Compact diode laser homodyne vibrometers

Christian J. Grund; Harald Guenther; John Connolly

doi:10.1117/12.850591

29 April 2010 Compact diode laser homodyne vibrometers

Christian J. Grund, Harald Guenther, John Connolly

Proceedings Volume 7684, Laser Radar Technology and Applications XV; 76840V (2010) https://doi.org/10.1117/12.850591
Event: SPIE Defense, Security, and Sensing, 2010, Orlando, Florida, United States

Abstract

We discuss the architecture and performance of compact, robust, alignment-free, homodyne vibrometers using telecom diode lasers as the illumination source. The technical challenges and performance of implementations using conventional macroscopic optical components are compared with ultra-miniature micro-bench components and assembly methods. Focused sensitivity exceeding 4.6 pm/SQRT(Hz) at 1m range, 23 pm/SQRT(Hz) at 5m range, and useful operation to >20m have been demonstrated with COTS 1550 nm sources, 1.5 cm transmit/receive beam diameter and 32 mW transmitted power. Vibrometer measurement bandwidth exceeds 100 kHz with current electronics. Demonstrated performance is suitable for a variety of defense, security, and inspection applications.

Citation Download Citation

Christian J. Grund, Harald Guenther, and John Connolly "Compact diode laser homodyne vibrometers", Proc. SPIE 7684, Laser Radar Technology and Applications XV, 76840V (29 April 2010); https://doi.org/10.1117/12.850591

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