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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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Baghdasaryan, Tigran
Vrije Universiteit Brussel
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (8/8 displayed)
- 2023Reflective Type Multi-Nanolayer Electro-Optical Modulator for Free Space Chip-to-Chip Optical Interconnection: Electromagnetic Modelling by the Method of Single Expressioncitations
- 2022Simultaneous modal phase and group velocity matching in microstructured optical fibers for second harmonic generation with ultrashort pulsescitations
- 2022Transmission Type Nano-Layered Electro-Optical Modulator for Chip-to-Chip Optical Interconnection: Electromagnetic Modelling by the Method of Single Expressioncitations
- 20203D direct laser writing of microstructured optical fiber tapers on single-mode fibers for mode-field conversioncitations
- 2020Selective liquid filling of photonic crystal fibers using two-photon polymerization lithography without post-exposure developmentcitations
- 2019Electromagnetic energy flow in confined regions of evanescent waves: wavelength-scale analysis by the method of single expressioncitations
- 2014Challenges in the fabrication of fibre Bragg gratings in silica and polymer
- 2012Towards Flexible Photonic Sensing Skins with Optical Fiber Sensors
Places of action
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article
Simultaneous modal phase and group velocity matching in microstructured optical fibers for second harmonic generation with ultrashort pulses
Abstract
<p>Optical fibers provide a favorable medium for nonlinear optical processes owing to the small mode field size and concurrently high optical intensity combined with the extended interaction lengths. Second harmonic generation (SHG) is one of those processes that has been demonstrated in silica glass optical fibers. Since silica is centrosymmetric, generating SHG in an optical fiber requires poling of the glass. In addition and when one wants to use ultrashort pulses for SHG, achieving both phase and group velocity matching is crucial. Although fibers that feature either modal phase velocity or group velocity matching for SHG have been reported, the possibility of simultaneous modal phase and group velocity matching was never reported before. In this paper we address this challenge, and for the first time to our knowledge, we show that it is feasible to do so with silica microstructured optical fibers featuring at least one ring of air holes in the cladding and a heavily Germanium doped core (above 25 mol.%) by exploiting the LP<sub>01</sub>(ω) and LP<sub>02</sub>(2ω) modes at 1.06 µm pump and 0.53 µm second harmonic wavelengths. This finding can greatly impact applications requiring waveguide based SHG generation with ultrashort pulses, including microscopy, material characterization and nonlinear imaging.</p>