Optical and Luminescence Properties of YAlO3 -Tm Crystals

Abstract

The results on optical absorption, photoluminescence and thermoluminescence of YAP‐Tm crystals of 1 at.% and 4 at.% of Tm are presented as well as influence of UV‐, γ‐radiation and thermal treatments on optical and luminescence properties of the crystals. The blue‐green luminescence of defect centers was observed in YAP‐Tm crystals at Ar+‐laser excitation. The possibility of energy transfer processes between defect centers and Tm3+ ions was shown.

Growth and properties of 20at% Yb3+-doped YALO3 single crystal

“…impurities in 20 at%-doped Yb:YAP crystal. According to the energy-level configurations and their emission features of Tm 3+ , Er 3+ , and Ho 3+ ions in the YAP crystal [14][15][16][17][18], the luminescence at 475 nm shown in Fig. 5 probably originates from the transition 1 G 4 -3 H 6 of Tm 3+ ions, the emission band peaked at 550 nm may be assigned to the transition 5 S 2 -5 I 8 of Ho 3+ ions and the transition 4 S 3/2 -4 I 15/2 of Er 3+ ions, and the transition 1 G 4 -3 H 4 of Tm 3+ ions and the transition 5 F 5 -5 I 8 of Ho 3+ ions may be responsible for the up-conversion luminescence centered at around 660 nm in Fig.…”

Anisotropy of thermal and spectral characteristics in Tm:YAP laser crystals

“…Therefore, Tm:YAP crystals have gained significant interest in the last several years [5][6][7][8][9][10][11][12]. To our knowledge, most of the research results are focused on the crystal growth [5], unpolarized spectra under different annealing conditions [6] and laser output properties [7][8][9][10][11][12]. However, the anisotropy of Tm:YAP has been rarely reported, compared to that of Nd:YAP crystals [13][14][15].…”

Growth and optical properties of Tm:YAlO3 single crystals with different Tm concentrations

“…However, with the rapid development of diode-pumped solidstate lasers in the last several years, Tm 3+ doped crystals have become of particular interest as a kind of laser materials for 2 m laser [7][8][9][10][11][12][13][14]. Because 2 m light wave is strongly absorbed by water molecule, 2 m waveband laser is particularly promising for both military and civil application such as laser radar, medicine and remote sensing.…”