Accession Number:

ADA141874

Title:

Pulsed-Laser Generation of Ultra-Short Acoustic Pulses: Application for Thin-Film Ultrasonic Measurements.

Descriptive Note:

Technical rept.,

Corporate Author:

IBM RESEARCH LAB SAN JOSE CA

Personal Author(s):

Report Date:

1984-05-18

Pagination or Media Count:

19.0

Abstract:

We demonstrate opto-acoustic generation and detection of acoustic pulses of 1 nanosecond duration in condensed matter. Such opto-acoustic pulses are at least one order of magnitude shorter than those previously reported. These narrow acoustic pulses find new application for thin-film pulse measurement which are not possible with conventional transducer techniques. Round trip echo times are measured to 1 accuracy for stainless steel films of 12 micron thickness. This provides a new high accuracy thickness measurement in a pulsed mode. Ultrasonic attenuation for the narrow acoustic pulses are very large and are also measured. Author

Subject Categories:

  • Acoustic Detection and Detectors
  • Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE