Dr. Jens U. Thomas Profile

Dr. Jens U. Thomas

at Friedrich-Schiller Univ Jena

SPIE Involvement:

Author | Instructor

Publications (16)

Proceedings Article | 18 July 2024 Presentation + Paper

Presentation + Paper

The MICADO first light imager for the ELT: overview and current status

E. Sturm, R. Davies, J. Alves, Y. Clénet, J. Kotilainen, A. Monna, H. Nicklas, J.-U. Pott, E. Tolstoy, B. Vulcani, J. Achren, S. Annadevara, H. Anwand-Heerwart, C. Arcidiacono, S. Barboza, L. Barl, P. Baudoz, R. Bender, N. Bezawada, F. Biondi, P. Bizenberger, A. Blin, A. Boné, P. Bonifacio, B. Borgo, J. van den Born, T. Buey, Y. Cao, F. Chapron, G. Chauvin, F. Chemla, K. Cloiseau, M. Cohen, C. Colin, O. Czoske, J.-O. Dette, M. Deysenroth, E. Dijkstra, S. Dreizler, O. Dupuis, G. van Egmond, F. Eisenhauer, E. Elswijk, A. Emslander, M. Fabricius, G. Fasola, F. Ferreira, N. Förster Schreiber, A. Fontana, J. Gaudemard, N. Gautherot, E. Gendron, C. Gennet, R. Genzel, L. Ghouchou, S. Gillessen, D. Gratadour, A. Grazian, F. Grupp, S. Guieu, M. Gullieuszik, M. de Haan, J. Hartke, M. Hartl, F. Haussmann, T. Helin, H.-J. Hess, R. Hofferbert, H. Huber, E. Huby, J.-M. Huet, D. Ives, A. Janssen, P. Jaufmann, T. Jilg, D. Jodlbauer, J. Jost, W. Kausch, H. Kellermann, F. Kerber, H. Kravcar, K. Kravchenko, C. Kulcsár, H. Kuncarayakti, P. Kunst, S. Kwast, F. Lang, J. Lange, V. Lapeyrere, B. Le Ruyet, K. Leschinski, H. Locatelli, D. Massari, S. Mattila, S. Mei, F. Merlin, E. Meyer, C. Michel, L. Mohr, M. Montargès, F. Müller, N. Münch, R. Navarro, U. Neumann, N. Neumayer, L. Neumeier, F. Pedichini, A. Pflüger, R. Piazzesi, L. Pinard, J. Porras, E. Portulari, N. Przybilla, S. Rabien, J. Raffard, R. Ragazzoni, R. Ramlau, J. Ramos, S. Ramsay, H.-F. Raynaud, P. Rhode, A. Richter, H.-W. Rix, M. Rodenhuis, R.-R. Rohloff, R. Romp, P. Rousselot, N. Sabha, B. Sassolas, J. Schlichter, M. Schuil, M. Schweitzer, U. Seemann, A. Sevin, M. Simioni, L. Spallek, A. Sönmez, J. Suuronen, S. Taburet, J. Thomas, E. Tisserand, P. Vaccari, E. Valenti, G. Verdoes Kleijn, M. Verdugo, F. Vidal, R. Wagner, M. Wegner, D. van Winden, J. Witschel, A. Zanella, W. Zeilinger, J. Ziegleder, B. Ziegler

Proceedings Volume 13096, 1309611 (2024) https://doi.org/10.1117/12.3017752

KEYWORDS: Imaging systems, James Webb Space Telescope, Imaging spectroscopy, Design and modelling, Adaptive optics, Stars, Manufacturing, Equipment, Wavefront sensors, Spectroscopes

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Proceedings Article | 4 March 2016 Paper

Paper

Simultaneous spatial and temporal focusing: a route towards confined nonlinear materials processing

Robert Kammel, Klaus Bergner, Jens Thomas, Roland Ackermann, Stefan Skupin, Stefan Nolte

Proceedings Volume 9736, 97360T (2016) https://doi.org/10.1117/12.2209540

KEYWORDS: Materials processing, Multiphoton microscopy, Picosecond phenomena, Laser processing, Ultrafast phenomena, Pulsed laser operation, Glasses, Numerical simulations, Surgery, Image resolution

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Proceedings Article | 4 March 2015 Paper

Paper

Femtosecond inscribed mode modulators in large mode area fibers: experimental and theoretical analysis

Ria Krämer, Philipp Gelszinnis, Christian Voigtländer, Christian Schulze, Jens Thomas, Daniel Richter, Michael Duparré, Stefan Nolte

