Laser vibration sensor

Madhu A. Acharekar; Philip Gatt; Lawrence J. Mizerka

doi:10.1117/12.212015

16 June 1995 Laser vibration sensor

Madhu A. Acharekar, Philip Gatt, Lawrence J. Mizerka

Proceedings Volume 2472, Applied Laser Radar Technology II; (1995) https://doi.org/10.1117/12.212015
Event: SPIE's 1995 Symposium on OE/Aerospace Sensing and Dual Use Photonics, 1995, Orlando, FL, United States

Abstract

An eye safe Ho:YAG laser operating cw at 2.09 micrometers was used as the transmitter for this laser radar (ladar) system. The diode pumped Ho:YAG laser provided up to 100 mW of single frequency output power. An InGaAs detector was selected as the off-set homodyne receiver for vibration signatures. This paper describes the design and characteristics of the laser vibration sensor that is based on laser Doppler radar. Initially, the sensor was calibrated using a piezoelectric loudspeaker, then vibrational signatures were obtained for automobiles having four and eight cylinder engines. This two micron laser Doppler radar permitted high- resolution vibrational signatures detection, remotely, at ranges up to 50 meters.

Citation Download Citation

Madhu A. Acharekar, Philip Gatt, and Lawrence J. Mizerka "Laser vibration sensor", Proc. SPIE 2472, Applied Laser Radar Technology II, (16 June 1995); https://doi.org/10.1117/12.212015

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