Abstract
The upconversion of infrared radiation into green and red luminescence has been studied for Er 3+ and Yb 3+ ions in fluorohafnate glasses. At room temperature normalized upconversion efficiency of 8.4x10 -4 cm 2/W has been obtained for the green emission (545 nm) of Er 3+ in doped samples containing 4.5 mol% (Yb 3+) and 0.75 mol% (Er 3+) pumped by 974 nm light with an absorbed intensity of 2.5 mW/cm 2. Both green and red upconversion radiations slightly decrease with increasing temperature. Room-temperature measured efficiency is compared with the calculated one obtained from the rate equation model of Wright.
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.
