Holographic recording in planar Cu : H : LiTaO3 waveguides

Autor(en): Kostritskii, SM
Kip, D
Stichwörter: LITAO3; LITHIUM TANTALATE; Materials Science; Materials Science, Multidisciplinary; Physics; Physics, Applied; Physics, Condensed Matter; PROTON; WAVE-GUIDES
Erscheinungsdatum: 1998
Herausgeber: WILEY-V C H VERLAG GMBH
Journal: PHYSICA STATUS SOLIDI A-APPLIED RESEARCH
Volumen: 169
Ausgabe: 1
Startseite: 171
Seitenende: 180
Zusammenfassung: 
Photorefractive planar waveguides in LiTaO3 are fabricated by a proton exchange and a successive copper exchange from melts, containing either Cu+ or Cu2+ ions. The influence of different fabrication steps on refractive index profiles, hydrogen content, optical absorption, and waveguide transparency is investigated. With holographic methods dark and photoconductivity, holographic sensitivity, and light-induced refractive index change are measured. By the additional copper exchange the steady-state diffraction efficiency of holographic gratings in the waveguides is increased from 0.005 to 81%. Here the crucial influence of both, Cu valence state and hydrogen concentration on the holographic sensitivity is demonstrated.
ISSN: 00318965
DOI: 10.1002/(SICI)1521-396X(199809)169:1<171::AID-PSSA171>3.3.CO;2-L

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