3-axis accelerometer based on lasers locked to &#960;-shifted fibre Bragg gratings

Gianluca Gagliardi; Mario Salza; Timothy T.-Y. Lam; Jong H. Chow; Paolo De Natale

doi:10.1117/12.835163

5 October 2009 3-axis accelerometer based on lasers locked to π-shifted fibre Bragg gratings

Gianluca Gagliardi, Mario Salza, Timothy T.-Y. Lam, Jong H. Chow, Paolo De Natale

Proceedings Volume 7503, 20th International Conference on Optical Fibre Sensors; 75033X (2009) https://doi.org/10.1117/12.835163
Event: 20th International Conference on Optical Fibre Sensors, 2009, Edinburgh, United Kingdom

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.

Citation Download Citation

Gianluca Gagliardi, Mario Salza, Timothy T.-Y. Lam, Jong H. Chow, and Paolo De Natale "3-axis accelerometer based on lasers locked to π-shifted fibre Bragg gratings", Proc. SPIE 7503, 20th International Conference on Optical Fibre Sensors, 75033X (5 October 2009); https://doi.org/10.1117/12.835163

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