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: The authors are grateful for the use of equipment from the multiple-access center “High-resolution spectroscopy of gases and condensed matters” at IAE SB RAS, the provision of the twin-core fiber samples by S. L. Semjonov and V. V. Velmiskin, and the technical support by E. A. Evmenova and S. I. Kablukov. This work was also supported by the European Union’s Horizon 2020 Research and Innovation Program under the Marie Sklodowska-Curiegrant 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: 18
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