Title :
Infrared-to-visible upconversion in singlemode and multimode fluoride glass (ZBLAN) optical fibers doped with erbium
Author_Institution :
Quantum Electron. Lab., A. Mickiewicz Univ., Poznan, Poland
Abstract :
Singlemode and multimode fluoride glass (ZBLAN) erbium doped fibers of Verre et Fluore (France) have been excited by CW diode laser of SDL (U5A); at the wavelengths of 800 and 970 nm. Fluorescence spectrum in the visible due to infrared-to-visible upconversion was determined, and the lifetime of the main 4S3/2 level, responsible for the strongest 4S3/2→ 4I15/2 transition in the green was measured. Upconversion is, in general, a result of several processes: ground state absorption (G5A), excited state absorption (E5A), cooperative ion-pair interaction (energy transfer mechanism) and avalanche. All these processes are discussed on the basis of the results observed during infrared excitation of the fiber. The core diameter of the fiber was in the range of a few micrometers, and its length-2 to 3 meters
Keywords :
barium compounds; erbium; fluorescence; impurity absorption spectra; lanthanum compounds; optical fibre testing; sodium compounds; zirconium compounds; 800 nm; 970 nm; 4S3/2 level; 4S3/2→4I15/2 transition; CW diode laser; Er-doped multimode fluoride glass ZBLAN optical fibers; Er-doped singlemode fluoride glass ZBLAN optical fibers; ZBLAN:Er; ZrF4-BaF2-LaF3-AlF3-NaF:Er; cooperative ion-pair interaction; energy transfer mechanism; excited state absorption; fluorescence spectrum; ground state absorption; infrared excitation; infrared-to-visible upconversion; Diode lasers; Doped fiber amplifiers; Electromagnetic wave absorption; Energy exchange; Erbium; Fluorescence; Glass; Laser excitation; Optical fibers; Stationary state;
Conference_Titel :
Transparent Optical Networks, 1999. International Conference on
Conference_Location :
Kielce
Print_ISBN :
0-7803-5637-3
DOI :
10.1109/ICTON.1999.781848
