Open AccessRandom lasing from optical fibers with phase separated glass cores
Author(s) -
Srinath Jagannathan,
L. Ackerman,
W. Chen,
Nanjie Yu,
Maxime Cavillon,
Matthew Tuggle,
Thomas Hawkins,
John Ballato,
Peter D. Dragic
Publication year - 2020
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.396109
Subject(s) - materials science , optics , lasing threshold , fiber laser , cladding (metalworking) , photonic crystal fiber , optical fiber , dispersion shifted fiber , double clad fiber , rayleigh scattering , polarization maintaining optical fiber , laser , brillouin scattering , graded index fiber , hard clad silica optical fiber , core (optical fiber) , random laser , optoelectronics , fiber optic sensor , physics , metallurgy
A novel random laser, integrating a passive optical fiber with a phase separated aluminosilicate core-silica cladding as the feedback medium, is proposed and presented. The core exhibits greatly enhanced Rayleigh scattering, therefore requiring a significantly reduced length of scattering fiber (4 m) for lasing. With a Yb-doped fiber as the gain medium, the fiber laser operates at 1050 nm with low threshold power and possesses an output that can be amplified through conventional means. Furthermore, the laser was found to have a high degree of spatial coherence, spectral broadening with increasing input power, and temporal spectral variation. The facile setup and results herein pave the way for further study and applications based on low threshold random fiber lasers.