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Crystalline GaSb-core optical fibers with room-temperature photoluminescence

DOI: 10.1364/OME.8.001435 DOI Help

Authors: S. Song (Norwegian University of Science and Technology) , N. Healy (Newcastle University) , S. K. Svendsen (Norwegian University of Science and Technology) , U. L. Österberg (Norwegian University of Science and Technology) , A. V. Cuervo Covian (Dartmouth College) , J. Liu (Dartmouth College) , A. C. Peacock (University of Southampton) , J. Ballato (Clemson University) , F. Laurell (KTH Royal Institute of Technology) , M. Fokine (KTH Royal Institute of Technology) , U. J. Gibson (Norwegian University of Science and Technology; KTH Royal Institute of Technology)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Optical Materials Express , VOL 8

State: Published (Approved)
Published: May 2018
Diamond Proposal Number(s): 13025

Open Access Open Access

Abstract: Glass-clad, GaSb-core fibers were drawn and subsequently laser annealed. The as-drawn fibers were found to be polycrystalline, possess Sb inclusions, and have oxide contamination concentrations of less than 3 at%. Melting and resolidifying regions in the cores using 10.6 µm CO2 laser radiation yielded single crystalline zones with enhanced photoluminescence (PL), including the first observation of strong room temperature PL from a crystalline core fiber. Annealed fibers show low values of tensile strain and a bandgap close to that of bulk GaSb.

Subject Areas: Materials


Instruments: I18-Microfocus Spectroscopy

Documents:
ome-8-6-1435.pdf