INTRINSIC PHOTOREFRACTIVE CENTERS IN LINBO3-FE

Autor(en): SIMON, M
JERMANN, F
KRATZIG, E
Stichwörter: ABSORPTION; DOPED LINBO3; ELECTROOPTIC CRYSTALS; GROWTH; HOLOGRAPHIC STORAGE; INDUCED CHARGE-TRANSPORT; INTENSITY LASER-PULSES; LITHIUM-NIOBATE; Optics; PHOTOCONDUCTIVITY; Physics; Physics, Applied; WAVE-GUIDES
Erscheinungsdatum: 1995
Herausgeber: SPRINGER VERLAG
Journal: APPLIED PHYSICS B-LASERS AND OPTICS
Volumen: 61
Ausgabe: 1
Startseite: 89
Seitenende: 93
Zusammenfassung: 
In LiNbO3:Fe,Me crystals (Me = K,Mg,Zn) elementary holograms are recorded and erased with frequency-doubled, ordinarily polarized pulses of a Q-switched Nd:YAG laser. At high light intensities (I > 10(9) Wm(-2)) holographic sensitivities and saturation values of refractive index changes grow with increasing intensity and a contribution to photoconductivity appears increasing quadratically with I. The intensity-dependent parts of the holographic quantities are diminished by increasing the lithium content of the samples or by doping the crystals with magnesium or zinc. Experimental results can be described by a two-center charge transport model, which is the Fe-2+/3+ model supplemented by shallow traps, namely niobium ions occupying lithium sites.
ISSN: 09462171
DOI: 10.1007/BF01090977

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