Abstract
We report, for the first time, a broadband upconversion emission (800–1000 nm) in Bi-doped germano-silicate glass optical fibers with excitation in the range of 1515–1585 nm, which can explain the low laser efficiency at wavelengths longer than 1500 nm. The mechanism responsible for the emission is two-step upconversion process. The origin of this upconversion luminescence is discussed and new energy transition schemes are proposed. • We fabricated bismuth-doped germane-silicate glass optical fibers. • New upconversion emission band was observed by pumping around 1.5 μm. • Both emissions at 837 and 945 nm depend quadratically on the incident power. • Two-step upconversion process and new energy transition scheme was proposed.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
