Prof. Hartmut Bartelt Profile

Prof. Hartmut Bartelt

Professor/Dept Head at Leibniz-Institut für Photonische Technologien eV

SPIE Involvement:

Author

Publications (130)

Proceedings Article | 18 April 2021 Presentation + Paper

Ultra-compact acousto-optic modulator of a fibre Bragg grating in a highly birefringent suspended core fibre

Ricardo da Silva, Egor Manuylovich, Namita Sahoo, Martin Becker, Manfred Rothhardt, Hartmut Bartelt, David Webb

Proceedings Volume 11773, 117730U (2021) https://doi.org/10.1117/12.2592228

KEYWORDS: Fiber Bragg gratings, Modulation, Ferroelectric materials, Acousto-optics, Modulators, Bragg cells, Silica, Acoustics, Single mode fibers, Pulsed laser operation

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Proceedings Article | 3 October 2019 Paper

Enhanced temperature sensing with Vernier effect on fiber probe based on multimode Fabry-Perot interferometer

André Gomes, Martin Becker, Jan Dellith, Mohammad Zibaii, Hamid Latifi, Manfred Rothhardt, Hartmut Bartelt, Orlando Frazão

Proceedings Volume 11207, 112071I (2019) https://doi.org/10.1117/12.2527399

KEYWORDS: Fabry–Perot interferometry, Interferometers, Biosensing, Sensors, Optical fibers, Multimode fibers, Superposition, Temperature sensors

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Proceedings Article | 3 October 2019 Paper

In-plane wavelength multiplexing of fibre Bragg gratings in a multicore optical fibre

Ravil Idrisov, Manfred Rothhardt, Hartmut Bartelt

Proceedings Volume 11207, 112072O (2019) https://doi.org/10.1117/12.2530812

KEYWORDS: Fiber Bragg gratings, Optical fibers, Multiplexing, Refractive index, Sensors, Structured optical fibers, Spectroscopy, Wavelength division multiplexing, Telecommunications, Optical sensors

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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 | 27 February 2019 Presentation + Paper

Novel approach for high-performance optical fibers: multiple-doped silica powders with plasma-enhanced processes

T. Trautvetter, H. Baierl, V. Reichel, A. Scheffel, J. Dellith, D. Köpp, F. Hempel, M. Baeva, R. Methling, R. Foest, L. Wondraczek, K. Wondraczek, H. Bartelt

Proceedings Volume 10914, 109140Y (2019) https://doi.org/10.1117/12.2507421

KEYWORDS: Plasma, Atmospheric plasma, Silica, Aluminum, Oxygen, Microwave radiation, Ytterbium, Glasses, Waveguides, Optical fibers

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Proceedings Article | 18 August 2018 Presentation + Paper

Multi-path interferometer structures with cleaved silica microspheres

André Gomes, Beatriz Silveira, Fatemeh Karami, Mohammad Zibaii, Hamid Latifi, Jan Dellith, Martin Becker, Manfred Rothhardt, Hartmut Bartelt, Orlando Frazão

Proceedings Volume 10749, 107490O (2018) https://doi.org/10.1117/12.2319082

KEYWORDS: Fiber optics sensors, Interferometry, Interferometers, Ion beams, Silica, Temperature metrology, Modulation, Fourier transforms, Multimode fibers

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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 | 23 April 2017 Paper

Multi-wavelength reflection spectra from an acousto-optic modulated fiber Bragg grating in a highly birefringent suspended core fiber

Ricardo Silva, Martin Becker, Manfred Rothhardt, Hartmut Bartelt, Alexandre A. Pohl

Proceedings Volume 10323, 103238P (2017) https://doi.org/10.1117/12.2265696

KEYWORDS: Fiber Bragg gratings, Acousto-optics, Modulation, Acoustics, Polarization, Reflectivity, Optical filters, Ferroelectric materials, Single mode fibers, Fiber lasers

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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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Proceedings Article | 24 November 2016 Paper

