LIGHT-INDUCED ABSORPTION CHANGES IN IRON-DOPED LINBO3

Autor(en): SIMON, M
JERMANN, F
KRATZIG, E
Stichwörter: CHARGE-TRANSPORT; DEFECTS; INTENSITY; LITHIUM-NIOBATE; Materials Science; Materials Science, Multidisciplinary; Optics; PHOTOCONDUCTIVITY; PULSES; PURE
Erscheinungsdatum: 1994
Herausgeber: ELSEVIER SCIENCE BV
Journal: OPTICAL MATERIALS
Volumen: 3
Ausgabe: 4
Startseite: 243
Seitenende: 250
Zusammenfassung: 
LiNbO3:Fe and LiNbO3:Fe,Me (Me = K, Mg, Zn) crystals are illuminated with frequency-doubled pulses of a e-switched Nd:YAG laser. We detect light-induced absorption changes at high pulse intensities (I > 10(9)Wm(-2)) utilizing cw probe lasers of different wavelengths (lambda(p) = 488, 633, and 785 nm). Intensity dependences as well as relaxation processes after illumination are investigated. Absorption changes increase with increasing light intensity. Strongest effects are observed in reduced crystals. Doping with magnesium or zinc and an increasing lithium content, respectively, diminishes light-induced absorption changes. Our results can be described by a two-center charge transport model.
ISSN: 09253467
DOI: 10.1016/0925-3467(94)90036-1

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