Real-time nanometer-vibration measurement with a self-mixing microchip solid-state laser
- 1 August 2002
- journal article
- Published by Optica Publishing Group in Optics Letters
- Vol. 27 (15), 1339-1341
- https://doi.org/10.1364/ol.27.001339
Abstract
Nanometer vibration analysis of a target has been demonstrated by a self-aligned optical feedback vibrometry technique that uses a laser-diode-pumped microchip solid-state laser. The laser output waveform, which was modulated through interference between a lasing field and an extremely weak frequency-modulated (FM) feedback field, was analyzed by the Hilbert transformation to yield the vibration waveform of the target. Experimental signal characteristics have been reproduced by numerical simulations. Real-time vibration measurement has also been achieved with a simple FM demodulation circuit.
Keywords
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