Open-Cavity Spun Fiber Raman Lasers with Dual Polarization Output
Authors: Nuño J., Rizzelli G., Gallazzi F., Prieto F., Pulido C., Corredera P., Wabnitz S., Ania-Castanon J.D.
Autors Affiliation: Instituto de Óptica\’ Daza de Valdes\’, IO-CSIC, Madrid, 28006, Spain; Saint Louis University – Madrid Campus, Madrid, 28003, Spain; Instituto de Estructura de la Materia, IEM-CSIC, Madrid, 28006, Spain; INO-CNR, Università Degli Studi di Brescia, Dipartimento di Ingegneria Dell\’ Informazione, Brescia, 25123, Italy; Novosibirsk State University, 1 Pirogova str, Novosibirsk, 630090, Russian Federation; Departamento de Electrónica, Universidad de Alcalà, Escuela Politécnica Superior, Madrid, 28871, Spain
Abstract: Random distributed feedback fiber Raman lasers, where the feedback mechanism is provided by Rayleigh backscattering, have attracted a good deal of attention since they were first introduced in 2010. Their simple and flexible design, combined with good lasing efficiency and beam quality properties, comparable to those of standard cavity lasers, have led to multiple applications, particularly in the fields of fiber sensing and optical communications. In spite of these advances, the polarization properties of random fiber Raman lasers, which can strongly affect their performance in both sensing and communications, have barely been explored so far. In this article we experimentally and theoretically study the polarization properties of different open-cavity laser designs, based on either standard transmission fibers or low polarization-mode-dispersion spun fibers. By using high-power, highly-polarized pumps, we demonstrate controllable polarization-pulling and simultaneous lasing at close wavelengths with different output polarization properties in random distributed feedback fiber Raman lasers. These results advance our understanding of the polarization dynamics in ultralong lasers, and pave the way to the design of novel fiber laser sources capable of polarization-sensitive sensing and distributed amplification.
Journal/Review: SCIENTIFIC REPORTS
Volume: 7 (1) Pages from: 13681 to: 13681
More Information: This work was funded by FP7 ITN programme ICONE (608099); Spanish MINECO grant TEC2015-71127-C2; Comunidad de Madrid grant SINFOTON (S2013/MIT-2790-SINFOTON-CM); Ministero dell “Istruzione, dell” UniversitÃ e della Ricerca (MIUR) (PRIN 2015KEZNYM); The work of SW was supported by the Ministry of Education and Science of the Russian Federation (14.Y26.31.0017). The work of JN was supported by the Spanish MINECO (“Juan de la Cierva” contract).KeyWords: Generation; GainDOI: 10.1038/s41598-017-13193-7