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Some initial results with acoustic superlattice transducers made by domain inversion of LiNbO3

Autor: Gnewuch, H., Zayer, N., Pannell, C.N., Ross, G.W., Smith, P.G.R.

Conventional acoustic transducers for acousto-optic devices are typically made by bonding a plate of piezoelectric material such as LiNbO3 to the crystal or glass in which the acousto-optic interaction is to take place. The plate is then thin lapped

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od_______348::07f566e66be0929a12416ce0640f82d1
https://eprints.soton.ac.uk/76527/

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Fast transient response of light deflectors based on periodically poled LiNbO3

Autor: Gnewuch, H., Pannell, C.N., Ross, G.W., Smith, P.G.R., Geiger, H.

Publikováno v: Conference on Lasers and Electro-Optics-Europe.

Recently, integrated-optical elements, such as lenses, prisms, and gratings, have been demonstrated by domain-inversion in thin Lithium Niobate wafers and by applying a homogeneous electric field between the planar surface electrodes, see e.g. [1]. H

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::39017533ea08dfadefb50fda16927168
https://doi.org/10.1364/cleo_europe.1998.cme7

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Tunable spatial mode beating for distributed sensing

Autor: Gnewuch, H., Ulrich, R., Wilkinson, J.S.

We propose a novel interrogation method, which is suitable for distributed sensing of fluorescent yields. In contrast to temporal multiplexing schemes the spatial resolution is not limited by the fluorescence lifetime. We describe the practical imple

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od_______348::298bf1cf5986d9184d94e915f6f34989
https://eprints.soton.ac.uk/76661/

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Nanosecond response of bulk-optical Bragg-diffraction modulator based on periodically poled LiNbO3

Autor: Gnewuch, H., Pannell, C.N., Ross, G.W., Geiger, H., Smith, P.G.R.

For the first time transients are measured for a bulk-optical Bragg-diffraction modulator based on an electro-optically induced grating in periodically poled LiNbO3 (PPLN). Optical pulse risetimes of 1.2 nsec are reported with a first order diffracti

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od_______348::f377cf95c1d4bfa57a7b995c6e868f13
https://eprints.soton.ac.uk/77889/

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Modal spectroscopy of multimode optical waveguides

Autor: Ulrich, R., Stolte, R., Gnewuch, H., Tartarini, G.

In many integrated-optical devices operation is based on distributed coupling between two guided modes. Examples are directional couplers, travelling wave modulators and polarisation converters. In fabricating such devices it is a fundamental task to

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od_______348::585b42102b1b2b17444c30a417bdaf10
https://eprints.soton.ac.uk/76897/

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Optical biosensor techniques for monitoring organic pollutants in the aquatic environment

Autor: Luff, B.J., Harris, R.D., Gnewuch, H., Wilkinson, J.S.

The principal contribution of Southampton University to the BIOPTICAS project is in the realization of planar optical waveguide probes to determine the optical properties of attached sensing films. Three types of device are being investigated: surfac

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od_______348::78d52c84df5c8176a0b294adb815f545
https://eprints.soton.ac.uk/77106/

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