Ultra-small Fabry-Perot cavities in tapered optical fibers

Stephen Warren-Smith, Ricardo André, Jan Dellith, Hartmut Bartelt

Proceedings Volume 10013, 100131A (2016) https://doi.org/10.1117/12.2243631

KEYWORDS: Fabry–Perot interferometers, Sensors, Optical fibers, Ion beams, Fiber optics sensors, Tapered optical fibers, Refractive index, Reflection, Water, Interferometers

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Proceedings Article | 15 September 2016 Presentation + Paper

Tapered optical fiber tip probes based on focused ion beam-milled Fabry-Perot microcavities

Ricardo André, Stephen Warren-Smith, Martin Becker, Jan Dellith, Manfred Rothhardt, M. Zibaii, H. Latifi, Manuel B. Marques, Hartmut Bartelt, Orlando Frazão

Proceedings Volume 9927, 99270R (2016) https://doi.org/10.1117/12.2236321

KEYWORDS: Refractive index, Tapered optical fibers, Optical microcavities, Ion beams, Fabry–Perot interferometers, Wet etching, Silica, Water, Ions, Solids

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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 | 30 May 2016 Paper

Fiber probe microcavities for refractive index and temperature discrimination

Ricardo André, Stephen Warren-Smith, Martin Becker, Jan Dellith, Manfred Rothhardt, M. Zibaii, H. Latifi, Manuel Marques, Hartmut Bartelt, Orlando Frazão

Proceedings Volume 9916, 991616 (2016) https://doi.org/10.1117/12.2236009

KEYWORDS: Optical microcavities, Refractive index, Ion beams, Structured optical fibers, Fabry–Perot interferometry, Fiber optics sensors, Laser beam diagnostics, Electronic filtering, Fourier transforms, Bandpass filters, Sensors, Water, Ions, Silica

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Proceedings Article | 29 April 2016 Paper

Multiplexed refractive index-based sensing using optical fiber microcavities

Stephen Warren-Smith, Ricardo André, Jan Dellith, Hartmut Bartelt

Proceedings Volume 9899, 98991G (2016) https://doi.org/10.1117/12.2227113

KEYWORDS: Optical fibers, Multiplexing, Sensors, Fiber optics sensors, Ion beams, Refractive index, Fabry–Perot interferometers, Interferometry, Fourier transforms, Coating, Optical sensing, Reflection, Bioalcohols

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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

Birefringence properties of a polarization maintaining Panda fibre during Bragg grating regeneration

Leonhard Polz, Andreas Jarsen, Hartmut Bartelt, Johannes Roths

Proceedings Volume 9634, 96345Q (2015) https://doi.org/10.1117/12.2194931

KEYWORDS: Birefringence, Fiber Bragg gratings, Annealing, Polarization, Temperature metrology, Phase modulation, Hydrogen, Polarization maintaining fibers, Refractive index, Boron

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Proceedings Article | 28 September 2015 Paper

Bragg grating fabrication on tapered fiber tips based on focused ion beam milling

Ricardo André, Martin Becker, Jan Dellith, Manfred Rothhardt, M. Zibaii, H. Latifi, Manuel Marques, Hartmut Bartelt, Orlando Frazão

Proceedings Volume 9634, 96343I (2015) https://doi.org/10.1117/12.2194978

KEYWORDS: Fiber Bragg gratings, Ion beams, Refractive index, Bioalcohols, Sensors, Structured optical fibers, Scanning electron microscopy, Modulation, Silica, Temperature metrology

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Proceedings Article | 28 September 2015 Paper

Fiber Bragg grating inscription in optical multicore fibers

Martin Becker, Tino Elsmann, Adrian Lorenz, Ron Spittel, Jens Kobelke, Kay Schuster, Manfred Rothhardt, Ines Latka, Sebastian Dochow, Hartmut Bartelt

Proceedings Volume 9634, 96343C (2015) https://doi.org/10.1117/12.2194829

KEYWORDS: Fiber Bragg gratings, Optical filters, Multimode fibers, Waveguides, Refractive index, Single mode fibers, Manufacturing, Modulation, Fiber lasers, Biomedical optics

