Spectroscopic and luminescent properties of Yb,Er:LaSc3(BO3)4 crystals
| Autor: | M.G. Brik, V. F. Pisarenko, N.V. Selina, V.A. Lebedev, A.A. Perfilin |
|---|---|
| Rok vydání: | 2000 |
| Předmět: |
Laser diode
Chemistry Organic Chemistry Kinetics Analytical chemistry Luminescence spectra Radiation Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials law.invention Inorganic Chemistry Wavelength law Activator (phosphor) Quantum efficiency Electrical and Electronic Engineering Physical and Theoretical Chemistry Luminescence Spectroscopy |
| Zdroj: | Optical Materials. 14:121-126 |
| ISSN: | 0925-3467 |
| Popis: | Absorption and luminescence spectra and luminescence kinetics of Yb have been measured in crystals of Yb,Er:LaSc3(BO3)4 (LSB) for a wide region of variation of activator concentration. It has been established that an effective absorption cross-section of Yb3+ at the maximum of 982 nm is equal to 1.16 × 10−20 cm2. Effective absorption and emission cross-sections of Er3+ at generation wavelength of 1555 nm are equal to σ ab =4.4×10 −21 and σ em =5.2×10 −21 cm −2 , respectively. 2 F 5/2 Yb 3+ → 4 I 11/2 Er 3+ energy transfer for dominating luminescence centers in Yb,Er:LSB is described satisfactorily by a dipole–dipole interaction with C DA =4.16×10 −39 cm −6 . Yb–Yb energy migration is very efficient and described by a hopping mechanism with C DD =3.5×10 −38 cm −6 , the quantum efficiency in Yb0.15 (6.7 × 1020 cm−3), Er0.015 (6.7 × 1019 cm−3):LSB crystals has achieved 98%. Investigations of Yb,Er:LSB crystals have shown them to have necessary combination of properties to get an effective generation of 1.5 μm eye-safe radiation with laser diode pumping. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect