Manufacturing with novel high-power diode lasers

IEEE Journal on Selected Topics in Quantum Electronics

Volumn 6, Issue 4, 2000, Pages 696-705

  Schulz, Wolfgang ^a   Poprawe, Reinhart ^a  

^a FRAUNHOFER INSTITUTE FOR LASER TECHNOLOGY   (Germany)

Author keywords

[No Author keywords available]

Indexed keywords

APPROXIMATION THEORY; BOUNDARY VALUE PROBLEMS; ELECTRIC POWER SUPPLIES TO APPARATUS; HIGH POWER LASERS; INDUSTRIAL APPLICATIONS; LASER BEAM CUTTING; LIGHT EMISSION; METAL WORKING; PHASE SPACE METHODS; SEMICONDUCTOR DEVICE STRUCTURES; STAINLESS STEEL;

CONTINUOUS WAVE OUTPUT POWER; FREE BOUNDARY PROBLEM; HIGH POWER DIODE LASER; THERMAL PROCESSING; Z-SHAPED BROAD AREA EMITTER;

SEMICONDUCTOR LASERS;

EID: 0034217331     PISSN: 1077260X     EISSN: None     Source Type: Journal    
DOI: 10.1109/2944.883386     Document Type: Article

References (27)

1. A. Gillner, P. Loosen, D. Petring, K. Wissenbach, and R. Poprawe, "Industrial applications of high power lasers," in Proc. ICALEO99, San Diego, CA, 1999.
2. V. Sturm, H.-G. Treusch, and P. Loosen, "Cylindrical microlenses for collimating high power diode lasers," in Proc. SPIE, vol. 3097, 1997, pp. 717-726.
3. K. Du, J. Liao, and P. Loosen, "Nd : Yag slab laser end-pumped by laserdiode stacks and its beam shaping," Opt. Commun., vol. 140, pp. 53-56, 1997.
4. J. Braunstein, M. Mikulla, R. Kiefer, M. Walther, J. Jandeleit, W. Brandenburg, P. Loosen, R. Poprawe, and G. Weimann, 267 W CW AlGaAs/GaInAs diode laser bars, in Proc. Photonics West, in press.
5. M. Mikulla, A. Schmit, P. Chazan, A. Wetzel, M. Walther, R. Walther, R. Kiefer, W. Pletschen, J. Braunstein, and G. Weimann, "Improved beam quality for high power tapered laser diodes with LMG (low modal gain)-epitaxial layer structures," in Proc. SPIE, In-Plane Semiconductor Lasers: From Ultraviolet to Mid-Infrared II, H. K. Choi and P. S. Zory, Eds., 1998, vol. 3284, pp. 72-79.
6. J. Jandeleit, N. Wiedmann, A. Ostlender, W. Brandenburg, P. Loosen, and R. Poprawe, "Fabrication and characterization of high power diode lasers," in Proc. SPIE, ISPA, vol. 3896, 1999, pp. 65-70.
7. S. Sanders, "High power coherent two-dimensional semiconductor laser array," Appl. Phys. Lett., vol. 64, no. 12, p. 1478, 1994.
8. R. J. Lang, K. Dzurko, A. A. Hardy, S. Demars, A. Schoenfelder, and D. F. Welch. "Theory of grating-confined broad-area lasers," IEEE J. Quantum Electron., vol. 34, p. 2196, Nov. 1998.
9. V. V. Apollonov, "Phase locking of eight wide-aperture semiconductor laser diodes in an external Talbot cavity," IEEE J. Quantum Electron., vol. 28, p. 344, Apr. 1998.
10. J. R. Leger, G. Mowry, and D. Chen, "Modal analysis of a Talbot cavity," Appl. Phys. Lett., vol. 64, no. 22, p. 2397, 1994.
11. K. Boucke, "Phasengekoppelte Arrays für Hochleistungsdiodenlaserk," Ph.D. dissertation, RWTH-Aachen, Fraunhofer Institut Lasertechnik Aachen, 1999. preprint.
