Dr. Matthias L. Jäger Profile

Dr. Matthias L. Jäger

Group Leader at Leibniz-Institut für Photonische Technologien eV

SPIE Involvement:

Conference Chair | Editor | Author

Publications (31)

Proceedings Article | 20 June 2024 Presentation + Paper

Visible Pr3+-doped fluoride glass fiber laser

Martin Leich, Alexander Hartung, Anka Schwuchow, Tina Eschrich, Kay Schaarschmidt, Matthias Jäger

Proceedings Volume 13003, 130030F (2024) https://doi.org/10.1117/12.3016980

KEYWORDS: Fiber lasers, Glasses, Laser resonators, Fluoride, ZBLAN, Praseodymium, Visible radiation

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Proceedings Article | 20 June 2024 Presentation + Paper

Investigating nonlinear unidirectional operation in a fiber ring laser

Alexander Hartung, Muhammad Assad Arshad, Matthias Jäger

Proceedings Volume 13003, 1300306 (2024) https://doi.org/10.1117/12.3022361

KEYWORDS: Ring lasers, Fiber lasers, Optical filters, Raman scattering, Output couplers, Switching

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Proceedings Article | 20 June 2024 Presentation

Recent advances in fabrication of large volume doped fiber preform materials

Katrin Wondraczek, Florian Lindner, Martin Leich, Joerg Bierlich, Robert Müller, Roman Sajzew, Michael Duparre, Lothar Wondraczek, Matthias Jaeger

Proceedings Volume PC13003, PC130030C (2024) https://doi.org/10.1117/12.3022320

KEYWORDS: Fabrication, Dopants, Silica, Refractive index, Structured optical fibers, Structural analysis, Spectroscopy, Sintering, Reproducibility, Oxides

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Proceedings Article | 20 June 2024 Presentation

Optical properties of Tm-doped glasses for laser fibres

Martin Leich, Sonja Unger, Anka Schwuchow, Martin Lorenz, Arni Pratiwi, Robert Müller, Jan Dellith, Adrian Lorenz, Matthias Jäger

Proceedings Volume PC13003, PC130030E (2024) https://doi.org/10.1117/12.3022284

KEYWORDS: Optical properties, Glasses, Fiber lasers, Fluorescence, Crystals, Absorption, Laser development, Doping, YAG lasers, Thulium

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Proceedings Article | 13 May 2024 Presentation

Induction and control of directionality in reciprocal fiber ring laser by simple fiber end face reflections

Muhammad Assad Arshad, Alexander Hartung, Matthias Jäger

Proceedings Volume PC12865, PC1286505 (2024) https://doi.org/10.1117/12.3005266

KEYWORDS: Fiber lasers, Signal attenuation, Reflection, Ring lasers, Wave propagation, Wavelength division multiplexing, Raman spectroscopy, Laser damage threshold, Raman scattering, Output couplers

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Proceedings Article | 13 May 2024 Presentation

Visible fluoride glass fiber laser with 1.3 W output power

Martin Leich, Alexander Hartung, Anka Schwuchow, Tina Eschrich, Kay Schaarschmidt, Matthias Jäger

Proceedings Volume PC12865, PC1286506 (2024) https://doi.org/10.1117/12.3000310

KEYWORDS: Fiber lasers, Glasses, Fluoride, ZBLAN, Laser resonators, Near infrared, Light absorption, Laser applications, Ions, Biomedical applications

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Proceedings Article | 8 March 2023 Presentation + Paper

Crystal-derived double-clad fibers for high gain and high efficiency Tm fiber lasers

Martin Leich, Robert Müller, Sonja Unger, Anka Schwuchow, Jan Dellith, Jens Kobelke, Adrian Lorenz, Matthias Jäger

Proceedings Volume 12400, 1240012 (2023) https://doi.org/10.1117/12.2650340

KEYWORDS: Fiber lasers, Crystals, Thulium, Laser crystals, Doping, Aluminum, Silica

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Proceedings Article | 25 May 2022 Presentation + Paper

