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Hans Georg Limberger

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Related publications (41)

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Stress changes in H2-loaded SMF optical fibers induced by cw-Ar+ 244 nm irradiation

Hans Georg Limberger, Nandita Aggarwal, Georgios Violakis

Bragg gratings were inscribed in H2-loaded SMF-28e optical fibers and measured for axial stress changes for various exposure doses. Mean refractive index changes as high as 7.5 × 10-3 were observed under cw-244 nm irradiation of 143 W/cm2. Bragg grating re ...

Optical Soc Amer2012

Photosensitivity and stress changes of Ge-free Bi-Al doped silica optical fibers under ArF excimer laser irradiation

Hans Georg Limberger

The photosensitivity of germanium free Bi-Al-doped silica fibers with different bismuth concentrations was investigated using ArF excimer laser radiation at 193 nm and fiber grating formation. For the fiber with the highest bismuth concentration maximum re ...

Optical Society of America2011

UV-induced index changes in undoped fluoride glass

Hans Georg Limberger, Theo Lasser, Marcel Zeller

Undoped fluoride glass slides have been exposed to pulsed 193-nm ultraviolet (UV) irradiation. Their absorption changes have been measured to evaluate UV-induced index changes using Kramers-Kronig relation. A layer-peeling polishing technique was applied t ...

IEEE Institute of Electrical and Electronics Engineers2005

An all-fiber Pr/Yb-doped up-conversion laser in different laser operation modes

Hans Georg Limberger, Theo Lasser, Marcel Zeller

Fiber laser systems have the potential to represent an interesting alternative to more conventional laser sources emitting in the visible spectral range. In this contribution we present new results based on fluoride Pr/Yb- doped fiber systems. This Pr/Yb-d ...

2006

Monitoring strain gradients in adhesive composite joints by embedding fibre Bragg grating sensors

Véronique Michaud, Hans Georg Limberger, John Botsis, Georgios Violakis, Behzad Dehghan Manshadi, Luis Pablo Canal Casado

2013

Direct measurement of fiber Bragg grating local birefringence using optical low coherence reflectometry

René Salathé, Hans Georg Limberger, Dragan Coric

Optical low coherence reflectometry (OLCR) was used for the measurement of the local fiber Bragg grating (FBG) birefringence. The birefringence with resolution of 4 x 10(-6) was determined directly from oscillations in the OLCR amplitude with a spatial res ...

2005

Fabrication of Bragg Gratings in Microstructured Bi:SiO2 Optical Fiber Using an ArF Laser

Hans Georg Limberger, Georgios Violakis

An ArF excimer laser was used to fabricate Bragg gratings in Bi:SiO2 core - microstructured cladding optical fiber. Average and modulated refractive index changes of 2.7 × 10E-4 and 1.0 × 10E-4 were induced in pristine fiber. Fiber luminescence was also me ...

IEEE2012

UV induced fiber Bragg gratings (FBG) written in fully polymerized polymer optical fibers (POF)

René Salathé, Hans Georg Limberger, Nico Gérard Harbach

2007

Strong asymmetric stresses arc-induced in pre-annealed nitrogen-doped fibres

Hans Georg Limberger, Florian Dürr

2006

Influence of Humidity and Temperature on Polymer Optical Fiber Bragg Gratings

René Salathé, Hans Georg Limberger, Nico Gérard Harbach

Water sorption of 100% changes the POFBG peak wavelength by 8.1 nm (at 1.54 micrometer). The temperature sensitivity depends on water content and is -10, -34, and -138 pm/K in dry, wet, and ambient conditions. ...

2010

Buried channel waveguides in Yb-doped KY(WO4)2 crystals fabricated by femtosecond laser irradiation

René Salathé, Hans Georg Limberger

Elsevier2007

Strong fiber Bragg gratings in Bi-Al co-doped H2-loaded optical fibers using CW-Ar+ laser

Hans Georg Limberger, Georgios Violakis

Bragg gratings with reflectivity > 93% were fabricated in Bi-Al co-doped H-2-loaded optical fibers. Average index changes as high as +2.5x10(-3) were obtained. Positive core stress changes indicate a compaction contribution to the total index change. ...

