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Proceedings Paper

3-axis accelerometer based on lasers locked to π-shifted fibre Bragg gratings
Author(s): Gianluca Gagliardi; Mario Salza; Timothy T.-Y. Lam; Jong H. Chow; Paolo De Natale
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Paper Abstract

We report on the development of a high-bandwidth, 3-axis accelerometer using π-shifted fibre Bragg gratings. The gratings are inserted into a cantilever system and interrogated by three separate telecom-grade distributed-feedback diode lasers. These lasers are frequency locked to the sensors using a radio-frequency Pound-Drever-Hall technique. This scheme reduced the effect of laser's amplitude noise and allowed for an acceleration dynamic range of at least 20 g. An operation bandwidth of 500 Hz is demonstrated so far with sensitivities between 20 and 50 μg/√Hz.

Paper Details

Date Published: 5 October 2009
PDF: 4 pages
Proc. SPIE 7503, 20th International Conference on Optical Fibre Sensors, 75033X (5 October 2009); doi: 10.1117/12.835163
Show Author Affiliations
Gianluca Gagliardi, Istituto Nazionale di Ottica Applicata, CNR (Italy)
Mario Salza, Istituto Nazionale di Ottica Applicata, CNR (Italy)
Timothy T.-Y. Lam, Australian National Univ. (Australia)
Jong H. Chow, Australian National Univ. (Australia)
Paolo De Natale, Istituto Nazionale di Ottica Applicata, CNR (Italy)


Published in SPIE Proceedings Vol. 7503:
20th International Conference on Optical Fibre Sensors
Julian D. C. Jones, Editor(s)

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