Proceedings Volume 9344, 93440E (2015) https://doi.org/10.1117/12.2079769

KEYWORDS: Modulators, Optical fibers, Refractive index, Computer generated holography, Cladding, Femtosecond phenomena, Optical filters, Ultrafast phenomena, Fiber lasers, Step index fibers

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Proceedings Article | 7 March 2014 Paper

Paper

Simultaneously spatially and temporally focusing light for tailored ultrafast micro-machining

Jens Thomas, Erica Block, Michael Greco, Amanda Meier, Charles Durfee, Jeffrey Squier, Stefan Nolte, Andreas Tünnermann

Proceedings Volume 8972, 897219 (2014) https://doi.org/10.1117/12.2037933

KEYWORDS: Dispersion, Ultrafast phenomena, Micromachining, Objectives, Collimation, Beam splitters, Microscopy, Ultrafast lasers, Crystals, Pulsed laser operation

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Proceedings Article | 26 February 2013 Paper

Paper

Femtosecond pulse inscription of a selective mode filter in large mode area fibers

Ria Krämer, Christian Voigtländer, Erik Freier, Andreas Liem, Jens Thomas, Daniel Richter, Thomas Schreiber, Andreas Tünnermann, Stefan Nolte

Proceedings Volume 8601, 86010S (2013) https://doi.org/10.1117/12.2004349

KEYWORDS: Optical filters, Fiber Bragg gratings, Optical fibers, Refractive index, Femtosecond phenomena, Reflectivity, Cladding, Fiber lasers, Nonlinear filtering, Supercontinuum sources

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Proceedings Article | 13 September 2012 Paper

Paper

Second generation OH suppression filters using multicore fibers

R. Haynes, T. Birks, J. Bland-Hawthorn, J. Cruz, A. Diez, S. Ellis, D. Haynes, R. Krämer, B. Mangan, S. Min, D. Murphy, S. Nolte, J. C. Olaya, J. Thomas, C. Trinh, A. Tünnermann, Christian Voigtländer

Proceedings Volume 8450, 845011 (2012) https://doi.org/10.1117/12.925923

KEYWORDS: Fiber Bragg gratings, Ultraviolet radiation, Photonics, Optical filters, Cladding, Structured optical fibers, Astronomy, Manufacturing, Femtosecond phenomena, Optical fibers

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Proceedings Article | 16 February 2012 Paper

Paper

Tailored fiber Bragg gratings inscribed with a phase mask and a deformed wave front by ultrashort pulses

Ria Becker, Christian Voigtländer, Jens Thomas, Daniel Richter, Anshuman Singh, Andreas Tünnermann, Stefan Nolte

Proceedings Volume 8237, 82372H (2012) https://doi.org/10.1117/12.909922

KEYWORDS: Wavefronts, Fiber Bragg gratings, Diffraction, Ultrafast phenomena, Diffraction gratings, Monochromatic aberrations, Geometrical optics, Fiber lasers, Zernike polynomials, Femtosecond phenomena

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Proceedings Article | 16 February 2012 Paper

Paper

CGH-based real-time analysis of fiber Bragg gratings in few mode LMA fibers

Markus Mundus, Jens Thomas, Christian Voigtländer, Ria Becker, Cesar Jauregui, Andreas Tünnermann, Stefan Nolte

Proceedings Volume 8237, 823712 (2012) https://doi.org/10.1117/12.910290

KEYWORDS: Fiber Bragg gratings, Refractive index, Spatial light modulators, Computer generated holography, Ultrafast phenomena, Waveguides, Cladding, Dielectrics, Reflectivity, Fiber couplers

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Proceedings Article | 26 May 2011 Paper

Paper

Monolithic narrow linewidth polarization-maintaining thulium fiber laser using femtosecond laser written fiber Bragg gratings

Christina C. Willis, Joshua Bradford, R. Andrew Sims, Lawrence Shah, Martin Richardson, Jens Thomas, Ria Becker, Christian Voigtländer, Andreas Tünnermann, Stefan Nolte

Proceedings Volume 8039, 80390H (2011) https://doi.org/10.1117/12.885989

KEYWORDS: Fiber Bragg gratings, Polarization, Fiber lasers, Reflectivity, YAG lasers, Femtosecond phenomena, Laser systems engineering, Optical components, Optical fibers, Phase modulation

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Proceedings Article | 11 February 2011 Paper

Paper

Fs laser induced apodised Bragg waveguides in fused silica

Christian Voigtländer, Peter Zeil, Jens Thomas, Martin Ams, Robert Williams, Michael Withford, Andreas Tünnermann, Stefan Nolte

