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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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Bartelt, H.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (12/12 displayed)
- 2016Tapered optical fiber tip probes based on focused ion beam-milled Fabry-Perot microcavitiescitations
- 2014Focused ion beam post-processing of optical fiber Fabry-Perot cavities for sensing applicationscitations
- 2014Optical Fiber Fabry-Perot Sensor Fabrication based on Focused Ion Beam Post-Processing
- 2013Opportunities for Structural Health Monitoring of Composite Material Structures with Novel Microstructured Optical Fiber Sensors
- 2012Nanoscopic tip sensors fabricated by gas phase etching of optical glass fibers
- 2011Microstructured optical fiber sensors embedded in a laminate composite for smart material applications
- 2009Response of Fiber Bragg Gratings in Microstructured and Bow Tie Fibers Embedded in Laminated Composite
- 2009Fiber Bragg grating inscription with DUV femtosecond exposure and two beam interferencecitations
- 2009Fiber Bragg Gratings in Microstructured Optical Fibers for Stress Monitoring
- 2009Response of FBGs in Microstructured and Bow Tie Fibers Embedded in Laminated Compositecitations
- 2009Benchmarking the response of Bragg gratings written in microstructured and bow tie fiber embedded in composites
- 2009Transversal load sensing with fiber Bragg gratings in microstructured optical fibers
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document
Fiber Bragg grating inscription with DUV femtosecond exposure and two beam interference
Abstract
Fiber Bragg gratings (FBGs) are today fundamental components in fiber optics. They can be used as sensors, in signal processing, e.g. telecom applications, as wavelength stabilizers in fiber lasers or in dispersion compensators. However, there are applications where the demand for fiber Bragg gratings is not compatible with standard photosensitivity techniques like germanium doping or hydrogen loading. Examples are their use as laser-mirrors in spliceless all fiber fiber-laser solutions or the fiber Bragg grating inscription in suspended core all silica fibers for evanescent field sensing. Fiber Bragg grating inscription with femtosecond-laser exposure is a challenging new method to realize grating structures for waveguides made of materials which do not provide UV-photosensitivity. Especially fs-IR-inscription has been demonstrated for Bragg grating inscription in a variety of material systems such as boron-silica glass, sapphire and pure silica glass. The feasibility of the phase mask FBG inscription technique with DUV femtosecond lasers was also shown, which allows grating inscription even in pure silica microstructured fibers. The phase mask inscription method requires that the fiber will be placed directly behind the phase mask. While the laser beam should be focused onto the fiber to support nonlinear material interaction, this inscription method also leads to phase mask degradations, presumably due to non-bridging oxygen holes (NBOH). Our solution to avoid the mask degradation is to increase the space between fiber and phase mask by using a Talbot-interferometer. Another advantage is the wavelength versatility of this inscription setup. Due to the short temporal coherence length of the femtosecond pulses, the angular alignment variability of the interferometer mirrors is limited and restrictions concerning the wavelength versatility of the interferometer arise. Grating arrays in pure silica suspended core fibers are demonstrated as an example for the versatility of the inscription arrangement. © 2009 SPIE.