Title :
Evaluation of upconversion losses in Nd3+-doped materials by thermal lens
Author :
Jacinto, C. ; Andrade, A.A. ; Oliveira, S.L. ; Catunda, T.
Author_Institution :
Inst. de Fisica de Sao Carlos, Sao Paulo Univ., Brazil
Abstract :
Recently, it was demonstrated that the thermal lens (TL) technique could be used for upconversion parameter (γ) determination. It was observed in Cr3+-doped fluoride crystals (LiSrAlF6 and LiSrGaF6) (in non-lasing conditions), that the extra heat generated by ETU leads to a strong TL effect which increases nonlinearly with pump laser power. The aim of this work is the determination of γ and its effect on η of Nd-doped materials using the TL spectrometry. The study was performed in three sets of glasses (phosphate (Q-98), fluoroindate (PGIZCa), and fluorozirconate (ZBLAN)) with four different Nd concentrations, and one Nd:YLF crystal.
Keywords :
chromium; fluorine compounds; neodymium; optical glass; optical materials; photoluminescence; thermal lensing; Cr3+-doped fluoride crystals; LiSrAlF:Cr3+; LiSrGaF:Cr3+; LiYF4:Nd; Nd3+-doped materials; YLF:Nd3+; ZBLAN; ZrF4-BaF2-LaF3-AlF3-NaF; fluoroindate; fluorozirconate; glasses; heat generation; laser power; phosphate; thermal lens spectrometry; thermal lens technique; upconversion losses; upconversion parameter; Chromium; Crystals; Heat pumps; Laser excitation; Lenses; Neodymium; Power generation; Power lasers; Pump lasers; Thermal lensing;
Conference_Titel :
Lasers and Electro-Optics Europe, 2005. CLEO/Europe. 2005 Conference on
Print_ISBN :
0-7803-8974-3
DOI :
10.1109/CLEOE.2005.1567871