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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 | 1 July 2015 Paper

Optical Bragg grating sensor fibers for ultra-high temperature applications

Hartmut Bartelt, Tino Elsmann, Tobias Habisreuther, Kay Schuster, Manfred Rothhardt

Proceedings Volume 9655, 96552S (2015) https://doi.org/10.1117/12.2185623

KEYWORDS: Optical fibers, Fiber Bragg gratings, Sapphire, Crystals, Sensors, Optical sensors, Chemical elements, Glasses, Modulation, Reflectivity

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Proceedings Article | 16 March 2015 Paper

The REPUSIL process and the capability of fluorine doping for the adjustment of optical and thermochemical properties in silica materials

K. Schuster, St. Grimm, A. Kalide, Jan Dellith, M. Leich, A. Schwuchow, S. Unger, A. Langner, G. Schötz, H. Bartelt

Proceedings Volume 9359, 935914 (2015) https://doi.org/10.1117/12.2077395

KEYWORDS: Fluorine, Silica, Aluminum, Glasses, Refractive index, Doping, Ytterbium, Cladding, Thermography, Ions

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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 | 2 June 2014 Paper

Miniaturized total temperature probe based on fibre Bragg gratings

Leonhard Polz, Tasja Berghaus, Markus Klose, Andreas Zeisberger, Hartmut Bartelt, Johannes Roths

Proceedings Volume 9157, 91579F (2014) https://doi.org/10.1117/12.2059473

KEYWORDS: Fiber Bragg gratings, Sensors, Transducers, Spatial resolution, Environmental sensing, Distortion, Temperature metrology, Temperature sensors, Transmission electron microscopy, Fiber optics sensors

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Proceedings Article | 2 June 2014 Paper

Optical fiber Fabry-Pérot sensor fabrication based on focused ion beam post-processing

Ricardo Andre, Simon Pevec, Martin Becker, Jan Dellith, Manfred Rothhardt, Manuel Marques, Denis Donlagic, Hartmut Bartelt, Orlando Frazão

Proceedings Volume 9157, 91577T (2014) https://doi.org/10.1117/12.2059175

KEYWORDS: Sensors, Ion beams, Etching, Optical fibers, Structured optical fibers, Silica, Scanning electron microscopy, Glasses, Wet etching, Fiber optics sensors

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Proceedings Article | 2 June 2014 Paper

Advanced fabrication and calibration of high-temperature sensor elements based on sapphire fiber Bragg gratings

Tino Elsmann, Tobias Habisreuther, Manfred Rothhardt, Reinhardt Willsch, Hartmut Bartelt

Proceedings Volume 9157, 91572N (2014) https://doi.org/10.1117/12.2059182

KEYWORDS: Fiber Bragg gratings, Sapphire, Calibration, Sensors, Temperature metrology, Crystals, Silica, Fiber optics sensors, Fabrication, Sensor calibration

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Proceedings Article | 2 June 2014 Paper

First order fiber Bragg grating inscription with femtosecond laser and reflection wavelengths from visible to infrared

Martin Becker, Tino Elsmann, Anka Schwuchow, Manfred Rothhardt, Sebastian Dochow, Hartmut Bartelt

Proceedings Volume 9157, 91572T (2014) https://doi.org/10.1117/12.2059289

KEYWORDS: Fiber Bragg gratings, Fiber lasers, Femtosecond phenomena, Optical fibers, Erbium lasers, Visible radiation, Erbium, Ultraviolet radiation, Reflection, Infrared radiation

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Proceedings Article | 2 June 2014 Paper

Regeneration experiments with fibre Bragg gratings in hydrogen out-diffused fibres

Leonhard Polz, Andreas Dörfler, Hartmut Bartelt, Johannes Roths

Proceedings Volume 9157, 91577F (2014) https://doi.org/10.1117/12.2059552

KEYWORDS: Hydrogen, Fiber Bragg gratings, Diffusion, Reflectivity, Cladding, Optical fibers, Chemical species, Molecules, Glasses, Ultraviolet radiation

