Investigation of titanium- and copper-indiffused channel waveguides in lithium niobate and their application as holographic filters for infrared light
Publication date
2000
Document type
Research article
Author
Organisational unit
Universität Osnabrück
Scopus ID
ISSN
Series or journal
Journal of Optics A: Pure and Applied Optics
Periodical volume
2
Periodical issue
5
First page
481
Last page
487
Part of the university bibliography
Nein
Abstract
Monomode channel waveguides for infrared light around 1550 nm are fabricated in lithium niobate by successive indiffusion of titanium stripes and thin evaporated layers of copper. The fabricated waveguides are optically characterized and investigated with an atomic force microscope. To evaluate the photorefractive properties holograms are recorded with green light of an argon ion laser and read in the various channels in reflection geometry with infrared light. The saturation values of the light-induced refractive-index change and the photoconductivity in the channels are measured. The results are consistent with a one-centre model for the charge transport. To demonstrate the multiplexing capabilities of the photorefractive waveguides three reflection holograms with 90% diffraction efficiency and a channel spacing of only 0.8 nm are superimposed in one sample.
Version
Not applicable (or unknown)
Access right on openHSU
Metadata only access