Proceedings Volume 7925, 79250Y (2011) https://doi.org/10.1117/12.886306

KEYWORDS: Refractive index, Modulation, Waveguides, Fiber Bragg gratings, Femtosecond phenomena, Silica, Apodization, Laser systems engineering, Reflectivity, Fabrication

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Proceedings Article | 11 February 2011 Paper

Paper

All-fiber single-mode PM thulium fiber lasers using femtosecond laser written fiber Bragg gratings

Christina C. Willis, Joshua Bradford, R. Andrew Sims, Lawrence Shah, Martin Richardson, Jens Thomas, Ria Becker, Christian Voigtländer, Andreas Tünnermann, Stefan Nolte

Proceedings Volume 7914, 79140I (2011) https://doi.org/10.1117/12.877795

KEYWORDS: Fiber Bragg gratings, Fiber lasers, Polarization, Phase modulation, YAG lasers, Thulium, Continuous wave operation, Femtosecond phenomena, Laser systems engineering, Birefringence

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Proceedings Article | 25 February 2010 Paper

Paper

Mode selective fiber Bragg gratings

Jens Thomas, Christian Voigtländer, Stefan Nolte, Andreas Tünnermann, Nemanja Jovanovic, Graham Marshall, Michael Withford, Michael Steel

Proceedings Volume 7589, 75890J (2010) https://doi.org/10.1117/12.843805

KEYWORDS: Fiber Bragg gratings, Cladding, Ultrafast phenomena, Reflectivity, Fiber lasers, High power fiber lasers, Laser systems engineering, Femtosecond phenomena, Refractive index, Single mode fibers

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Proceedings Article | 17 February 2010 Paper

Paper

Passively stabilized 215-W monolithic CW LMA-fiber laser with innovative transversal mode filter

Fabian Stutzki, Cesar Jauregui, Christian Voigtländer, Jens Thomas, Jens Limpert, Stefan Nolte, Andreas Tünnermann

Proceedings Volume 7580, 75801K (2010) https://doi.org/10.1117/12.841662

KEYWORDS: Fiber Bragg gratings, Reflectivity, Fiber lasers, Optical filters, Laser stabilization, Refractive index, Digital filtering, Oscillators, Fabry–Perot interferometers, Continuous wave operation

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Proceedings Article | 5 October 2009 Paper

Paper

Temperature and strain discriminating sensor based on the monitoring of cladding modes of a single femtosecond inscribed grating

Nemanja Jovanovic, Robert Williams, Jens Thomas, M. Steel, Graham Marshall, Alexander Fuerbach, Stefan Nolte, Andreas Tünnermann, Michael Withford

Proceedings Volume 7503, 750336 (2009) https://doi.org/10.1117/12.835094

KEYWORDS: Fiber Bragg gratings, Sensors, Cladding, Femtosecond phenomena, Temperature metrology, Refractive index, Optical fibers, Thermal optics, Semiconductor lasers, Photonics

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Proceedings Article | 25 February 2009 Paper

Paper

Evanescently coupled fs laser-written type II waveguide array in lithium niobate

Matthias Heinrich, Felix Dreisow, Alexander Szameit, Jens Thomas, Sven Döring, Stefan Nolte, Andreas Tünnermann, Antonio Ancona

Proceedings Volume 7203, 72030H (2009) https://doi.org/10.1117/12.814480

KEYWORDS: Waveguides, Lithium niobate, Waveguide lasers, Femtosecond phenomena, Refractive index, Light wave propagation, Diffraction, Crystals, Wave propagation, Photomicroscopy

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Proceedings Article | 13 March 2007 Paper

Paper

Inscribing fiber Bragg gratings using IR-fs pulses and a phase-mask scanning technique: potential and applications

E. Wikszak, J. Thomas, S. Nolte, A. Tünnermann

Proceedings Volume 6460, 64600Z (2007) https://doi.org/10.1117/12.711993

KEYWORDS: Fiber Bragg gratings, Fiber lasers, Diffraction, Femtosecond phenomena, Diffraction gratings, Photomasks, Refractive index, Erbium, Absorption, Reflectivity

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Showing 5 of 16 publications

Course Instructor

SC1087: Fiber Bragg Gratings: Production, Modeling and Applications

Fiber Bragg gratings (FBGs) are key elements in the construction of integrated fiber optic systems. Using gratings inscribed into optical fibers, miniature components can be constructed which perform the functions of bulk components such as narrow and broad band mirrors, dispersion compensators, beam combiners and prism couplers. This course covers the fundamentals of FBGs as well as recent developments like ultrashort pulse FBG inscription and multimode FBGs. The emphasis of this course is on specific applications, e.g. monolithic fiber laser cavities and cladding mode sensors.

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