Glass powder doping of nanocrystal-doped fibres: challenges and results

Dominik Dorosz, Marcin Kochanowicz, Magdalena Lesniak, Robert Müller, Martin Lorenz, Jens Kobelke, Katrin Wondraczek, Rafael Valiente, Andrea Diego-Rucabado, Israel Cano, Fernando Aguado, Jürgen Gluch, Isabel Kinski, Matthias Jäger

Proceedings Volume 12142, 1214202 (2022) https://doi.org/10.1117/12.2624448

KEYWORDS: Glasses, Crystals, Optical fibers, Luminescence, Nanocrystals, Doping, Spectroscopy, Laser crystals, Fiber lasers, Silicates

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Proceedings Article | 5 March 2021 Presentation

Unidirectional lasing using loss management in a reciprocal fiber ring laser

Muhammad Arshad, Arni Pratiwi, Alexander Hartung, Matthias Jäger

Proceedings Volume 11665, 116651O (2021) https://doi.org/10.1117/12.2582086

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Proceedings Article | 14 April 2020 Presentation + Paper

Tunable fiber laser concepts in the 2µm spectral range for tunable dual wavelength emission

Tobias Tiess, Alexander Hartung, Martin Becker, Manfred Rothhardt, Romain Dauliat, Baptiste Leconte, Georges Humbert, Philippe Roy, Matthias Jäger

Proceedings Volume 11357, 1135714 (2020) https://doi.org/10.1117/12.2559948

KEYWORDS: Fiber lasers, Fiber Bragg gratings, Four wave mixing, Terahertz radiation, Q switching, Bragg cells, Optical amplifiers, Thulium, Tunable lasers, Fiber amplifiers

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Proceedings Article | 9 September 2019 Paper

Flexible tuning concept for fiber-integrated lasers featuring multi-wavelength emission with fast switching speeds for DIAL

Tobias Tiess, Martin Becker, Manfred Rothhardt, Hartmut Bartelt, Matthias Jäger

Proceedings Volume 11127, 111272D (2019) https://doi.org/10.1117/12.2529150

KEYWORDS: Fiber Bragg gratings, Fiber lasers, Optical filters, Absorption, LIDAR, Molecules, Modulators, Pulsed laser operation, Resonators, Switching

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Proceedings Article | 17 May 2018 Paper

Raman-based cw supercontinuum generation in a fiber ring laser with low-output coupling

Muhammad Assad Arshad, Alexander Hartung, Mikaёl Leduc, Nicolas Godbout, Hartmut Bartelt, Matthias Jäger

Proceedings Volume 10683, 106833F (2018) https://doi.org/10.1117/12.2311626

KEYWORDS: Diodes, Fiber lasers, Supercontinuum generation, Wave propagation, Continuous wave operation, Dispersion, Raman scattering, Signal attenuation, Semiconductor lasers, Feedback signals

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Proceedings Article | 14 March 2018 Presentation

Laser beam quality improvement of REPUSIL-based rod amplifier with local short adiabatic taper (Conference Presentation)

Yuan Zhu, Martin Lorenz, Tina Eschrich, Martin Leich, Claudia Aichele, Jens Kobelke, Hartmut Bartelt, Matthias Jäger

Proceedings Volume 10512, 105121H (2018) https://doi.org/10.1117/12.2286895

KEYWORDS: Fiber amplifiers, Amplifiers, Diffusion, Fiber lasers, Laser processing, Multimode fibers, Tapered optical fibers

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Proceedings Article | 21 April 2017 Presentation

Tunable Yb-doped fiber laser based on a FBG array and a theta ring resonator ensuring a constant repetition rate (Conference Presentation)

Tobias Tiess, Martin Becker, Manfred Rothhardt, Hartmut Bartelt, Matthias Jäger

Proceedings Volume 10083, 100831D (2017) https://doi.org/10.1117/12.2250315

KEYWORDS: Fiber Bragg gratings, Fiber lasers, Optical filters, Tunable lasers, Resonators, Pulsed laser operation, Laser development, Spectroscopy, Laser applications, Electronic filtering

