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Proceedings Paper

Enhanced performance low-noise Brillouin ring laser for Brillouin sensing
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Paper Abstract

In this work, we present an enhanced design for a Brillouin Ring Laser (BRL) based on a doubly-resonant cavity (DRC) with short fiber length, paired with a heterodyne-based wavelength-locking system, to be employed as pump-probe source in Brillouin sensing applications. The enhanced source is compared with the long-cavity (LC) (~ 2 km) BRL pump-probe source that we have recently demonstrated, showing a significantly lower relative intensity noise (~-145 dB/Hz in the whole 0-800 MHz range), a narrower linewidth (10 kHz), combined with large tunability features and an excellent pumpprobe frequency stability (~200 Hz) which is uncommon for fiber lasers. The measurement of intensity noise on the novel BRL signal yielded an improved signal-to-noise ratio (SNR) of about 22 dB with respect to LC-BRL schemes that is expected to lead to a temperature/strain resolution enhancement in BOTDA applications up to 5.5 dB.

Paper Details

Date Published: 16 September 2019
PDF: 4 pages
Proc. SPIE 11199, Seventh European Workshop on Optical Fibre Sensors, 111993I (16 September 2019); doi: 10.1117/12.2539987
Show Author Affiliations
Diego Marini, Instituto per la Microelettronica e Microsistemi (Italy)
Leonardo Rossi, Instituto per la Microelettronica e Microsistemi (Italy)
Univ. Bologna (Italy)
Filippo Bastianini, Sestosensor s.r.l (Italy)
Gabriele Bolognini, Instituto per la Microelettronica e Microsistemi (Italy)

Published in SPIE Proceedings Vol. 11199:
Seventh European Workshop on Optical Fibre Sensors
Kyriacos Kalli; Sinead O. O'Keeffe; Gilberto Brambilla, Editor(s)

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