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Numerical analysis of external feedback concepts for spectral stabilization of high-power broad-area semiconductor lasers

: Holly, C.; Hengesbach, S.; Traub, M.; Hoffmann, D.


Zediker, M.S. ; Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.:
High-power diode laser technology and applications XII : 2 - 4 February 2014, San Francisco, California, United States
Bellingham, WA: SPIE, 2014 (Proceedings of SPIE 8965)
ISBN: 978-0-8194-9878-6
Paper 89650K, 8 S.
Conference "High-Power Diode Laser Technology and Applications" <12, 2014, San Francisco/Calif.>
Fraunhofer ILT ()

Four different external resonator concepts including VBGs for spectral stabilization of HPDLs are modelled and numerically evaluated to be compared to each other with respect to stabilization efficiency and sensitivity to the âsmile-error". The coupled resonators including the external system and the diode laser are solved with a Fox-Li approach. The paper gives a brief summary about the applied simulation model and proceeds with the results for the different feedback concepts. The effective reflectivity, losses in the optical system, losses due to the back-coupling into the waveguide and the averaged optical confinement factor are calculated.