Diodenlaser

Fasergekoppelte Diodenlaser gehören zu den preisgünstigsten und effizientesten Strahlquellen für cw-Laserapplikationen und werden beispielsweise beim Härten, Löten und Schweißen von Metallen vielfältig eingesetzt. Das Fraunhofer ILT entwickelt Diodenlaser für maßgeschneiderte optische Systeme, die hohe Anforderungen erfüllen. Selbstentwickelte sowie kommerzielle Softwaretools ermöglichen dabei die Modellierung und Optimierung komplexer Lasersysteme. Direkte Diodenlaser mit einer optischen Ausgangsleistung im kW-Bereich stellen bei Schneidanwendungen eine kostengünstige Alternative zu Faserlasern dar. Das stabilisierte Emissionsspektrum und die Strahlqualität des Diodenlasers können ebenso vorteilhaft in Pumpanwendungen für Multi-kW-Faserlaser oder Ultrakurzpulslaser eingesetzt werden. Neben der gezielten Strahlformung stehen auch die Weiterentwicklung von Faserkopplung und Wellenlängenstabilisierung von Diodenlasern im Fokus von Forschung und Entwicklung.

Das Leistungsangebot umfasst FuE-Dienstleistungen im Bereich Design und Simulation, experimentelle Untersuchungen an Labormustern, die Entwicklung industrienaher, zertifizierter Prototypen und umfassende Technologieberatung sowie Markt-und Machbarkeitsstudien.

Charakterisierung von Hochleistungsdiodenlasern

• Messung von
  • Nah- und Fernfeldverteilung
  • Spektrale Verteilung
  • Wirkungsgrad
  • Leistung
  • Polarisation
• Emitter-aufgelöste Analyse von Diodenlaser-Barren
• „Smile“-Messung
• Verspannungsanalyse

Hochleistungsdiodenlaser-Systeme

• Strahlformung von Einzelemittern und Laserbarren
• Systeme auf Basis von Breitstreifenemittern, (DBR) Trapezlasern, Ridgelasern, Quantenpunkt Lasern
• Spektrales Multiplexen zur Multimodefaserkopplung von Einzelemittern
• Strahltransformation und Multimodefaserkopplung von Diodenlaserbarren
• Singlemode-Faserkopplung von Einzelemittern
• Supergepulste Diodenlaser
• Algorithmen zur automatisierten Montage von Mikrooptiken

Spektrales Design

• Externe Resonatoren (Faserbragg-Gitter, Volumen-Gitter) zur Frequenzstabilisierung
• Dichte inkohärente Wellenlängenkopplung
• Analyse der thermischen Wellenlängenverschiebung
• Auslegung und Fertigung von Volumen-Gittern

Klein, S., Giesberts, M., Traub, M., Fitzau, O., Hoffmann, D.:
Frequency stabilization of multimode diode lasers with fiber Bragg gratings.
High Power Diode Lasers and Systems Conference (HPD), 9-10 Oct. 2019 Coventry, United Kingdom, United Kingdom. 2019 IEEE High Power Diode Lasers and Systems Conference (HPD), (2 S.) (2019)
https://doi.org/10.1109/HPD48113.2019.8938607

Adams, M., Rauch, S, Holly, C., Bussek, T., Traub, M., Hoffmann, D.:
GPU-Accelerated Wave-Optical Simulation of Beam-Transformation System for High-Power Diode Lasers.
High Power Diode Lasers and Systems Conference (HPD), 9-10 Oct. 2019 Coventry, United Kingdom, United Kingdom. 2019 IEEE High Power Diode Lasers and Systems Conference (HPD), (2 S.) (2019)
https://doi.org/10.1109/HPD48113.2019.8938673

Traub, M., Holly, C., Hoffmann, D., Widmann, C., Zuerbig, V., Nebel, C.:
Synthetic Mono-Crystalline Diamond Lenses for High Power Laser Materials Processing Applications.
OSA Optical Design and Fabrication Congress, IODC 2017, 09 - 13 July 2017, Denver, Colorado, United States.
Optics InfoBase Conference Papers Volume Part F56-OFT 2017, 2017, (3 S.) (2017)

