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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Kazansky, Peter
University of Southampton
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (41/41 displayed)
- 2017Ultrafast laser-induced birefringence in various porosity silica glasses: from fused silica to aerogelcitations
- 2015Functional birefringent elements imprinted by femtosecond laser nanostructuring of multi-component glass
- 2015Revealing the nanoparticles aspect ratio in the glass-metal nanocomposites irradiated with femtosecond lasercitations
- 2015Glass-metal nanocomposite modification by femtosecond laser irradiation
- 2014High-purity, broadband, entangled photon pairs generated in poled silica fibers
- 2014Multi-watt all-fiber frequency doubled lasercitations
- 2014All-fiber frequency-doubled visible lasercitations
- 2013Extraordinary anisotropy of ultrafast laser writing in glasscitations
- 2013Laser assisted modification of poled silver-doped nanocomposite soda-lime glass
- 2012Exciton mediated self-organization in glass driven by ultrashort light pulsescitations
- 2011Light coupling and enhanced backscattering in layered plasmonic nanocompositescitations
- 2011Type II parametric downconversion in a poled fiber
- 2010Measurement of X(2) symmetry in a poled fibercitations
- 2010Enhanced light backscattering in thermally poled plasmonic nanocomposite and its application to vapour sensing
- 2010Leaky-modes excitation in thermally poled nanocomposite glass and their exploitation for saturable absorption
- 2010Saturation of absorption in noble metal doped nanocomposite glass film excited by evanescent light fieldcitations
- 2010Poling-assisted fabrication of plasmonic nanocomposite devices in glasscitations
- 2010The problem of achieving high second-order nonlinearities in glasses: The role of electric conductivity in poling of high index glassescitations
- 2010Aperiodically poled silica fibers for bandwidth control of quasi-phase-matched second-harmonic generationcitations
- 2009From type II upconversion to SPDC: a path to broadband polarization entanglement in poled fibers
- 2009High-average-power second-harmonic generation from periodically poled silica fiberscitations
- 2008Low loss photonic components in high index bismuth borate glass by femtosecond laser direct writingcitations
- 2008Ion-exchange-induced formation of glassy electrooptical and nonlinear optical nanomaterialcitations
- 2007Broadly tunable second-harmonic generation in periodically poled silica fiberscitations
- 2007Photon pair source based on parametric fluorescence in periodically poled twin-hole silica fibercitations
- 2007Recent advances in poling and nanostructuring of glass
- 2007Dissolution of embedded gold nanoparticles in sol-gel glass filmcitations
- 2006Creating unusual structures by ultrashort light pulses in glass
- 2006Bleaching of sol-gel glass film with embedded gold nanoparticles by thermal polingcitations
- 2006Breaking symmetry in glass by femtosecond laser irradiation
- 2005Electric field-assisted formation of percolated silver nanolayers inside glasscitations
- 2005Refractive index engineering in glass containing spherical silver nanoparticles using dc electric field
- 2005Origin and enhancement of the second-order non-linear optical susceptibility induced in bismuth borate glasses by thermal polingcitations
- 2004Enhanced stability of the second-order optical nonlinearity in poled glassescitations
- 2004Optical waveguides in electrooptical nanophase glass-ceramicscitations
- 2002Nonlinearity in poled tin-doped silica samples fabricated by sol-gel technique
- 2002Femtosecond laser direct-writing and poling of embedded grating structures
- 2001UV laser-induced current in germanosilicate fibres with built in electrodes
- 2001Thermally poled silica samples are structurally heterogeneous: Electron diffraction evidence of partial crystallizationcitations
- 2000Propagation of cold atoms along a miniature magnetic guidecitations
- 2000Memorized polarization-dependent light scattering in rare-earth-ion-doped glasscitations
Places of action
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conferencepaper
Femtosecond laser direct-writing and poling of embedded grating structures
Abstract
In recent years, the use of a focused femtosecond laser to directly write structures deep within transparent media has attracted much attention due to its ability to write in three-dimensions [1]. By utilizing an amplified Ti:sapphire laser (pulse duration 150fs, repetition rate 250kHz, λ=850nm), we have developed a novel technique that enables us to write grating structures within the bulk of an optical fiber through its cleaved face, allowing control over light subsequently exiting the fiber. Fig 1(a) shows a microscope image of an embedded diffraction grating having a 5µm pitch and buried 25µm below a fiber's cleaved face. Fig 1(b) displays a far-field pattern created by a single-mode fiber which has a two-dimensional grating written 5µm below its cleaved face. The controllability of the power and direction of diffracting orders offers tantalizing opportunities for new methods of optical routing. A further grating of 20µm period and 4µm line width has been directly-written into a silica glass plate (Herasil 1). Thermal poling was carried out on the plate in air for 15 minutes at 280°C with 4kV applied [2]. After poling the grating was investigated using a Nd:YAG laser (λ=1064nm), with a focused spot sue of 20µm. The second harmonic was subsequently imaged by CCD camera. Fig 2(a) shows the second harmonic produced in a Gaussian beam away from the grating region as expected. However, Fig 2(b) shows the second harmonic produced at the position of the irradiated lines to be much stronger indicating that the χ(2) is larger in the Ti:Sapphire irradiated regions. The incident beam is large enough to encompass two grating lines as indicated by the arrows. In Fig 2(a) the brightness is enhanced compared to Fig 2(b) to make the spot visible. By direct-writing periodic structures into silica fibers from the side and subsequent poling, work is currently underway to investigate the feasibility of achieving efficient quasi-phase-matching in silica fibres [3]. Fig.1. (a) A 5µm period diffraction grating written 25µm below a ...