Photorefractive charge compensation in α-phase proton-exchanged LiNbO_3 waveguides

Méndez, Alfredo; Garcı́a-Cabañes, A.; Carrascosa, M.; Cabrera, Jesús Hernández

doi:10.1364/josab.17.001412

Cited by 20 publications

(4 citation statements)

References 26 publications

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“…Recording/erasing kinetics have been measured as a function of the temperature and the surrounding atmosphere. A first important result is that, after heating the sample above 130°C in a vacuum, the dark developing and related effects reported in reference [4] practically disappear and they do not apparently re-appear after shelve storage of the sample for several months. This behaviour is tentatively attributed to surface charges diffused from the surface during the heating either out or in the waveguide layer.…”

Section: Resultsmentioning

confidence: 86%

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Conductivity phenomena affecting fixed filters in photorefractive PE:LiNbO3 waveguides

Paliza¹,

Caballero‐Calero²,

Garcı́a-Cabañes³

et al. 2003

SPIE Proceedings

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Section: Resultsmentioning

confidence: 86%

“…More experimental details are given in Ref. [4]. Recording/erasing kinetics have been measured as a function of the temperature and the surrounding atmosphere.…”

Section: Resultsmentioning

confidence: 99%

Conductivity phenomena affecting fixed filters in photorefractive PE:LiNbO3 waveguides

Paliza¹,

Caballero‐Calero²,

Garcı́a-Cabañes³

et al. 2003

SPIE Proceedings

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“…In fact, our group has already made preliminary reports on the optical damage behaviour of phases α, β 1 and reverse proton exchanged (RPE) 13,14 . Two more papers have been published on the related subjects of recording and fixing photorefractive gratings 30 and on photovoltaic currents 31 and their dependence on the light intensity in pure α-phase guides.…”

Section: Introductionmentioning

confidence: 99%

Comparative study of optical damage and photovoltaic currents in planar LiNbO 3 waveguides

et al. 2005

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The optical damage behaviour of different LiNbO 3 optical waveguides has been experimentally studied by measuring the intensity output of a single beam as a function of the intensity input. Parallel measurements of photovoltaic currents have been carried out as a function of the input intensity and they have been correlated with the optical damage data. The following LiNbO 3 guides have been studied and compared: proton exchanged (PE) belonging to the phases α, β 1 , β 2 and reverse proton exchanged (RPE) and Zn in-diffused waveguides. The greatest intensity thresholds for optical damage, about 2x10 3 times greater than that of the substrate, have been obtained in RPE guides (they support ordinary polarization and have similar nonlinear optic activity as the substrate) and β 2 guides which support extraordinary polarization (they have no nonlinear optic activity). On the other hand, the lowest photovoltaic currents have been measured in β 1,2 -phases. As a function of the light intensity, the photovoltaic current exhibits a superlinear behaviour, strong in α-phase and weaker in Zn in-diffused and RPE guides. The results for optical damage are discussed in connection with those of photovoltaic currents, paying particular attention to the main mechanisms involved.

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“…In proton-exchanged waveguides, a similar mechanism is observed at room temperature, when light-induced electronic charge gratings are compensated for by light-insensitive, positively charged ions [61,62], which may be explained by a considerably enlarged protonic conductivity of the PE layers.…”

Section: Optical Damage In Planar Waveguidesmentioning

confidence: 69%

Photorefractive Waveguides

Kip

Wesner

Springer Series in Optical Sciences

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Photorefractive charge compensation in α-phase proton-exchanged LiNbO_3 waveguides

Cited by 20 publications

References 26 publications

Conductivity phenomena affecting fixed filters in photorefractive PE:LiNbO3 waveguides

Conductivity phenomena affecting fixed filters in photorefractive PE:LiNbO3 waveguides

Comparative study of optical damage and photovoltaic currents in planar LiNbO 3 waveguides

Photorefractive Waveguides

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