Optical Soc America, 2010 Massachusetts Ave Nw, Washington, Dc 20036 Usa2011

Stress profiling of arc-induced long-period gratings written in pure-silica-core fibers

Hans Georg Limberger, Florian Dürr

2005

Fabrication and thermal decay of fiber Bragg gratings in pristine and H-2-loaded Bi-Al co-doped optical fibers

Hans Georg Limberger, Georgios Violakis

A cw-244-nm-Ar+ laser was used to fabricate Bragg gratings in pristine and H-2-loaded Bi-Al-SiO2 optical fibers with index changes as high as 3.6 x 10(-4) and 19.3 x 10(-4), respectively. For comparison, fiber Bragg gratings in pristine and H-2-loaded SMF- ...

Optical Society of America2011

Thermal decay of ArF-excimer-laser fabricated fiber Bragg gratings in Bi-Al-doped optical fibers

Hans Georg Limberger, Georgios Violakis, Pouneh Saffari

Fiber Bragg Gratings were fabricated using a 193-nm-ArF-excimer laser with ac index changes of 0.6×10E-4 and 2.2×10E-4 in pristine and H2-loaded Bi-Al-SiO2 fibers. Thermal annealing of the FBGs was investigated using continuous isochronal annealing. ...

2012

Distributed measurements of fiber birefringence and diametric load using optical low-coherence reflectometry and fiber gratings

René Salathé, Hans Georg Limberger, Dragan Coric

Optical Society of America2006

Light-controlled reconfigurable fiber bragg gratings written in attenuation fiber

René Salathé, Hans Georg Limberger, Dragan Coric

A novel type of light controlled fiber Bragg gratings written in attenuation fiber is demonstrated. The spectral reconfiguration can be controlled by the pump power, the pumping configuration, the grating position and the fiber attenuation. © Optical Socie ...

Institute of Electrical and Electronics Engineers Computer Society2007

Hans Georg Limberger

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Stress changes in H2-loaded SMF optical fibers induced by cw-Ar+ 244 nm irradiation

Photosensitivity and stress changes of Ge-free Bi-Al doped silica optical fibers under ArF excimer laser irradiation

UV-induced index changes in undoped fluoride glass

An all-fiber Pr/Yb-doped up-conversion laser in different laser operation modes

Monitoring strain gradients in adhesive composite joints by embedding fibre Bragg grating sensors

Direct measurement of fiber Bragg grating local birefringence using optical low coherence reflectometry

Fabrication of Bragg Gratings in Microstructured Bi:SiO2 Optical Fiber Using an ArF Laser

UV induced fiber Bragg gratings (FBG) written in fully polymerized polymer optical fibers (POF)

Strong asymmetric stresses arc-induced in pre-annealed nitrogen-doped fibres

Influence of Humidity and Temperature on Polymer Optical Fiber Bragg Gratings

Buried channel waveguides in Yb-doped KY(WO4)2 crystals fabricated by femtosecond laser irradiation

Strong fiber Bragg gratings in Bi-Al co-doped H2-loaded optical fibers using CW-Ar+ laser

Stress profiling of arc-induced long-period gratings written in pure-silica-core fibers

Fabrication and thermal decay of fiber Bragg gratings in pristine and H-2-loaded Bi-Al co-doped optical fibers

Thermal decay of ArF-excimer-laser fabricated fiber Bragg gratings in Bi-Al-doped optical fibers

Distributed measurements of fiber birefringence and diametric load using optical low-coherence reflectometry and fiber gratings

Light-controlled reconfigurable fiber bragg gratings written in attenuation fiber

Annealing-induced stress changes in UV-irradiated germanium-doped fibers

Tomographic stress profiling of arc-induced long-period fiber gratings

Distributed sensing of diametric load using Optical Low Coherence Reflectometry and fiber Bragg gratings