Optical fiber three-axis accelerometer based on lasers locked to π phase-shifted Bragg gratings

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

doi:10.1088/0957-0233/21/9/094010

Optical fiber three-axis accelerometer based on lasers locked to π phase-shifted Bragg gratings

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

Research output: Contribution to journal › Article › peer-review

30 Citations (Scopus)

Abstract

We report on a high-bandwidth, three-axis accelerometer developed with π phase-shifted fiber Bragg gratings. The gratings are inserted into a cantilever system and interrogated by three separate telecom distributed-feedback diode lasers. The lasers are frequency locked to the sensors using a radio-frequency Pound-Drever-Hall technique. This scheme reduces the effect of laser amplitude noise and allows for real-time measurements with a dynamic range greater than 50 g. An operation bandwidth of about 1000 Hz is demonstrated with minimum detectable accelerations in the order of 10 μg_rms Hz ^-1/2 for frequencies above 10 Hz, only limited by the interrogating lasers frequency noise.

Original language	English
Article number	094010
Journal	Measurement Science and Technology
Volume	21
Issue number	9
DOIs	https://doi.org/10.1088/0957-0233/21/9/094010
Publication status	Published - Sept 2010

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title = "Optical fiber three-axis accelerometer based on lasers locked to π phase-shifted Bragg gratings",

abstract = "We report on a high-bandwidth, three-axis accelerometer developed with π phase-shifted fiber Bragg gratings. The gratings are inserted into a cantilever system and interrogated by three separate telecom distributed-feedback diode lasers. The lasers are frequency locked to the sensors using a radio-frequency Pound-Drever-Hall technique. This scheme reduces the effect of laser amplitude noise and allows for real-time measurements with a dynamic range greater than 50 g. An operation bandwidth of about 1000 Hz is demonstrated with minimum detectable accelerations in the order of 10 μgrms Hz -1/2 for frequencies above 10 Hz, only limited by the interrogating lasers frequency noise.",

keywords = "Accelerometer, Cantilever, Diode laser, Fiber Bragg grating, Frequency locking, π phase-shifted gratings",

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AU - Lam, Timothy T.Y.

AU - Gagliardi, Gianluca

AU - Salza, Mario

AU - Chow, Jong H.

AU - De Natale, Paolo

PY - 2010/9

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AB - We report on a high-bandwidth, three-axis accelerometer developed with π phase-shifted fiber Bragg gratings. The gratings are inserted into a cantilever system and interrogated by three separate telecom distributed-feedback diode lasers. The lasers are frequency locked to the sensors using a radio-frequency Pound-Drever-Hall technique. This scheme reduces the effect of laser amplitude noise and allows for real-time measurements with a dynamic range greater than 50 g. An operation bandwidth of about 1000 Hz is demonstrated with minimum detectable accelerations in the order of 10 μgrms Hz -1/2 for frequencies above 10 Hz, only limited by the interrogating lasers frequency noise.

KW - Accelerometer

KW - Cantilever

KW - Diode laser

KW - Fiber Bragg grating

KW - Frequency locking

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Optical fiber three-axis accelerometer based on lasers locked to π phase-shifted Bragg gratings

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