Abstract
The 2 μm emission spectra and lifetimes of Ho3+ ions in germanate glasses with different doping concentrations were investigated. The Judd-Ofelt parameters, radiative transition rates, and emission cross-section of Ho3+ were calculated based on the absorption and emission spectra. The energy transfer rate to hydroxyl groups and non-radiative rate of 5I7 level were calculated by fitting the variations of lifetimes vs. the doping concentrations. Besides, the unclad fibers with highly Ho3+ doped (6 × 1020 cm−3) were fabricated and pumped using a homemade 1.94 μm fiber laser, and the peak of emission spectra showed a redshift with the increasing fiber length.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: 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.