Spectral and luminescent properties of forsterite single crystals heavily doped with chromium: II. Luminescence

Journal Article · Mon Mar 31 00:00:00 EST 2003 · Quantum Electronics (Woodbury, N.Y.)

DOI:https://doi.org/10.1070/QE2003V033N03ABEH002386· OSTI ID:21470287

Lebedev, V F; Tenyakov, S Yu; Dianov, Evgenii M ^[1]; Gaister, A V; Zharikov, Evgeny V ^[2]

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1. Fiber Optics Research Center, Russian Academy of Sciences, Moscow (Russian Federation)
2. Laser Materials and Technology Research Center, A. M. Prokhorov General Physics Institute, Russian Academy of Sciences, Moscow (Russian Federation)

The polarised luminescence spectra of forsterite single crystals grown from a melt containing from 0.015 to 0.97 wt% of chromium are studied. Most of the crystals were grown by the Czochralski method under standard oxidation conditions (1.4-2.4 vol% of oxygen). Some crystals were grown in the atmosphere with a higher content of oxygen ({approx}12 vol%) or in the neutral atmosphere (100% of Ar). The luminescence of Cr{sup 4+} ions excited to the {sup 3}T{sub 2} level at 980 nm and to the {sup 3}T{sub 1} level at 632.8 nm exhibited no quenching over the entire range of crystal doping. In crystals absorbing above 70% of laser energy, the self-absorption of luminescence of Cr{sup 4+} ions was observed. The reabsorption of luminescence of Cr{sup 3+}(2) ions located in sites of the forsterite crystal with the mirror symmetry occurs stronger because of a greater overlap of the luminescence band of Cr{sup 3+}(2) ions with the absorption bands of Cr{sup 4+} ions. The luminescence of Cr{sup 4+} ions is found to be polarised predominantly along the b axis for any polarisation of exciting radiation. The broadband luminescence of Cr{sup 3+}(2) ions is polarised predominantly along the c axis for all the crystals studied, irrespective of the polarisation of exciting radiation and the oxygen concentration in the crystal-growth atmosphere. The luminescence of Cr{sup 3+}(2) ions polarised along the c, b, and a axes has maxima at {approx}900, 860, and 850 nm, respectively. (active media)

• OSTI ID: 21470287
• Journal Information: Quantum Electronics (Woodbury, N.Y.), Vol. 33, Issue 3; Other Information: DOI: 10.1070/QE2003v033n03ABEH002386; ISSN 1063-7818
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CHROMIUM
CHROMIUM IONS
CONTROLLED ATMOSPHERES
CRYSTAL DOPING
CRYSTAL GROWTH
CZOCHRALSKI METHOD
DOPED MATERIALS
LASERS
LUMINESCENCE
MINERALS
MIRRORS
MONOCRYSTALS
OXIDATION
OXYGEN
POLARIZATION
QUENCHING
SELF-ABSORPTION
SPECTRA
SYMMETRY
ABSORPTION
ATMOSPHERES
CHARGED PARTICLES
CHEMICAL REACTIONS
CRYSTAL GROWTH METHODS
CRYSTALS
ELEMENTS
EMISSION
IONS
MATERIALS
METALS
NONMETALS
PHOTON EMISSION
SORPTION
TRANSITION ELEMENTS