Holographic reflection filters in photorefractive LiNbO3 channel waveguides

DC FieldValueLanguage
dc.contributor.authorKip, D
dc.contributor.authorHukriede, J
dc.date.accessioned2021-12-23T16:05:06Z-
dc.date.available2021-12-23T16:05:06Z-
dc.date.issued2002
dc.identifier.issn03034216
dc.identifier.urihttps://osnascholar.ub.uni-osnabrueck.de/handle/unios/6788-
dc.description.abstractPermanent refractive-index gratings in waveguide devices are of considerable interest for optical communication systems that make use of the high spectral selectivity of holographic filters, e.g. dense wavelength division multiplexing (DWDM) or narrow-bandwidth mirrors for integrated waveguide lasers in LiNbO3. Other possible applications include grating couplers and optical sensors. In this contribution we investigate such holographic wavelength filters in Fe- and Cu-doped LiNbO3 channel waveguides. Permanent refractive- index gratings are generated by thermal fixing of holograms in the waveguides. The samples are fabricated by successive in-diffusion of Ti stripes and thin layers of either Fe or Cu. After high temperature recording with green light, refractive- index changes up to Delta n approximate to 10(-4) for infrared light (1.55 mum) are obtained, resulting in a reflection efficiency well above 99% for a 15 mm-long grating. Several gratings for different wavelengths can be superimposed in the same sample, which may enable the fabrication of more complex filters, laser mirrors or optical sensors. By changing the sample temperature the reflection wavelength can be tuned by thermal expansion of the grating, and wavelength filters can be switched on and off by applying moderate voltages using the electro-optic effect. Furthermore, we report on a new thermal fixing mechanism that does not need any additional development by homogeneous light illumination and therefore does not suffer from the non-vanishing dark conductivity of the material.
dc.language.isoen
dc.publisherSPRINGER-VERLAG BERLIN
dc.relation.ispartofINFRARED HOLOGRAPHY FOR OPTICAL COMMUNICATIONS
dc.relation.ispartofTOPICS IN APPLIED PHYSICS
dc.subjectCOPPER DIFFUSION
dc.subjectINFRARED LIGHT
dc.subjectIRON
dc.subjectLITHIUM-NIOBATE CRYSTALS
dc.subjectORIGIN
dc.subjectPhysics
dc.subjectPhysics, Applied
dc.subjectSTORAGE
dc.subjectWAVE-GUIDES
dc.titleHolographic reflection filters in photorefractive LiNbO3 channel waveguides
dc.typereview
dc.identifier.isiISI:000181256700007
dc.description.volume86
dc.description.startpage111
dc.description.endpage128
dc.contributor.orcid0000-0001-7923-0113
dc.contributor.researcheridC-7021-2013
dc.publisher.placeHEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY
Show simple item record

Page view(s)

3
Last Week
0
Last month
0
checked on Apr 13, 2024

Google ScholarTM

Check