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SPIE Journal Paper | 13 June 2016

Discretely tunable thulium-doped fiber-based polarization-maintaining master oscillator power amplifier using fiber Bragg grating arrays as spectral filters

Tobias Tiess, Saher Junaid, Martin Becker, Manfred Rothhardt, Hartmut Bartelt, Matthias Jäger

OE, Vol. 55, Issue 06, 064106, (June 2016) https://doi.org/10.1117/12.10.1117/1.OE.55.6.064106

KEYWORDS: Fiber Bragg gratings, Optical filters, Oscillators, Fiber lasers, Phase modulation, Optical amplifiers, Polarization, Fiber amplifiers, Amplifiers, Tunable lasers

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Proceedings Article | 9 March 2016 Paper

Discretely tunable Tm-doped fiber-based MOPA using FBG arrays as spectral filters

T. Tiess, S. Junaid, M. Becker, M. Rothhardt, H. Bartelt, M. Jäger

Proceedings Volume 9728, 97280N (2016) https://doi.org/10.1117/12.2212485

KEYWORDS: Fiber Bragg gratings, Fiber lasers, Optical filters, Biomedical optics, Phase modulation, Tunable lasers, Pulsed laser operation, YAG lasers, Materials processing, Light sources, Amplifiers, Oscillators, Thulium, Modulators, Absorption

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Proceedings Article | 28 September 2015 Paper

All-fiber laser mode-locked by the acousto-optic modulation of a fiber Bragg grating in suspended core fiber

Ricardo Silva, Tobias Tiess, Martin Becker, Tina Eschrich, Manfred Rothhardt, Matthias Jäger, Alexandre Pohl, Hartmut Bartelt

Proceedings Volume 9634, 963420 (2015) https://doi.org/10.1117/12.2194929

KEYWORDS: Fiber lasers, Mode locking, Fiber Bragg gratings, Modulation, Acoustics, Ferroelectric materials, Bragg cells, Modulators, Acousto-optics, Picosecond phenomena

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Proceedings Article | 4 March 2015 Paper

High peak power amplification in large-core all-solid Yb fibers with an index-elevated pump clad and a low numerical aperture core

M. Leich, Wenbin He, S. Grimm, J. Kobelke, Yuan Zhu, B. Müller, Jörg Bierlich, H. Bartelt, M. Jäger

Proceedings Volume 9344, 93440T (2015) https://doi.org/10.1117/12.2078738

KEYWORDS: Cladding, Optical fibers, Amplifiers, Refractive index, Aluminum, Signal attenuation, Ytterbium, Absorption, Raman scattering, Fiber amplifiers

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Proceedings Article | 4 March 2015 Paper

Electrically tunable fiber-integrated Yb-doped laser covering 74 nm based on a fiber Bragg grating array

T. Tiess, M. Rothhardt, C. Chojetzki, M. Jäger, H. Bartelt

Proceedings Volume 9344, 93440G (2015) https://doi.org/10.1117/12.2077707

KEYWORDS: Fiber Bragg gratings, Optical filters, Fiber lasers, Tunable lasers, Ytterbium, Pulsed laser operation, Modulation, Reflectivity, Spectral resolution, Resonators

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Proceedings Article | 20 February 2015 Paper

Demonstration of >5kW emissions with good beam quality from two different 7:1 all-glass fiber coupler-types

M. Plötner, T. Eschrich, O. de Vries, J. Kobelke, S. Unger, M. Jäger, T. Schreiber, H. Bartelt, R. Eberhardt, A. Tünnermann

Proceedings Volume 9346, 93460W (2015) https://doi.org/10.1117/12.2077580

KEYWORDS: Fiber lasers, Fiber couplers, Multimode fibers, Cladding, Fiber optics, Single mode fibers, Step index fibers, Capillaries, Silicon, Precision optics

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SPIE Journal Paper | 3 June 2014 Open Access

Length distributed measurement of temperature effects in Yb-doped fibers during pumping

