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Intracavity interrogation of an array of fiber Bragg gratings
RISE Research Institutes of Sweden, Digitala system, Smart hårdvara. KTH Royal Institute of Techology, Sweden.ORCID-id: 0000-0001-8058-2140
KTH Royal Institute of Techology, Sweden.
KTH Royal Institute of Techology, Sweden.
Proximion AB, Sweden.
2021 (engelsk)Inngår i: Optics Express, E-ISSN 1094-4087, Vol. 29, nr 1, s. 111-118Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

In this work, we explore the interrogation of an array of fiber Bragg gratings as part of a laser cavity. A semiconductor optical amplifier in a sigma-shaped fiber cavity provides gain and is gated periodically at a rate that matches the roundtrip time associated with each grating of the array. The interrogator exhibits clear laser properties such as a threshold and linewidth narrowing. Besides improving the signal-to-noise ratio and enabling the re-use of wavelengths, it is found that this interrogation scheme enables monitoring of weak gratings spaced by less than 1 cm. Intracavity grating interrogation studied here is found to be a simple and powerful way to increase the number of sensor points for industrial applications. 

sted, utgiver, år, opplag, sider
OSA - The Optical Society , 2021. Vol. 29, nr 1, s. 111-118
Emneord [en]
Fiber Bragg gratings, Semiconductor optical amplifiers, Signal to noise ratio, Intracavities, Laser property, Linewidth narrowing, Round-trip time, Shaped fibers, Fiber amplifiers
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Identifikatorer
URN: urn:nbn:se:ri:diva-51929DOI: 10.1364/OE.414094Scopus ID: 2-s2.0-85099077274OAI: oai:DiVA.org:ri-51929DiVA, id: diva2:1520200
Merknad

Funding details: Knut och Alice Wallenbergs Stiftelse, 2019-02526; Funding text 1: Vetenskapsr?det (2015-04346); Knut och Alice Wallenbergs Stiftelse; Process Industrial IT and Automation (2019-02526).

Tilgjengelig fra: 2021-01-20 Laget: 2021-01-20 Sist oppdatert: 2022-09-15bibliografisk kontrollert

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