TY - GEN

T1 - Generation of narrow modes within incoherent radiation of random distributed feedback fiber laser

AU - Churkin, D. V.

AU - Sugavanam, S.

AU - Vatnik, I. D.

N1 - Funding Information: This work was supported by Russian Science Foundation (19-12-00318). Publisher Copyright: © COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.

PY - 2020

Y1 - 2020

N2 - Random distributed feedback fibre lasers are well known type of fiber lasers where the optical feedback is organized via amplified Rayleigh scattering on random in space sub-micron refractive index inhomogenities1. Random distributed feedback fiber lasers found their applications in telecommunications and distributed sensing systems, as well as attracted considerable amount of interest from researches2. It is well-known that the generation spectrum of random distributed feedback fiber laser is a wide spectrum of typical width of 1 nm. It can be specifically tailored to demonstrate multiwavelength, tunable operation etc. However, the main features of the generation spectrum should be defined by the nature of the feedback itself. Usually the smooth bell-shaped spectrum is attributed to the incoherent nature of the feedback3. It is well known however that the Rayleigh scattering is an elastic scattering and should be resulted in the coherent feedback, which in turn leads to narrow features in the generation spectrum. Recently, narrow modes have been observed in the generation of the random distributed feedback fiber laser by means of scanning Fabry-Perot interferometer4. The spectral width of modes was about tens of picometers and was limited by the spectral resolution of the scanning interferometer. Those modes were attributed to the stimulated Brillouin scattering.

AB - Random distributed feedback fibre lasers are well known type of fiber lasers where the optical feedback is organized via amplified Rayleigh scattering on random in space sub-micron refractive index inhomogenities1. Random distributed feedback fiber lasers found their applications in telecommunications and distributed sensing systems, as well as attracted considerable amount of interest from researches2. It is well-known that the generation spectrum of random distributed feedback fiber laser is a wide spectrum of typical width of 1 nm. It can be specifically tailored to demonstrate multiwavelength, tunable operation etc. However, the main features of the generation spectrum should be defined by the nature of the feedback itself. Usually the smooth bell-shaped spectrum is attributed to the incoherent nature of the feedback3. It is well known however that the Rayleigh scattering is an elastic scattering and should be resulted in the coherent feedback, which in turn leads to narrow features in the generation spectrum. Recently, narrow modes have been observed in the generation of the random distributed feedback fiber laser by means of scanning Fabry-Perot interferometer4. The spectral width of modes was about tens of picometers and was limited by the spectral resolution of the scanning interferometer. Those modes were attributed to the stimulated Brillouin scattering.

KW - fiber lasers

KW - Random lasers

KW - real-time measurements

UR - http://www.scopus.com/inward/record.url?scp=85098068312&partnerID=8YFLogxK

U2 - 10.1117/12.2555718

DO - 10.1117/12.2555718

M3 - Conference contribution

AN - SCOPUS:85098068312

T3 - Proceedings of SPIE - The International Society for Optical Engineering

BT - Fiber Lasers and Glass Photonics

A2 - Ferrari, Maurizio

A2 - Mackenzie, Jacob I.

A2 - Taccheo, Stefano

PB - SPIE

T2 - Fiber Lasers and Glass Photonics: Materials through Applications II 2020

Y2 - 6 April 2020 through 10 April 2020

ER -