Martin Leich, Julia Fiebrandt, Anka Schwuchow, Sylvia Jetschke, Sonja Unger, Matthias Jäger, Manfred Rothhardt, Hartmut Bartelt

OE, Vol. 53, Issue 06, 066101, (June 2014) https://doi.org/10.1117/12.10.1117/1.OE.53.6.066101

KEYWORDS: Optical fibers, Fiber Bragg gratings, Temperature metrology, Ytterbium, Absorption, Ultraviolet radiation, Cerium, Fiber lasers, Optical pumping, Hydrogen

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Proceedings Article | 7 March 2014 Paper

Investigation of a large core 976nm Yb fiber laser for high brightness fiber-based pump sources

Martin Leich, Matthias Jäger, Stephan Grimm, Jan Dellith, Denny Hoh, Sylvia Jetschke, Martin Becker, Alexander Hartung, Tina Eschrich, Jens Kobelke, Hartmut Bartelt

Proceedings Volume 8961, 89610Z (2014) https://doi.org/10.1117/12.2039169

KEYWORDS: Fiber lasers, Ytterbium, Laser resonators, Fiber Bragg gratings, Refractive index, Glasses, Resonators, Fiber couplers, Diodes, Semiconductor lasers

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Proceedings Article | 7 March 2014 Paper

Spatially resolved in-core temperature measurement in rare-earth doped fibers during pumping

Julia Fiebrandt, Martin Leich, Sonja Unger, Anka Schwuchow, Matthias Jäger, Manfred Rothhardt, Hartmut Bartelt

Proceedings Volume 8982, 898206 (2014) https://doi.org/10.1117/12.2037663

KEYWORDS: Fiber Bragg gratings, Optical fibers, Temperature metrology, Fiber lasers, Absorption, Fabrication, Cerium, Optical pumping, Fiber amplifiers, Near infrared

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Proceedings Article | 15 October 2013 Paper

All-fiber time-delay spectrometer based on an array of fiber Bragg gratings

T. Tiess, M. Rothhardt, M. Jäger, H. Bartelt

Proceedings Volume 8924, 89243B (2013) https://doi.org/10.1117/12.2031733

KEYWORDS: Fiber Bragg gratings, Spectroscopy, Spectral resolution, Sensors, Temporal resolution, Reflectivity, Pulsed laser operation, Fiber optics, Photodiodes, Oscilloscopes

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Proceedings Article | 6 March 2013 Paper

Equivalent step-index model of multifilament core fibers

Ron Spittel, Adrian Lorenz, Sylvia Jetschke, Matthias Jäger, Hartmut Bartelt

Proceedings Volume 8627, 862714 (2013) https://doi.org/10.1117/12.2001879

KEYWORDS: Microsoft Foundation Class Library, Optical fibers, Refractive index, Finite element methods, Waveguides, Step index fibers, Cladding, Dispersion, Information operations, Electroluminescence

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Proceedings Article | 22 February 2013 Paper

Design evolution, long term performance and application tests of extra large mode area (XLMA) fiber lasers

Andreas Langner, Mario Such, Gerhard Schötz, Florian Just, Martin Leich, Stephan Grimm, Jan Dellith, Matthias Jäger, Kay Schuster, Hagen Zimer, Marcin Kozak, Björn Wedel, Georg Rehmann, Charley Bachert, Volker Krause

Proceedings Volume 8601, 86010G (2013) https://doi.org/10.1117/12.2000472

KEYWORDS: Fiber lasers, Silica, Absorption, Ytterbium, Cladding, Coating, Aluminum, Backscatter, Laser systems engineering, Doping

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Proceedings Article | 26 April 2012 Paper

The influence of the drawing process on the intrinsic stress in optical fibers and the arising possibility to optimize the birefringence of PM fibers

Florian Just, Matthias Jäger, Hartmut Bartelt

Proceedings Volume 8426, 84260K (2012) https://doi.org/10.1117/12.922599

KEYWORDS: Optical fibers, Birefringence, Cladding, Glasses, Heat treatments, Phase modulation, Refractive index, Polarization, Phase shifts, Temperature metrology

