Random Raman fiber laser based on a twin-core fiber with FBGs inscribed by femtosecond radiation

Year: 2019

Authors: Skvortsov M.I., Abdullina S.R., Wolf A.A., Dostovalov A.V., Vlasov A.A., Lobach I.A., Wabnitz S., Babin S.A.

Autors Affiliation: Institute of Automation and Electrometry SB RAS, Novosibirsk, Russian Federation; Novosibirsk State University, Novosibirsk, Russian Federation; DIET, Sapienza Università di Roma, via Eudossiana 18, Rome, 00184, Italy; Istituto Nazionale di Ottica del Consiglio Nazionale delle Ricerche (INO-CNR), via Branze 45, Brescia, 25123, Italy

Abstract: Narrowband Raman lasing in a polarization-maintaining two-core fiber (TCF) is demonstrated. Femtosecond point-by-point inscription of fiber Bragg gratings (FBGs) in individual cores produces a half-open cavity with random distributed feedback. The laser linewidth in the cavity with a single FBG inscribed in one core of the TCF reduced by ~2 times with respect to the cavity with a fiber loop mirror. It is shown that the inscription of two FBGs in different cores leads to the formation of a Michelson-type interferometer, leading to the modulation of generation spectra near threshold. This technique offers new possibilities for spectral filtering or multi-wavelength generation.

Journal/Review: OPTICS LETTERS

Volume: 44 (2)      Pages from: 295  to: 298

More Information: Ministry of Education and Science of the Russian Federation (Minobrnauka) (14.Y26.31.0017); Russian Foundation for Basic Research (RFBR) (Russia-Italy 18-52-7822); European Union?s Horizon 2020 Research and Innovation Program under the Marie Sklodowska-Curie grant agreement No 691051.
KeyWords: Fiber Bragg gratings; Fiber lasers; Fibers; Optical fiber communication, Distributed feedback; Femtosecond radiation; Fiber Bragg gratings (FBGs); Fiber loop mirrors; Michelson-type interferometers; Polarization maintaining; Raman fiber lasers; Spectral filtering, Laser mirrors
DOI: 10.1364/OL.44.000295

Citations: 20
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