Diode Lasers

Products and Services Diode Lasers

Characterization of High Power Diode Lasers

  • Near and far field patterns and spectral distribution
  • Wall plug efficiency and output power
  • Polarization
  • Emitter-resolved analysis of diode laser bars
  • “Smile" measurement and strain analysis

Spectral Design

  • External resonators (Fiber Bragg Gratings, Volume Gratings) for frequency stabilization
  • Dense wavelength multiplexing
  • Analysis of thermal wavelength shift
  • Design and manufacturing of Volume Gratings

High Power Diode Laser Systems

  • Beam shaping of single emitters and laser bars
  • Systems based on Broad Area Lasers, (DBR) Tapered Lasers, Ridge Lasers and Quantum Dot Lasers
  • Spatial multiplexing of single emitters for multimode fiber coupling
  • Beam transformation and multimode fiber coupling of laser bars
  • Fiber coupling of single mode emitters
  • Super-pulsed diode lasers
  • Algorithms for automated assembly of micro optics


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)

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)

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)

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, Nr. 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, Nr. 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)

M. Traub, M. Giesberts, J. Geiger, C. Johnigk, H.-D. Hoffmann
High peak power fiber coupled super-pulsed diode lasers
Proc. SPIE
7198, 71980W-1-71980W-10, (2009)

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

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

Frequency stabilized high brightness tapered amplifier and laser modules
Proc. SPIE
6997, 69971A, (2008)

J. Miesner, F. Frischkorn, N. Boenig, D. Rose, T. Vahrenkamp, K. Boucke
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., (2008)

N. Michel, M. Lecomte, O. Parillaud, M. Calligaro, M. Krakowski, T. Westphalen, M. Traub
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)

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

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

C. Wessling, S. Hengesbach, J. Geiger, J. Dolkemeyer, M. Traub, D. Hoffmann
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)