Witte, U., Schneider, F., Holly, C., Di Meo, A., Rubel, D., Boergmann, F., Traub, M., Hoffmann, D., Drovs, S., Brand, T., Unger, A.:
kW-class direct diode laser for sheet metal cutting based on commercial pump modules.
High-Power Diode Laser Technology XV, San Francisco, California, United States, 28. Januar – 2. Februar 2017. Proc. SPIE Vol. 10086 (13 S.) (2017)

Neumann, A., Giesberts, M., Witte, U., Fitzau, O., Hoffmann, H.-D.:
Analytical model for diode-to-fiber coupling and beam propagation in weakly guiding fibers.
2017 IEEE High Power Diode Lasers and Systems Conference (HPD), 11 Oct - 12 Oct 2017, Coventry, UK.
Proc. IEEE High Power Diode Lasers & Systems, 35-36 (2017)

Witte, U., Traub, M.:
Cost efficient diode laser beam source for sheet metal cutting
Laser Techn. J. 14 (1), 36-39 (2017)

Schimmel, G., Janicot, S., Hanna, M., Decker, J., Crump, P., Erbert, G., Witte, U., Traub, M., Georges, P., Lucas-Leclin, G.:
Coherent beam combining architectures for high power tapered laser arrays
Proc. SPIE 10086, 100860O (11 S.) (2017)

Witte, U., Schneider, F., Traub, M., Hoffmann, D., Drovs, S., Brand, T., Unger, A.:
kW-class direct diode laser for sheet metal cutting based on DWDM of pump modules by use of ultra-steep dielectric filters
Opt. Expr. 24 (20), 22917-22929 (2016)

Fraugeron, M., Klein, S., Vilera, M., Kochem, G., Perez-Serrano, A., Krakowski, M., Traub, M.:
Laser module based on monolithically integrated MOPAs at 1.5 μm for space-borne lidar applications
ICSO 2016. International Conference on Space Optics. Biarritz, France, 18 - 21 October 2016. Paper 156 (8 S.) (2016)

Hengesbach, S., Klein, S., Holly, C., Witte, U., Traub, M., Hoffmann, D.:
Simultaneous frequency stabilization and high-power dense wavelength division multiplexing (HP-DWDM) using an external cavity based on volume Bragg gratings (VBGs)
Proc. SPIE 9733, 15 S. (2016)

Schimmel, G., Doyen, I., Janicot, S., Hanna, M., Georges, P., Lucas-Leclin, G., Decker, J., Crump, P., Erbert, G.: Kaunga-Nyirenda, S., Moss, D., Bull, S., Larkins, E. C., Witte, U., Traub, M.: 
High-power operation of coherently coupled tapered laser diodes in an external cavity
Proc. SPIE 9733, 11 S. (2016)

Witte, U., Traub, M., Di Meo, A., Hamann, M., Rubel, D., Hengesbach, S., Hoffmann, D.:
Compact 35μm fiber coupled diode laser module based on dense wavelength division multiplexing of NBA mini-bars, Proc. SPIE 9733, 12 S. (2016)

Faugeron, M., Vilera, M., Krakowski, M., Robert, Y., Vinet, E., Primiani, P., Le Goec, J.-P., Parillaud, O., Pérez-Serrano, A., Tijero, J. M. G., Kochem, G., Traub, M., Esquivias, I., van Dijk, F.:
High power three-section integrated Master Oscillator Power Amplifier at 1.5 µm
IEEE Photon. Technol. Lett. 27 (13), 1449-1452 (2015)

Decker, J., Crump, P., Fricke, J., Maabdorf, A., Traub, M., Witte, U., Brand, T., Unger, A., Erbert, G., Trankle, G.:
25-W Monolithic Spectrally Stabilized 975-nm Minibars for Dense Spectral Beam Combining.
IEEE PHOTONICS TECHNOLOGY LETTERS 27, 1675-1678 (2015)