12. K. Boucke, K. Du, P. Loosen, and R. Poprawe, "Optische resonatoren," Fraunhofer Institut Lasertechnik Aachen, FhG-patent pending, 1999.
13. P. Abels, C. Kratzsch, W. Schulz, S. Kaierle, and R. Poprawe, Universal coaxial process control system for laser material processing, in Proc. ICALEO99, San Diego, CA, 1999. to be published.
14. C. Kratzsch, P. Abels, S. Kaierle, R. Poprawe, and W. Schulz, Coaxial process control during laser beam welding, in Proc. AHPLA99, Osaka, Japan, 1999. to be published.
15. J. Beersiek, R. Poprawe, W. Schulz, R. Mueller, and W. W. Duley, "On-line monitoring of penetration depth in laser beam welding," in Proc. ICALEO'97, San Diego, CA, 1997.
16. H. Zefferer, D. Petring, W. Schulz, F. Schneider, and G. Herziger, "Laserstrahlschmelzschneiden: Diagnostik und Modellierung des Schmelznachlaufes und der Riefenbildung," in Strahl-Stoff-Wechselwirkung bei der Laserstrahlbearbeitung, 2.3 Prozeβmodelle, M. Geiger and F. Hollmann, Eds, Bamberg: Meisenbach Verlag, 1993. pp. 123-128. Ergebnisse des DFG-Schwerpunktprogramms 1991-1992.
17. J. C. Robinson, "Finite dimensional behavior in partial differential equations (review article)," Chaos, vol. 5, pp. 330-345, 1995.
18. V. Enß, V. Kostrykin, W. Schulz, C. Zimmermann, H. Zefferer, and D. Petring, "Thermische Materialbearbeitung mit Laserstrahlung: Schmelzschneiden," in Mathematik - Schlüsseltechnologie für die Zukunft, K.-H. Hoffmann, W. Jäger, T. Lohmann, and H. Schunk, Eds, Berlin, Germany: Springer-Verlag, 1997, pp. 161-174.
19. W. Schulz, V. Kostrykin, M. Niessen, J. Michel, E. W. Kreutz, and R. Poprawe, "Dynamics of ripple formation and melt flow in laser beam cutting," J. Phys. D: Appl. Phys., vol. 32, pp. 1219-1228, 1999.
20. H. Goldstein, Klassische Mechanik. Wiesbaden, Germany: Akademische Verlagsgesellschaft, 1978, pp. 21-25, 377-381.
21. W. Schulz, V. Kostrykin, H. Zefferer, D. Petring, and R. Poprawe, "A free boundary value problem related to laser beam fusion cutting: ODE approximation," Int. J. Heat and Mass Transfer, vol. 40/12, pp. 2913-2928, 1997.
22. A. F. Filippov, Differential Equations with Discontinuous Righthand Sides, Dordrecht, Germany: Kluwer, 1988.
23. J. Franke, W. Schulz, and G. Herziger, "Burnoff-stabilized laser beam oxygen cutting - A new process," in Welding and Cutting, 1993, vol. 45, pp. 490-493, E161-E162.
24. J. Franke, Modellierung und Optimierung des Laserstrahl-brennschneidens niedriglegierter Stähle, DVS-Berichte Band, vol. 161, pp. 122-153, 1994. Ph.D. dissertation.
25. D. Radaj, Wärmewirkungen des Schweiβens. Berlin, Germany: Springer-Verlag, 1998, p. 65.
26. T. R. Anthony and H. E. Cline, "Surface rippling induced by surfacetension gradients during laser surface melting," J. Appl. Phys., vol. 48, no. 9, pp. 3888-3894, 1977.
27. W. Schulz, Dynamics of Thermal Ablation Processes with Boundary Layer Character, Aachen, Germany: Shaker Verlag Aachen, to be published.