Title :
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
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;
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
DOI :
10.1109/IMTC.1994.352052
