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Waveguide fabrication in KDP crystals with femtosecond laser pulses

Applied Physics A: Materials Science and Processing, 2014, Vol.118(3), pp.831-836 [Peer Reviewed Journal]

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  • Title:
    Waveguide fabrication in KDP crystals with femtosecond laser pulses
  • Author: Huang, L. ; Salter, P. ; Karpiński, M.ł ; Smith, B. ; Payne, F. ; Booth, M.
  • Found In: Applied Physics A: Materials Science and Processing, 2014, Vol.118(3), pp.831-836 [Peer Reviewed Journal]
  • Subjects: Waveguides ; Phosphates ; Neural Circuitry ; Femtosecond Lasers
  • Rights: Copyright 2015 Elsevier B.V., All rights reserved.
  • Description: Byline: Leilei Huang (1), Patrick Salter (1), MichaA KarpiAski (2), Brian Smith (2), Frank Payne (1), Martin Booth (1,3) Abstract: Optical waveguides fabricated in potassium dihydrogen phosphate (KDP) by ultrafast laser pulses are demonstrated. Dependent on the incident pulse energy, two different types of refractive index modification have been induced. For moderate laser powers, type I homogeneous waveguides are created. At higher pulse energies, type II waveguides are formed in the stressed area surrounding regions of laser-induced damage. Double-line and four-line structures are applied to the type II guides to increase mode confinement. Polarization sensitivity and transmission properties of the written waveguides are characterized and discussed. The results indicate that high-quality waveguides can be fabricated in KDP, which has potential for further applications in nonlinear integrated-optics. Author Affiliation: (1) Department of Engineering Science, University of Oxford, Parks Road, Oxford, OX1 3PJ, UK (2) Clarendon Laboratory, Department of Physics, University of Oxford, Parks Road, Oxford, OX1 3PU, UK (3) Centre for Neural Circuits and Behaviour, University of Oxford, Mansfield Road, Oxford, OX1 3SR, UK Article History: Registration Date: 17/11/2014 Received Date: 03/07/2014 Accepted Date: 16/11/2014 Online Date: 30/11/2014
  • Identifier: ISSN: 09478396 ; E-ISSN: 14320630 ; DOI: 10.1007/s00339-014-8899-9

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