Title :
Spectral characteristics of Yb3+ in calcium lithium niobium gallium garnets
Author :
Lupei, V. ; Lupei, A. ; Gheorghe, L. ; Gheorghe, C. ; Achim, A.
Author_Institution :
SSQE Lab., Nat. Inst. of Laser, Plasma & Radiat. Phys., Bucharest, Romania
Abstract :
This paper presents spectral characterization of Yb3+ in CLNGG crystals grown by Chochralski method in platinum crucibles with effective Yb concentration up to 4.3 at. %. The room temperature absorption consists of an intense 2F7/2(1) rarr 2F5/2(1) band centered around 972 nm and a group of unresolved lines corresponding to the other electronic transitions or to vibronics extending from about 910 to 960 nm. Absorption at 10 K reveals in the 2F7/2 (1) rarr 2F5/2(1) band a complex structure of at least five Gaussian lines, with an intense and broad (FWHM ~ 1.2 nm) component peaking at ~ 971.7 nm; another intense peak being at ~973 nm. This structure is independent on Yb content up to 4.3at. %.
Keywords :
calcium compounds; crystal growth from solution; garnets; infrared spectra; lithium compounds; niobium compounds; optical materials; vibronic states; ytterbium; 2F7/2 (1) rarr 2F5/2(1) band; 2F7/2(1) rarr 2F5/2(1) band; CLNGG crystals; CaLiNbGaO:Yb; Chochralski method; Gaussian lines; calcium lithium niobium gallium garnets; room temperature absorption; vibronics; wavelength 910 nm to 960 nm; wavelength 972 nm; Absorption; Calcium; Crystals; Garnets; Laser fusion; Niobium; Optical materials; Optical pulse generation; Optimized production technology; Spectroscopy;
Conference_Titel :
Lasers and Electro-Optics 2009 and the European Quantum Electronics Conference. CLEO Europe - EQEC 2009. European Conference on
Conference_Location :
Munich
Print_ISBN :
978-1-4244-4079-5
Electronic_ISBN :
978-1-4244-4080-1
DOI :
10.1109/CLEOE-EQEC.2009.5194780