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The properties of optical fibers can significantly be influenced by intrinsic stress. It is well known that these stresses are caused by various reasons, e.g. the variations in the thermal expansion coecient of the differently doped regions in the fiber. The so called thermal stresses are only dependent on the composition of the fiber and not on its preparation history. Another main reason for stress in the final fiber is the mechanical force that is applied during the fiber drawing process. It generates so called mechanical stress that depends on the composition of the fiber and the thermal history of the fiber fabrication process. Using a non-destructive polarimetric system, we are able to measure the intrinsic stress state in optical fibers as well as in their preforms. Knowing on the one hand the thermal induced stresses in the preform of a fiber and on the other hand the final stress state in the fiber itself, we are able to differentiate between the two kinds of stress. In this paper we present results of stress measurements on optical ber preforms and fibers. We show, that the measured stress profile in the preform matches the theoretically assumed stress profile for thermal stress very well. Moreover we used this preform to draw fibers under different drawing conditions represented in a large difference in the applied force during the fiber drawing. We present the stress results for these differently fabricated fibers and show how huge the effect of the drawing tension can be. We find that for high drawing forces, the stress state can be reversed in comparison to the thermal stresses that are induced by the material composition. Due to the fact that stress on the one hand has a strong effect on the mechanical properties of glass and modifies the refractive index, this can lead to signicant effects on the fiber stability and modal behaviour. Finally, we present a way to compensate the additionally induced mechanical stress, which is for example a very good possibility to increase the stress birefringence in polarization maintaining (PM) fibers with panda structure. We compare the mechanical stress states of such Panda Fibers after their fabrication with the state after an additional high temperature step. We clearly find that it is possible to improve the birefringence of these fibers using appropriate preparation steps.

Proceedings Article | 26 April 2012 Paper

Approximation of the effective refractive index of surface plasmons propagating along micron-sized gold wires in photonic crystal fibers

Ron Spittel, Matthias Jäger, Hartmut Bartelt

Proceedings Volume 8426, 84260U (2012) https://doi.org/10.1117/12.922589

KEYWORDS: Metals, Gold, Silica, Refractive index, Capillaries, Liquids, Wave propagation, Surface plasmons, Surface plasmon polaritons, Photonic crystals

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Proceedings Article | 4 October 2005 Paper

Fiber lasers and amplifiers with reduced optical nonlinearities employing large mode area fibers

Matthias Jäger, Stéphane Caplette, Paul Verville, Alain Villeneuve

Proceedings Volume 5971, 59710N (2005) https://doi.org/10.1117/12.631222

KEYWORDS: Fiber lasers, Fiber amplifiers, Single mode fibers, Optical amplifiers, Nonlinear optics, Fiber Bragg gratings, High power fiber amplifiers, Diodes, Absorption, Amplifiers

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Proceedings Article | 29 July 1997 Paper

Poling and characterization of photonic waveguide devices for efficient second-harmonic generation

Matthias Jaeger, George Stegeman, Siegfried Bauer, Simona Bauer-Gogonea, Walter Brinker, S. Yilmaz, Werner Wirges

Proceedings Volume 10290, 102900K (1997) https://doi.org/10.1117/12.279827

KEYWORDS: Photonic devices, Waveguides, Second-harmonic generation, Frequency conversion, Electroactive polymers, Polymers

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Proceedings Article | 22 January 1997 Paper

Preparation of chi(2)-inverted waveguides with poled polymers for efficient second-harmonic generation

S. Yilmaz, Werner Wirges, Walter Brinker, Simona Bauer-Gogonea, Stefan Bauer, Matthias Jaeger, George Stegeman, M. Ahlheim, M. Staehelin, B. Zysset, F. Lehr, Mart Diemeer, M. Flipse

Proceedings Volume 3006, (1997) https://doi.org/10.1117/12.264247

KEYWORDS: Polymers, Waveguides, Second-harmonic generation, Electro optics, Phase modulation, Dispersion, Thermal analysis, Harmonic generation, Electroactive polymers, Nonlinear optics

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