Analysis and design of coherent super-heterodyne laser Doppler vibrometer system

Author

Lin, Jen-Dau ; Yeh, Chun-Shin

Author_Institution

Inst. of Ind. Educ., Nat. Changhua Univ. of Educ., Taiwan

fYear

1994

fDate

10-12 May 1994

Firstpage

348

Abstract

In this paper, the authors use the A.O. frequency-shifted Mach-Zehnder interferometer as system´s basic configuration, and propose the coherent super-heterodyne model to achieve system´s high precision and noise-free characteristics. To increase the dynamic linear measurement range, the frequency compression and decompression technique is also discussed in this model, and an example with 64 times measurement range enlargement is given to demonstrate the result

Keywords

Doppler effect; acousto-optical devices; laser velocimetry; light interferometry; vibration measurement; acousto-optical device; coherent super-heterodyne laser Doppler vibrometer; decompression; dynamic linear measurement range; frequency compression; frequency-shifted Mach-Zehnder interferometer; Acoustic beams; Frequency conversion; Frequency measurement; Laser beams; Optical design; Optical fiber polarization; Optical fiber testing; Optical polarization; Signal processing; Vibrometers;

fLanguage

English

Publisher

ieee

Conference_Titel

Instrumentation and Measurement Technology Conference, 1994. IMTC/94. Conference Proceedings. 10th Anniversary. Advanced Technologies in I & M., 1994 IEEE

Conference_Location

Hamamatsu

Print_ISBN

0-7803-1880-3

Type

conf

DOI

10.1109/IMTC.1994.352052

Filename

352052