDWIDTH, TRANSDUCERS, HIGH FREQUENCY, VERY HIGH FREQUENCY, ATTENUATION, DATA PROCESSING, OPTICAL EQUIPMENT, ANALOG COMPUTERS, THEORY.

Subject Categories : Non-radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE