External cavity laser diode sensing for vibration measurement in aerospace applications

N. A J Lieven, I. H. White, C. Mignosi, R. P. Griffiths, R. V. Penty

Research output: Contribution to journalConference articlepeer-review


This paper reports a preliminary study of a recently proposed vibration sensor using an external cavity laser sensor. The behaviour of the sensor is compared with conventional laser interferometers used for aerospace applications. It is found that the new method has advantages in the relatively few optical components that are required, namely: a collimated laser diode, and a reflective surface at the point of incidence on the structure. In addition, output of the device is an absolute measure of displacement. As well as outlining the principle of operation of the device, the practical issues of application are discussed. Although the system is still in development it offers the prospect of a low-cost, robust alternative to standard laser vibrometry.

Original languageEnglish
Pages (from-to)78-84
Number of pages7
JournalProceedings of SPIE - The International Society for Optical Engineering
Publication statusPublished - 1 Dec 1998
EventThird International Conference on: Vibration Measurements by Laser Techniques: Advances and Applications - Ancona, Italy
Duration: 16 Jun 199819 Jun 1998

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics


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