Hengesbach, S., Poprawe, R., Hoffmann, D., Traub, M., Schwarz, T., Holly, C., Eibl., F., Weisheit, A., Vogt, S., Britten, S., Ungers, M., Thombansen, U., Engelmann, C., Mamuschkin, V., Lott, P.:
Brightness and average power as driver for advancements in diode lasers and their applications
Proc. SPIE 9348, 93480B (18 S.) (2015)

Klein, S., Hengesbach, S., Westphalen, T., Traub, M., Hoffmann, D.:
Suppression of cross coupling in an external resonator for a diode laser bar with 19 single emitters 
Optics Letters 40, 641-644 (2015)

Rubel, D., Witte, U., Hengesbach, S., Traub, M., Hoffmann, D.:
Characterisation of ultra-narrow band filters for diode laser systems based on dense wavelength division multiplexing
2015 IEEE High Power Diode Lasers and Systems Conference (HPD), 14-15 Oct. 2015, 15-16 (2015)

Witte, U., Hamann, M., Di Meo, A., Rubel, D., Traub, M., Hoffmann, D.:
High power diode laser with 23W ex 35 μm fibre
2015 IEEE High Power Diode Lasers and Systems Conference (HPD), 14-15 Oct. 2015,17-18 (2015)

Witte, U., Rubel, D., Traub, M., Hamann, M., Hengesbach, S., Hoffmann, D.:
Dense wavelength multiplexing and 35 µm-fiber coupling of wavelength chirped high power diode laser bars
Advanced Solid State Lasers Conference 2015. Berlin, Germany, October 4-9, 2015. Paper AF1A.6 (3 S.) (2015)

Pérez-Serrano, A., Vilera, M., Esquivias, I., Faugeron, M., Krakowski, M., van Dijk, F., Kochem, G., Traub, M., Adamiec, P.,  Barbero, J., Ai, X., Rarity, J. G., Quatrevalet, M., Ehret, G.:
Atmospheric CO 2 remote sensing system based on high brightness semiconductor lasers and single photon counting detection.
PROCEEDINGS OF SPIE 9645, 1-10 (2015)

Klein, S., Hengesbach, S., Traub, M., Hoffmann, D.:
Frequency stabilisation of single emitters and the effect on the beam quality.
2015 IEEE High Power Diode Lasers and Systems Conference (HPD) : [Proceedings] - IEEE, 2015,13-14 (2015)

Esquivas, I., Pérez-Serrano, A. , Tijero, J. M. G. , Faugeron, M., Krakowski, M. , van Dijk, F. , Kochem, G., Traub, M., Adamiec, P. , Barbero, J., Al, X., Rarity, J., Quatrevalet, M., Ehret, G.:
LIDAR system based on a high brightness semiconductor laser and single photon counting detection for space-borne atmospheric CO2 monitoring.
9a Reunión Espanola de Optoelectrónica OPTOEL'15, Salamanca, Spain, OPTOEL'15, July 13-July 15, 2015. Salamanca : CLPU, 1-6 (2015)

Westphalen, T., Hengesbach, S., Holly, C., Traub, M., Hoffmann, D.:
Automated alignment of fast-axis collimator lenses for high-power diode laser bars.
Proc. of SPIE 8965, 1-6 (2014)

Esquivias, I., Pérez-Serrano, A., Tijero, J. M. G., Faugeron, M., van Dijk, F., Krakowski, M., Kochem, G., Traub, M., Barbero, J., Adamiec, P., Ai, X., Rarity, J., Quatrevalet, M., Ehret, G.:
RANDOM-MODULATION CW LIDAR SYSTEM FOR SPACE-BORNE CARBON DIOXIDE REMOTE SENSING BASED ON A HIGH-BRIGHTNESS SEMICONDUCTOR LASER.
International Conference on Space Optics , La Caleta, Tenerife , Spain , ICSO 2014, Oct. 7-10, (2014)

Esquivias, I., Consoli, A., Krakowski, M., Faugeron, M., Kochem, G., Traub, M., Barbero, J., Fiadino, P., Ai, X., Rarity, J., Quatrevalet, M., Ehret, G.:
High-brightness all semiconductor laser at 1.57 µm for space-borne lidar measurements of atmospheric carbon dioxide: device design and analysis of requirements
Proc. SPIE 9135, 913516 (8 S.) (2014)