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Proceedings Article | 2 June 2014 Paper

Analysis of the air holes' geometry influence on longitudinal strain sensitivity of microstructured fiber Bragg gratings

T. Tenderenda, K. Stepien, L. Szostkiewicz, M. Murawski, M. Szymanski, M. Becker, M. Rothhardt, H. Bartelt, P. Mergo, K. Poturaj, K. Skorupski, P. Marć, L. Jaroszewicz, T. Nasilowski

Proceedings Volume 9157, 91578M (2014) https://doi.org/10.1117/12.2059652

KEYWORDS: Fiber Bragg gratings, Refractive index, Structured optical fibers, Germanium, Femtosecond phenomena, Micro optical fluidics, Sensors, Cladding, Fiber characterization, Wave propagation

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Proceedings Article | 2 May 2014 Paper

Fiber Bragg grating inscription in novel highly strains sensitive microstructured fiber

K. Stepien, T. Tenderenda, M. Murawski, M. Szymanski, L. Szostkiewicz, M. Becker, M. Rothhardt, H. Bartelt, P. Mergo, K. Poturaj, L. Jaroszewicz, T. Nasilowski

Proceedings Volume 9128, 91280E (2014) https://doi.org/10.1117/12.2051315

KEYWORDS: Fiber Bragg gratings, Micro optical fluidics, Refractive index, Structured optical fibers, Silica, Doping, Spectroscopy, Femtosecond phenomena, Temperature metrology, Polishing

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Proceedings Article | 7 March 2014 Paper

Longitudinal strain sensing with photonic crystal fibers and fiber Bragg gratings

T. Tenderenda, M. Murawski, M. Szymanski, L. Szostkiewicz, M. Becker, M. Rothhardt, H. Bartelt, P. Mergo, Kl Poturaj, M. Makara, K. Skorupski, P. Marc, L. Jaroszewicz, T. Nasilowski

Proceedings Volume 8982, 898219 (2014) https://doi.org/10.1117/12.2038387

KEYWORDS: Fiber Bragg gratings, Refractive index, Structured optical fibers, Photonic crystal fibers, Femtosecond phenomena, Sensors, Head, Dispersion, Numerical analysis, Light sources

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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 | 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 | 18 November 2013 Paper

Study of temperature sensor fiber with high germanium doped core

F. Fávero, M. Becker, R. Spittel, M. Rothhardt, J. Kobelke, H. Bartelt

Proceedings Volume 8785, 8785CC (2013) https://doi.org/10.1117/12.2026158

KEYWORDS: Germanium, Single mode fibers, Fiber Bragg gratings, Interferometers, Temperature metrology, Temperature sensors, Fiber optics sensors, Sensors, Cladding, Refractive index

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Proceedings Article | 18 November 2013 Paper

Laser processed preforms for microstructured optical fibers

Martin Becker, Marcel Werner, Oliver Fitzau, Dominik Esser, Jens Kobelke, Kay Schuster, Adrian Lorenz, Anka Schwuchow, Manfred Rothhardt, Dieter Hoffmann, Hartmut Bartelt

Proceedings Volume 8785, 8785C9 (2013) https://doi.org/10.1117/12.2023223

KEYWORDS: Laser drilling, Structured optical fibers, Fiber lasers, Fiber Bragg gratings, Micro optical fluidics, Laser applications, Glasses, Silica, Absorption, Signal attenuation

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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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SPIE Journal Paper | 8 July 2013

High birefringence triangular optical nanowire in suspended-core fiber for temperature sensing

Ricardo Andre, Martin Becker, Kay Schuster, Manfred Rothhardt, Hartmut Bartelt, Manuel Marques, Orlando Frazão

JNP, Vol. 7, Issue 01, 073088, (July 2013) https://doi.org/10.1117/12.10.1117/1.JNP.7.073088

KEYWORDS: Birefringence, Sagnac interferometers, Optical fibers, Sensors, Polarization, Silica, Structured optical fibers, Single mode fibers, Cladding, Nanowires

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