Spectroscopy and energy transfer parameters of Tm3+- and Ho3+-doped Ba2NaNb5O15 single crystals

✍ Scribed by S. Bigotta; A. Toncelli; M. Tonelli; E. Cavalli; E. Bovero

• Publisher: Elsevier Science
• Year: 2007
• Tongue: English
• Weight: 288 KB
• Volume: 30
• Category: Article
• ISSN: 0925-3467
• DOI: 10.1016/j.optmat.2006.11.040

✦ Synopsis

The absorption and emission spectra of Tm 3+ -and Ho 3+ -doped Ba 2 NaNb 5 O 15 crystals have been measured in the 1.5-2 lm region. The lifetimes of the lowest excited states have been measured at 10 and at 298 K. The cross sections of the (Tm) 3 F 4 M 3 H 6 and (Ho) 5 I 7 M 5 I 8 transitions have been estimated and used to determine the (Tm) 3 F 4 ! (Ho) 5 I 7 energy transfer parameter. These results are discussed in order to evaluate the potentialities of this material as active medium in solid-state lasers operating at 2 lm.