Hengesbach, S., Hoffmann, D., Traub, M., Poprawe, R.:
Comparison of edge emitter and vertical emitter based diode lasers for materials processing
Proceedings 33rd Int. Congress on Applications of Lasers & Electro-Optics (ICALEO), October 19-23, 2014, San Diego, USA, Paper 304
(9 S.) (2014)

Hengesbach, S., Holly, C., Krauch, N., Witte, U., Westphalen, T., Traub, M., Hoffmann, D.:
High-Power Dense Wavelength Division Multiplexing (HP-DWDM) of frequency stabilized 9xx diode laser bars with a channel spacing of 1.5 nm
Proc. SPIE 8965, 89650C (9 S.) (2014)

Holly, C., Hengesbach, S., Traub, M., Hoffmann, D.:
Numerical analysis of external feedback concepts for spectral stabilization of high-power broad-area semiconductor lasers
Proc. SPIE 8965, 89650K (8 S.) (2014)

Moench, H., Andreadaki, A., Gronenborn, S., Kolb, J. S., Loosen, P., Miller, M., Schwarz, T., van der Lee, A., Weichmann, U.:
High power electrically pumped VECSEL and arrays
Vertical External Cavity Surface Emitting Lasers (VECSELs) IV
Editor(s): Jerome V. Moloney. Proc. SPIE Vol. 8966 (10 S.) (2014)

Crump, P., Knigge, S., Maaßdorf, A., Bugge, F., Hengesbach, S., Witte, U., Hoffmann, H. D., Köhler, B., Hubrich, R., Kissel, H., Biesenbach, J., Erbert, G., Tränkle, G.:
Low-loss, smile-insensitive external frequency-stabilization of high power diode lasers enabled by vertical designs with extremely low divergence angle and high efficiency
Proc. SPIE 8605, 0T1-13 (2013)

Hengesbach, S., Witte, U., Traub, M., Hoffmann, D.:
Design of a DFB/DBR diode laser module including spectral multiplexing based on VBGs
High Power Diode Lasers and Systems Conference (HPD)
West Midlands, United Kingdom, 16-17 Oct. 2013
Piscataway, N.J.: IEEE 2013, pp. 16-17

Unger, A., Brand, T., Bull, S., Larkins, E. C., Traub, M., Hengesbach, S., Uusimaa, P., Vilokkinen, V., Crump, P., Erbert, G., Luclas-Leclin, G., Georges, P., Rataj, T., Deichsel, E.:
The Bridle project: High brilliance diode lasers for industrial applications
High Power Diode Lasers and Systems Conference (HPD), 2013
West Midlands, United Kingdom,16-17 Oct. 2013
Piscataway, N.J.: IEEE 2013, pp. 28-29

Witte, U., Hengesbach, S., Traub, M., Strotkamp, M., Jungbluth, B., Hoffmann, D.:
High brightness diode laser module in the red spectral range for pumping applications
High Power Diode Lasers and Systems Conference (HPD), 2013
West Midlands, United Kingdom,16-17 Oct. 2013
Piscataway, N.J.: IEEE 2013, pp. 30-31

Crump, P., Hengesbach, S., Witte, U., Hoffmann, H.-D., Erbert, G., Tränkle, G.:
High-power diode lasers optimized for low-loss smile-insensitive external spectral stabilization
IEEE Photon. Technol. Lett. 24 (8), 703-705, (2012)

Gilfer, C., Pavelescu, E.-M., Reitmaier, J. P., Westphalen, T., Traub, M., Michel, N., Krakowski, M.:
15-W fiber-coupled quantum-dot pump module
IEEE Photon. Technol. Lett. 24 (12), 1030-1032, (2012)

Heinemann, S., Lewis, B., Regaard, B., Schmidt, T.:
Single emitter based diode lasers with high brightness, high power and narrow linewidth. 
Proc. SPIE 7918, 79180M, (6 S.) (2011)

