In-fiber Doppler velocimeter for velocity measurements of moving surfaces

Y. L. Lo, J. S. Sirkis, W. L. Fourney

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


An optical fiber Doppler velocimeter using a 3 × 3 coupler with a large path imbalance Mach-Zehnder interferometer for passive demodulation of Doppler wavelength shifts is demonstrated. The particle velocity on the free surface end of the Hopkinson bar is directly obtained using the all-fiber Doppler velocimeter. These data show good agreement with the particle velocity predicted using strain gage data combined with one-dimensional stress wave propagation theory.

Original languageEnglish
Pages (from-to)328-332
Number of pages5
JournalExperimental Mechanics
Issue number3
Publication statusPublished - 1997 Sep

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering
  • Mechanics of Materials
  • Mechanical Engineering

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