Hengesbach, S., Krauch, N., Holly, C., Traub, M., Witte, U., Hoffmann, D.:
High-power dense wavelength division multiplexis of multimode diode laser radiation based on volume Bragg gratings 
Opt. Lett. 38, 3154-3157, (2013)

Holly, C., Hengesbach, S., Traub, M., Hoffmann, D.:
Simulation of spectral stabilization of high-power broad-area edge emitting semiconductor lasers 
Opt. Expr. 21, 15553-15567, (2013)

Löhring, J., Meissner, A., Hoffmann, D., Fix, A., Ehret, G., Alpers, M.:
Diode-pumped single-frequency-Nd:YGG-MOPA for water-vapor DIAL measurements: design, setup and performance. 
Appl. Phys. B 102, 917-935, (2011)

Schulz-Ruhtenberg, M., Babushkin, I. V., Loiko, N. A., Huang, K. F., Ackermann, T.
Polarization properties in the transition form below to above lasing threshold in broad-area vertical-cavity surface-emitting lasers
Phys. Rev. A 81, 23819, (11 S.) (2010)

Vijayakumar, D., Jensen, O.B., Ostendorf, R., Westphalen, T., Thestrup, B.
Spectral beam combining of a 980 nm tapered diode laser bar
Opt. Expr. 18, 893-898, (2010)

Wueppen, J., Pawlowski, E., Traub, M., Jungbluth, B., Hasler, K.-H., Sumpf, B., Erbert, G.
Compact module of a frequency-doubled, cw diode laser with an output power of more than 500mW at 531nm and a beam quality of less than 1.3 
Proc. SPIE 7582, 758204, (8 S.) (2010)

Traub, M., Giesberts, M., Geiger, J., Johnigk, C., Hoffmann, H.-D.:
High peak power fiber coupled super-pulsed diode lasers
Proc. SPIE 7198, 71980W (10 S.) (2009)

Kochem, G., Traub, M., Hengesbach, S., Hoffmann, D.:
High power fiber coupled modules based on tapered diode-lasers at 975 nm
Proc. SPIE 7198, 71980R, (10 S.) (2009)

Kochem, G., Traub, M., Hengesbach, S., Hoffmann, D.:
High power fiber coupled modules based on tapered diode-lasers at 975 nm
Proc. SPIE 7198, 71980R, (10 S.) (2009)

Kochem, G., Haverkamp, M., Boucke, K.:
Frequency stabilized high brightness tapered amplifier and laser modules.
Proc. SPIE 6997, 69971-69971 (2008)

Miesner, J., Frischkorn, F., Boenig, N., Rose, D., Vahrenkamp, T., Boucke, K.:
Full automated packaging of high power diode laser bars
58th Electronic Components & Technology Conf. 2008, Lake Beuna Vista/Fl., USA, May 27 - May 30, 2008
Piscataways/N.J: IEEE Pr., (6 S.) (2008)

Michel, N., Lecomte, M., Parillaud, O., Calligaro, M., Krakowski, M., Westphalen, T., Traub, M.:
High-wall plug efficiency broad area laser bar with strain-compensated quantum well
Proc. IEEE 21st International Semiconductor Laser Conference (ISLC) September 14-18, 2008
pp. 103-104, (2008)

Haverkamp, M., Kochem, G., Boucke, K.:
Single mode fiber coupled tapered laser module with frequency stabilized spectrum
Proc. SPIE 6876, 68761D, (2008)

Leers, M., Boucke, K., Götz, M., Meyer, A., Kelemen, M., Lehmann, N., Monti di Sopra, F.:
Thermal resistance in dependence of diode laser packages
Proc. SPIE 6876, (10 S.) (2008)

Wessling, C., Hengesbach, S., Geiger, J., Dolkemeyer, J., Traub, M., Hoffmann, D.:
50 W passively cooled, fiber coupled diode laser at 976 nm for pumping fiber lasers using 100 µm fiber bundles
Proc. SPIE 6876, (11 S.) (2008)

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